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Merge branch 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6

Browse source 
* 'for-linus' of git://git390.osdl.marist.edu/pub/scm/linux-2.6: (85 commits)
  [S390] provide documentation for hvc_iucv kernel parameter.
  [S390] convert ctcm printks to dev_xxx and pr_xxx macros.
  [S390] convert zfcp printks to pr_xxx macros.
  [S390] convert vmlogrdr printks to pr_xxx macros.
  [S390] convert zfcp dumper printks to pr_xxx macros.
  [S390] convert cpu related printks to pr_xxx macros.
  [S390] convert qeth printks to dev_xxx and pr_xxx macros.
  [S390] convert sclp printks to pr_xxx macros.
  [S390] convert iucv printks to dev_xxx and pr_xxx macros.
  [S390] convert ap_bus printks to pr_xxx macros.
  [S390] convert dcssblk and extmem printks messages to pr_xxx macros.
  [S390] convert monwriter printks to pr_xxx macros.
  [S390] convert s390 debug feature printks to pr_xxx macros.
  [S390] convert monreader printks to pr_xxx macros.
  [S390] convert appldata printks to pr_xxx macros.
  [S390] convert setup printks to pr_xxx macros.
  [S390] convert hypfs printks to pr_xxx macros.
  [S390] convert time printks to pr_xxx macros.
  [S390] convert cpacf printks to pr_xxx macros.
  [S390] convert cio printks to pr_xxx macros.
  ...
This commit is contained in:
Linus Torvalds 2008-12-28 12:33:21 -08:00
commit 1db2a5c11e
143 changed files with 4885 additions and 2309 deletions
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11
Documentation/kernel-parameters.txt
View file

@ -823,6 +823,9 @@ and is between 256 and 4096 characters. It is defined in the file
hlt [BUGS=ARM,SH]
hvc_iucv= [S390] Number of z/VM IUCV Hypervisor console (HVC)
back-ends. Valid parameters: 0..8
i8042.debug [HW] Toggle i8042 debug mode
i8042.direct [HW] Put keyboard port into non-translated mode
i8042.dumbkbd [HW] Pretend that controller can only read data from
@ -2292,6 +2295,14 @@ and is between 256 and 4096 characters. It is defined in the file
See comment before function dc390_setup() in
drivers/scsi/tmscsim.c.
topology= [S390]
Format: {off | on}
Specify if the kernel should make use of the cpu
topology informations if the hardware supports these.
The scheduler will make use of these informations and
e.g. base its process migration decisions on it.
Default is off.
tp720= [HW,PS2]
trix= [HW,OSS] MediaTrix AudioTrix Pro

2
arch/powerpc/include/asm/elf.h
View file

@ -267,7 +267,7 @@ extern int ucache_bsize;
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
struct linux_binprm;
extern int arch_setup_additional_pages(struct linux_binprm *bprm,
int executable_stack);
int uses_interp);
#define VDSO_AUX_ENT(a,b) NEW_AUX_ENT(a,b);
#endif /* __KERNEL__ */

3
arch/powerpc/kernel/vdso.c
View file

@ -184,8 +184,7 @@ static void dump_vdso_pages(struct vm_area_struct * vma)
* This is called from binfmt_elf, we create the special vma for the
* vDSO and insert it into the mm struct tree
*/
int arch_setup_additional_pages(struct linux_binprm *bprm,
int executable_stack)
int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
{
struct mm_struct *mm = current->mm;
struct page **vdso_pagelist;

41
arch/s390/Kconfig
View file

@ -43,6 +43,9 @@ config GENERIC_HWEIGHT
config GENERIC_TIME
def_bool y
config GENERIC_TIME_VSYSCALL
def_bool y
config GENERIC_CLOCKEVENTS
def_bool y
@ -66,10 +69,15 @@ config PGSTE
bool
default y if KVM
config VIRT_CPU_ACCOUNTING
def_bool y
mainmenu "Linux Kernel Configuration"
config S390
def_bool y
select USE_GENERIC_SMP_HELPERS if SMP
select HAVE_FUNCTION_TRACER
select HAVE_OPROFILE
select HAVE_KPROBES
select HAVE_KRETPROBES
@ -225,6 +233,14 @@ config MARCH_Z9_109
Class (z9 BC). The kernel will be slightly faster but will not
work on older machines such as the z990, z890, z900, and z800.
config MARCH_Z10
bool "IBM System z10"
help
Select this to enable optimizations for IBM System z10. The
kernel will be slightly faster but will not work on older
machines such as the z990, z890, z900, z800, z9-109, z9-ec
and z9-bc.
endchoice
config PACK_STACK
@ -343,16 +359,6 @@ config QDIO
If unsure, say Y.
config QDIO_DEBUG
bool "Extended debugging information"
depends on QDIO
help
Say Y here to get extended debugging output in
/sys/kernel/debug/s390dbf/qdio...
Warning: this option reduces the performance of the QDIO module.
If unsure, say N.
config CHSC_SCH
tristate "Support for CHSC subchannels"
help
@ -466,22 +472,9 @@ config PAGE_STATES
hypervisor. The ESSA instruction is used to do the states
changes between a page that has content and the unused state.
config VIRT_TIMER
bool "Virtual CPU timer support"
help
This provides a kernel interface for virtual CPU timers.
Default is disabled.
config VIRT_CPU_ACCOUNTING
bool "Base user process accounting on virtual cpu timer"
depends on VIRT_TIMER
help
Select this option to use CPU timer deltas to do user
process accounting.
config APPLDATA_BASE
bool "Linux - VM Monitor Stream, base infrastructure"
depends on PROC_FS && VIRT_TIMER=y
depends on PROC_FS
help
This provides a kernel interface for creating and updating z/VM APPLDATA
monitor records. The monitor records are updated at certain time

1
arch/s390/Makefile
View file

@ -34,6 +34,7 @@ cflags-$(CONFIG_MARCH_G5) += $(call cc-option,-march=g5)
cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900)
cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)
cflags-$(CONFIG_MARCH_Z9_109) += $(call cc-option,-march=z9-109)
cflags-$(CONFIG_MARCH_Z10) += $(call cc-option,-march=z10)
#KBUILD_IMAGE is necessary for make rpm
KBUILD_IMAGE :=arch/s390/boot/image

4
arch/s390/appldata/appldata.h
View file

@ -26,10 +26,6 @@
#define CTL_APPLDATA_NET_SUM 2125
#define CTL_APPLDATA_PROC 2126
#define P_INFO(x...) printk(KERN_INFO MY_PRINT_NAME " info: " x)
#define P_ERROR(x...) printk(KERN_ERR MY_PRINT_NAME " error: " x)
#define P_WARNING(x...) printk(KERN_WARNING MY_PRINT_NAME " status: " x)
struct appldata_ops {
struct list_head list;
struct ctl_table_header *sysctl_header;

12
arch/s390/appldata/appldata_base.c
View file

@ -10,6 +10,9 @@
* Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
*/
#define KMSG_COMPONENT "appldata"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
@ -32,7 +35,6 @@
#include "appldata.h"
#define MY_PRINT_NAME "appldata" /* for debug messages, etc. */
#define APPLDATA_CPU_INTERVAL 10000 /* default (CPU) time for
sampling interval in
milliseconds */
@ -390,8 +392,8 @@ appldata_generic_handler(ctl_table *ctl, int write, struct file *filp,
(unsigned long) ops->data, ops->size,
ops->mod_lvl);
if (rc != 0) {
P_ERROR("START DIAG 0xDC for %s failed, "
"return code: %d\n", ops->name, rc);
pr_err("Starting the data collection for %s "
"failed with rc=%d\n", ops->name, rc);
module_put(ops->owner);
} else
ops->active = 1;
@ -401,8 +403,8 @@ appldata_generic_handler(ctl_table *ctl, int write, struct file *filp,
(unsigned long) ops->data, ops->size,
ops->mod_lvl);
if (rc != 0)
P_ERROR("STOP DIAG 0xDC for %s failed, "
"return code: %d\n", ops->name, rc);
pr_err("Stopping the data collection for %s "
"failed with rc=%d\n", ops->name, rc);
module_put(ops->owner);
}
spin_unlock(&appldata_ops_lock);

21
arch/s390/appldata/appldata_os.c
View file

@ -9,6 +9,9 @@
* Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
*/
#define KMSG_COMPONENT "appldata"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
@ -22,7 +25,6 @@
#include "appldata.h"
#define MY_PRINT_NAME "appldata_os" /* for debug messages, etc. */
#define LOAD_INT(x) ((x) >> FSHIFT)
#define LOAD_FRAC(x) LOAD_INT(((x) & (FIXED_1-1)) * 100)
@ -143,21 +145,16 @@ static void appldata_get_os_data(void *data)
(unsigned long) ops.data, new_size,
ops.mod_lvl);
if (rc != 0)
P_ERROR("os: START NEW DIAG 0xDC failed, "
"return code: %d, new size = %i\n", rc,
new_size);
pr_err("Starting a new OS data collection "
"failed with rc=%d\n", rc);
rc = appldata_diag(APPLDATA_RECORD_OS_ID,
APPLDATA_STOP_REC,
(unsigned long) ops.data, ops.size,
ops.mod_lvl);
if (rc != 0)
P_ERROR("os: STOP OLD DIAG 0xDC failed, "
"return code: %d, old size = %i\n", rc,
ops.size);
else
P_INFO("os: old record size = %i stopped\n",
ops.size);
pr_err("Stopping a faulty OS data "
"collection failed with rc=%d\n", rc);
}
ops.size = new_size;
}
@ -178,8 +175,8 @@ static int __init appldata_os_init(void)
max_size = sizeof(struct appldata_os_data) +
(NR_CPUS * sizeof(struct appldata_os_per_cpu));
if (max_size > APPLDATA_MAX_REC_SIZE) {
P_ERROR("Max. size of OS record = %i, bigger than maximum "
"record size (%i)\n", max_size, APPLDATA_MAX_REC_SIZE);
pr_err("Maximum OS record size %i exceeds the maximum "
"record size %i\n", max_size, APPLDATA_MAX_REC_SIZE);
rc = -ENOMEM;
goto out;
}

14
arch/s390/crypto/aes_s390.c
View file

@ -17,6 +17,9 @@
*
*/
#define KMSG_COMPONENT "aes_s390"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <crypto/aes.h>
#include <crypto/algapi.h>
#include <linux/err.h>
@ -169,7 +172,8 @@ static int fallback_init_cip(struct crypto_tfm *tfm)
CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(sctx->fallback.cip)) {
printk(KERN_ERR "Error allocating fallback algo %s\n", name);
pr_err("Allocating AES fallback algorithm %s failed\n",
name);
return PTR_ERR(sctx->fallback.blk);
}
@ -349,7 +353,8 @@ static int fallback_init_blk(struct crypto_tfm *tfm)
CRYPTO_ALG_ASYNC | CRYPTO_ALG_NEED_FALLBACK);
if (IS_ERR(sctx->fallback.blk)) {
printk(KERN_ERR "Error allocating fallback algo %s\n", name);
pr_err("Allocating AES fallback algorithm %s failed\n",
name);
return PTR_ERR(sctx->fallback.blk);
}
@ -515,9 +520,8 @@ static int __init aes_s390_init(void)
/* z9 109 and z9 BC/EC only support 128 bit key length */
if (keylen_flag == AES_KEYLEN_128)
printk(KERN_INFO
"aes_s390: hardware acceleration only available for "
"128 bit keys\n");
pr_info("AES hardware acceleration is only available for"
" 128-bit keys\n");
ret = crypto_register_alg(&aes_alg);
if (ret)

10
arch/s390/hypfs/hypfs_diag.c
View file

@ -3,10 +3,13 @@
* Hypervisor filesystem for Linux on s390. Diag 204 and 224
* implementation.
*
* Copyright (C) IBM Corp. 2006
* Copyright IBM Corp. 2006, 2008
* Author(s): Michael Holzheu <holzheu@de.ibm.com>
*/
#define KMSG_COMPONENT "hypfs"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/string.h>
@ -527,13 +530,14 @@ __init int hypfs_diag_init(void)
int rc;
if (diag204_probe()) {
printk(KERN_ERR "hypfs: diag 204 not working.");
pr_err("The hardware system does not support hypfs\n");
return -ENODATA;
}
rc = diag224_get_name_table();
if (rc) {
diag204_free_buffer();
printk(KERN_ERR "hypfs: could not get name table.\n");
pr_err("The hardware system does not provide all "
"functions required by hypfs\n");
}
return rc;
}

14
arch/s390/hypfs/inode.c
View file

@ -2,10 +2,13 @@
* arch/s390/hypfs/inode.c
* Hypervisor filesystem for Linux on s390.
*
* Copyright (C) IBM Corp. 2006
* Copyright IBM Corp. 2006, 2008
* Author(s): Michael Holzheu <holzheu@de.ibm.com>
*/
#define KMSG_COMPONENT "hypfs"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/fs.h>
@ -200,7 +203,7 @@ static ssize_t hypfs_aio_write(struct kiocb *iocb, const struct iovec *iov,
else
rc = hypfs_diag_create_files(sb, sb->s_root);
if (rc) {
printk(KERN_ERR "hypfs: Update failed\n");
pr_err("Updating the hypfs tree failed\n");
hypfs_delete_tree(sb->s_root);
goto out;
}
@ -252,8 +255,7 @@ static int hypfs_parse_options(char *options, struct super_block *sb)
break;
case opt_err:
default:
printk(KERN_ERR "hypfs: Unrecognized mount option "
"\"%s\" or missing value\n", str);
pr_err("%s is not a valid mount option\n", str);
return -EINVAL;
}
}
@ -317,7 +319,7 @@ static int hypfs_fill_super(struct super_block *sb, void *data, int silent)
}
hypfs_update_update(sb);
sb->s_root = root_dentry;
printk(KERN_INFO "hypfs: Hypervisor filesystem mounted\n");
pr_info("Hypervisor filesystem mounted\n");
return 0;
err_tree:
@ -513,7 +515,7 @@ fail_sysfs:
if (!MACHINE_IS_VM)
hypfs_diag_exit();
fail_diag:
printk(KERN_ERR "hypfs: Initialization failed with rc = %i.\n", rc);
pr_err("Initialization of hypfs failed with rc=%i\n", rc);
return rc;
}

2
arch/s390/include/asm/auxvec.h
View file

@ -1,4 +1,6 @@
#ifndef __ASMS390_AUXVEC_H
#define __ASMS390_AUXVEC_H
#define AT_SYSINFO_EHDR 33
#endif

5
arch/s390/include/asm/bug.h
View file

@ -47,7 +47,10 @@
#endif /* CONFIG_DEBUG_BUGVERBOSE */
#define BUG() __EMIT_BUG(0)
#define BUG() do { \
__EMIT_BUG(0); \
for (;;); \
} while (0)
#define WARN_ON(x) ({ \
int __ret_warn_on = !!(x); \

72
arch/s390/include/asm/byteorder.h
View file

@ -11,32 +11,39 @@
#include <asm/types.h>
#ifdef __GNUC__
#define __BIG_ENDIAN
#ifndef __s390x__
# define __SWAB_64_THRU_32__
#endif
#ifdef __s390x__
static inline __u64 ___arch__swab64p(const __u64 *x)
static inline __u64 __arch_swab64p(const __u64 *x)
{
__u64 result;
asm volatile("lrvg %0,%1" : "=d" (result) : "m" (*x));
return result;
}
#define __arch_swab64p __arch_swab64p
static inline __u64 ___arch__swab64(__u64 x)
static inline __u64 __arch_swab64(__u64 x)
{
__u64 result;
asm volatile("lrvgr %0,%1" : "=d" (result) : "d" (x));
return result;
}
#define __arch_swab64 __arch_swab64
static inline void ___arch__swab64s(__u64 *x)
static inline void __arch_swab64s(__u64 *x)
{
*x = ___arch__swab64p(x);
*x = __arch_swab64p(x);
}
#define __arch_swab64s __arch_swab64s
#endif /* __s390x__ */
static inline __u32 ___arch__swab32p(const __u32 *x)
static inline __u32 __arch_swab32p(const __u32 *x)
{
__u32 result;
@ -53,25 +60,20 @@ static inline __u32 ___arch__swab32p(const __u32 *x)
#endif /* __s390x__ */
return result;
}
#define __arch_swab32p __arch_swab32p
static inline __u32 ___arch__swab32(__u32 x)
#ifdef __s390x__
static inline __u32 __arch_swab32(__u32 x)
{
#ifndef __s390x__
return ___arch__swab32p(&x);
#else /* __s390x__ */
__u32 result;
asm volatile("lrvr %0,%1" : "=d" (result) : "d" (x));
return result;
}
#define __arch_swab32 __arch_swab32
#endif /* __s390x__ */
}
static __inline__ void ___arch__swab32s(__u32 *x)
{
*x = ___arch__swab32p(x);
}
static __inline__ __u16 ___arch__swab16p(const __u16 *x)
static inline __u16 __arch_swab16p(const __u16 *x)
{
__u16 result;
@ -86,40 +88,8 @@ static __inline__ __u16 ___arch__swab16p(const __u16 *x)
#endif /* __s390x__ */
return result;
}
#define __arch_swab16p __arch_swab16p
static __inline__ __u16 ___arch__swab16(__u16 x)
{
return ___arch__swab16p(&x);
}
static __inline__ void ___arch__swab16s(__u16 *x)
{
*x = ___arch__swab16p(x);
}
#ifdef __s390x__
#define __arch__swab64(x) ___arch__swab64(x)
#define __arch__swab64p(x) ___arch__swab64p(x)
#define __arch__swab64s(x) ___arch__swab64s(x)
#endif /* __s390x__ */
#define __arch__swab32(x) ___arch__swab32(x)
#define __arch__swab16(x) ___arch__swab16(x)
#define __arch__swab32p(x) ___arch__swab32p(x)
#define __arch__swab16p(x) ___arch__swab16p(x)
#define __arch__swab32s(x) ___arch__swab32s(x)
#define __arch__swab16s(x) ___arch__swab16s(x)
#ifndef __s390x__
#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
# define __BYTEORDER_HAS_U64__
# define __SWAB_64_THRU_32__
#endif
#else /* __s390x__ */
#define __BYTEORDER_HAS_U64__
#endif /* __s390x__ */
#endif /* __GNUC__ */
#include <linux/byteorder/big_endian.h>
#include <linux/byteorder.h>
#endif /* _S390_BYTEORDER_H */

16
arch/s390/include/asm/elf.h
View file

@ -120,6 +120,10 @@ typedef s390_compat_regs compat_elf_gregset_t;
#include <asm/system.h> /* for save_access_regs */
#include <asm/mmu_context.h>
#include <asm/vdso.h>
extern unsigned int vdso_enabled;
/*
* This is used to ensure we don't load something for the wrong architecture.
*/
@ -191,4 +195,16 @@ do { \
current->mm->context.noexec == 0; \
})
#define ARCH_DLINFO \
do { \
if (vdso_enabled) \
NEW_AUX_ENT(AT_SYSINFO_EHDR, \
(unsigned long)current->mm->context.vdso_base); \
} while (0)
struct linux_binprm;
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
int arch_setup_additional_pages(struct linux_binprm *, int);
#endif

4
arch/s390/include/asm/fcx.h
View file

@ -248,8 +248,8 @@ struct dcw {
#define TCCB_MAX_SIZE (sizeof(struct tccb_tcah) + \
TCCB_MAX_DCW * sizeof(struct dcw) + \
sizeof(struct tccb_tcat))
#define TCCB_SAC_DEFAULT 0xf901
#define TCCB_SAC_INTRG 0xf902
#define TCCB_SAC_DEFAULT 0x1ffe
#define TCCB_SAC_INTRG 0x1fff
/**
* struct tccb_tcah - Transport-Command-Area Header (TCAH)

8
arch/s390/include/asm/ftrace.h Normal file
View file

@ -0,0 +1,8 @@
#ifndef _ASM_S390_FTRACE_H
#define _ASM_S390_FTRACE_H
#ifndef __ASSEMBLY__
extern void _mcount(void);
#endif
#endif /* _ASM_S390_FTRACE_H */

1
arch/s390/include/asm/isc.h
View file

@ -17,6 +17,7 @@
#define CHSC_SCH_ISC 7 /* CHSC subchannels */
/* Adapter interrupts. */
#define QDIO_AIRQ_ISC IO_SCH_ISC /* I/O subchannel in qdio mode */
#define AP_ISC 6 /* adjunct processor (crypto) devices */
/* Functions for registration of I/O interruption subclasses */
void isc_register(unsigned int isc);

1
arch/s390/include/asm/mmu.h
View file

@ -6,6 +6,7 @@ typedef struct {
struct list_head pgtable_list;
unsigned long asce_bits;
unsigned long asce_limit;
unsigned long vdso_base;
int noexec;
int has_pgste; /* The mmu context has extended page tables */
int alloc_pgste; /* cloned contexts will have extended page tables */

2
arch/s390/include/asm/page.h
View file

@ -152,4 +152,6 @@ void arch_alloc_page(struct page *page, int order);
#include <asm-generic/memory_model.h>
#include <asm-generic/page.h>
#define __HAVE_ARCH_GATE_AREA 1
#endif /* _S390_PAGE_H */

5
arch/s390/include/asm/pgalloc.h
View file

@ -28,6 +28,8 @@ void disable_noexec(struct mm_struct *, struct task_struct *);
static inline void clear_table(unsigned long *s, unsigned long val, size_t n)
{
typedef struct { char _[n]; } addrtype;
*s = val;
n = (n / 256) - 1;
asm volatile(
@ -39,7 +41,8 @@ static inline void clear_table(unsigned long *s, unsigned long val, size_t n)
"0: mvc 256(256,%0),0(%0)\n"
" la %0,256(%0)\n"
" brct %1,0b\n"
: "+a" (s), "+d" (n));
: "+a" (s), "+d" (n), "=m" (*(addrtype *) s)
: "m" (*(addrtype *) s));
}
static inline void crst_table_init(unsigned long *crst, unsigned long entry)

4
arch/s390/include/asm/processor.h
View file

@ -13,6 +13,7 @@
#ifndef __ASM_S390_PROCESSOR_H
#define __ASM_S390_PROCESSOR_H
#include <linux/linkage.h>
#include <asm/ptrace.h>
#ifdef __KERNEL__
@ -258,7 +259,7 @@ static inline void enabled_wait(void)
* Function to drop a processor into disabled wait state
*/
static inline void disabled_wait(unsigned long code)
static inline void ATTRIB_NORET disabled_wait(unsigned long code)
{
unsigned long ctl_buf;
psw_t dw_psw;
@ -322,6 +323,7 @@ static inline void disabled_wait(unsigned long code)
: "=m" (ctl_buf)
: "a" (&dw_psw), "a" (&ctl_buf), "m" (dw_psw) : "cc", "0");
#endif /* __s390x__ */
while (1);
}
/*

16
arch/s390/include/asm/qdio.h
View file

@ -373,16 +373,16 @@ struct qdio_initialize {
#define QDIO_FLAG_SYNC_OUTPUT 0x02
#define QDIO_FLAG_PCI_OUT 0x10
extern int qdio_initialize(struct qdio_initialize *init_data);
extern int qdio_allocate(struct qdio_initialize *init_data);
extern int qdio_establish(struct qdio_initialize *init_data);
extern int qdio_initialize(struct qdio_initialize *);
extern int qdio_allocate(struct qdio_initialize *);
extern int qdio_establish(struct qdio_initialize *);
extern int qdio_activate(struct ccw_device *);
extern int do_QDIO(struct ccw_device*, unsigned int flags,
int q_nr, int qidx, int count);
extern int qdio_cleanup(struct ccw_device*, int how);
extern int qdio_shutdown(struct ccw_device*, int how);
extern int do_QDIO(struct ccw_device *cdev, unsigned int callflags,
int q_nr, int bufnr, int count);
extern int qdio_cleanup(struct ccw_device*, int);
extern int qdio_shutdown(struct ccw_device*, int);
extern int qdio_free(struct ccw_device *);
extern struct qdio_ssqd_desc *qdio_get_ssqd_desc(struct ccw_device *cdev);
extern int qdio_get_ssqd_desc(struct ccw_device *dev, struct qdio_ssqd_desc*);
#endif /* __QDIO_H__ */

1
arch/s390/include/asm/sigp.h
View file

@ -61,6 +61,7 @@ typedef enum
{
ec_schedule=0,
ec_call_function,
ec_call_function_single,
ec_bit_last
} ec_bit_sig;

5
arch/s390/include/asm/smp.h
View file

@ -91,8 +91,9 @@ extern int __cpu_up (unsigned int cpu);
extern struct mutex smp_cpu_state_mutex;
extern int smp_cpu_polarization[];
extern int smp_call_function_mask(cpumask_t mask, void (*func)(void *),
void *info, int wait);
extern void arch_send_call_function_single_ipi(int cpu);
extern void arch_send_call_function_ipi(cpumask_t mask);
#endif
#ifndef CONFIG_SMP

11
arch/s390/include/asm/sysinfo.h
View file

@ -118,4 +118,15 @@ static inline int stsi(void *sysinfo, int fc, int sel1, int sel2)
return r0;
}
/*
* Service level reporting interface.
*/
struct service_level {
struct list_head list;
void (*seq_print)(struct seq_file *, struct service_level *);
};
int register_service_level(struct service_level *);
int unregister_service_level(struct service_level *);
#endif /* __ASM_S390_SYSINFO_H */

24
arch/s390/include/asm/system.h
View file

@ -12,6 +12,7 @@
#define __ASM_SYSTEM_H
#include <linux/kernel.h>
#include <linux/errno.h>
#include <asm/types.h>
#include <asm/ptrace.h>
#include <asm/setup.h>
@ -98,13 +99,9 @@ static inline void restore_access_regs(unsigned int *acrs)
prev = __switch_to(prev,next); \
} while (0)
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
extern void account_vtime(struct task_struct *);
extern void account_tick_vtime(struct task_struct *);
extern void account_system_vtime(struct task_struct *);
#else
#define account_vtime(x) do { /* empty */ } while (0)
#endif
#ifdef CONFIG_PFAULT
extern void pfault_irq_init(void);
@ -413,8 +410,6 @@ __set_psw_mask(unsigned long mask)
#define local_mcck_enable() __set_psw_mask(psw_kernel_bits)
#define local_mcck_disable() __set_psw_mask(psw_kernel_bits & ~PSW_MASK_MCHECK)
int stfle(unsigned long long *list, int doublewords);
#ifdef CONFIG_SMP
extern void smp_ctl_set_bit(int cr, int bit);
@ -438,6 +433,23 @@ static inline unsigned int stfl(void)
return S390_lowcore.stfl_fac_list;
}
static inline int __stfle(unsigned long long *list, int doublewords)
{
typedef struct { unsigned long long _[doublewords]; } addrtype;
register unsigned long __nr asm("0") = doublewords - 1;
asm volatile(".insn s,0xb2b00000,%0" /* stfle */
: "=m" (*(addrtype *) list), "+d" (__nr) : : "cc");
return __nr + 1;
}
static inline int stfle(unsigned long long *list, int doublewords)
{
if (!(stfl() & (1UL << 24)))
return -EOPNOTSUPP;
return __stfle(list, doublewords);
}
static inline unsigned short stap(void)
{
unsigned short cpu_address;

9
arch/s390/include/asm/timer.h
View file

@ -48,18 +48,9 @@ extern int del_virt_timer(struct vtimer_list *timer);
extern void init_cpu_vtimer(void);
extern void vtime_init(void);
#ifdef CONFIG_VIRT_TIMER
extern void vtime_start_cpu_timer(void);
extern void vtime_stop_cpu_timer(void);
#else
static inline void vtime_start_cpu_timer(void) { }
static inline void vtime_stop_cpu_timer(void) { }
#endif /* CONFIG_VIRT_TIMER */
#endif /* __KERNEL__ */
#endif /* _ASM_S390_TIMER_H */

39
arch/s390/include/asm/vdso.h Normal file
View file

@ -0,0 +1,39 @@
#ifndef __S390_VDSO_H__
#define __S390_VDSO_H__
#ifdef __KERNEL__
/* Default link addresses for the vDSOs */
#define VDSO32_LBASE 0
#define VDSO64_LBASE 0
#define VDSO_VERSION_STRING LINUX_2.6.26
#ifndef __ASSEMBLY__
/*
* Note about this structure:
*
* NEVER USE THIS IN USERSPACE CODE DIRECTLY. The layout of this
* structure is supposed to be known only to the function in the vdso
* itself and may change without notice.
*/
struct vdso_data {
__u64 tb_update_count; /* Timebase atomicity ctr 0x00 */
__u64 xtime_tod_stamp; /* TOD clock for xtime 0x08 */
__u64 xtime_clock_sec; /* Kernel time 0x10 */
__u64 xtime_clock_nsec; /* 0x18 */
__u64 wtom_clock_sec; /* Wall to monotonic clock 0x20 */
__u64 wtom_clock_nsec; /* 0x28 */
__u32 tz_minuteswest; /* Minutes west of Greenwich 0x30 */
__u32 tz_dsttime; /* Type of dst correction 0x34 */
};
extern struct vdso_data *vdso_data;
#endif /* __ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* __S390_VDSO_H__ */

18
arch/s390/kernel/Makefile
View file

@ -2,6 +2,11 @@
# Makefile for the linux kernel.
#
ifdef CONFIG_FUNCTION_TRACER
# Do not trace early boot code
CFLAGS_REMOVE_early.o = -pg
endif
#
# Passing null pointers is ok for smp code, since we access the lowcore here.
#
@ -12,9 +17,10 @@ CFLAGS_smp.o := -Wno-nonnull
#
CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
obj-y := bitmap.o traps.o time.o process.o base.o early.o \
setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
s390_ext.o debug.o irq.o ipl.o dis.o diag.o mem_detect.o
obj-y := bitmap.o traps.o time.o process.o base.o early.o setup.o \
processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \
s390_ext.o debug.o irq.o ipl.o dis.o diag.o mem_detect.o \
vdso.o vtime.o
obj-y += $(if $(CONFIG_64BIT),entry64.o,entry.o)
obj-y += $(if $(CONFIG_64BIT),reipl64.o,reipl.o)
@ -30,12 +36,16 @@ obj-$(CONFIG_COMPAT) += compat_linux.o compat_signal.o \
compat_wrapper.o compat_exec_domain.o \
$(compat-obj-y)
obj-$(CONFIG_VIRT_TIMER) += vtime.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-$(CONFIG_KPROBES) += kprobes.o
obj-$(CONFIG_FUNCTION_TRACER) += mcount.o
# Kexec part
S390_KEXEC_OBJS := machine_kexec.o crash.o
S390_KEXEC_OBJS += $(if $(CONFIG_64BIT),relocate_kernel64.o,relocate_kernel.o)
obj-$(CONFIG_KEXEC) += $(S390_KEXEC_OBJS)
# vdso
obj-$(CONFIG_64BIT) += vdso64/
obj-$(CONFIG_32BIT) += vdso32/
obj-$(CONFIG_COMPAT) += vdso32/

15
arch/s390/kernel/asm-offsets.c
View file

@ -6,6 +6,7 @@
#include <linux/sched.h>
#include <linux/kbuild.h>
#include <asm/vdso.h>
int main(void)
{
@ -38,5 +39,19 @@ int main(void)
DEFINE(__SF_BACKCHAIN, offsetof(struct stack_frame, back_chain));
DEFINE(__SF_GPRS, offsetof(struct stack_frame, gprs));
DEFINE(__SF_EMPTY, offsetof(struct stack_frame, empty1));
BLANK();
/* timeval/timezone offsets for use by vdso */
DEFINE(__VDSO_UPD_COUNT, offsetof(struct vdso_data, tb_update_count));
DEFINE(__VDSO_XTIME_STAMP, offsetof(struct vdso_data, xtime_tod_stamp));
DEFINE(__VDSO_XTIME_SEC, offsetof(struct vdso_data, xtime_clock_sec));
DEFINE(__VDSO_XTIME_NSEC, offsetof(struct vdso_data, xtime_clock_nsec));
DEFINE(__VDSO_WTOM_SEC, offsetof(struct vdso_data, wtom_clock_sec));
DEFINE(__VDSO_WTOM_NSEC, offsetof(struct vdso_data, wtom_clock_nsec));
DEFINE(__VDSO_TIMEZONE, offsetof(struct vdso_data, tz_minuteswest));
/* constants used by the vdso */
DEFINE(CLOCK_REALTIME, CLOCK_REALTIME);
DEFINE(CLOCK_MONOTONIC, CLOCK_MONOTONIC);
DEFINE(CLOCK_REALTIME_RES, MONOTONIC_RES_NSEC);
return 0;
}

7
arch/s390/kernel/cpcmd.c
View file

@ -7,6 +7,9 @@
* Christian Borntraeger (cborntra@de.ibm.com),
*/
#define KMSG_COMPONENT "cpcmd"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
@ -104,8 +107,8 @@ int cpcmd(const char *cmd, char *response, int rlen, int *response_code)
(((unsigned long)response + rlen) >> 31)) {
lowbuf = kmalloc(rlen, GFP_KERNEL | GFP_DMA);
if (!lowbuf) {
printk(KERN_WARNING
"cpcmd: could not allocate response buffer\n");
pr_warning("The cpcmd kernel function failed to "
"allocate a response buffer\n");
return -ENOMEM;
}
spin_lock_irqsave(&cpcmd_lock, flags);

39
arch/s390/kernel/debug.c
View file

@ -10,6 +10,9 @@
* Bugreports to: <Linux390@de.ibm.com>
*/
#define KMSG_COMPONENT "s390dbf"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/stddef.h>
#include <linux/kernel.h>
#include <linux/errno.h>
@ -388,7 +391,7 @@ debug_info_copy(debug_info_t* in, int mode)
debug_info_free(rc);
} while (1);
if(!rc || (mode == NO_AREAS))
if (mode == NO_AREAS)
goto out;
for(i = 0; i < in->nr_areas; i++){
@ -693,8 +696,8 @@ debug_info_t *debug_register_mode(const char *name, int pages_per_area,
/* Since debugfs currently does not support uid/gid other than root, */
/* we do not allow gid/uid != 0 until we get support for that. */
if ((uid != 0) || (gid != 0))
printk(KERN_WARNING "debug: Warning - Currently only uid/gid "
"= 0 are supported. Using root as owner now!");
pr_warning("Root becomes the owner of all s390dbf files "
"in sysfs\n");
if (!initialized)
BUG();
mutex_lock(&debug_mutex);
@ -709,7 +712,7 @@ debug_info_t *debug_register_mode(const char *name, int pages_per_area,
debug_register_view(rc, &debug_pages_view);
out:
if (!rc){
printk(KERN_ERR "debug: debug_register failed for %s\n",name);
pr_err("Registering debug feature %s failed\n", name);
}
mutex_unlock(&debug_mutex);
return rc;
@ -763,8 +766,8 @@ debug_set_size(debug_info_t* id, int nr_areas, int pages_per_area)
if(pages_per_area > 0){
new_areas = debug_areas_alloc(pages_per_area, nr_areas);
if(!new_areas) {
printk(KERN_WARNING "debug: could not allocate memory "\
"for pagenumber: %i\n",pages_per_area);
pr_info("Allocating memory for %i pages failed\n",
pages_per_area);
rc = -ENOMEM;
goto out;
}
@ -780,8 +783,7 @@ debug_set_size(debug_info_t* id, int nr_areas, int pages_per_area)
memset(id->active_entries,0,sizeof(int)*id->nr_areas);
memset(id->active_pages, 0, sizeof(int)*id->nr_areas);
spin_unlock_irqrestore(&id->lock,flags);
printk(KERN_INFO "debug: %s: set new size (%i pages)\n"\
,id->name, pages_per_area);
pr_info("%s: set new size (%i pages)\n" ,id->name, pages_per_area);
out:
return rc;
}
@ -800,10 +802,9 @@ debug_set_level(debug_info_t* id, int new_level)
spin_lock_irqsave(&id->lock,flags);
if(new_level == DEBUG_OFF_LEVEL){
id->level = DEBUG_OFF_LEVEL;
printk(KERN_INFO "debug: %s: switched off\n",id->name);
pr_info("%s: switched off\n",id->name);
} else if ((new_level > DEBUG_MAX_LEVEL) || (new_level < 0)) {
printk(KERN_INFO
"debug: %s: level %i is out of range (%i - %i)\n",
pr_info("%s: level %i is out of range (%i - %i)\n",
id->name, new_level, 0, DEBUG_MAX_LEVEL);
} else {
id->level = new_level;
@ -1108,8 +1109,8 @@ debug_register_view(debug_info_t * id, struct debug_view *view)
pde = debugfs_create_file(view->name, mode, id->debugfs_root_entry,
id , &debug_file_ops);
if (!pde){
printk(KERN_WARNING "debug: debugfs_create_file() failed!"\
" Cannot register view %s/%s\n", id->name,view->name);
pr_err("Registering view %s/%s failed due to out of "
"memory\n", id->name,view->name);
rc = -1;
goto out;
}
@ -1119,10 +1120,8 @@ debug_register_view(debug_info_t * id, struct debug_view *view)
break;
}
if (i == DEBUG_MAX_VIEWS) {
printk(KERN_WARNING "debug: cannot register view %s/%s\n",
id->name,view->name);
printk(KERN_WARNING
"debug: maximum number of views reached (%i)!\n", i);
pr_err("Registering view %s/%s would exceed the maximum "
"number of views %i\n", id->name, view->name, i);
debugfs_remove(pde);
rc = -1;
} else {
@ -1303,7 +1302,8 @@ debug_input_level_fn(debug_info_t * id, struct debug_view *view,
new_level = debug_get_uint(str);
}
if(new_level < 0) {
printk(KERN_INFO "debug: level `%s` is not valid\n", str);
pr_warning("%s is not a valid level for a debug "
"feature\n", str);
rc = -EINVAL;
} else {
debug_set_level(id, new_level);
@ -1380,7 +1380,8 @@ debug_input_flush_fn(debug_info_t * id, struct debug_view *view,
goto out;
}
printk(KERN_INFO "debug: area `%c` is not valid\n", input_buf[0]);
pr_info("Flushing debug data failed because %c is not a valid "
"area\n", input_buf[0]);
out:
*offset += user_len;

58
arch/s390/kernel/entry.S
View file

@ -109,13 +109,6 @@ STACK_SIZE = 1 << STACK_SHIFT
* R15 - kernel stack pointer
*/
.macro STORE_TIMER lc_offset
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
stpt \lc_offset
#endif
.endm
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
.macro UPDATE_VTIME lc_from,lc_to,lc_sum
lm %r10,%r11,\lc_from
sl %r10,\lc_to
@ -128,7 +121,6 @@ STACK_SIZE = 1 << STACK_SHIFT
al %r10,BASED(.Lc_1)
1: stm %r10,%r11,\lc_sum
.endm
#endif
.macro SAVE_ALL_BASE savearea
stm %r12,%r15,\savearea
@ -198,7 +190,7 @@ STACK_SIZE = 1 << STACK_SHIFT
ni \psworg+1,0xfd # clear wait state bit
.endif
lm %r0,%r15,SP_R0(%r15) # load gprs 0-15 of user
STORE_TIMER __LC_EXIT_TIMER
stpt __LC_EXIT_TIMER
lpsw \psworg # back to caller
.endm
@ -247,20 +239,18 @@ __critical_start:
.globl system_call
system_call:
STORE_TIMER __LC_SYNC_ENTER_TIMER
stpt __LC_SYNC_ENTER_TIMER
sysc_saveall:
SAVE_ALL_BASE __LC_SAVE_AREA
SAVE_ALL_SVC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
lh %r7,0x8a # get svc number from lowcore
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
sysc_vtime:
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
sysc_stime:
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
sysc_update:
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
#endif
sysc_do_svc:
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
ltr %r7,%r7 # test for svc 0
@ -436,7 +426,7 @@ ret_from_fork:
basr %r14,%r1
TRACE_IRQS_ON
stosm __SF_EMPTY(%r15),0x03 # reenable interrupts
b BASED(sysc_return)
b BASED(sysc_tracenogo)
#
# kernel_execve function needs to deal with pt_regs that is not
@ -490,20 +480,18 @@ pgm_check_handler:
* we just ignore the PER event (FIXME: is there anything we have to do
* for LPSW?).
*/
STORE_TIMER __LC_SYNC_ENTER_TIMER
stpt __LC_SYNC_ENTER_TIMER
SAVE_ALL_BASE __LC_SAVE_AREA
tm __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception
bnz BASED(pgm_per) # got per exception -> special case
SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(pgm_no_vtime)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
pgm_no_vtime:
#endif
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
l %r3,__LC_PGM_ILC # load program interruption code
@ -536,14 +524,12 @@ pgm_per:
pgm_per_std:
SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(pgm_no_vtime2)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
pgm_no_vtime2:
#endif
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
l %r1,__TI_task(%r9)
@ -565,11 +551,9 @@ pgm_no_vtime2:
pgm_svcper:
SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
#endif
lh %r7,0x8a # get svc number from lowcore
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
@ -599,19 +583,17 @@ kernel_per:
.globl io_int_handler
io_int_handler:
STORE_TIMER __LC_ASYNC_ENTER_TIMER
stpt __LC_ASYNC_ENTER_TIMER
stck __LC_INT_CLOCK
SAVE_ALL_BASE __LC_SAVE_AREA+16
SAVE_ALL_ASYNC __LC_IO_OLD_PSW,__LC_SAVE_AREA+16
CREATE_STACK_FRAME __LC_IO_OLD_PSW,__LC_SAVE_AREA+16
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(io_no_vtime)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
io_no_vtime:
#endif
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
l %r1,BASED(.Ldo_IRQ) # load address of do_IRQ
@ -741,19 +723,17 @@ io_notify_resume:
.globl ext_int_handler
ext_int_handler:
STORE_TIMER __LC_ASYNC_ENTER_TIMER
stpt __LC_ASYNC_ENTER_TIMER
stck __LC_INT_CLOCK
SAVE_ALL_BASE __LC_SAVE_AREA+16
SAVE_ALL_ASYNC __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16
CREATE_STACK_FRAME __LC_EXT_OLD_PSW,__LC_SAVE_AREA+16
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
bz BASED(ext_no_vtime)
UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
ext_no_vtime:
#endif
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
la %r2,SP_PTREGS(%r15) # address of register-save area
@ -776,7 +756,6 @@ mcck_int_handler:
la %r12,__LC_MCK_OLD_PSW
tm __LC_MCCK_CODE,0x80 # system damage?
bo BASED(mcck_int_main) # yes -> rest of mcck code invalid
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
mvc __LC_SAVE_AREA+52(8),__LC_ASYNC_ENTER_TIMER
mvc __LC_ASYNC_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA
tm __LC_MCCK_CODE+5,0x02 # stored cpu timer value valid?
@ -793,9 +772,7 @@ mcck_int_handler:
la %r14,__LC_LAST_UPDATE_TIMER
0: spt 0(%r14)
mvc __LC_ASYNC_ENTER_TIMER(8),0(%r14)
1:
#endif
tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
1: tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
bno BASED(mcck_int_main) # no -> skip cleanup critical
tm __LC_MCK_OLD_PSW+1,0x01 # test problem state bit
bnz BASED(mcck_int_main) # from user -> load async stack
@ -812,7 +789,6 @@ mcck_int_main:
be BASED(0f)
l %r15,__LC_PANIC_STACK # load panic stack
0: CREATE_STACK_FRAME __LC_MCK_OLD_PSW,__LC_SAVE_AREA+32
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm __LC_MCCK_CODE+2,0x08 # mwp of old psw valid?
bno BASED(mcck_no_vtime) # no -> skip cleanup critical
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
@ -821,7 +797,6 @@ mcck_int_main:
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
mcck_no_vtime:
#endif
l %r9,__LC_THREAD_INFO # load pointer to thread_info struct
la %r2,SP_PTREGS(%r15) # load pt_regs
l %r1,BASED(.Ls390_mcck)
@ -843,16 +818,13 @@ mcck_no_vtime:
mcck_return:
mvc __LC_RETURN_MCCK_PSW(8),SP_PSW(%r15) # move return PSW
ni __LC_RETURN_MCCK_PSW+1,0xfd # clear wait state bit
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
mvc __LC_ASYNC_ENTER_TIMER(8),__LC_SAVE_AREA+52
tm __LC_RETURN_MCCK_PSW+1,0x01 # returning to user ?
bno BASED(0f)
lm %r0,%r15,SP_R0(%r15) # load gprs 0-15
stpt __LC_EXIT_TIMER
lpsw __LC_RETURN_MCCK_PSW # back to caller
0:
#endif
lm %r0,%r15,SP_R0(%r15) # load gprs 0-15
0: lm %r0,%r15,SP_R0(%r15) # load gprs 0-15
lpsw __LC_RETURN_MCCK_PSW # back to caller
RESTORE_ALL __LC_RETURN_MCCK_PSW,0
@ -976,13 +948,11 @@ cleanup_system_call:
b BASED(1f)
0: la %r12,__LC_SAVE_AREA+32
1:
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+4)
bh BASED(0f)
mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER
0: clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+8)
bhe BASED(cleanup_vtime)
#endif
clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn)
bh BASED(0f)
mvc __LC_SAVE_AREA(16),0(%r12)
@ -993,7 +963,6 @@ cleanup_system_call:
l %r12,__LC_SAVE_AREA+48 # argh
st %r15,12(%r12)
lh %r7,0x8a
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
cleanup_vtime:
clc __LC_RETURN_PSW+4(4),BASED(cleanup_system_call_insn+12)
bhe BASED(cleanup_stime)
@ -1004,18 +973,15 @@ cleanup_stime:
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
cleanup_update:
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
#endif
mvc __LC_RETURN_PSW+4(4),BASED(cleanup_table_system_call+4)
la %r12,__LC_RETURN_PSW
br %r14
cleanup_system_call_insn:
.long sysc_saveall + 0x80000000
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
.long system_call + 0x80000000
.long sysc_vtime + 0x80000000
.long sysc_stime + 0x80000000
.long sysc_update + 0x80000000
#endif
cleanup_sysc_return:
mvc __LC_RETURN_PSW(4),0(%r12)
@ -1026,11 +992,9 @@ cleanup_sysc_return:
cleanup_sysc_leave:
clc 4(4,%r12),BASED(cleanup_sysc_leave_insn)
be BASED(2f)
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
clc 4(4,%r12),BASED(cleanup_sysc_leave_insn+4)
be BASED(2f)
#endif
mvc __LC_RETURN_PSW(8),SP_PSW(%r15)
c %r12,BASED(.Lmck_old_psw)
bne BASED(0f)
@ -1043,9 +1007,7 @@ cleanup_sysc_leave:
br %r14
cleanup_sysc_leave_insn:
.long sysc_done - 4 + 0x80000000
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
.long sysc_done - 8 + 0x80000000
#endif
cleanup_io_return:
mvc __LC_RETURN_PSW(4),0(%r12)
@ -1056,11 +1018,9 @@ cleanup_io_return:
cleanup_io_leave:
clc 4(4,%r12),BASED(cleanup_io_leave_insn)
be BASED(2f)
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
clc 4(4,%r12),BASED(cleanup_io_leave_insn+4)
be BASED(2f)
#endif
mvc __LC_RETURN_PSW(8),SP_PSW(%r15)
c %r12,BASED(.Lmck_old_psw)
bne BASED(0f)
@ -1073,9 +1033,7 @@ cleanup_io_leave:
br %r14
cleanup_io_leave_insn:
.long io_done - 4 + 0x80000000
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
.long io_done - 8 + 0x80000000
#endif
/*
* Integer constants

58
arch/s390/kernel/entry64.S
View file

@ -96,20 +96,12 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
#define LOCKDEP_SYS_EXIT
#endif
.macro STORE_TIMER lc_offset
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
stpt \lc_offset
#endif
.endm
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
.macro UPDATE_VTIME lc_from,lc_to,lc_sum
lg %r10,\lc_from
slg %r10,\lc_to
alg %r10,\lc_sum
stg %r10,\lc_sum
.endm
#endif
/*
* Register usage in interrupt handlers:
@ -186,7 +178,7 @@ _TIF_WORK_INT = (_TIF_SIGPENDING | _TIF_NOTIFY_RESUME | _TIF_NEED_RESCHED | \
ni \psworg+1,0xfd # clear wait state bit
.endif
lmg %r0,%r15,SP_R0(%r15) # load gprs 0-15 of user
STORE_TIMER __LC_EXIT_TIMER
stpt __LC_EXIT_TIMER
lpswe \psworg # back to caller
.endm
@ -233,20 +225,18 @@ __critical_start:
.globl system_call
system_call:
STORE_TIMER __LC_SYNC_ENTER_TIMER
stpt __LC_SYNC_ENTER_TIMER
sysc_saveall:
SAVE_ALL_BASE __LC_SAVE_AREA
SAVE_ALL_SVC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
llgh %r7,__LC_SVC_INT_CODE # get svc number from lowcore
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
sysc_vtime:
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
sysc_stime:
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
sysc_update:
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
#endif
sysc_do_svc:
lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
ltgr %r7,%r7 # test for svc 0
@ -417,7 +407,7 @@ ret_from_fork:
0: brasl %r14,schedule_tail
TRACE_IRQS_ON
stosm 24(%r15),0x03 # reenable interrupts
j sysc_return
j sysc_tracenogo
#
# kernel_execve function needs to deal with pt_regs that is not
@ -469,20 +459,18 @@ pgm_check_handler:
* we just ignore the PER event (FIXME: is there anything we have to do
* for LPSW?).
*/
STORE_TIMER __LC_SYNC_ENTER_TIMER
stpt __LC_SYNC_ENTER_TIMER
SAVE_ALL_BASE __LC_SAVE_AREA
tm __LC_PGM_INT_CODE+1,0x80 # check whether we got a per exception
jnz pgm_per # got per exception -> special case
SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz pgm_no_vtime
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
pgm_no_vtime:
#endif
lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
mvc SP_ARGS(8,%r15),__LC_LAST_BREAK
TRACE_IRQS_OFF
@ -516,14 +504,12 @@ pgm_per:
pgm_per_std:
SAVE_ALL_SYNC __LC_PGM_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_PGM_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz pgm_no_vtime2
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
pgm_no_vtime2:
#endif
lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
lg %r1,__TI_task(%r9)
@ -545,11 +531,9 @@ pgm_no_vtime2:
pgm_svcper:
SAVE_ALL_SYNC __LC_SVC_OLD_PSW,__LC_SAVE_AREA
CREATE_STACK_FRAME __LC_SVC_OLD_PSW,__LC_SAVE_AREA
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
UPDATE_VTIME __LC_EXIT_TIMER,__LC_SYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
#endif
llgh %r7,__LC_SVC_INT_CODE # get svc number from lowcore
lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
lg %r1,__TI_task(%r9)
@ -575,19 +559,17 @@ kernel_per:
*/
.globl io_int_handler
io_int_handler:
STORE_TIMER __LC_ASYNC_ENTER_TIMER
stpt __LC_ASYNC_ENTER_TIMER
stck __LC_INT_CLOCK
SAVE_ALL_BASE __LC_SAVE_AREA+32
SAVE_ALL_ASYNC __LC_IO_OLD_PSW,__LC_SAVE_AREA+32
CREATE_STACK_FRAME __LC_IO_OLD_PSW,__LC_SAVE_AREA+32
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz io_no_vtime
UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
io_no_vtime:
#endif
lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
la %r2,SP_PTREGS(%r15) # address of register-save area
@ -739,19 +721,17 @@ io_notify_resume:
*/
.globl ext_int_handler
ext_int_handler:
STORE_TIMER __LC_ASYNC_ENTER_TIMER
stpt __LC_ASYNC_ENTER_TIMER
stck __LC_INT_CLOCK
SAVE_ALL_BASE __LC_SAVE_AREA+32
SAVE_ALL_ASYNC __LC_EXT_OLD_PSW,__LC_SAVE_AREA+32
CREATE_STACK_FRAME __LC_EXT_OLD_PSW,__LC_SAVE_AREA+32
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
jz ext_no_vtime
UPDATE_VTIME __LC_EXIT_TIMER,__LC_ASYNC_ENTER_TIMER,__LC_USER_TIMER
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
ext_no_vtime:
#endif
lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
TRACE_IRQS_OFF
la %r2,SP_PTREGS(%r15) # address of register-save area
@ -773,7 +753,6 @@ mcck_int_handler:
la %r12,__LC_MCK_OLD_PSW
tm __LC_MCCK_CODE,0x80 # system damage?
jo mcck_int_main # yes -> rest of mcck code invalid
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
la %r14,4095
mvc __LC_SAVE_AREA+104(8),__LC_ASYNC_ENTER_TIMER
mvc __LC_ASYNC_ENTER_TIMER(8),__LC_CPU_TIMER_SAVE_AREA-4095(%r14)
@ -791,9 +770,7 @@ mcck_int_handler:
la %r14,__LC_LAST_UPDATE_TIMER
0: spt 0(%r14)
mvc __LC_ASYNC_ENTER_TIMER(8),0(%r14)
1:
#endif
tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
1: tm __LC_MCCK_CODE+2,0x09 # mwp + ia of old psw valid?
jno mcck_int_main # no -> skip cleanup critical
tm __LC_MCK_OLD_PSW+1,0x01 # test problem state bit
jnz mcck_int_main # from user -> load kernel stack
@ -809,7 +786,6 @@ mcck_int_main:
jz 0f
lg %r15,__LC_PANIC_STACK # load panic stack
0: CREATE_STACK_FRAME __LC_MCK_OLD_PSW,__LC_SAVE_AREA+64
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
tm __LC_MCCK_CODE+2,0x08 # mwp of old psw valid?
jno mcck_no_vtime # no -> no timer update
tm SP_PSW+1(%r15),0x01 # interrupting from user ?
@ -818,7 +794,6 @@ mcck_int_main:
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
mvc __LC_LAST_UPDATE_TIMER(8),__LC_ASYNC_ENTER_TIMER
mcck_no_vtime:
#endif
lg %r9,__LC_THREAD_INFO # load pointer to thread_info struct
la %r2,SP_PTREGS(%r15) # load pt_regs
brasl %r14,s390_do_machine_check
@ -839,14 +814,11 @@ mcck_return:
mvc __LC_RETURN_MCCK_PSW(16),SP_PSW(%r15) # move return PSW
ni __LC_RETURN_MCCK_PSW+1,0xfd # clear wait state bit
lmg %r0,%r15,SP_R0(%r15) # load gprs 0-15
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
mvc __LC_ASYNC_ENTER_TIMER(8),__LC_SAVE_AREA+104
tm __LC_RETURN_MCCK_PSW+1,0x01 # returning to user ?
jno 0f
stpt __LC_EXIT_TIMER
0:
#endif
lpswe __LC_RETURN_MCCK_PSW # back to caller
0: lpswe __LC_RETURN_MCCK_PSW # back to caller
/*
* Restart interruption handler, kick starter for additional CPUs
@ -964,13 +936,11 @@ cleanup_system_call:
j 1f
0: la %r12,__LC_SAVE_AREA+64
1:
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
clc __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn+8)
jh 0f
mvc __LC_SYNC_ENTER_TIMER(8),__LC_ASYNC_ENTER_TIMER
0: clc __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn+16)
jhe cleanup_vtime
#endif
clc __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn)
jh 0f
mvc __LC_SAVE_AREA(32),0(%r12)
@ -981,7 +951,6 @@ cleanup_system_call:
lg %r12,__LC_SAVE_AREA+96 # argh
stg %r15,24(%r12)
llgh %r7,__LC_SVC_INT_CODE
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
cleanup_vtime:
clc __LC_RETURN_PSW+8(8),BASED(cleanup_system_call_insn+24)
jhe cleanup_stime
@ -992,18 +961,15 @@ cleanup_stime:
UPDATE_VTIME __LC_LAST_UPDATE_TIMER,__LC_EXIT_TIMER,__LC_SYSTEM_TIMER
cleanup_update:
mvc __LC_LAST_UPDATE_TIMER(8),__LC_SYNC_ENTER_TIMER
#endif
mvc __LC_RETURN_PSW+8(8),BASED(cleanup_table_system_call+8)
la %r12,__LC_RETURN_PSW
br %r14
cleanup_system_call_insn:
.quad sysc_saveall
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
.quad system_call
.quad sysc_vtime
.quad sysc_stime
.quad sysc_update
#endif
cleanup_sysc_return:
mvc __LC_RETURN_PSW(8),0(%r12)
@ -1014,11 +980,9 @@ cleanup_sysc_return:
cleanup_sysc_leave:
clc 8(8,%r12),BASED(cleanup_sysc_leave_insn)
je 2f
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
clc 8(8,%r12),BASED(cleanup_sysc_leave_insn+8)
je 2f
#endif
mvc __LC_RETURN_PSW(16),SP_PSW(%r15)
cghi %r12,__LC_MCK_OLD_PSW
jne 0f
@ -1031,9 +995,7 @@ cleanup_sysc_leave:
br %r14
cleanup_sysc_leave_insn:
.quad sysc_done - 4
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
.quad sysc_done - 8
#endif
cleanup_io_return:
mvc __LC_RETURN_PSW(8),0(%r12)
@ -1044,11 +1006,9 @@ cleanup_io_return:
cleanup_io_leave:
clc 8(8,%r12),BASED(cleanup_io_leave_insn)
je 2f
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
mvc __LC_EXIT_TIMER(8),__LC_ASYNC_ENTER_TIMER
clc 8(8,%r12),BASED(cleanup_io_leave_insn+8)
je 2f
#endif
mvc __LC_RETURN_PSW(16),SP_PSW(%r15)
cghi %r12,__LC_MCK_OLD_PSW
jne 0f
@ -1061,9 +1021,7 @@ cleanup_io_leave:
br %r14
cleanup_io_leave_insn:
.quad io_done - 4
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
.quad io_done - 8
#endif
/*
* Integer constants

49
arch/s390/kernel/head.S
View file

@ -461,6 +461,55 @@ start:
.byte 0xf0,0xf1,0xf2,0xf3,0xf4,0xf5,0xf6,0xf7
.byte 0xf8,0xf9,0xfa,0xfb,0xfc,0xfd,0xfe,0xff
#
# startup-code at 0x10000, running in absolute addressing mode
# this is called either by the ipl loader or directly by PSW restart
# or linload or SALIPL
#
.org 0x10000
startup:basr %r13,0 # get base
.LPG0:
#ifndef CONFIG_MARCH_G5
# check processor version against MARCH_{G5,Z900,Z990,Z9_109,Z10}
stidp __LC_CPUID # store cpuid
lhi %r0,(3f-2f) / 2
la %r1,2f-.LPG0(%r13)
0: clc __LC_CPUID+4(2),0(%r1)
jne 3f
lpsw 1f-.LPG0(13) # machine type not good enough, crash
.align 16
1: .long 0x000a0000,0x00000000
2:
#if defined(CONFIG_MARCH_Z10)
.short 0x9672, 0x2064, 0x2066, 0x2084, 0x2086, 0x2094, 0x2096
#elif defined(CONFIG_MARCH_Z9_109)
.short 0x9672, 0x2064, 0x2066, 0x2084, 0x2086
#elif defined(CONFIG_MARCH_Z990)
.short 0x9672, 0x2064, 0x2066
#elif defined(CONFIG_MARCH_Z900)
.short 0x9672
#endif
3: la %r1,2(%r1)
brct %r0,0b
#endif
l %r13,0f-.LPG0(%r13)
b 0(%r13)
0: .long startup_continue
#
# params at 10400 (setup.h)
#
.org PARMAREA
.long 0,0 # IPL_DEVICE
.long 0,0 # INITRD_START
.long 0,0 # INITRD_SIZE
.org COMMAND_LINE
.byte "root=/dev/ram0 ro"
.byte 0
#ifdef CONFIG_64BIT
#include "head64.S"
#else

28
arch/s390/kernel/head31.S
View file

@ -10,34 +10,13 @@
*
*/
#
# startup-code at 0x10000, running in absolute addressing mode
# this is called either by the ipl loader or directly by PSW restart
# or linload or SALIPL
#
.org 0x10000
startup:basr %r13,0 # get base
.LPG0: l %r13,0f-.LPG0(%r13)
b 0(%r13)
0: .long startup_continue
#
# params at 10400 (setup.h)
#
.org PARMAREA
.long 0,0 # IPL_DEVICE
.long 0,0 # INITRD_START
.long 0,0 # INITRD_SIZE
.org COMMAND_LINE
.byte "root=/dev/ram0 ro"
.byte 0
.org 0x11000
startup_continue:
basr %r13,0 # get base
.LPG1: mvi __LC_AR_MODE_ID,0 # set ESA flag (mode 0)
.LPG1:
mvi __LC_AR_MODE_ID,0 # set ESA flag (mode 0)
lctl %c0,%c15,.Lctl-.LPG1(%r13) # load control registers
l %r12,.Lparmaddr-.LPG1(%r13) # pointer to parameter area
# move IPL device to lowcore
@ -50,7 +29,6 @@ startup_continue:
ahi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union+THREAD_SIZE
st %r15,__LC_KERNEL_STACK # set end of kernel stack
ahi %r15,-96
xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear backchain
#
# Save ipl parameters, clear bss memory, initialize storage key for kernel pages,
# and create a kernel NSS if the SAVESYS= parm is defined

24
arch/s390/kernel/head64.S
View file

@ -10,29 +10,6 @@
*
*/
#
# startup-code at 0x10000, running in absolute addressing mode
# this is called either by the ipl loader or directly by PSW restart
# or linload or SALIPL
#
.org 0x10000
startup:basr %r13,0 # get base
.LPG0: l %r13,0f-.LPG0(%r13)
b 0(%r13)
0: .long startup_continue
#
# params at 10400 (setup.h)
#
.org PARMAREA
.quad 0 # IPL_DEVICE
.quad 0 # INITRD_START
.quad 0 # INITRD_SIZE
.org COMMAND_LINE
.byte "root=/dev/ram0 ro"
.byte 0
.org 0x11000
startup_continue:
@ -119,7 +96,6 @@ startup_continue:
aghi %r15,1<<(PAGE_SHIFT+THREAD_ORDER) # init_task_union + THREAD_SIZE
stg %r15,__LC_KERNEL_STACK # set end of kernel stack
aghi %r15,-160
xc __SF_BACKCHAIN(4,%r15),__SF_BACKCHAIN(%r15) # clear backchain
#
# Save ipl parameters, clear bss memory, initialize storage key for kernel pages,
# and create a kernel NSS if the SAVESYS= parm is defined

56
arch/s390/kernel/mcount.S Normal file
View file

@ -0,0 +1,56 @@
/*
* Copyright IBM Corp. 2008
*
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
*
*/
#ifndef CONFIG_64BIT
.globl _mcount
_mcount:
stm %r0,%r5,8(%r15)
st %r14,56(%r15)
lr %r1,%r15
ahi %r15,-96
l %r3,100(%r15)
la %r2,0(%r14)
st %r1,0(%r15)
la %r3,0(%r3)
bras %r14,0f
.long ftrace_trace_function
0: l %r14,0(%r14)
l %r14,0(%r14)
basr %r14,%r14
ahi %r15,96
lm %r0,%r5,8(%r15)
l %r14,56(%r15)
br %r14
.globl ftrace_stub
ftrace_stub:
br %r14
#else /* CONFIG_64BIT */
.globl _mcount
_mcount:
stmg %r0,%r5,16(%r15)
stg %r14,112(%r15)
lgr %r1,%r15
aghi %r15,-160
stg %r1,0(%r15)
lgr %r2,%r14
lg %r3,168(%r15)
larl %r14,ftrace_trace_function
lg %r14,0(%r14)
basr %r14,%r14
aghi %r15,160
lmg %r0,%r5,16(%r15)
lg %r14,112(%r15)
br %r14
.globl ftrace_stub
ftrace_stub:
br %r14
#endif /* CONFIG_64BIT */

98
arch/s390/kernel/processor.c Normal file
View file

@ -0,0 +1,98 @@
/*
* arch/s390/kernel/processor.c
*
* Copyright IBM Corp. 2008
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
#define KMSG_COMPONENT "cpu"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/smp.h>
#include <linux/seq_file.h>
#include <linux/delay.h>
#include <asm/elf.h>
#include <asm/lowcore.h>
#include <asm/param.h>
void __cpuinit print_cpu_info(struct cpuinfo_S390 *cpuinfo)
{
pr_info("Processor %d started, address %d, identification %06X\n",
cpuinfo->cpu_nr, cpuinfo->cpu_addr, cpuinfo->cpu_id.ident);
}
/*
* show_cpuinfo - Get information on one CPU for use by procfs.
*/
static int show_cpuinfo(struct seq_file *m, void *v)
{
static const char *hwcap_str[8] = {
"esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp",
"edat"
};
struct cpuinfo_S390 *cpuinfo;
unsigned long n = (unsigned long) v - 1;
int i;
s390_adjust_jiffies();
preempt_disable();
if (!n) {
seq_printf(m, "vendor_id : IBM/S390\n"
"# processors : %i\n"
"bogomips per cpu: %lu.%02lu\n",
num_online_cpus(), loops_per_jiffy/(500000/HZ),
(loops_per_jiffy/(5000/HZ))%100);
seq_puts(m, "features\t: ");
for (i = 0; i < 8; i++)
if (hwcap_str[i] && (elf_hwcap & (1UL << i)))
seq_printf(m, "%s ", hwcap_str[i]);
seq_puts(m, "\n");
}
if (cpu_online(n)) {
#ifdef CONFIG_SMP
if (smp_processor_id() == n)
cpuinfo = &S390_lowcore.cpu_data;
else
cpuinfo = &lowcore_ptr[n]->cpu_data;
#else
cpuinfo = &S390_lowcore.cpu_data;
#endif
seq_printf(m, "processor %li: "
"version = %02X, "
"identification = %06X, "
"machine = %04X\n",
n, cpuinfo->cpu_id.version,
cpuinfo->cpu_id.ident,
cpuinfo->cpu_id.machine);
}
preempt_enable();
return 0;
}
static void *c_start(struct seq_file *m, loff_t *pos)
{
return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL;
}
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
++*pos;
return c_start(m, pos);
}
static void c_stop(struct seq_file *m, void *v)
{
}
const struct seq_operations cpuinfo_op = {
.start = c_start,
.next = c_next,
.stop = c_stop,
.show = show_cpuinfo,
};

10
arch/s390/kernel/ptrace.c
View file

@ -204,7 +204,6 @@ static unsigned long __peek_user(struct task_struct *child, addr_t addr)
static int
peek_user(struct task_struct *child, addr_t addr, addr_t data)
{
struct user *dummy = NULL;
addr_t tmp, mask;
/*
@ -213,8 +212,8 @@ peek_user(struct task_struct *child, addr_t addr, addr_t data)
*/
mask = __ADDR_MASK;
#ifdef CONFIG_64BIT
if (addr >= (addr_t) &dummy->regs.acrs &&
addr < (addr_t) &dummy->regs.orig_gpr2)
if (addr >= (addr_t) &((struct user *) NULL)->regs.acrs &&
addr < (addr_t) &((struct user *) NULL)->regs.orig_gpr2)
mask = 3;
#endif
if ((addr & mask) || addr > sizeof(struct user) - __ADDR_MASK)
@ -312,7 +311,6 @@ static int __poke_user(struct task_struct *child, addr_t addr, addr_t data)
static int
poke_user(struct task_struct *child, addr_t addr, addr_t data)
{
struct user *dummy = NULL;
addr_t mask;
/*
@ -321,8 +319,8 @@ poke_user(struct task_struct *child, addr_t addr, addr_t data)
*/
mask = __ADDR_MASK;
#ifdef CONFIG_64BIT
if (addr >= (addr_t) &dummy->regs.acrs &&
addr < (addr_t) &dummy->regs.orig_gpr2)
if (addr >= (addr_t) &((struct user *) NULL)->regs.acrs &&
addr < (addr_t) &((struct user *) NULL)->regs.orig_gpr2)
mask = 3;
#endif
if ((addr & mask) || addr > sizeof(struct user) - __ADDR_MASK)

5
arch/s390/kernel/s390_ksyms.c
View file

@ -14,6 +14,7 @@
#include <asm/delay.h>
#include <asm/pgalloc.h>
#include <asm/setup.h>
#include <asm/ftrace.h>
#ifdef CONFIG_IP_MULTICAST
#include <net/arp.h>
#endif
@ -43,3 +44,7 @@ EXPORT_SYMBOL(csum_fold);
EXPORT_SYMBOL(console_mode);
EXPORT_SYMBOL(console_devno);
EXPORT_SYMBOL(console_irq);
#ifdef CONFIG_FUNCTION_TRACER
EXPORT_SYMBOL(_mcount);
#endif

185
arch/s390/kernel/setup.c
View file

@ -14,6 +14,9 @@
* This file handles the architecture-dependent parts of initialization
*/
#define KMSG_COMPONENT "setup"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/sched.h>
@ -32,7 +35,6 @@
#include <linux/bootmem.h>
#include <linux/root_dev.h>
#include <linux/console.h>
#include <linux/seq_file.h>
#include <linux/kernel_stat.h>
#include <linux/device.h>
#include <linux/notifier.h>
@ -291,8 +293,8 @@ unsigned int switch_amode = 0;
#endif
EXPORT_SYMBOL_GPL(switch_amode);
static void set_amode_and_uaccess(unsigned long user_amode,
unsigned long user32_amode)
static int set_amode_and_uaccess(unsigned long user_amode,
unsigned long user32_amode)
{
psw_user_bits = PSW_BASE_BITS | PSW_MASK_DAT | user_amode |
PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK |
@ -309,11 +311,11 @@ static void set_amode_and_uaccess(unsigned long user_amode,
PSW_MASK_MCHECK | PSW_DEFAULT_KEY;
if (MACHINE_HAS_MVCOS) {
printk("mvcos available.\n");
memcpy(&uaccess, &uaccess_mvcos_switch, sizeof(uaccess));
return 1;
} else {
printk("mvcos not available.\n");
memcpy(&uaccess, &uaccess_pt, sizeof(uaccess));
return 0;
}
}
@ -328,9 +330,10 @@ static int __init early_parse_switch_amode(char *p)
early_param("switch_amode", early_parse_switch_amode);
#else /* CONFIG_S390_SWITCH_AMODE */
static inline void set_amode_and_uaccess(unsigned long user_amode,
unsigned long user32_amode)
static inline int set_amode_and_uaccess(unsigned long user_amode,
unsigned long user32_amode)
{
return 0;
}
#endif /* CONFIG_S390_SWITCH_AMODE */
@ -355,11 +358,20 @@ early_param("noexec", early_parse_noexec);
static void setup_addressing_mode(void)
{
if (s390_noexec) {
printk("S390 execute protection active, ");
set_amode_and_uaccess(PSW_ASC_SECONDARY, PSW32_ASC_SECONDARY);
if (set_amode_and_uaccess(PSW_ASC_SECONDARY,
PSW32_ASC_SECONDARY))
pr_info("Execute protection active, "
"mvcos available\n");
else
pr_info("Execute protection active, "
"mvcos not available\n");
} else if (switch_amode) {
printk("S390 address spaces switched, ");
set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY);
if (set_amode_and_uaccess(PSW_ASC_PRIMARY, PSW32_ASC_PRIMARY))
pr_info("Address spaces switched, "
"mvcos available\n");
else
pr_info("Address spaces switched, "
"mvcos not available\n");
}
#ifdef CONFIG_TRACE_IRQFLAGS
sysc_restore_trace_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
@ -572,15 +584,15 @@ setup_memory(void)
start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE;
if (start + INITRD_SIZE > memory_end) {
printk("initrd extends beyond end of memory "
"(0x%08lx > 0x%08lx)\n"
pr_err("initrd extends beyond end of "
"memory (0x%08lx > 0x%08lx) "
"disabling initrd\n",
start + INITRD_SIZE, memory_end);
INITRD_START = INITRD_SIZE = 0;
} else {
printk("Moving initrd (0x%08lx -> 0x%08lx, "
"size: %ld)\n",
INITRD_START, start, INITRD_SIZE);
pr_info("Moving initrd (0x%08lx -> "
"0x%08lx, size: %ld)\n",
INITRD_START, start, INITRD_SIZE);
memmove((void *) start, (void *) INITRD_START,
INITRD_SIZE);
INITRD_START = start;
@ -642,8 +654,9 @@ setup_memory(void)
initrd_start = INITRD_START;
initrd_end = initrd_start + INITRD_SIZE;
} else {
printk("initrd extends beyond end of memory "
"(0x%08lx > 0x%08lx)\ndisabling initrd\n",
pr_err("initrd extends beyond end of "
"memory (0x%08lx > 0x%08lx) "
"disabling initrd\n",
initrd_start + INITRD_SIZE, memory_end);
initrd_start = initrd_end = 0;
}
@ -651,23 +664,6 @@ setup_memory(void)
#endif
}
static int __init __stfle(unsigned long long *list, int doublewords)
{
typedef struct { unsigned long long _[doublewords]; } addrtype;
register unsigned long __nr asm("0") = doublewords - 1;
asm volatile(".insn s,0xb2b00000,%0" /* stfle */
: "=m" (*(addrtype *) list), "+d" (__nr) : : "cc");
return __nr + 1;
}
int __init stfle(unsigned long long *list, int doublewords)
{
if (!(stfl() & (1UL << 24)))
return -EOPNOTSUPP;
return __stfle(list, doublewords);
}
/*
* Setup hardware capabilities.
*/
@ -739,8 +735,13 @@ static void __init setup_hwcaps(void)
strcpy(elf_platform, "z990");
break;
case 0x2094:
case 0x2096:
strcpy(elf_platform, "z9-109");
break;
case 0x2097:
case 0x2098:
strcpy(elf_platform, "z10");
break;
}
}
@ -752,25 +753,34 @@ static void __init setup_hwcaps(void)
void __init
setup_arch(char **cmdline_p)
{
/* set up preferred console */
add_preferred_console("ttyS", 0, NULL);
/*
* print what head.S has found out about the machine
*/
#ifndef CONFIG_64BIT
printk((MACHINE_IS_VM) ?
"We are running under VM (31 bit mode)\n" :
"We are running native (31 bit mode)\n");
printk((MACHINE_HAS_IEEE) ?
"This machine has an IEEE fpu\n" :
"This machine has no IEEE fpu\n");
if (MACHINE_IS_VM)
pr_info("Linux is running as a z/VM "
"guest operating system in 31-bit mode\n");
else
pr_info("Linux is running natively in 31-bit mode\n");
if (MACHINE_HAS_IEEE)
pr_info("The hardware system has IEEE compatible "
"floating point units\n");
else
pr_info("The hardware system has no IEEE compatible "
"floating point units\n");
#else /* CONFIG_64BIT */
if (MACHINE_IS_VM)
printk("We are running under VM (64 bit mode)\n");
pr_info("Linux is running as a z/VM "
"guest operating system in 64-bit mode\n");
else if (MACHINE_IS_KVM) {
printk("We are running under KVM (64 bit mode)\n");
pr_info("Linux is running under KVM in 64-bit mode\n");
add_preferred_console("hvc", 0, NULL);
s390_virtio_console_init();
} else
printk("We are running native (64 bit mode)\n");
pr_info("Linux is running natively in 64-bit mode\n");
#endif /* CONFIG_64BIT */
/* Have one command line that is parsed and saved in /proc/cmdline */
@ -818,90 +828,3 @@ setup_arch(char **cmdline_p)
/* Setup zfcpdump support */
setup_zfcpdump(console_devno);
}
void __cpuinit print_cpu_info(struct cpuinfo_S390 *cpuinfo)
{
printk(KERN_INFO "cpu %d "
#ifdef CONFIG_SMP
"phys_idx=%d "
#endif
"vers=%02X ident=%06X machine=%04X unused=%04X\n",
cpuinfo->cpu_nr,
#ifdef CONFIG_SMP
cpuinfo->cpu_addr,
#endif
cpuinfo->cpu_id.version,
cpuinfo->cpu_id.ident,
cpuinfo->cpu_id.machine,
cpuinfo->cpu_id.unused);
}
/*
* show_cpuinfo - Get information on one CPU for use by procfs.
*/
static int show_cpuinfo(struct seq_file *m, void *v)
{
static const char *hwcap_str[8] = {
"esan3", "zarch", "stfle", "msa", "ldisp", "eimm", "dfp",
"edat"
};
struct cpuinfo_S390 *cpuinfo;
unsigned long n = (unsigned long) v - 1;
int i;
s390_adjust_jiffies();
preempt_disable();
if (!n) {
seq_printf(m, "vendor_id : IBM/S390\n"
"# processors : %i\n"
"bogomips per cpu: %lu.%02lu\n",
num_online_cpus(), loops_per_jiffy/(500000/HZ),
(loops_per_jiffy/(5000/HZ))%100);
seq_puts(m, "features\t: ");
for (i = 0; i < 8; i++)
if (hwcap_str[i] && (elf_hwcap & (1UL << i)))
seq_printf(m, "%s ", hwcap_str[i]);
seq_puts(m, "\n");
}
if (cpu_online(n)) {
#ifdef CONFIG_SMP
if (smp_processor_id() == n)
cpuinfo = &S390_lowcore.cpu_data;
else
cpuinfo = &lowcore_ptr[n]->cpu_data;
#else
cpuinfo = &S390_lowcore.cpu_data;
#endif
seq_printf(m, "processor %li: "
"version = %02X, "
"identification = %06X, "
"machine = %04X\n",
n, cpuinfo->cpu_id.version,
cpuinfo->cpu_id.ident,
cpuinfo->cpu_id.machine);
}
preempt_enable();
return 0;
}
static void *c_start(struct seq_file *m, loff_t *pos)
{
return *pos < NR_CPUS ? (void *)((unsigned long) *pos + 1) : NULL;
}
static void *c_next(struct seq_file *m, void *v, loff_t *pos)
{
++*pos;
return c_start(m, pos);
}
static void c_stop(struct seq_file *m, void *v)
{
}
const struct seq_operations cpuinfo_op = {
.start = c_start,
.next = c_next,
.stop = c_stop,
.show = show_cpuinfo,
};

201
arch/s390/kernel/smp.c
View file

@ -20,6 +20,9 @@
* cpu_number_map in other architectures.
*/
#define KMSG_COMPONENT "cpu"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/mm.h>
@ -77,159 +80,6 @@ static DEFINE_PER_CPU(struct cpu, cpu_devices);
static void smp_ext_bitcall(int, ec_bit_sig);
/*
* Structure and data for __smp_call_function_map(). This is designed to
* minimise static memory requirements. It also looks cleaner.
*/
static DEFINE_SPINLOCK(call_lock);
struct call_data_struct {
void (*func) (void *info);
void *info;
cpumask_t started;
cpumask_t finished;
int wait;
};
static struct call_data_struct *call_data;
/*
* 'Call function' interrupt callback
*/
static void do_call_function(void)
{
void (*func) (void *info) = call_data->func;
void *info = call_data->info;
int wait = call_data->wait;
cpu_set(smp_processor_id(), call_data->started);
(*func)(info);
if (wait)
cpu_set(smp_processor_id(), call_data->finished);;
}
static void __smp_call_function_map(void (*func) (void *info), void *info,
int wait, cpumask_t map)
{
struct call_data_struct data;
int cpu, local = 0;
/*
* Can deadlock when interrupts are disabled or if in wrong context.
*/
WARN_ON(irqs_disabled() || in_irq());
/*
* Check for local function call. We have to have the same call order
* as in on_each_cpu() because of machine_restart_smp().
*/
if (cpu_isset(smp_processor_id(), map)) {
local = 1;
cpu_clear(smp_processor_id(), map);
}
cpus_and(map, map, cpu_online_map);
if (cpus_empty(map))
goto out;
data.func = func;
data.info = info;
data.started = CPU_MASK_NONE;
data.wait = wait;
if (wait)
data.finished = CPU_MASK_NONE;
call_data = &data;
for_each_cpu_mask(cpu, map)
smp_ext_bitcall(cpu, ec_call_function);
/* Wait for response */
while (!cpus_equal(map, data.started))
cpu_relax();
if (wait)
while (!cpus_equal(map, data.finished))
cpu_relax();
out:
if (local) {
local_irq_disable();
func(info);
local_irq_enable();
}
}
/*
* smp_call_function:
* @func: the function to run; this must be fast and non-blocking
* @info: an arbitrary pointer to pass to the function
* @wait: if true, wait (atomically) until function has completed on other CPUs
*
* Run a function on all other CPUs.
*
* You must not call this function with disabled interrupts, from a
* hardware interrupt handler or from a bottom half.
*/
int smp_call_function(void (*func) (void *info), void *info, int wait)
{
cpumask_t map;
spin_lock(&call_lock);
map = cpu_online_map;
cpu_clear(smp_processor_id(), map);
__smp_call_function_map(func, info, wait, map);
spin_unlock(&call_lock);
return 0;
}
EXPORT_SYMBOL(smp_call_function);
/*
* smp_call_function_single:
* @cpu: the CPU where func should run
* @func: the function to run; this must be fast and non-blocking
* @info: an arbitrary pointer to pass to the function
* @wait: if true, wait (atomically) until function has completed on other CPUs
*
* Run a function on one processor.
*
* You must not call this function with disabled interrupts, from a
* hardware interrupt handler or from a bottom half.
*/
int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
int wait)
{
spin_lock(&call_lock);
__smp_call_function_map(func, info, wait, cpumask_of_cpu(cpu));
spin_unlock(&call_lock);
return 0;
}
EXPORT_SYMBOL(smp_call_function_single);
/**
* smp_call_function_mask(): Run a function on a set of other CPUs.
* @mask: The set of cpus to run on. Must not include the current cpu.
* @func: The function to run. This must be fast and non-blocking.
* @info: An arbitrary pointer to pass to the function.
* @wait: If true, wait (atomically) until function has completed on other CPUs.
*
* Returns 0 on success, else a negative status code.
*
* If @wait is true, then returns once @func has returned; otherwise
* it returns just before the target cpu calls @func.
*
* You must not call this function with disabled interrupts or from a
* hardware interrupt handler or from a bottom half handler.
*/
int smp_call_function_mask(cpumask_t mask, void (*func)(void *), void *info,
int wait)
{
spin_lock(&call_lock);
cpu_clear(smp_processor_id(), mask);
__smp_call_function_map(func, info, wait, mask);
spin_unlock(&call_lock);
return 0;
}
EXPORT_SYMBOL(smp_call_function_mask);
void smp_send_stop(void)
{
int cpu, rc;
@ -271,7 +121,10 @@ static void do_ext_call_interrupt(__u16 code)
bits = xchg(&S390_lowcore.ext_call_fast, 0);
if (test_bit(ec_call_function, &bits))
do_call_function();
generic_smp_call_function_interrupt();
if (test_bit(ec_call_function_single, &bits))
generic_smp_call_function_single_interrupt();
}
/*
@ -288,6 +141,19 @@ static void smp_ext_bitcall(int cpu, ec_bit_sig sig)
udelay(10);
}
void arch_send_call_function_ipi(cpumask_t mask)
{
int cpu;
for_each_cpu_mask(cpu, mask)
smp_ext_bitcall(cpu, ec_call_function);
}
void arch_send_call_function_single_ipi(int cpu)
{
smp_ext_bitcall(cpu, ec_call_function_single);
}
#ifndef CONFIG_64BIT
/*
* this function sends a 'purge tlb' signal to another CPU.
@ -388,8 +254,8 @@ static void __init smp_get_save_area(unsigned int cpu, unsigned int phy_cpu)
if (ipl_info.type != IPL_TYPE_FCP_DUMP)
return;
if (cpu >= NR_CPUS) {
printk(KERN_WARNING "Registers for cpu %i not saved since dump "
"kernel was compiled with NR_CPUS=%i\n", cpu, NR_CPUS);
pr_warning("CPU %i exceeds the maximum %i and is excluded from "
"the dump\n", cpu, NR_CPUS - 1);
return;
}
zfcpdump_save_areas[cpu] = kmalloc(sizeof(union save_area), GFP_KERNEL);
@ -562,7 +428,7 @@ static void __init smp_detect_cpus(void)
}
out:
kfree(info);
printk(KERN_INFO "CPUs: %d configured, %d standby\n", c_cpus, s_cpus);
pr_info("%d configured CPUs, %d standby CPUs\n", c_cpus, s_cpus);
get_online_cpus();
__smp_rescan_cpus();
put_online_cpus();
@ -578,19 +444,17 @@ int __cpuinit start_secondary(void *cpuvoid)
preempt_disable();
/* Enable TOD clock interrupts on the secondary cpu. */
init_cpu_timer();
#ifdef CONFIG_VIRT_TIMER
/* Enable cpu timer interrupts on the secondary cpu. */
init_cpu_vtimer();
#endif
/* Enable pfault pseudo page faults on this cpu. */
pfault_init();
/* call cpu notifiers */
notify_cpu_starting(smp_processor_id());
/* Mark this cpu as online */
spin_lock(&call_lock);
ipi_call_lock();
cpu_set(smp_processor_id(), cpu_online_map);
spin_unlock(&call_lock);
ipi_call_unlock();
/* Switch on interrupts */
local_irq_enable();
/* Print info about this processor */
@ -639,18 +503,15 @@ static int __cpuinit smp_alloc_lowcore(int cpu)
save_area = get_zeroed_page(GFP_KERNEL);
if (!save_area)
goto out_save_area;
goto out;
lowcore->extended_save_area_addr = (u32) save_area;
}
#endif
lowcore_ptr[cpu] = lowcore;
return 0;
#ifndef CONFIG_64BIT
out_save_area:
free_page(panic_stack);
#endif
out:
free_page(panic_stack);
free_pages(async_stack, ASYNC_ORDER);
free_pages((unsigned long) lowcore, lc_order);
return -ENOMEM;
@ -690,12 +551,8 @@ int __cpuinit __cpu_up(unsigned int cpu)
ccode = signal_processor_p((__u32)(unsigned long)(lowcore_ptr[cpu]),
cpu, sigp_set_prefix);
if (ccode) {
printk("sigp_set_prefix failed for cpu %d "
"with condition code %d\n",
(int) cpu, (int) ccode);
if (ccode)
return -EIO;
}
idle = current_set[cpu];
cpu_lowcore = lowcore_ptr[cpu];
@ -778,7 +635,7 @@ void __cpu_die(unsigned int cpu)
while (!smp_cpu_not_running(cpu))
cpu_relax();
smp_free_lowcore(cpu);
printk(KERN_INFO "Processor %d spun down\n", cpu);
pr_info("Processor %d stopped\n", cpu);
}
void cpu_die(void)

278
arch/s390/kernel/time.c
View file

@ -12,6 +12,9 @@
* Copyright (C) 1991, 1992, 1995 Linus Torvalds
*/
#define KMSG_COMPONENT "time"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/errno.h>
#include <linux/module.h>
#include <linux/sched.h>
@ -20,6 +23,8 @@
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/interrupt.h>
#include <linux/cpu.h>
#include <linux/stop_machine.h>
#include <linux/time.h>
#include <linux/sysdev.h>
#include <linux/delay.h>
@ -36,6 +41,7 @@
#include <asm/delay.h>
#include <asm/s390_ext.h>
#include <asm/div64.h>
#include <asm/vdso.h>
#include <asm/irq.h>
#include <asm/irq_regs.h>
#include <asm/timer.h>
@ -223,6 +229,36 @@ static struct clocksource clocksource_tod = {
};
void update_vsyscall(struct timespec *wall_time, struct clocksource *clock)
{
if (clock != &clocksource_tod)
return;
/* Make userspace gettimeofday spin until we're done. */
++vdso_data->tb_update_count;
smp_wmb();
vdso_data->xtime_tod_stamp = clock->cycle_last;
vdso_data->xtime_clock_sec = xtime.tv_sec;
vdso_data->xtime_clock_nsec = xtime.tv_nsec;
vdso_data->wtom_clock_sec = wall_to_monotonic.tv_sec;
vdso_data->wtom_clock_nsec = wall_to_monotonic.tv_nsec;
smp_wmb();
++vdso_data->tb_update_count;
}
extern struct timezone sys_tz;
void update_vsyscall_tz(void)
{
/* Make userspace gettimeofday spin until we're done. */
++vdso_data->tb_update_count;
smp_wmb();
vdso_data->tz_minuteswest = sys_tz.tz_minuteswest;
vdso_data->tz_dsttime = sys_tz.tz_dsttime;
smp_wmb();
++vdso_data->tb_update_count;
}
/*
* Initialize the TOD clock and the CPU timer of
* the boot cpu.
@ -253,10 +289,8 @@ void __init time_init(void)
/* Enable TOD clock interrupts on the boot cpu. */
init_cpu_timer();
#ifdef CONFIG_VIRT_TIMER
/* Enable cpu timer interrupts on the boot cpu. */
vtime_init();
#endif
}
/*
@ -288,8 +322,8 @@ static unsigned long long adjust_time(unsigned long long old,
}
sched_clock_base_cc += delta;
if (adjust.offset != 0) {
printk(KERN_NOTICE "etr: time adjusted by %li micro-seconds\n",
adjust.offset);
pr_notice("The ETR interface has adjusted the clock "
"by %li microseconds\n", adjust.offset);
adjust.modes = ADJ_OFFSET_SINGLESHOT;
do_adjtimex(&adjust);
}
@ -360,6 +394,15 @@ static void enable_sync_clock(void)
atomic_set_mask(0x80000000, sw_ptr);
}
/* Single threaded workqueue used for etr and stp sync events */
static struct workqueue_struct *time_sync_wq;
static void __init time_init_wq(void)
{
if (!time_sync_wq)
time_sync_wq = create_singlethread_workqueue("timesync");
}
/*
* External Time Reference (ETR) code.
*/
@ -425,6 +468,7 @@ static struct timer_list etr_timer;
static void etr_timeout(unsigned long dummy);
static void etr_work_fn(struct work_struct *work);
static DEFINE_MUTEX(etr_work_mutex);
static DECLARE_WORK(etr_work, etr_work_fn);
/*
@ -440,8 +484,8 @@ static void etr_reset(void)
etr_tolec = get_clock();
set_bit(CLOCK_SYNC_HAS_ETR, &clock_sync_flags);
} else if (etr_port0_online || etr_port1_online) {
printk(KERN_WARNING "Running on non ETR capable "
"machine, only local mode available.\n");
pr_warning("The real or virtual hardware system does "
"not provide an ETR interface\n");
etr_port0_online = etr_port1_online = 0;
}
}
@ -452,17 +496,18 @@ static int __init etr_init(void)
if (!test_bit(CLOCK_SYNC_HAS_ETR, &clock_sync_flags))
return 0;
time_init_wq();
/* Check if this machine has the steai instruction. */
if (etr_steai(&aib, ETR_STEAI_STEPPING_PORT) == 0)
etr_steai_available = 1;
setup_timer(&etr_timer, etr_timeout, 0UL);
if (etr_port0_online) {
set_bit(ETR_EVENT_PORT0_CHANGE, &etr_events);
schedule_work(&etr_work);
queue_work(time_sync_wq, &etr_work);
}
if (etr_port1_online) {
set_bit(ETR_EVENT_PORT1_CHANGE, &etr_events);
schedule_work(&etr_work);
queue_work(time_sync_wq, &etr_work);
}
return 0;
}
@ -489,7 +534,7 @@ void etr_switch_to_local(void)
if (test_bit(CLOCK_SYNC_ETR, &clock_sync_flags))
disable_sync_clock(NULL);
set_bit(ETR_EVENT_SWITCH_LOCAL, &etr_events);
schedule_work(&etr_work);
queue_work(time_sync_wq, &etr_work);
}
/*
@ -505,7 +550,7 @@ void etr_sync_check(void)
if (test_bit(CLOCK_SYNC_ETR, &clock_sync_flags))
disable_sync_clock(NULL);
set_bit(ETR_EVENT_SYNC_CHECK, &etr_events);
schedule_work(&etr_work);
queue_work(time_sync_wq, &etr_work);
}
/*
@ -529,13 +574,13 @@ static void etr_timing_alert(struct etr_irq_parm *intparm)
* Both ports are not up-to-date now.
*/
set_bit(ETR_EVENT_PORT_ALERT, &etr_events);
schedule_work(&etr_work);
queue_work(time_sync_wq, &etr_work);
}
static void etr_timeout(unsigned long dummy)
{
set_bit(ETR_EVENT_UPDATE, &etr_events);
schedule_work(&etr_work);
queue_work(time_sync_wq, &etr_work);
}
/*
@ -642,14 +687,16 @@ static int etr_aib_follows(struct etr_aib *a1, struct etr_aib *a2, int p)
}
struct clock_sync_data {
atomic_t cpus;
int in_sync;
unsigned long long fixup_cc;
int etr_port;
struct etr_aib *etr_aib;
};
static void clock_sync_cpu_start(void *dummy)
static void clock_sync_cpu(struct clock_sync_data *sync)
{
struct clock_sync_data *sync = dummy;
atomic_dec(&sync->cpus);
enable_sync_clock();
/*
* This looks like a busy wait loop but it isn't. etr_sync_cpus
@ -675,39 +722,35 @@ static void clock_sync_cpu_start(void *dummy)
fixup_clock_comparator(sync->fixup_cc);
}
static void clock_sync_cpu_end(void *dummy)
{
}
/*
* Sync the TOD clock using the port refered to by aibp. This port
* has to be enabled and the other port has to be disabled. The
* last eacr update has to be more than 1.6 seconds in the past.
*/
static int etr_sync_clock(struct etr_aib *aib, int port)
static int etr_sync_clock(void *data)
{
struct etr_aib *sync_port;
struct clock_sync_data etr_sync;
static int first;
unsigned long long clock, old_clock, delay, delta;
int follows;
struct clock_sync_data *etr_sync;
struct etr_aib *sync_port, *aib;
int port;
int rc;
/* Check if the current aib is adjacent to the sync port aib. */
sync_port = (port == 0) ? &etr_port0 : &etr_port1;
follows = etr_aib_follows(sync_port, aib, port);
memcpy(sync_port, aib, sizeof(*aib));
if (!follows)
return -EAGAIN;
etr_sync = data;
/*
* Catch all other cpus and make them wait until we have
* successfully synced the clock. smp_call_function will
* return after all other cpus are in etr_sync_cpu_start.
*/
memset(&etr_sync, 0, sizeof(etr_sync));
preempt_disable();
smp_call_function(clock_sync_cpu_start, &etr_sync, 0);
local_irq_disable();
if (xchg(&first, 1) == 1) {
/* Slave */
clock_sync_cpu(etr_sync);
return 0;
}
/* Wait until all other cpus entered the sync function. */
while (atomic_read(&etr_sync->cpus) != 0)
cpu_relax();
port = etr_sync->etr_port;
aib = etr_sync->etr_aib;
sync_port = (port == 0) ? &etr_port0 : &etr_port1;
enable_sync_clock();
/* Set clock to next OTE. */
@ -724,16 +767,16 @@ static int etr_sync_clock(struct etr_aib *aib, int port)
delay = (unsigned long long)
(aib->edf2.etv - sync_port->edf2.etv) << 32;
delta = adjust_time(old_clock, clock, delay);
etr_sync.fixup_cc = delta;
etr_sync->fixup_cc = delta;
fixup_clock_comparator(delta);
/* Verify that the clock is properly set. */
if (!etr_aib_follows(sync_port, aib, port)) {
/* Didn't work. */
disable_sync_clock(NULL);
etr_sync.in_sync = -EAGAIN;
etr_sync->in_sync = -EAGAIN;
rc = -EAGAIN;
} else {
etr_sync.in_sync = 1;
etr_sync->in_sync = 1;
rc = 0;
}
} else {
@ -741,12 +784,33 @@ static int etr_sync_clock(struct etr_aib *aib, int port)
__ctl_clear_bit(0, 29);
__ctl_clear_bit(14, 21);
disable_sync_clock(NULL);
etr_sync.in_sync = -EAGAIN;
etr_sync->in_sync = -EAGAIN;
rc = -EAGAIN;
}
local_irq_enable();
smp_call_function(clock_sync_cpu_end, NULL, 0);
preempt_enable();
xchg(&first, 0);
return rc;
}
static int etr_sync_clock_stop(struct etr_aib *aib, int port)
{
struct clock_sync_data etr_sync;
struct etr_aib *sync_port;
int follows;
int rc;
/* Check if the current aib is adjacent to the sync port aib. */
sync_port = (port == 0) ? &etr_port0 : &etr_port1;
follows = etr_aib_follows(sync_port, aib, port);
memcpy(sync_port, aib, sizeof(*aib));
if (!follows)
return -EAGAIN;
memset(&etr_sync, 0, sizeof(etr_sync));
etr_sync.etr_aib = aib;
etr_sync.etr_port = port;
get_online_cpus();
atomic_set(&etr_sync.cpus, num_online_cpus() - 1);
rc = stop_machine(etr_sync_clock, &etr_sync, &cpu_online_map);
put_online_cpus();
return rc;
}
@ -903,7 +967,7 @@ static void etr_update_eacr(struct etr_eacr eacr)
}
/*
* ETR tasklet. In this function you'll find the main logic. In
* ETR work. In this function you'll find the main logic. In
* particular this is the only function that calls etr_update_eacr(),
* it "controls" the etr control register.
*/
@ -914,6 +978,9 @@ static void etr_work_fn(struct work_struct *work)
struct etr_aib aib;
int sync_port;
/* prevent multiple execution. */
mutex_lock(&etr_work_mutex);
/* Create working copy of etr_eacr. */
eacr = etr_eacr;
@ -929,7 +996,7 @@ static void etr_work_fn(struct work_struct *work)
del_timer_sync(&etr_timer);
etr_update_eacr(eacr);
clear_bit(CLOCK_SYNC_ETR, &clock_sync_flags);
return;
goto out_unlock;
}
/* Store aib to get the current ETR status word. */
@ -1016,7 +1083,7 @@ static void etr_work_fn(struct work_struct *work)
eacr.es || sync_port < 0) {
etr_update_eacr(eacr);
etr_set_tolec_timeout(now);
return;
goto out_unlock;
}
/*
@ -1036,7 +1103,7 @@ static void etr_work_fn(struct work_struct *work)
etr_update_eacr(eacr);
set_bit(CLOCK_SYNC_ETR, &clock_sync_flags);
if (now < etr_tolec + (1600000 << 12) ||
etr_sync_clock(&aib, sync_port) != 0) {
etr_sync_clock_stop(&aib, sync_port) != 0) {
/* Sync failed. Try again in 1/2 second. */
eacr.es = 0;
etr_update_eacr(eacr);
@ -1044,6 +1111,8 @@ static void etr_work_fn(struct work_struct *work)
etr_set_sync_timeout();
} else
etr_set_tolec_timeout(now);
out_unlock:
mutex_unlock(&etr_work_mutex);
}
/*
@ -1125,13 +1194,13 @@ static ssize_t etr_online_store(struct sys_device *dev,
return count; /* Nothing to do. */
etr_port0_online = value;
set_bit(ETR_EVENT_PORT0_CHANGE, &etr_events);
schedule_work(&etr_work);
queue_work(time_sync_wq, &etr_work);
} else {
if (etr_port1_online == value)
return count; /* Nothing to do. */
etr_port1_online = value;
set_bit(ETR_EVENT_PORT1_CHANGE, &etr_events);
schedule_work(&etr_work);
queue_work(time_sync_wq, &etr_work);
}
return count;
}
@ -1332,6 +1401,7 @@ static struct stp_sstpi stp_info;
static void *stp_page;
static void stp_work_fn(struct work_struct *work);
static DEFINE_MUTEX(stp_work_mutex);
static DECLARE_WORK(stp_work, stp_work_fn);
static int __init early_parse_stp(char *p)
@ -1356,7 +1426,8 @@ static void __init stp_reset(void)
if (rc == 0)
set_bit(CLOCK_SYNC_HAS_STP, &clock_sync_flags);
else if (stp_online) {
printk(KERN_WARNING "Running on non STP capable machine.\n");
pr_warning("The real or virtual hardware system does "
"not provide an STP interface\n");
free_bootmem((unsigned long) stp_page, PAGE_SIZE);
stp_page = NULL;
stp_online = 0;
@ -1365,8 +1436,12 @@ static void __init stp_reset(void)
static int __init stp_init(void)
{
if (test_bit(CLOCK_SYNC_HAS_STP, &clock_sync_flags) && stp_online)
schedule_work(&stp_work);
if (!test_bit(CLOCK_SYNC_HAS_STP, &clock_sync_flags))
return 0;
time_init_wq();
if (!stp_online)
return 0;
queue_work(time_sync_wq, &stp_work);
return 0;
}
@ -1383,7 +1458,7 @@ arch_initcall(stp_init);
static void stp_timing_alert(struct stp_irq_parm *intparm)
{
if (intparm->tsc || intparm->lac || intparm->tcpc)
schedule_work(&stp_work);
queue_work(time_sync_wq, &stp_work);
}
/*
@ -1397,7 +1472,7 @@ void stp_sync_check(void)
if (!test_bit(CLOCK_SYNC_STP, &clock_sync_flags))
return;
disable_sync_clock(NULL);
schedule_work(&stp_work);
queue_work(time_sync_wq, &stp_work);
}
/*
@ -1411,46 +1486,34 @@ void stp_island_check(void)
if (!test_bit(CLOCK_SYNC_STP, &clock_sync_flags))
return;
disable_sync_clock(NULL);
schedule_work(&stp_work);
queue_work(time_sync_wq, &stp_work);
}
/*
* STP tasklet. Check for the STP state and take over the clock
* synchronization if the STP clock source is usable.
*/
static void stp_work_fn(struct work_struct *work)
static int stp_sync_clock(void *data)
{
struct clock_sync_data stp_sync;
static int first;
unsigned long long old_clock, delta;
struct clock_sync_data *stp_sync;
int rc;
if (!stp_online) {
chsc_sstpc(stp_page, STP_OP_CTRL, 0x0000);
return;
stp_sync = data;
if (xchg(&first, 1) == 1) {
/* Slave */
clock_sync_cpu(stp_sync);
return 0;
}
rc = chsc_sstpc(stp_page, STP_OP_CTRL, 0xb0e0);
if (rc)
return;
/* Wait until all other cpus entered the sync function. */
while (atomic_read(&stp_sync->cpus) != 0)
cpu_relax();
rc = chsc_sstpi(stp_page, &stp_info, sizeof(struct stp_sstpi));
if (rc || stp_info.c == 0)
return;
/*
* Catch all other cpus and make them wait until we have
* successfully synced the clock. smp_call_function will
* return after all other cpus are in clock_sync_cpu_start.
*/
memset(&stp_sync, 0, sizeof(stp_sync));
preempt_disable();
smp_call_function(clock_sync_cpu_start, &stp_sync, 0);
local_irq_disable();
enable_sync_clock();
set_bit(CLOCK_SYNC_STP, &clock_sync_flags);
if (test_and_clear_bit(CLOCK_SYNC_ETR, &clock_sync_flags))
schedule_work(&etr_work);
queue_work(time_sync_wq, &etr_work);
rc = 0;
if (stp_info.todoff[0] || stp_info.todoff[1] ||
@ -1469,16 +1532,49 @@ static void stp_work_fn(struct work_struct *work)
}
if (rc) {
disable_sync_clock(NULL);
stp_sync.in_sync = -EAGAIN;
stp_sync->in_sync = -EAGAIN;
clear_bit(CLOCK_SYNC_STP, &clock_sync_flags);
if (etr_port0_online || etr_port1_online)
schedule_work(&etr_work);
queue_work(time_sync_wq, &etr_work);
} else
stp_sync.in_sync = 1;
stp_sync->in_sync = 1;
xchg(&first, 0);
return 0;
}
local_irq_enable();
smp_call_function(clock_sync_cpu_end, NULL, 0);
preempt_enable();
/*
* STP work. Check for the STP state and take over the clock
* synchronization if the STP clock source is usable.
*/
static void stp_work_fn(struct work_struct *work)
{
struct clock_sync_data stp_sync;
int rc;
/* prevent multiple execution. */
mutex_lock(&stp_work_mutex);
if (!stp_online) {
chsc_sstpc(stp_page, STP_OP_CTRL, 0x0000);
goto out_unlock;
}
rc = chsc_sstpc(stp_page, STP_OP_CTRL, 0xb0e0);
if (rc)
goto out_unlock;
rc = chsc_sstpi(stp_page, &stp_info, sizeof(struct stp_sstpi));
if (rc || stp_info.c == 0)
goto out_unlock;
memset(&stp_sync, 0, sizeof(stp_sync));
get_online_cpus();
atomic_set(&stp_sync.cpus, num_online_cpus() - 1);
stop_machine(stp_sync_clock, &stp_sync, &cpu_online_map);
put_online_cpus();
out_unlock:
mutex_unlock(&stp_work_mutex);
}
/*
@ -1587,7 +1683,7 @@ static ssize_t stp_online_store(struct sysdev_class *class,
if (!test_bit(CLOCK_SYNC_HAS_STP, &clock_sync_flags))
return -EOPNOTSUPP;
stp_online = value;
schedule_work(&stp_work);
queue_work(time_sync_wq, &stp_work);
return count;
}

41
arch/s390/kernel/topology.c
View file

@ -3,6 +3,9 @@
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
*/
#define KMSG_COMPONENT "cpu"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/init.h>
@ -12,6 +15,7 @@
#include <linux/workqueue.h>
#include <linux/cpu.h>
#include <linux/smp.h>
#include <linux/cpuset.h>
#include <asm/delay.h>
#include <asm/s390_ext.h>
#include <asm/sysinfo.h>
@ -57,11 +61,11 @@ struct core_info {
cpumask_t mask;
};
static int topology_enabled;
static void topology_work_fn(struct work_struct *work);
static struct tl_info *tl_info;
static struct core_info core_info;
static int machine_has_topology;
static int machine_has_topology_irq;
static struct timer_list topology_timer;
static void set_topology_timer(void);
static DECLARE_WORK(topology_work, topology_work_fn);
@ -77,8 +81,8 @@ cpumask_t cpu_coregroup_map(unsigned int cpu)
cpumask_t mask;
cpus_clear(mask);
if (!machine_has_topology)
return cpu_present_map;
if (!topology_enabled || !machine_has_topology)
return cpu_possible_map;
spin_lock_irqsave(&topology_lock, flags);
while (core) {
if (cpu_isset(cpu, core->mask)) {
@ -168,7 +172,7 @@ static void topology_update_polarization_simple(void)
int cpu;
mutex_lock(&smp_cpu_state_mutex);
for_each_present_cpu(cpu)
for_each_possible_cpu(cpu)
smp_cpu_polarization[cpu] = POLARIZATION_HRZ;
mutex_unlock(&smp_cpu_state_mutex);
}
@ -199,7 +203,7 @@ int topology_set_cpu_management(int fc)
rc = ptf(PTF_HORIZONTAL);
if (rc)
return -EBUSY;
for_each_present_cpu(cpu)
for_each_possible_cpu(cpu)
smp_cpu_polarization[cpu] = POLARIZATION_UNKNWN;
return rc;
}
@ -208,7 +212,7 @@ static void update_cpu_core_map(void)
{
int cpu;
for_each_present_cpu(cpu)
for_each_possible_cpu(cpu)
cpu_core_map[cpu] = cpu_coregroup_map(cpu);
}
@ -235,7 +239,7 @@ int arch_update_cpu_topology(void)
static void topology_work_fn(struct work_struct *work)
{
arch_reinit_sched_domains();
rebuild_sched_domains();
}
void topology_schedule_update(void)
@ -258,10 +262,14 @@ static void set_topology_timer(void)
add_timer(&topology_timer);
}
static void topology_interrupt(__u16 code)
static int __init early_parse_topology(char *p)
{
schedule_work(&topology_work);
if (strncmp(p, "on", 2))
return 0;
topology_enabled = 1;
return 0;
}
early_param("topology", early_parse_topology);
static int __init init_topology_update(void)
{
@ -273,14 +281,7 @@ static int __init init_topology_update(void)
goto out;
}
init_timer_deferrable(&topology_timer);
if (machine_has_topology_irq) {
rc = register_external_interrupt(0x2005, topology_interrupt);
if (rc)
goto out;
ctl_set_bit(0, 8);
}
else
set_topology_timer();
set_topology_timer();
out:
update_cpu_core_map();
return rc;
@ -301,9 +302,6 @@ void __init s390_init_cpu_topology(void)
return;
machine_has_topology = 1;
if (facility_bits & (1ULL << 51))
machine_has_topology_irq = 1;
tl_info = alloc_bootmem_pages(PAGE_SIZE);
info = tl_info;
stsi(info, 15, 1, 2);
@ -312,7 +310,7 @@ void __init s390_init_cpu_topology(void)
for (i = 0; i < info->mnest - 2; i++)
nr_cores *= info->mag[NR_MAG - 3 - i];
printk(KERN_INFO "CPU topology:");
pr_info("The CPU configuration topology of the machine is:");
for (i = 0; i < NR_MAG; i++)
printk(" %d", info->mag[i]);
printk(" / %d\n", info->mnest);
@ -327,5 +325,4 @@ void __init s390_init_cpu_topology(void)
return;
error:
machine_has_topology = 0;
machine_has_topology_irq = 0;
}

234
arch/s390/kernel/vdso.c Normal file
View file

@ -0,0 +1,234 @@
/*
* vdso setup for s390
*
* Copyright IBM Corp. 2008
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (version 2 only)
* as published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/stddef.h>
#include <linux/unistd.h>
#include <linux/slab.h>
#include <linux/user.h>
#include <linux/elf.h>
#include <linux/security.h>
#include <linux/bootmem.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/processor.h>
#include <asm/mmu.h>
#include <asm/mmu_context.h>
#include <asm/sections.h>
#include <asm/vdso.h>
/* Max supported size for symbol names */
#define MAX_SYMNAME 64
#if defined(CONFIG_32BIT) || defined(CONFIG_COMPAT)
extern char vdso32_start, vdso32_end;
static void *vdso32_kbase = &vdso32_start;
static unsigned int vdso32_pages;
static struct page **vdso32_pagelist;
#endif
#ifdef CONFIG_64BIT
extern char vdso64_start, vdso64_end;
static void *vdso64_kbase = &vdso64_start;
static unsigned int vdso64_pages;
static struct page **vdso64_pagelist;
#endif /* CONFIG_64BIT */
/*
* Should the kernel map a VDSO page into processes and pass its
* address down to glibc upon exec()?
*/
unsigned int __read_mostly vdso_enabled = 1;
static int __init vdso_setup(char *s)
{
vdso_enabled = simple_strtoul(s, NULL, 0);
return 1;
}
__setup("vdso=", vdso_setup);
/*
* The vdso data page
*/
static union {
struct vdso_data data;
u8 page[PAGE_SIZE];
} vdso_data_store __attribute__((__section__(".data.page_aligned")));
struct vdso_data *vdso_data = &vdso_data_store.data;
/*
* This is called from binfmt_elf, we create the special vma for the
* vDSO and insert it into the mm struct tree
*/
int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
{
struct mm_struct *mm = current->mm;
struct page **vdso_pagelist;
unsigned long vdso_pages;
unsigned long vdso_base;
int rc;
if (!vdso_enabled)
return 0;
/*
* Only map the vdso for dynamically linked elf binaries.
*/
if (!uses_interp)
return 0;
vdso_base = mm->mmap_base;
#ifdef CONFIG_64BIT
vdso_pagelist = vdso64_pagelist;
vdso_pages = vdso64_pages;
#ifdef CONFIG_COMPAT
if (test_thread_flag(TIF_31BIT)) {
vdso_pagelist = vdso32_pagelist;
vdso_pages = vdso32_pages;
}
#endif
#else
vdso_pagelist = vdso32_pagelist;
vdso_pages = vdso32_pages;
#endif
/*
* vDSO has a problem and was disabled, just don't "enable" it for
* the process
*/
if (vdso_pages == 0)
return 0;
current->mm->context.vdso_base = 0;
/*
* pick a base address for the vDSO in process space. We try to put
* it at vdso_base which is the "natural" base for it, but we might
* fail and end up putting it elsewhere.
*/
down_write(&mm->mmap_sem);
vdso_base = get_unmapped_area(NULL, vdso_base,
vdso_pages << PAGE_SHIFT, 0, 0);
if (IS_ERR_VALUE(vdso_base)) {
rc = vdso_base;
goto out_up;
}
/*
* our vma flags don't have VM_WRITE so by default, the process
* isn't allowed to write those pages.
* gdb can break that with ptrace interface, and thus trigger COW
* on those pages but it's then your responsibility to never do that
* on the "data" page of the vDSO or you'll stop getting kernel
* updates and your nice userland gettimeofday will be totally dead.
* It's fine to use that for setting breakpoints in the vDSO code
* pages though
*
* Make sure the vDSO gets into every core dump.
* Dumping its contents makes post-mortem fully interpretable later
* without matching up the same kernel and hardware config to see
* what PC values meant.
*/
rc = install_special_mapping(mm, vdso_base, vdso_pages << PAGE_SHIFT,
VM_READ|VM_EXEC|
VM_MAYREAD|VM_MAYWRITE|VM_MAYEXEC|
VM_ALWAYSDUMP,
vdso_pagelist);
if (rc)
goto out_up;
/* Put vDSO base into mm struct */
current->mm->context.vdso_base = vdso_base;
up_write(&mm->mmap_sem);
return 0;
out_up:
up_write(&mm->mmap_sem);
return rc;
}
const char *arch_vma_name(struct vm_area_struct *vma)
{
if (vma->vm_mm && vma->vm_start == vma->vm_mm->context.vdso_base)
return "[vdso]";
return NULL;
}
static int __init vdso_init(void)
{
int i;
#if defined(CONFIG_32BIT) || defined(CONFIG_COMPAT)
/* Calculate the size of the 32 bit vDSO */
vdso32_pages = ((&vdso32_end - &vdso32_start
+ PAGE_SIZE - 1) >> PAGE_SHIFT) + 1;
/* Make sure pages are in the correct state */
vdso32_pagelist = kzalloc(sizeof(struct page *) * (vdso32_pages + 1),
GFP_KERNEL);
BUG_ON(vdso32_pagelist == NULL);
for (i = 0; i < vdso32_pages - 1; i++) {
struct page *pg = virt_to_page(vdso32_kbase + i*PAGE_SIZE);
ClearPageReserved(pg);
get_page(pg);
vdso32_pagelist[i] = pg;
}
vdso32_pagelist[vdso32_pages - 1] = virt_to_page(vdso_data);
vdso32_pagelist[vdso32_pages] = NULL;
#endif
#ifdef CONFIG_64BIT
/* Calculate the size of the 64 bit vDSO */
vdso64_pages = ((&vdso64_end - &vdso64_start
+ PAGE_SIZE - 1) >> PAGE_SHIFT) + 1;
/* Make sure pages are in the correct state */
vdso64_pagelist = kzalloc(sizeof(struct page *) * (vdso64_pages + 1),
GFP_KERNEL);
BUG_ON(vdso64_pagelist == NULL);
for (i = 0; i < vdso64_pages - 1; i++) {
struct page *pg = virt_to_page(vdso64_kbase + i*PAGE_SIZE);
ClearPageReserved(pg);
get_page(pg);
vdso64_pagelist[i] = pg;
}
vdso64_pagelist[vdso64_pages - 1] = virt_to_page(vdso_data);
vdso64_pagelist[vdso64_pages] = NULL;
#endif /* CONFIG_64BIT */
get_page(virt_to_page(vdso_data));
smp_wmb();
return 0;
}
arch_initcall(vdso_init);
int in_gate_area_no_task(unsigned long addr)
{
return 0;
}
int in_gate_area(struct task_struct *task, unsigned long addr)
{
return 0;
}
struct vm_area_struct *get_gate_vma(struct task_struct *tsk)
{
return NULL;
}

55
arch/s390/kernel/vdso32/Makefile Normal file
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# List of files in the vdso, has to be asm only for now
obj-vdso32 = gettimeofday.o clock_getres.o clock_gettime.o note.o
# Build rules
targets := $(obj-vdso32) vdso32.so vdso32.so.dbg
obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
KBUILD_AFLAGS_31 := $(filter-out -m64,$(KBUILD_AFLAGS))
KBUILD_AFLAGS_31 += -m31 -s
KBUILD_CFLAGS_31 := $(filter-out -m64,$(KBUILD_CFLAGS))
KBUILD_CFLAGS_31 += -m31 -fPIC -shared -fno-common -fno-builtin
KBUILD_CFLAGS_31 += -nostdlib -Wl,-soname=linux-vdso32.so.1 \
$(call ld-option, -Wl$(comma)--hash-style=sysv)
$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_31)
$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_31)
obj-y += vdso32_wrapper.o
extra-y += vdso32.lds
CPPFLAGS_vdso32.lds += -P -C -U$(ARCH)
# Force dependency (incbin is bad)
$(obj)/vdso32_wrapper.o : $(obj)/vdso32.so
# link rule for the .so file, .lds has to be first
$(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32)
$(call if_changed,vdso32ld)
# strip rule for the .so file
$(obj)/%.so: OBJCOPYFLAGS := -S
$(obj)/%.so: $(obj)/%.so.dbg FORCE
$(call if_changed,objcopy)
# assembly rules for the .S files
$(obj-vdso32): %.o: %.S
$(call if_changed_dep,vdso32as)
# actual build commands
quiet_cmd_vdso32ld = VDSO32L $@
cmd_vdso32ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
quiet_cmd_vdso32as = VDSO32A $@
cmd_vdso32as = $(CC) $(a_flags) -c -o $@ $<
# install commands for the unstripped file
quiet_cmd_vdso_install = INSTALL $@
cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
vdso32.so: $(obj)/vdso32.so.dbg
@mkdir -p $(MODLIB)/vdso
$(call cmd,vdso_install)
vdso_install: vdso32.so

39
arch/s390/kernel/vdso32/clock_getres.S Normal file
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/*
* Userland implementation of clock_getres() for 32 bits processes in a
* s390 kernel for use in the vDSO
*
* Copyright IBM Corp. 2008
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (version 2 only)
* as published by the Free Software Foundation.
*/
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
.text
.align 4
.globl __kernel_clock_getres
.type __kernel_clock_getres,@function
__kernel_clock_getres:
.cfi_startproc
chi %r2,CLOCK_REALTIME
je 0f
chi %r2,CLOCK_MONOTONIC
jne 3f
0: ltr %r3,%r3
jz 2f /* res == NULL */
basr %r1,0
1: l %r0,4f-1b(%r1)
xc 0(4,%r3),0(%r3) /* set tp->tv_sec to zero */
st %r0,4(%r3) /* store tp->tv_usec */
2: lhi %r2,0
br %r14
3: lhi %r1,__NR_clock_getres /* fallback to svc */
svc 0
br %r14
4: .long CLOCK_REALTIME_RES
.cfi_endproc
.size __kernel_clock_getres,.-__kernel_clock_getres

128
arch/s390/kernel/vdso32/clock_gettime.S Normal file
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/*
* Userland implementation of clock_gettime() for 32 bits processes in a
* s390 kernel for use in the vDSO
*
* Copyright IBM Corp. 2008
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (version 2 only)
* as published by the Free Software Foundation.
*/
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
.text
.align 4
.globl __kernel_clock_gettime
.type __kernel_clock_gettime,@function
__kernel_clock_gettime:
.cfi_startproc
basr %r5,0
0: al %r5,21f-0b(%r5) /* get &_vdso_data */
chi %r2,CLOCK_REALTIME
je 10f
chi %r2,CLOCK_MONOTONIC
jne 19f
/* CLOCK_MONOTONIC */
ltr %r3,%r3
jz 9f /* tp == NULL */
1: l %r4,__VDSO_UPD_COUNT+4(%r5) /* load update counter */
tml %r4,0x0001 /* pending update ? loop */
jnz 1b
stck 24(%r15) /* Store TOD clock */
lm %r0,%r1,24(%r15)
s %r0,__VDSO_XTIME_STAMP(%r5) /* TOD - cycle_last */
sl %r1,__VDSO_XTIME_STAMP+4(%r5)
brc 3,2f
ahi %r0,-1
2: mhi %r0,1000 /* cyc2ns(clock,cycle_delta) */
lr %r2,%r0
lhi %r0,1000
ltr %r1,%r1
mr %r0,%r0
jnm 3f
ahi %r0,1000
3: alr %r0,%r2
srdl %r0,12
al %r0,__VDSO_XTIME_NSEC(%r5) /* + xtime */
al %r1,__VDSO_XTIME_NSEC+4(%r5)
brc 12,4f
ahi %r0,1
4: l %r2,__VDSO_XTIME_SEC+4(%r5)
al %r0,__VDSO_WTOM_NSEC(%r5) /* + wall_to_monotonic */
al %r1,__VDSO_WTOM_NSEC+4(%r5)
brc 12,5f
ahi %r0,1
5: al %r2,__VDSO_WTOM_SEC+4(%r5)
cl %r4,__VDSO_UPD_COUNT+4(%r5) /* check update counter */
jne 1b
basr %r5,0
6: ltr %r0,%r0
jnz 7f
cl %r1,20f-6b(%r5)
jl 8f
7: ahi %r2,1
sl %r1,20f-6b(%r5)
brc 3,6b
ahi %r0,-1
j 6b
8: st %r2,0(%r3) /* store tp->tv_sec */
st %r1,4(%r3) /* store tp->tv_nsec */
9: lhi %r2,0
br %r14
/* CLOCK_REALTIME */
10: ltr %r3,%r3 /* tp == NULL */
jz 18f
11: l %r4,__VDSO_UPD_COUNT+4(%r5) /* load update counter */
tml %r4,0x0001 /* pending update ? loop */
jnz 11b
stck 24(%r15) /* Store TOD clock */
lm %r0,%r1,24(%r15)
s %r0,__VDSO_XTIME_STAMP(%r5) /* TOD - cycle_last */
sl %r1,__VDSO_XTIME_STAMP+4(%r5)
brc 3,12f
ahi %r0,-1
12: mhi %r0,1000 /* cyc2ns(clock,cycle_delta) */
lr %r2,%r0
lhi %r0,1000
ltr %r1,%r1
mr %r0,%r0
jnm 13f
ahi %r0,1000
13: alr %r0,%r2
srdl %r0,12
al %r0,__VDSO_XTIME_NSEC(%r5) /* + xtime */
al %r1,__VDSO_XTIME_NSEC+4(%r5)
brc 12,14f
ahi %r0,1
14: l %r2,__VDSO_XTIME_SEC+4(%r5)
cl %r4,__VDSO_UPD_COUNT+4(%r5) /* check update counter */
jne 11b
basr %r5,0
15: ltr %r0,%r0
jnz 16f
cl %r1,20f-15b(%r5)
jl 17f
16: ahi %r2,1
sl %r1,20f-15b(%r5)
brc 3,15b
ahi %r0,-1
j 15b
17: st %r2,0(%r3) /* store tp->tv_sec */
st %r1,4(%r3) /* store tp->tv_nsec */
18: lhi %r2,0
br %r14
/* Fallback to system call */
19: lhi %r1,__NR_clock_gettime
svc 0
br %r14
20: .long 1000000000
21: .long _vdso_data - 0b
.cfi_endproc
.size __kernel_clock_gettime,.-__kernel_clock_gettime

82
arch/s390/kernel/vdso32/gettimeofday.S Normal file
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/*
* Userland implementation of gettimeofday() for 32 bits processes in a
* s390 kernel for use in the vDSO
*
* Copyright IBM Corp. 2008
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (version 2 only)
* as published by the Free Software Foundation.
*/
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
.text
.align 4
.globl __kernel_gettimeofday
.type __kernel_gettimeofday,@function
__kernel_gettimeofday:
.cfi_startproc
basr %r5,0
0: al %r5,13f-0b(%r5) /* get &_vdso_data */
1: ltr %r3,%r3 /* check if tz is NULL */
je 2f
mvc 0(8,%r3),__VDSO_TIMEZONE(%r5)
2: ltr %r2,%r2 /* check if tv is NULL */
je 10f
l %r4,__VDSO_UPD_COUNT+4(%r5) /* load update counter */
tml %r4,0x0001 /* pending update ? loop */
jnz 1b
stck 24(%r15) /* Store TOD clock */
lm %r0,%r1,24(%r15)
s %r0,__VDSO_XTIME_STAMP(%r5) /* TOD - cycle_last */
sl %r1,__VDSO_XTIME_STAMP+4(%r5)
brc 3,3f
ahi %r0,-1
3: mhi %r0,1000 /* cyc2ns(clock,cycle_delta) */
st %r0,24(%r15)
lhi %r0,1000
ltr %r1,%r1
mr %r0,%r0
jnm 4f
ahi %r0,1000
4: al %r0,24(%r15)
srdl %r0,12
al %r0,__VDSO_XTIME_NSEC(%r5) /* + xtime */
al %r1,__VDSO_XTIME_NSEC+4(%r5)
brc 12,5f
ahi %r0,1
5: mvc 24(4,%r15),__VDSO_XTIME_SEC+4(%r5)
cl %r4,__VDSO_UPD_COUNT+4(%r5) /* check update counter */
jne 1b
l %r4,24(%r15) /* get tv_sec from stack */
basr %r5,0
6: ltr %r0,%r0
jnz 7f
cl %r1,11f-6b(%r5)
jl 8f
7: ahi %r4,1
sl %r1,11f-6b(%r5)
brc 3,6b
ahi %r0,-1
j 6b
8: st %r4,0(%r2) /* store tv->tv_sec */
ltr %r1,%r1
m %r0,12f-6b(%r5)
jnm 9f
al %r0,12f-6b(%r5)
9: srl %r0,6
st %r0,4(%r2) /* store tv->tv_usec */
10: slr %r2,%r2
br %r14
11: .long 1000000000
12: .long 274877907
13: .long _vdso_data - 0b
.cfi_endproc
.size __kernel_gettimeofday,.-__kernel_gettimeofday

12
arch/s390/kernel/vdso32/note.S Normal file
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/*
* This supplies .note.* sections to go into the PT_NOTE inside the vDSO text.
* Here we can supply some information useful to userland.
*/
#include <linux/uts.h>
#include <linux/version.h>
#include <linux/elfnote.h>
ELFNOTE_START(Linux, 0, "a")
.long LINUX_VERSION_CODE
ELFNOTE_END

138
arch/s390/kernel/vdso32/vdso32.lds.S Normal file
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/*
* This is the infamous ld script for the 32 bits vdso
* library
*/
#include <asm/vdso.h>
OUTPUT_FORMAT("elf32-s390", "elf32-s390", "elf32-s390")
OUTPUT_ARCH(s390:31-bit)
ENTRY(_start)
SECTIONS
{
. = VDSO32_LBASE + SIZEOF_HEADERS;
.hash : { *(.hash) } :text
.gnu.hash : { *(.gnu.hash) }
.dynsym : { *(.dynsym) }
.dynstr : { *(.dynstr) }
.gnu.version : { *(.gnu.version) }
.gnu.version_d : { *(.gnu.version_d) }
.gnu.version_r : { *(.gnu.version_r) }
.note : { *(.note.*) } :text :note
. = ALIGN(16);
.text : {
*(.text .stub .text.* .gnu.linkonce.t.*)
} :text
PROVIDE(__etext = .);
PROVIDE(_etext = .);
PROVIDE(etext = .);
/*
* Other stuff is appended to the text segment:
*/
.rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
.rodata1 : { *(.rodata1) }
.dynamic : { *(.dynamic) } :text :dynamic
.eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr
.eh_frame : { KEEP (*(.eh_frame)) } :text
.gcc_except_table : { *(.gcc_except_table .gcc_except_table.*) }
.rela.dyn ALIGN(8) : { *(.rela.dyn) }
.got ALIGN(8) : { *(.got .toc) }
_end = .;
PROVIDE(end = .);
/*
* Stabs debugging sections are here too.
*/
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
/*
* DWARF debug sections.
* Symbols in the DWARF debugging sections are relative to the
* beginning of the section so we begin them at 0.
*/
/* DWARF 1 */
.debug 0 : { *(.debug) }
.line 0 : { *(.line) }
/* GNU DWARF 1 extensions */
.debug_srcinfo 0 : { *(.debug_srcinfo) }
.debug_sfnames 0 : { *(.debug_sfnames) }
/* DWARF 1.1 and DWARF 2 */
.debug_aranges 0 : { *(.debug_aranges) }
.debug_pubnames 0 : { *(.debug_pubnames) }
/* DWARF 2 */
.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
.debug_abbrev 0 : { *(.debug_abbrev) }
.debug_line 0 : { *(.debug_line) }
.debug_frame 0 : { *(.debug_frame) }
.debug_str 0 : { *(.debug_str) }
.debug_loc 0 : { *(.debug_loc) }
.debug_macinfo 0 : { *(.debug_macinfo) }
/* SGI/MIPS DWARF 2 extensions */
.debug_weaknames 0 : { *(.debug_weaknames) }
.debug_funcnames 0 : { *(.debug_funcnames) }
.debug_typenames 0 : { *(.debug_typenames) }
.debug_varnames 0 : { *(.debug_varnames) }
/* DWARF 3 */
.debug_pubtypes 0 : { *(.debug_pubtypes) }
.debug_ranges 0 : { *(.debug_ranges) }
.gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
. = ALIGN(4096);
PROVIDE(_vdso_data = .);
/DISCARD/ : {
*(.note.GNU-stack)
*(.branch_lt)
*(.data .data.* .gnu.linkonce.d.* .sdata*)
*(.bss .sbss .dynbss .dynsbss)
}
}
/*
* Very old versions of ld do not recognize this name token; use the constant.
*/
#define PT_GNU_EH_FRAME 0x6474e550
/*
* We must supply the ELF program headers explicitly to get just one
* PT_LOAD segment, and set the flags explicitly to make segments read-only.
*/
PHDRS
{
text PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
note PT_NOTE FLAGS(4); /* PF_R */
eh_frame_hdr PT_GNU_EH_FRAME;
}
/*
* This controls what symbols we export from the DSO.
*/
VERSION
{
VDSO_VERSION_STRING {
global:
/*
* Has to be there for the kernel to find
*/
__kernel_gettimeofday;
__kernel_clock_gettime;
__kernel_clock_getres;
local: *;
};
}

13
arch/s390/kernel/vdso32/vdso32_wrapper.S Normal file
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@ -0,0 +1,13 @@
#include <linux/init.h>
#include <asm/page.h>
.section ".data.page_aligned"
.globl vdso32_start, vdso32_end
.balign PAGE_SIZE
vdso32_start:
.incbin "arch/s390/kernel/vdso32/vdso32.so"
.balign PAGE_SIZE
vdso32_end:
.previous

55
arch/s390/kernel/vdso64/Makefile Normal file
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# List of files in the vdso, has to be asm only for now
obj-vdso64 = gettimeofday.o clock_getres.o clock_gettime.o note.o
# Build rules
targets := $(obj-vdso64) vdso64.so vdso64.so.dbg
obj-vdso64 := $(addprefix $(obj)/, $(obj-vdso64))
KBUILD_AFLAGS_64 := $(filter-out -m64,$(KBUILD_AFLAGS))
KBUILD_AFLAGS_64 += -m64 -s
KBUILD_CFLAGS_64 := $(filter-out -m64,$(KBUILD_CFLAGS))
KBUILD_CFLAGS_64 += -m64 -fPIC -shared -fno-common -fno-builtin
KBUILD_CFLAGS_64 += -nostdlib -Wl,-soname=linux-vdso64.so.1 \
$(call ld-option, -Wl$(comma)--hash-style=sysv)
$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_64)
$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_64)
obj-y += vdso64_wrapper.o
extra-y += vdso64.lds
CPPFLAGS_vdso64.lds += -P -C -U$(ARCH)
# Force dependency (incbin is bad)
$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
# link rule for the .so file, .lds has to be first
$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64)
$(call if_changed,vdso64ld)
# strip rule for the .so file
$(obj)/%.so: OBJCOPYFLAGS := -S
$(obj)/%.so: $(obj)/%.so.dbg FORCE
$(call if_changed,objcopy)
# assembly rules for the .S files
$(obj-vdso64): %.o: %.S
$(call if_changed_dep,vdso64as)
# actual build commands
quiet_cmd_vdso64ld = VDSO64L $@
cmd_vdso64ld = $(CC) $(c_flags) -Wl,-T $^ -o $@
quiet_cmd_vdso64as = VDSO64A $@
cmd_vdso64as = $(CC) $(a_flags) -c -o $@ $<
# install commands for the unstripped file
quiet_cmd_vdso_install = INSTALL $@
cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
vdso64.so: $(obj)/vdso64.so.dbg
@mkdir -p $(MODLIB)/vdso
$(call cmd,vdso_install)
vdso_install: vdso64.so

39
arch/s390/kernel/vdso64/clock_getres.S Normal file
View file

@ -0,0 +1,39 @@
/*
* Userland implementation of clock_getres() for 64 bits processes in a
* s390 kernel for use in the vDSO
*
* Copyright IBM Corp. 2008
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (version 2 only)
* as published by the Free Software Foundation.
*/
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
.text
.align 4
.globl __kernel_clock_getres
.type __kernel_clock_getres,@function
__kernel_clock_getres:
.cfi_startproc
cghi %r2,CLOCK_REALTIME
je 0f
cghi %r2,CLOCK_MONOTONIC
jne 2f
0: ltgr %r3,%r3
jz 1f /* res == NULL */
larl %r1,3f
lg %r0,0(%r1)
xc 0(8,%r3),0(%r3) /* set tp->tv_sec to zero */
stg %r0,8(%r3) /* store tp->tv_usec */
1: lghi %r2,0
br %r14
2: lghi %r1,__NR_clock_getres /* fallback to svc */
svc 0
br %r14
3: .quad CLOCK_REALTIME_RES
.cfi_endproc
.size __kernel_clock_getres,.-__kernel_clock_getres

89
arch/s390/kernel/vdso64/clock_gettime.S Normal file
View file

@ -0,0 +1,89 @@
/*
* Userland implementation of clock_gettime() for 64 bits processes in a
* s390 kernel for use in the vDSO
*
* Copyright IBM Corp. 2008
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (version 2 only)
* as published by the Free Software Foundation.
*/
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
.text
.align 4
.globl __kernel_clock_gettime
.type __kernel_clock_gettime,@function
__kernel_clock_gettime:
.cfi_startproc
larl %r5,_vdso_data
cghi %r2,CLOCK_REALTIME
je 4f
cghi %r2,CLOCK_MONOTONIC
jne 9f
/* CLOCK_MONOTONIC */
ltgr %r3,%r3
jz 3f /* tp == NULL */
0: lg %r4,__VDSO_UPD_COUNT(%r5) /* load update counter */
tmll %r4,0x0001 /* pending update ? loop */
jnz 0b
stck 48(%r15) /* Store TOD clock */
lg %r1,48(%r15)
sg %r1,__VDSO_XTIME_STAMP(%r5) /* TOD - cycle_last */
mghi %r1,1000
srlg %r1,%r1,12 /* cyc2ns(clock,cycle_delta) */
alg %r1,__VDSO_XTIME_NSEC(%r5) /* + xtime */
lg %r0,__VDSO_XTIME_SEC(%r5)
alg %r1,__VDSO_WTOM_NSEC(%r5) /* + wall_to_monotonic */
alg %r0,__VDSO_WTOM_SEC(%r5)
clg %r4,__VDSO_UPD_COUNT(%r5) /* check update counter */
jne 0b
larl %r5,10f
1: clg %r1,0(%r5)
jl 2f
slg %r1,0(%r5)
aghi %r0,1
j 1b
2: stg %r0,0(%r3) /* store tp->tv_sec */
stg %r1,8(%r3) /* store tp->tv_nsec */
3: lghi %r2,0
br %r14
/* CLOCK_REALTIME */
4: ltr %r3,%r3 /* tp == NULL */
jz 8f
5: lg %r4,__VDSO_UPD_COUNT(%r5) /* load update counter */
tmll %r4,0x0001 /* pending update ? loop */
jnz 5b
stck 48(%r15) /* Store TOD clock */
lg %r1,48(%r15)
sg %r1,__VDSO_XTIME_STAMP(%r5) /* TOD - cycle_last */
mghi %r1,1000
srlg %r1,%r1,12 /* cyc2ns(clock,cycle_delta) */
alg %r1,__VDSO_XTIME_NSEC(%r5) /* + xtime */
lg %r0,__VDSO_XTIME_SEC(%r5)
clg %r4,__VDSO_UPD_COUNT(%r5) /* check update counter */
jne 5b
larl %r5,10f
6: clg %r1,0(%r5)
jl 7f
slg %r1,0(%r5)
aghi %r0,1
j 6b
7: stg %r0,0(%r3) /* store tp->tv_sec */
stg %r1,8(%r3) /* store tp->tv_nsec */
8: lghi %r2,0
br %r14
/* Fallback to system call */
9: lghi %r1,__NR_clock_gettime
svc 0
br %r14
10: .quad 1000000000
.cfi_endproc
.size __kernel_clock_gettime,.-__kernel_clock_gettime

56
arch/s390/kernel/vdso64/gettimeofday.S Normal file
View file

@ -0,0 +1,56 @@
/*
* Userland implementation of gettimeofday() for 64 bits processes in a
* s390 kernel for use in the vDSO
*
* Copyright IBM Corp. 2008
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (version 2 only)
* as published by the Free Software Foundation.
*/
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
.text
.align 4
.globl __kernel_gettimeofday
.type __kernel_gettimeofday,@function
__kernel_gettimeofday:
.cfi_startproc
larl %r5,_vdso_data
0: ltgr %r3,%r3 /* check if tz is NULL */
je 1f
mvc 0(8,%r3),__VDSO_TIMEZONE(%r5)
1: ltgr %r2,%r2 /* check if tv is NULL */
je 4f
lg %r4,__VDSO_UPD_COUNT(%r5) /* load update counter */
tmll %r4,0x0001 /* pending update ? loop */
jnz 0b
stck 48(%r15) /* Store TOD clock */
lg %r1,48(%r15)
sg %r1,__VDSO_XTIME_STAMP(%r5) /* TOD - cycle_last */
mghi %r1,1000
srlg %r1,%r1,12 /* cyc2ns(clock,cycle_delta) */
alg %r1,__VDSO_XTIME_NSEC(%r5) /* + xtime.tv_nsec */
lg %r0,__VDSO_XTIME_SEC(%r5) /* xtime.tv_sec */
clg %r4,__VDSO_UPD_COUNT(%r5) /* check update counter */
jne 0b
larl %r5,5f
2: clg %r1,0(%r5)
jl 3f
slg %r1,0(%r5)
aghi %r0,1
j 2b
3: stg %r0,0(%r2) /* store tv->tv_sec */
slgr %r0,%r0 /* tv_nsec -> tv_usec */
ml %r0,8(%r5)
srlg %r0,%r0,6
stg %r0,8(%r2) /* store tv->tv_usec */
4: lghi %r2,0
br %r14
5: .quad 1000000000
.long 274877907
.cfi_endproc
.size __kernel_gettimeofday,.-__kernel_gettimeofday

12
arch/s390/kernel/vdso64/note.S Normal file
View file

@ -0,0 +1,12 @@
/*
* This supplies .note.* sections to go into the PT_NOTE inside the vDSO text.
* Here we can supply some information useful to userland.
*/
#include <linux/uts.h>
#include <linux/version.h>
#include <linux/elfnote.h>
ELFNOTE_START(Linux, 0, "a")
.long LINUX_VERSION_CODE
ELFNOTE_END

138
arch/s390/kernel/vdso64/vdso64.lds.S Normal file
View file

@ -0,0 +1,138 @@
/*
* This is the infamous ld script for the 64 bits vdso
* library
*/
#include <asm/vdso.h>
OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
OUTPUT_ARCH(s390:64-bit)
ENTRY(_start)
SECTIONS
{
. = VDSO64_LBASE + SIZEOF_HEADERS;
.hash : { *(.hash) } :text
.gnu.hash : { *(.gnu.hash) }
.dynsym : { *(.dynsym) }
.dynstr : { *(.dynstr) }
.gnu.version : { *(.gnu.version) }
.gnu.version_d : { *(.gnu.version_d) }
.gnu.version_r : { *(.gnu.version_r) }
.note : { *(.note.*) } :text :note
. = ALIGN(16);
.text : {
*(.text .stub .text.* .gnu.linkonce.t.*)
} :text
PROVIDE(__etext = .);
PROVIDE(_etext = .);
PROVIDE(etext = .);
/*
* Other stuff is appended to the text segment:
*/
.rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
.rodata1 : { *(.rodata1) }
.dynamic : { *(.dynamic) } :text :dynamic
.eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr
.eh_frame : { KEEP (*(.eh_frame)) } :text
.gcc_except_table : { *(.gcc_except_table .gcc_except_table.*) }
.rela.dyn ALIGN(8) : { *(.rela.dyn) }
.got ALIGN(8) : { *(.got .toc) }
_end = .;
PROVIDE(end = .);
/*
* Stabs debugging sections are here too.
*/
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
/*
* DWARF debug sections.
* Symbols in the DWARF debugging sections are relative to the
* beginning of the section so we begin them at 0.
*/
/* DWARF 1 */
.debug 0 : { *(.debug) }
.line 0 : { *(.line) }
/* GNU DWARF 1 extensions */
.debug_srcinfo 0 : { *(.debug_srcinfo) }
.debug_sfnames 0 : { *(.debug_sfnames) }
/* DWARF 1.1 and DWARF 2 */
.debug_aranges 0 : { *(.debug_aranges) }
.debug_pubnames 0 : { *(.debug_pubnames) }
/* DWARF 2 */
.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
.debug_abbrev 0 : { *(.debug_abbrev) }
.debug_line 0 : { *(.debug_line) }
.debug_frame 0 : { *(.debug_frame) }
.debug_str 0 : { *(.debug_str) }
.debug_loc 0 : { *(.debug_loc) }
.debug_macinfo 0 : { *(.debug_macinfo) }
/* SGI/MIPS DWARF 2 extensions */
.debug_weaknames 0 : { *(.debug_weaknames) }
.debug_funcnames 0 : { *(.debug_funcnames) }
.debug_typenames 0 : { *(.debug_typenames) }
.debug_varnames 0 : { *(.debug_varnames) }
/* DWARF 3 */
.debug_pubtypes 0 : { *(.debug_pubtypes) }
.debug_ranges 0 : { *(.debug_ranges) }
.gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
. = ALIGN(4096);
PROVIDE(_vdso_data = .);
/DISCARD/ : {
*(.note.GNU-stack)
*(.branch_lt)
*(.data .data.* .gnu.linkonce.d.* .sdata*)
*(.bss .sbss .dynbss .dynsbss)
}
}
/*
* Very old versions of ld do not recognize this name token; use the constant.
*/
#define PT_GNU_EH_FRAME 0x6474e550
/*
* We must supply the ELF program headers explicitly to get just one
* PT_LOAD segment, and set the flags explicitly to make segments read-only.
*/
PHDRS
{
text PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
note PT_NOTE FLAGS(4); /* PF_R */
eh_frame_hdr PT_GNU_EH_FRAME;
}
/*
* This controls what symbols we export from the DSO.
*/
VERSION
{
VDSO_VERSION_STRING {
global:
/*
* Has to be there for the kernel to find
*/
__kernel_gettimeofday;
__kernel_clock_gettime;
__kernel_clock_getres;
local: *;
};
}

13
arch/s390/kernel/vdso64/vdso64_wrapper.S Normal file
View file

@ -0,0 +1,13 @@
#include <linux/init.h>
#include <asm/page.h>
.section ".data.page_aligned"
.globl vdso64_start, vdso64_end
.balign PAGE_SIZE
vdso64_start:
.incbin "arch/s390/kernel/vdso64/vdso64.so"
.balign PAGE_SIZE
vdso64_end:
.previous

11
arch/s390/kernel/vtime.c
View file

@ -27,7 +27,6 @@
static ext_int_info_t ext_int_info_timer;
static DEFINE_PER_CPU(struct vtimer_queue, virt_cpu_timer);
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
/*
* Update process times based on virtual cpu times stored by entry.S
* to the lowcore fields user_timer, system_timer & steal_clock.
@ -125,16 +124,6 @@ static inline void set_vtimer(__u64 expires)
/* store expire time for this CPU timer */
__get_cpu_var(virt_cpu_timer).to_expire = expires;
}
#else
static inline void set_vtimer(__u64 expires)
{
S390_lowcore.last_update_timer = expires;
asm volatile ("SPT %0" : : "m" (S390_lowcore.last_update_timer));
/* store expire time for this CPU timer */
__get_cpu_var(virt_cpu_timer).to_expire = expires;
}
#endif
void vtime_start_cpu_timer(void)
{

106
arch/s390/mm/extmem.c
View file

@ -7,6 +7,9 @@
* (C) IBM Corporation 2002-2004
*/
#define KMSG_COMPONENT "extmem"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/spinlock.h>
@ -24,19 +27,6 @@
#include <asm/cpcmd.h>
#include <asm/setup.h>
#define DCSS_DEBUG /* Debug messages on/off */
#define DCSS_NAME "extmem"
#ifdef DCSS_DEBUG
#define PRINT_DEBUG(x...) printk(KERN_DEBUG DCSS_NAME " debug:" x)
#else
#define PRINT_DEBUG(x...) do {} while (0)
#endif
#define PRINT_INFO(x...) printk(KERN_INFO DCSS_NAME " info:" x)
#define PRINT_WARN(x...) printk(KERN_WARNING DCSS_NAME " warning:" x)
#define PRINT_ERR(x...) printk(KERN_ERR DCSS_NAME " error:" x)
#define DCSS_LOADSHR 0x00
#define DCSS_LOADNSR 0x04
#define DCSS_PURGESEG 0x08
@ -286,7 +276,7 @@ query_segment_type (struct dcss_segment *seg)
goto out_free;
}
if (diag_cc > 1) {
PRINT_WARN ("segment_type: diag returned error %ld\n", vmrc);
pr_warning("Querying a DCSS type failed with rc=%ld\n", vmrc);
rc = dcss_diag_translate_rc (vmrc);
goto out_free;
}
@ -368,7 +358,6 @@ query_segment_type (struct dcss_segment *seg)
* -EIO : could not perform query diagnose
* -ENOENT : no such segment
* -ENOTSUPP: multi-part segment cannot be used with linux
* -ENOSPC : segment cannot be used (overlaps with storage)
* -ENOMEM : out of memory
* 0 .. 6 : type of segment as defined in include/asm-s390/extmem.h
*/
@ -480,9 +469,8 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long
goto out_resource;
}
if (diag_cc > 1) {
PRINT_WARN ("segment_load: could not load segment %s - "
"diag returned error (%ld)\n",
name, end_addr);
pr_warning("Loading DCSS %s failed with rc=%ld\n", name,
end_addr);
rc = dcss_diag_translate_rc(end_addr);
dcss_diag(&purgeseg_scode, seg->dcss_name,
&dummy, &dummy);
@ -496,15 +484,13 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long
*addr = seg->start_addr;
*end = seg->end;
if (do_nonshared)
PRINT_INFO ("segment_load: loaded segment %s range %p .. %p "
"type %s in non-shared mode\n", name,
(void*)seg->start_addr, (void*)seg->end,
segtype_string[seg->vm_segtype]);
pr_info("DCSS %s of range %p to %p and type %s loaded as "
"exclusive-writable\n", name, (void*) seg->start_addr,
(void*) seg->end, segtype_string[seg->vm_segtype]);
else {
PRINT_INFO ("segment_load: loaded segment %s range %p .. %p "
"type %s in shared mode\n", name,
(void*)seg->start_addr, (void*)seg->end,
segtype_string[seg->vm_segtype]);
pr_info("DCSS %s of range %p to %p and type %s loaded in "
"shared access mode\n", name, (void*) seg->start_addr,
(void*) seg->end, segtype_string[seg->vm_segtype]);
}
goto out;
out_resource:
@ -593,14 +579,14 @@ segment_modify_shared (char *name, int do_nonshared)
goto out_unlock;
}
if (do_nonshared == seg->do_nonshared) {
PRINT_INFO ("segment_modify_shared: not reloading segment %s"
" - already in requested mode\n",name);
pr_info("DCSS %s is already in the requested access "
"mode\n", name);
rc = 0;
goto out_unlock;
}
if (atomic_read (&seg->ref_count) != 1) {
PRINT_WARN ("segment_modify_shared: not reloading segment %s - "
"segment is in use by other driver(s)\n",name);
pr_warning("DCSS %s is in use and cannot be reloaded\n",
name);
rc = -EAGAIN;
goto out_unlock;
}
@ -613,8 +599,8 @@ segment_modify_shared (char *name, int do_nonshared)
seg->res->flags |= IORESOURCE_READONLY;
if (request_resource(&iomem_resource, seg->res)) {
PRINT_WARN("segment_modify_shared: could not reload segment %s"
" - overlapping resources\n", name);
pr_warning("DCSS %s overlaps with used memory resources "
"and cannot be reloaded\n", name);
rc = -EBUSY;
kfree(seg->res);
goto out_del_mem;
@ -632,9 +618,8 @@ segment_modify_shared (char *name, int do_nonshared)
goto out_del_res;
}
if (diag_cc > 1) {
PRINT_WARN ("segment_modify_shared: could not reload segment %s"
" - diag returned error (%ld)\n",
name, end_addr);
pr_warning("Reloading DCSS %s failed with rc=%ld\n", name,
end_addr);
rc = dcss_diag_translate_rc(end_addr);
goto out_del_res;
}
@ -673,8 +658,7 @@ segment_unload(char *name)
mutex_lock(&dcss_lock);
seg = segment_by_name (name);
if (seg == NULL) {
PRINT_ERR ("could not find segment %s in segment_unload, "
"please report to linux390@de.ibm.com\n",name);
pr_err("Unloading unknown DCSS %s failed\n", name);
goto out_unlock;
}
if (atomic_dec_return(&seg->ref_count) != 0)
@ -709,8 +693,7 @@ segment_save(char *name)
seg = segment_by_name (name);
if (seg == NULL) {
PRINT_ERR("could not find segment %s in segment_save, please "
"report to linux390@de.ibm.com\n", name);
pr_err("Saving unknown DCSS %s failed\n", name);
goto out;
}
@ -727,14 +710,14 @@ segment_save(char *name)
response = 0;
cpcmd(cmd1, NULL, 0, &response);
if (response) {
PRINT_ERR("segment_save: DEFSEG failed with response code %i\n",
response);
pr_err("Saving a DCSS failed with DEFSEG response code "
"%i\n", response);
goto out;
}
cpcmd(cmd2, NULL, 0, &response);
if (response) {
PRINT_ERR("segment_save: SAVESEG failed with response code %i\n",
response);
pr_err("Saving a DCSS failed with SAVESEG response code "
"%i\n", response);
goto out;
}
out:
@ -749,44 +732,41 @@ void segment_warning(int rc, char *seg_name)
{
switch (rc) {
case -ENOENT:
PRINT_WARN("cannot load/query segment %s, "
"does not exist\n", seg_name);
pr_err("DCSS %s cannot be loaded or queried\n", seg_name);
break;
case -ENOSYS:
PRINT_WARN("cannot load/query segment %s, "
"not running on VM\n", seg_name);
pr_err("DCSS %s cannot be loaded or queried without "
"z/VM\n", seg_name);
break;
case -EIO:
PRINT_WARN("cannot load/query segment %s, "
"hardware error\n", seg_name);
pr_err("Loading or querying DCSS %s resulted in a "
"hardware error\n", seg_name);
break;
case -ENOTSUPP:
PRINT_WARN("cannot load/query segment %s, "
"is a multi-part segment\n", seg_name);
pr_err("DCSS %s has multiple page ranges and cannot be "
"loaded or queried\n", seg_name);
break;
case -ENOSPC:
PRINT_WARN("cannot load/query segment %s, "
"overlaps with storage\n", seg_name);
pr_err("DCSS %s overlaps with used storage and cannot "
"be loaded\n", seg_name);
break;
case -EBUSY:
PRINT_WARN("cannot load/query segment %s, "
"overlaps with already loaded dcss\n", seg_name);
pr_err("%s needs used memory resources and cannot be "
"loaded or queried\n", seg_name);
break;
case -EPERM:
PRINT_WARN("cannot load/query segment %s, "
"already loaded in incompatible mode\n", seg_name);
pr_err("DCSS %s is already loaded in a different access "
"mode\n", seg_name);
break;
case -ENOMEM:
PRINT_WARN("cannot load/query segment %s, "
"out of memory\n", seg_name);
pr_err("There is not enough memory to load or query "
"DCSS %s\n", seg_name);
break;
case -ERANGE:
PRINT_WARN("cannot load/query segment %s, "
"exceeds kernel mapping range\n", seg_name);
pr_err("DCSS %s exceeds the kernel mapping range (%lu) "
"and cannot be loaded\n", seg_name, VMEM_MAX_PHYS);
break;
default:
PRINT_WARN("cannot load/query segment %s, "
"return value %i\n", seg_name, rc);
break;
}
}

2
arch/sh/include/asm/elf.h
View file

@ -202,7 +202,7 @@ do { \
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
struct linux_binprm;
extern int arch_setup_additional_pages(struct linux_binprm *bprm,
int executable_stack);
int uses_interp);
extern unsigned int vdso_enabled;
extern void __kernel_vsyscall;

3
arch/sh/kernel/vsyscall/vsyscall.c
View file

@ -59,8 +59,7 @@ int __init vsyscall_init(void)
}
/* Setup a VMA at program startup for the vsyscall page */
int arch_setup_additional_pages(struct linux_binprm *bprm,
int executable_stack)
int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
{
struct mm_struct *mm = current->mm;
unsigned long addr;

2
arch/x86/include/asm/elf.h
View file

@ -325,7 +325,7 @@ struct linux_binprm;
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
extern int arch_setup_additional_pages(struct linux_binprm *bprm,
int executable_stack);
int uses_interp);
extern int syscall32_setup_pages(struct linux_binprm *, int exstack);
#define compat_arch_setup_additional_pages syscall32_setup_pages

2
arch/x86/vdso/vdso32-setup.c
View file

@ -310,7 +310,7 @@ int __init sysenter_setup(void)
}
/* Setup a VMA at program startup for the vsyscall page */
int arch_setup_additional_pages(struct linux_binprm *bprm, int exstack)
int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
{
struct mm_struct *mm = current->mm;
unsigned long addr;

2
arch/x86/vdso/vma.c
View file

@ -98,7 +98,7 @@ static unsigned long vdso_addr(unsigned long start, unsigned len)
/* Setup a VMA at program startup for the vsyscall page.
Not called for compat tasks */
int arch_setup_additional_pages(struct linux_binprm *bprm, int exstack)
int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
{
struct mm_struct *mm = current->mm;
unsigned long addr;

10
drivers/char/Kconfig
View file

@ -622,6 +622,16 @@ config HVC_BEAT
help
Toshiba's Cell Reference Set Beat Console device driver
config HVC_IUCV
bool "z/VM IUCV Hypervisor console support (VM only)"
depends on S390
select HVC_DRIVER
select IUCV
default y
help
This driver provides a Hypervisor console (HVC) back-end to access
a Linux (console) terminal via a z/VM IUCV communication path.
config HVC_XEN
bool "Xen Hypervisor Console support"
depends on XEN

1
drivers/char/Makefile
View file

@ -50,6 +50,7 @@ obj-$(CONFIG_HVC_BEAT) += hvc_beat.o
obj-$(CONFIG_HVC_DRIVER) += hvc_console.o
obj-$(CONFIG_HVC_IRQ) += hvc_irq.o
obj-$(CONFIG_HVC_XEN) += hvc_xen.o
obj-$(CONFIG_HVC_IUCV) += hvc_iucv.o
obj-$(CONFIG_VIRTIO_CONSOLE) += virtio_console.o
obj-$(CONFIG_RAW_DRIVER) += raw.o
obj-$(CONFIG_SGI_SNSC) += snsc.o snsc_event.o

850
drivers/char/hvc_iucv.c Normal file
View file

@ -0,0 +1,850 @@
/*
* hvc_iucv.c - z/VM IUCV back-end for the Hypervisor Console (HVC)
*
* This back-end for HVC provides terminal access via
* z/VM IUCV communication paths.
*
* Copyright IBM Corp. 2008.
*
* Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
*/
#define KMSG_COMPONENT "hvc_iucv"
#include <linux/types.h>
#include <asm/ebcdic.h>
#include <linux/mempool.h>
#include <linux/module.h>
#include <linux/tty.h>
#include <net/iucv/iucv.h>
#include "hvc_console.h"
/* HVC backend for z/VM IUCV */
#define HVC_IUCV_MAGIC 0xc9e4c3e5
#define MAX_HVC_IUCV_LINES HVC_ALLOC_TTY_ADAPTERS
#define MEMPOOL_MIN_NR (PAGE_SIZE / sizeof(struct iucv_tty_buffer)/4)
/* IUCV TTY message */
#define MSG_VERSION 0x02 /* Message version */
#define MSG_TYPE_ERROR 0x01 /* Error message */
#define MSG_TYPE_TERMENV 0x02 /* Terminal environment variable */
#define MSG_TYPE_TERMIOS 0x04 /* Terminal IO struct update */
#define MSG_TYPE_WINSIZE 0x08 /* Terminal window size update */
#define MSG_TYPE_DATA 0x10 /* Terminal data */
#define MSG_SIZE(s) ((s) + offsetof(struct iucv_tty_msg, data))
struct iucv_tty_msg {
u8 version; /* Message version */
u8 type; /* Message type */
#define MSG_MAX_DATALEN (~(u16)0)
u16 datalen; /* Payload length */
u8 data[]; /* Payload buffer */
} __attribute__((packed));
enum iucv_state_t {
IUCV_DISCONN = 0,
IUCV_CONNECTED = 1,
IUCV_SEVERED = 2,
};
enum tty_state_t {
TTY_CLOSED = 0,
TTY_OPENED = 1,
};
struct hvc_iucv_private {
struct hvc_struct *hvc; /* HVC console struct reference */
u8 srv_name[8]; /* IUCV service name (ebcdic) */
enum iucv_state_t iucv_state; /* IUCV connection status */
enum tty_state_t tty_state; /* TTY status */
struct iucv_path *path; /* IUCV path pointer */
spinlock_t lock; /* hvc_iucv_private lock */
struct list_head tty_outqueue; /* outgoing IUCV messages */
struct list_head tty_inqueue; /* incoming IUCV messages */
};
struct iucv_tty_buffer {
struct list_head list; /* list pointer */
struct iucv_message msg; /* store an incoming IUCV message */
size_t offset; /* data buffer offset */
struct iucv_tty_msg *mbuf; /* buffer to store input/output data */
};
/* IUCV callback handler */
static int hvc_iucv_path_pending(struct iucv_path *, u8[8], u8[16]);
static void hvc_iucv_path_severed(struct iucv_path *, u8[16]);
static void hvc_iucv_msg_pending(struct iucv_path *, struct iucv_message *);
static void hvc_iucv_msg_complete(struct iucv_path *, struct iucv_message *);
/* Kernel module parameters */
static unsigned long hvc_iucv_devices;
/* Array of allocated hvc iucv tty lines... */
static struct hvc_iucv_private *hvc_iucv_table[MAX_HVC_IUCV_LINES];
/* Kmem cache and mempool for iucv_tty_buffer elements */
static struct kmem_cache *hvc_iucv_buffer_cache;
static mempool_t *hvc_iucv_mempool;
/* IUCV handler callback functions */
static struct iucv_handler hvc_iucv_handler = {
.path_pending = hvc_iucv_path_pending,
.path_severed = hvc_iucv_path_severed,
.message_complete = hvc_iucv_msg_complete,
.message_pending = hvc_iucv_msg_pending,
};
/**
* hvc_iucv_get_private() - Return a struct hvc_iucv_private instance.
* @num: The HVC virtual terminal number (vtermno)
*
* This function returns the struct hvc_iucv_private instance that corresponds
* to the HVC virtual terminal number specified as parameter @num.
*/
struct hvc_iucv_private *hvc_iucv_get_private(uint32_t num)
{
if ((num < HVC_IUCV_MAGIC) || (num - HVC_IUCV_MAGIC > hvc_iucv_devices))
return NULL;
return hvc_iucv_table[num - HVC_IUCV_MAGIC];
}
/**
* alloc_tty_buffer() - Returns a new struct iucv_tty_buffer element.
* @size: Size of the internal buffer used to store data.
* @flags: Memory allocation flags passed to mempool.
*
* This function allocates a new struct iucv_tty_buffer element and, optionally,
* allocates an internal data buffer with the specified size @size.
* Note: The total message size arises from the internal buffer size and the
* members of the iucv_tty_msg structure.
*
* The function returns NULL if memory allocation has failed.
*/
static struct iucv_tty_buffer *alloc_tty_buffer(size_t size, gfp_t flags)
{
struct iucv_tty_buffer *bufp;
bufp = mempool_alloc(hvc_iucv_mempool, flags);
if (!bufp)
return NULL;
memset(bufp, 0, sizeof(struct iucv_tty_buffer));
if (size > 0) {
bufp->msg.length = MSG_SIZE(size);
bufp->mbuf = kmalloc(bufp->msg.length, flags);
if (!bufp->mbuf) {
mempool_free(bufp, hvc_iucv_mempool);
return NULL;
}
bufp->mbuf->version = MSG_VERSION;
bufp->mbuf->type = MSG_TYPE_DATA;
bufp->mbuf->datalen = (u16) size;
}
return bufp;
}
/**
* destroy_tty_buffer() - destroy struct iucv_tty_buffer element.
* @bufp: Pointer to a struct iucv_tty_buffer element, SHALL NOT be NULL.
*
* The destroy_tty_buffer() function frees the internal data buffer and returns
* the struct iucv_tty_buffer element back to the mempool for freeing.
*/
static void destroy_tty_buffer(struct iucv_tty_buffer *bufp)
{
kfree(bufp->mbuf);
mempool_free(bufp, hvc_iucv_mempool);
}
/**
* destroy_tty_buffer_list() - call destroy_tty_buffer() for each list element.
* @list: List head pointer to a list containing struct iucv_tty_buffer
* elements.
*
* Calls destroy_tty_buffer() for each struct iucv_tty_buffer element in the
* list @list.
*/
static void destroy_tty_buffer_list(struct list_head *list)
{
struct iucv_tty_buffer *ent, *next;
list_for_each_entry_safe(ent, next, list, list) {
list_del(&ent->list);
destroy_tty_buffer(ent);
}
}
/**
* hvc_iucv_write() - Receive IUCV message write data to HVC console buffer.
* @priv: Pointer to hvc_iucv_private structure.
* @buf: HVC console buffer for writing received terminal data.
* @count: HVC console buffer size.
* @has_more_data: Pointer to an int variable.
*
* The function picks up pending messages from the input queue and receives
* the message data that is then written to the specified buffer @buf.
* If the buffer size @count is less than the data message size, then the
* message is kept on the input queue and @has_more_data is set to 1.
* If the message data has been entirely written, the message is removed from
* the input queue.
*
* The function returns the number of bytes written to the terminal, zero if
* there are no pending data messages available or if there is no established
* IUCV path.
* If the IUCV path has been severed, then -EPIPE is returned to cause a
* hang up (that is issued by the HVC console layer).
*/
static int hvc_iucv_write(struct hvc_iucv_private *priv,
char *buf, int count, int *has_more_data)
{
struct iucv_tty_buffer *rb;
int written;
int rc;
/* Immediately return if there is no IUCV connection */
if (priv->iucv_state == IUCV_DISCONN)
return 0;
/* If the IUCV path has been severed, return -EPIPE to inform the
* hvc console layer to hang up the tty device. */
if (priv->iucv_state == IUCV_SEVERED)
return -EPIPE;
/* check if there are pending messages */
if (list_empty(&priv->tty_inqueue))
return 0;
/* receive a iucv message and flip data to the tty (ldisc) */
rb = list_first_entry(&priv->tty_inqueue, struct iucv_tty_buffer, list);
written = 0;
if (!rb->mbuf) { /* message not yet received ... */
/* allocate mem to store msg data; if no memory is available
* then leave the buffer on the list and re-try later */
rb->mbuf = kmalloc(rb->msg.length, GFP_ATOMIC);
if (!rb->mbuf)
return -ENOMEM;
rc = __iucv_message_receive(priv->path, &rb->msg, 0,
rb->mbuf, rb->msg.length, NULL);
switch (rc) {
case 0: /* Successful */
break;
case 2: /* No message found */
case 9: /* Message purged */
break;
default:
written = -EIO;
}
/* remove buffer if an error has occured or received data
* is not correct */
if (rc || (rb->mbuf->version != MSG_VERSION) ||
(rb->msg.length != MSG_SIZE(rb->mbuf->datalen)))
goto out_remove_buffer;
}
switch (rb->mbuf->type) {
case MSG_TYPE_DATA:
written = min_t(int, rb->mbuf->datalen - rb->offset, count);
memcpy(buf, rb->mbuf->data + rb->offset, written);
if (written < (rb->mbuf->datalen - rb->offset)) {
rb->offset += written;
*has_more_data = 1;
goto out_written;
}
break;
case MSG_TYPE_WINSIZE:
if (rb->mbuf->datalen != sizeof(struct winsize))
break;
hvc_resize(priv->hvc, *((struct winsize *)rb->mbuf->data));
break;
case MSG_TYPE_ERROR: /* ignored ... */
case MSG_TYPE_TERMENV: /* ignored ... */
case MSG_TYPE_TERMIOS: /* ignored ... */
break;
}
out_remove_buffer:
list_del(&rb->list);
destroy_tty_buffer(rb);
*has_more_data = !list_empty(&priv->tty_inqueue);
out_written:
return written;
}
/**
* hvc_iucv_get_chars() - HVC get_chars operation.
* @vtermno: HVC virtual terminal number.
* @buf: Pointer to a buffer to store data
* @count: Size of buffer available for writing
*
* The hvc_console thread calls this method to read characters from
* the terminal backend. If an IUCV communication path has been established,
* pending IUCV messages are received and data is copied into buffer @buf
* up to @count bytes.
*
* Locking: The routine gets called under an irqsave() spinlock; and
* the routine locks the struct hvc_iucv_private->lock to call
* helper functions.
*/
static int hvc_iucv_get_chars(uint32_t vtermno, char *buf, int count)
{
struct hvc_iucv_private *priv = hvc_iucv_get_private(vtermno);
int written;
int has_more_data;
if (count <= 0)
return 0;
if (!priv)
return -ENODEV;
spin_lock(&priv->lock);
has_more_data = 0;
written = hvc_iucv_write(priv, buf, count, &has_more_data);
spin_unlock(&priv->lock);
/* if there are still messages on the queue... schedule another run */
if (has_more_data)
hvc_kick();
return written;
}
/**
* hvc_iucv_send() - Send an IUCV message containing terminal data.
* @priv: Pointer to struct hvc_iucv_private instance.
* @buf: Buffer containing data to send.
* @size: Size of buffer and amount of data to send.
*
* If an IUCV communication path is established, the function copies the buffer
* data to a newly allocated struct iucv_tty_buffer element, sends the data and
* puts the element to the outqueue.
*
* If there is no IUCV communication path established, the function returns 0.
* If an existing IUCV communicaton path has been severed, the function returns
* -EPIPE (can be passed to HVC layer to cause a tty hangup).
*/
static int hvc_iucv_send(struct hvc_iucv_private *priv, const char *buf,
int count)
{
struct iucv_tty_buffer *sb;
int rc;
u16 len;
if (priv->iucv_state == IUCV_SEVERED)
return -EPIPE;
if (priv->iucv_state == IUCV_DISCONN)
return 0;
len = min_t(u16, MSG_MAX_DATALEN, count);
/* allocate internal buffer to store msg data and also compute total
* message length */
sb = alloc_tty_buffer(len, GFP_ATOMIC);
if (!sb)
return -ENOMEM;
sb->mbuf->datalen = len;
memcpy(sb->mbuf->data, buf, len);
list_add_tail(&sb->list, &priv->tty_outqueue);
rc = __iucv_message_send(priv->path, &sb->msg, 0, 0,
(void *) sb->mbuf, sb->msg.length);
if (rc) {
list_del(&sb->list);
destroy_tty_buffer(sb);
len = 0;
}
return len;
}
/**
* hvc_iucv_put_chars() - HVC put_chars operation.
* @vtermno: HVC virtual terminal number.
* @buf: Pointer to an buffer to read data from
* @count: Size of buffer available for reading
*
* The hvc_console thread calls this method to write characters from
* to the terminal backend.
* The function calls hvc_iucv_send() under the lock of the
* struct hvc_iucv_private instance that corresponds to the tty @vtermno.
*
* Locking: The method gets called under an irqsave() spinlock; and
* locks struct hvc_iucv_private->lock.
*/
static int hvc_iucv_put_chars(uint32_t vtermno, const char *buf, int count)
{
struct hvc_iucv_private *priv = hvc_iucv_get_private(vtermno);
int sent;
if (count <= 0)
return 0;
if (!priv)
return -ENODEV;
spin_lock(&priv->lock);
sent = hvc_iucv_send(priv, buf, count);
spin_unlock(&priv->lock);
return sent;
}
/**
* hvc_iucv_notifier_add() - HVC notifier for opening a TTY for the first time.
* @hp: Pointer to the HVC device (struct hvc_struct)
* @id: Additional data (originally passed to hvc_alloc): the index of an struct
* hvc_iucv_private instance.
*
* The function sets the tty state to TTY_OPEN for the struct hvc_iucv_private
* instance that is derived from @id. Always returns 0.
*
* Locking: struct hvc_iucv_private->lock, spin_lock_bh
*/
static int hvc_iucv_notifier_add(struct hvc_struct *hp, int id)
{
struct hvc_iucv_private *priv;
priv = hvc_iucv_get_private(id);
if (!priv)
return 0;
spin_lock_bh(&priv->lock);
priv->tty_state = TTY_OPENED;
spin_unlock_bh(&priv->lock);
return 0;
}
/**
* hvc_iucv_cleanup() - Clean up function if the tty portion is finally closed.
* @priv: Pointer to the struct hvc_iucv_private instance.
*
* The functions severs the established IUCV communication path (if any), and
* destroy struct iucv_tty_buffer elements from the in- and outqueue. Finally,
* the functions resets the states to TTY_CLOSED and IUCV_DISCONN.
*/
static void hvc_iucv_cleanup(struct hvc_iucv_private *priv)
{
destroy_tty_buffer_list(&priv->tty_outqueue);
destroy_tty_buffer_list(&priv->tty_inqueue);
priv->tty_state = TTY_CLOSED;
priv->iucv_state = IUCV_DISCONN;
}
/**
* hvc_iucv_notifier_hangup() - HVC notifier for tty hangups.
* @hp: Pointer to the HVC device (struct hvc_struct)
* @id: Additional data (originally passed to hvc_alloc): the index of an struct
* hvc_iucv_private instance.
*
* This routine notifies the HVC backend that a tty hangup (carrier loss,
* virtual or otherwise) has occured.
*
* The HVC backend for z/VM IUCV ignores virtual hangups (vhangup()), to keep
* an existing IUCV communication path established.
* (Background: vhangup() is called from user space (by getty or login) to
* disable writing to the tty by other applications).
*
* If the tty has been opened (e.g. getty) and an established IUCV path has been
* severed (we caused the tty hangup in that case), then the functions invokes
* hvc_iucv_cleanup() to clean up.
*
* Locking: struct hvc_iucv_private->lock
*/
static void hvc_iucv_notifier_hangup(struct hvc_struct *hp, int id)
{
struct hvc_iucv_private *priv;
priv = hvc_iucv_get_private(id);
if (!priv)
return;
spin_lock_bh(&priv->lock);
/* NOTE: If the hangup was scheduled by ourself (from the iucv
* path_servered callback [IUCV_SEVERED]), then we have to
* finally clean up the tty backend structure and set state to
* TTY_CLOSED.
*
* If the tty was hung up otherwise (e.g. vhangup()), then we
* ignore this hangup and keep an established IUCV path open...
* (...the reason is that we are not able to connect back to the
* client if we disconnect on hang up) */
priv->tty_state = TTY_CLOSED;
if (priv->iucv_state == IUCV_SEVERED)
hvc_iucv_cleanup(priv);
spin_unlock_bh(&priv->lock);
}
/**
* hvc_iucv_notifier_del() - HVC notifier for closing a TTY for the last time.
* @hp: Pointer to the HVC device (struct hvc_struct)
* @id: Additional data (originally passed to hvc_alloc):
* the index of an struct hvc_iucv_private instance.
*
* This routine notifies the HVC backend that the last tty device file
* descriptor has been closed.
* The function calls hvc_iucv_cleanup() to clean up the struct hvc_iucv_private
* instance.
*
* Locking: struct hvc_iucv_private->lock
*/
static void hvc_iucv_notifier_del(struct hvc_struct *hp, int id)
{
struct hvc_iucv_private *priv;
struct iucv_path *path;
priv = hvc_iucv_get_private(id);
if (!priv)
return;
spin_lock_bh(&priv->lock);
path = priv->path; /* save reference to IUCV path */
priv->path = NULL;
hvc_iucv_cleanup(priv);
spin_unlock_bh(&priv->lock);
/* sever IUCV path outside of priv->lock due to lock ordering of:
* priv->lock <--> iucv_table_lock */
if (path) {
iucv_path_sever(path, NULL);
iucv_path_free(path);
}
}
/**
* hvc_iucv_path_pending() - IUCV handler to process a connection request.
* @path: Pending path (struct iucv_path)
* @ipvmid: Originator z/VM system identifier
* @ipuser: User specified data for this path
* (AF_IUCV: port/service name and originator port)
*
* The function uses the @ipuser data to check to determine if the pending
* path belongs to a terminal managed by this HVC backend.
* If the check is successful, then an additional check is done to ensure
* that a terminal cannot be accessed multiple times (only one connection
* to a terminal is allowed). In that particular case, the pending path is
* severed. If it is the first connection, the pending path is accepted and
* associated to the struct hvc_iucv_private. The iucv state is updated to
* reflect that a communication path has been established.
*
* Returns 0 if the path belongs to a terminal managed by the this HVC backend;
* otherwise returns -ENODEV in order to dispatch this path to other handlers.
*
* Locking: struct hvc_iucv_private->lock
*/
static int hvc_iucv_path_pending(struct iucv_path *path,
u8 ipvmid[8], u8 ipuser[16])
{
struct hvc_iucv_private *priv;
u8 nuser_data[16];
int i, rc;
priv = NULL;
for (i = 0; i < hvc_iucv_devices; i++)
if (hvc_iucv_table[i] &&
(0 == memcmp(hvc_iucv_table[i]->srv_name, ipuser, 8))) {
priv = hvc_iucv_table[i];
break;
}
if (!priv)
return -ENODEV;
spin_lock(&priv->lock);
/* If the terminal is already connected or being severed, then sever
* this path to enforce that there is only ONE established communication
* path per terminal. */
if (priv->iucv_state != IUCV_DISCONN) {
iucv_path_sever(path, ipuser);
iucv_path_free(path);
goto out_path_handled;
}
/* accept path */
memcpy(nuser_data, ipuser + 8, 8); /* remote service (for af_iucv) */
memcpy(nuser_data + 8, ipuser, 8); /* local service (for af_iucv) */
path->msglim = 0xffff; /* IUCV MSGLIMIT */
path->flags &= ~IUCV_IPRMDATA; /* TODO: use IUCV_IPRMDATA */
rc = iucv_path_accept(path, &hvc_iucv_handler, nuser_data, priv);
if (rc) {
iucv_path_sever(path, ipuser);
iucv_path_free(path);
goto out_path_handled;
}
priv->path = path;
priv->iucv_state = IUCV_CONNECTED;
out_path_handled:
spin_unlock(&priv->lock);
return 0;
}
/**
* hvc_iucv_path_severed() - IUCV handler to process a path sever.
* @path: Pending path (struct iucv_path)
* @ipuser: User specified data for this path
* (AF_IUCV: port/service name and originator port)
*
* The function also severs the path (as required by the IUCV protocol) and
* sets the iucv state to IUCV_SEVERED for the associated struct
* hvc_iucv_private instance. Later, the IUCV_SEVERED state triggers a tty
* hangup (hvc_iucv_get_chars() / hvc_iucv_write()).
*
* If tty portion of the HVC is closed then clean up the outqueue in addition.
*
* Locking: struct hvc_iucv_private->lock
*/
static void hvc_iucv_path_severed(struct iucv_path *path, u8 ipuser[16])
{
struct hvc_iucv_private *priv = path->private;
spin_lock(&priv->lock);
priv->iucv_state = IUCV_SEVERED;
/* NOTE: If the tty has not yet been opened by a getty program
* (e.g. to see console messages), then cleanup the
* hvc_iucv_private structure to allow re-connects.
*
* If the tty has been opened, the get_chars() callback returns
* -EPIPE to signal the hvc console layer to hang up the tty. */
priv->path = NULL;
if (priv->tty_state == TTY_CLOSED)
hvc_iucv_cleanup(priv);
spin_unlock(&priv->lock);
/* finally sever path (outside of priv->lock due to lock ordering) */
iucv_path_sever(path, ipuser);
iucv_path_free(path);
}
/**
* hvc_iucv_msg_pending() - IUCV handler to process an incoming IUCV message.
* @path: Pending path (struct iucv_path)
* @msg: Pointer to the IUCV message
*
* The function stores an incoming message on the input queue for later
* processing (by hvc_iucv_get_chars() / hvc_iucv_write()).
* However, if the tty has not yet been opened, the message is rejected.
*
* Locking: struct hvc_iucv_private->lock
*/
static void hvc_iucv_msg_pending(struct iucv_path *path,
struct iucv_message *msg)
{
struct hvc_iucv_private *priv = path->private;
struct iucv_tty_buffer *rb;
spin_lock(&priv->lock);
/* reject messages if tty has not yet been opened */
if (priv->tty_state == TTY_CLOSED) {
iucv_message_reject(path, msg);
goto unlock_return;
}
/* allocate buffer an empty buffer element */
rb = alloc_tty_buffer(0, GFP_ATOMIC);
if (!rb) {
iucv_message_reject(path, msg);
goto unlock_return; /* -ENOMEM */
}
rb->msg = *msg;
list_add_tail(&rb->list, &priv->tty_inqueue);
hvc_kick(); /* wakup hvc console thread */
unlock_return:
spin_unlock(&priv->lock);
}
/**
* hvc_iucv_msg_complete() - IUCV handler to process message completion
* @path: Pending path (struct iucv_path)
* @msg: Pointer to the IUCV message
*
* The function is called upon completion of message delivery and the
* message is removed from the outqueue. Additional delivery information
* can be found in msg->audit: rejected messages (0x040000 (IPADRJCT)) and
* purged messages (0x010000 (IPADPGNR)).
*
* Locking: struct hvc_iucv_private->lock
*/
static void hvc_iucv_msg_complete(struct iucv_path *path,
struct iucv_message *msg)
{
struct hvc_iucv_private *priv = path->private;
struct iucv_tty_buffer *ent, *next;
LIST_HEAD(list_remove);
spin_lock(&priv->lock);
list_for_each_entry_safe(ent, next, &priv->tty_outqueue, list)
if (ent->msg.id == msg->id) {
list_move(&ent->list, &list_remove);
break;
}
spin_unlock(&priv->lock);
destroy_tty_buffer_list(&list_remove);
}
/* HVC operations */
static struct hv_ops hvc_iucv_ops = {
.get_chars = hvc_iucv_get_chars,
.put_chars = hvc_iucv_put_chars,
.notifier_add = hvc_iucv_notifier_add,
.notifier_del = hvc_iucv_notifier_del,
.notifier_hangup = hvc_iucv_notifier_hangup,
};
/**
* hvc_iucv_alloc() - Allocates a new struct hvc_iucv_private instance
* @id: hvc_iucv_table index
*
* This function allocates a new hvc_iucv_private struct and put the
* instance into hvc_iucv_table at index @id.
* Returns 0 on success; otherwise non-zero.
*/
static int __init hvc_iucv_alloc(int id)
{
struct hvc_iucv_private *priv;
char name[9];
int rc;
priv = kzalloc(sizeof(struct hvc_iucv_private), GFP_KERNEL);
if (!priv)
return -ENOMEM;
spin_lock_init(&priv->lock);
INIT_LIST_HEAD(&priv->tty_outqueue);
INIT_LIST_HEAD(&priv->tty_inqueue);
/* Finally allocate hvc */
priv->hvc = hvc_alloc(HVC_IUCV_MAGIC + id,
HVC_IUCV_MAGIC + id, &hvc_iucv_ops, PAGE_SIZE);
if (IS_ERR(priv->hvc)) {
rc = PTR_ERR(priv->hvc);
kfree(priv);
return rc;
}
/* setup iucv related information */
snprintf(name, 9, "ihvc%-4d", id);
memcpy(priv->srv_name, name, 8);
ASCEBC(priv->srv_name, 8);
hvc_iucv_table[id] = priv;
return 0;
}
/**
* hvc_iucv_init() - Initialization of HVC backend for z/VM IUCV
*/
static int __init hvc_iucv_init(void)
{
int rc, i;
if (!MACHINE_IS_VM) {
pr_warning("The z/VM IUCV Hypervisor console cannot be "
"used without z/VM.\n");
return -ENODEV;
}
if (!hvc_iucv_devices)
return -ENODEV;
if (hvc_iucv_devices > MAX_HVC_IUCV_LINES)
return -EINVAL;
hvc_iucv_buffer_cache = kmem_cache_create(KMSG_COMPONENT,
sizeof(struct iucv_tty_buffer),
0, 0, NULL);
if (!hvc_iucv_buffer_cache) {
pr_err("Not enough memory for driver initialization "
"(rs=%d).\n", 1);
return -ENOMEM;
}
hvc_iucv_mempool = mempool_create_slab_pool(MEMPOOL_MIN_NR,
hvc_iucv_buffer_cache);
if (!hvc_iucv_mempool) {
pr_err("Not enough memory for driver initialization "
"(rs=%d).\n", 2);
kmem_cache_destroy(hvc_iucv_buffer_cache);
return -ENOMEM;
}
/* allocate hvc_iucv_private structs */
for (i = 0; i < hvc_iucv_devices; i++) {
rc = hvc_iucv_alloc(i);
if (rc) {
pr_err("Could not create new z/VM IUCV HVC backend "
"rc=%d.\n", rc);
goto out_error_hvc;
}
}
/* register IUCV callback handler */
rc = iucv_register(&hvc_iucv_handler, 0);
if (rc) {
pr_err("Could not register iucv handler (rc=%d).\n", rc);
goto out_error_iucv;
}
return 0;
out_error_iucv:
iucv_unregister(&hvc_iucv_handler, 0);
out_error_hvc:
for (i = 0; i < hvc_iucv_devices; i++)
if (hvc_iucv_table[i]) {
if (hvc_iucv_table[i]->hvc)
hvc_remove(hvc_iucv_table[i]->hvc);
kfree(hvc_iucv_table[i]);
}
mempool_destroy(hvc_iucv_mempool);
kmem_cache_destroy(hvc_iucv_buffer_cache);
return rc;
}
/**
* hvc_iucv_console_init() - Early console initialization
*/
static int __init hvc_iucv_console_init(void)
{
if (!MACHINE_IS_VM || !hvc_iucv_devices)
return -ENODEV;
return hvc_instantiate(HVC_IUCV_MAGIC, 0, &hvc_iucv_ops);
}
/**
* hvc_iucv_config() - Parsing of hvc_iucv= kernel command line parameter
* @val: Parameter value (numeric)
*/
static int __init hvc_iucv_config(char *val)
{
return strict_strtoul(val, 10, &hvc_iucv_devices);
}
module_init(hvc_iucv_init);
console_initcall(hvc_iucv_console_init);
__setup("hvc_iucv=", hvc_iucv_config);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("HVC back-end for z/VM IUCV.");
MODULE_AUTHOR("Hendrik Brueckner <brueckner@linux.vnet.ibm.com>");

4
drivers/s390/block/dasd.c
View file

@ -1898,15 +1898,19 @@ restart_cb:
wait_event(dasd_flush_wq, (cqr->status < DASD_CQR_QUEUED));
/* Process finished ERP request. */
if (cqr->refers) {
spin_lock_bh(&block->queue_lock);
__dasd_block_process_erp(block, cqr);
spin_unlock_bh(&block->queue_lock);
/* restart list_for_xx loop since dasd_process_erp
* might remove multiple elements */
goto restart_cb;
}
/* call the callback function */
spin_lock_irq(&block->request_queue_lock);
cqr->endclk = get_clock();
list_del_init(&cqr->blocklist);
__dasd_cleanup_cqr(cqr);
spin_unlock_irq(&block->request_queue_lock);
}
return rc;
}

19
drivers/s390/block/dasd_devmap.c
View file

@ -23,6 +23,7 @@
/* This is ugly... */
#define PRINTK_HEADER "dasd_devmap:"
#define DASD_BUS_ID_SIZE 20
#include "dasd_int.h"
@ -41,7 +42,7 @@ EXPORT_SYMBOL_GPL(dasd_page_cache);
*/
struct dasd_devmap {
struct list_head list;
char bus_id[BUS_ID_SIZE];
char bus_id[DASD_BUS_ID_SIZE];
unsigned int devindex;
unsigned short features;
struct dasd_device *device;
@ -94,7 +95,7 @@ dasd_hash_busid(const char *bus_id)
int hash, i;
hash = 0;
for (i = 0; (i < BUS_ID_SIZE) && *bus_id; i++, bus_id++)
for (i = 0; (i < DASD_BUS_ID_SIZE) && *bus_id; i++, bus_id++)
hash += *bus_id;
return hash & 0xff;
}
@ -301,7 +302,7 @@ dasd_parse_range( char *parsestring ) {
int from, from_id0, from_id1;
int to, to_id0, to_id1;
int features, rc;
char bus_id[BUS_ID_SIZE+1], *str;
char bus_id[DASD_BUS_ID_SIZE+1], *str;
str = parsestring;
rc = dasd_busid(&str, &from_id0, &from_id1, &from);
@ -407,14 +408,14 @@ dasd_add_busid(const char *bus_id, int features)
devmap = NULL;
hash = dasd_hash_busid(bus_id);
list_for_each_entry(tmp, &dasd_hashlists[hash], list)
if (strncmp(tmp->bus_id, bus_id, BUS_ID_SIZE) == 0) {
if (strncmp(tmp->bus_id, bus_id, DASD_BUS_ID_SIZE) == 0) {
devmap = tmp;
break;
}
if (!devmap) {
/* This bus_id is new. */
new->devindex = dasd_max_devindex++;
strncpy(new->bus_id, bus_id, BUS_ID_SIZE);
strncpy(new->bus_id, bus_id, DASD_BUS_ID_SIZE);
new->features = features;
new->device = NULL;
list_add(&new->list, &dasd_hashlists[hash]);
@ -439,7 +440,7 @@ dasd_find_busid(const char *bus_id)
devmap = ERR_PTR(-ENODEV);
hash = dasd_hash_busid(bus_id);
list_for_each_entry(tmp, &dasd_hashlists[hash], list) {
if (strncmp(tmp->bus_id, bus_id, BUS_ID_SIZE) == 0) {
if (strncmp(tmp->bus_id, bus_id, DASD_BUS_ID_SIZE) == 0) {
devmap = tmp;
break;
}
@ -561,7 +562,7 @@ dasd_create_device(struct ccw_device *cdev)
}
spin_lock_irqsave(get_ccwdev_lock(cdev), flags);
cdev->dev.driver_data = device;
dev_set_drvdata(&cdev->dev, device);
spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
return device;
@ -597,7 +598,7 @@ dasd_delete_device(struct dasd_device *device)
/* Disconnect dasd_device structure from ccw_device structure. */
spin_lock_irqsave(get_ccwdev_lock(device->cdev), flags);
device->cdev->dev.driver_data = NULL;
dev_set_drvdata(&device->cdev->dev, NULL);
spin_unlock_irqrestore(get_ccwdev_lock(device->cdev), flags);
/*
@ -638,7 +639,7 @@ dasd_put_device_wake(struct dasd_device *device)
struct dasd_device *
dasd_device_from_cdev_locked(struct ccw_device *cdev)
{
struct dasd_device *device = cdev->dev.driver_data;
struct dasd_device *device = dev_get_drvdata(&cdev->dev);
if (!device)
return ERR_PTR(-ENODEV);

2
drivers/s390/block/dasd_eckd.c
View file

@ -1496,7 +1496,7 @@ static void dasd_eckd_handle_unsolicited_interrupt(struct dasd_device *device,
/* service information message SIM */
if (irb->esw.esw0.erw.cons && (irb->ecw[27] & DASD_SENSE_BIT_0) &&
if (irb->esw.esw0.erw.cons && !(irb->ecw[27] & DASD_SENSE_BIT_0) &&
((irb->ecw[6] & DASD_SIM_SENSE) == DASD_SIM_SENSE)) {
dasd_3990_erp_handle_sim(device, irb->ecw);
dasd_schedule_device_bh(device);

28
drivers/s390/block/dasd_proc.c
View file

@ -180,12 +180,12 @@ dasd_calc_metrics(char *page, char **start, off_t off,
#ifdef CONFIG_DASD_PROFILE
static char *
dasd_statistics_array(char *str, unsigned int *array, int shift)
dasd_statistics_array(char *str, unsigned int *array, int factor)
{
int i;
for (i = 0; i < 32; i++) {
str += sprintf(str, "%7d ", array[i] >> shift);
str += sprintf(str, "%7d ", array[i] / factor);
if (i == 15)
str += sprintf(str, "\n");
}
@ -202,7 +202,7 @@ dasd_statistics_read(char *page, char **start, off_t off,
#ifdef CONFIG_DASD_PROFILE
struct dasd_profile_info_t *prof;
char *str;
int shift;
int factor;
/* check for active profiling */
if (dasd_profile_level == DASD_PROFILE_OFF) {
@ -214,12 +214,14 @@ dasd_statistics_read(char *page, char **start, off_t off,
prof = &dasd_global_profile;
/* prevent couter 'overflow' on output */
for (shift = 0; (prof->dasd_io_reqs >> shift) > 9999999; shift++);
for (factor = 1; (prof->dasd_io_reqs / factor) > 9999999;
factor *= 10);
str = page;
str += sprintf(str, "%d dasd I/O requests\n", prof->dasd_io_reqs);
str += sprintf(str, "with %d sectors(512B each)\n",
str += sprintf(str, "with %u sectors(512B each)\n",
prof->dasd_io_sects);
str += sprintf(str, "Scale Factor is %d\n", factor);
str += sprintf(str,
" __<4 ___8 __16 __32 __64 _128 "
" _256 _512 __1k __2k __4k __8k "
@ -230,22 +232,22 @@ dasd_statistics_read(char *page, char **start, off_t off,
" __1G __2G __4G " " _>4G\n");
str += sprintf(str, "Histogram of sizes (512B secs)\n");
str = dasd_statistics_array(str, prof->dasd_io_secs, shift);
str = dasd_statistics_array(str, prof->dasd_io_secs, factor);
str += sprintf(str, "Histogram of I/O times (microseconds)\n");
str = dasd_statistics_array(str, prof->dasd_io_times, shift);
str = dasd_statistics_array(str, prof->dasd_io_times, factor);
str += sprintf(str, "Histogram of I/O times per sector\n");
str = dasd_statistics_array(str, prof->dasd_io_timps, shift);
str = dasd_statistics_array(str, prof->dasd_io_timps, factor);
str += sprintf(str, "Histogram of I/O time till ssch\n");
str = dasd_statistics_array(str, prof->dasd_io_time1, shift);
str = dasd_statistics_array(str, prof->dasd_io_time1, factor);
str += sprintf(str, "Histogram of I/O time between ssch and irq\n");
str = dasd_statistics_array(str, prof->dasd_io_time2, shift);
str = dasd_statistics_array(str, prof->dasd_io_time2, factor);
str += sprintf(str, "Histogram of I/O time between ssch "
"and irq per sector\n");
str = dasd_statistics_array(str, prof->dasd_io_time2ps, shift);
str = dasd_statistics_array(str, prof->dasd_io_time2ps, factor);
str += sprintf(str, "Histogram of I/O time between irq and end\n");
str = dasd_statistics_array(str, prof->dasd_io_time3, shift);
str = dasd_statistics_array(str, prof->dasd_io_time3, factor);
str += sprintf(str, "# of req in chanq at enqueuing (1..32) \n");
str = dasd_statistics_array(str, prof->dasd_io_nr_req, shift);
str = dasd_statistics_array(str, prof->dasd_io_nr_req, factor);
len = str - page;
#else
len = sprintf(page, "Statistics are not activated in this kernel\n");

77
drivers/s390/block/dcssblk.c
View file

@ -4,6 +4,9 @@
* Authors: Carsten Otte, Stefan Weinhuber, Gerald Schaefer
*/
#define KMSG_COMPONENT "dcssblk"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/ctype.h>
@ -17,19 +20,10 @@
#include <linux/interrupt.h>
#include <asm/s390_rdev.h>
//#define DCSSBLK_DEBUG /* Debug messages on/off */
#define DCSSBLK_NAME "dcssblk"
#define DCSSBLK_MINORS_PER_DISK 1
#define DCSSBLK_PARM_LEN 400
#ifdef DCSSBLK_DEBUG
#define PRINT_DEBUG(x...) printk(KERN_DEBUG DCSSBLK_NAME " debug: " x)
#else
#define PRINT_DEBUG(x...) do {} while (0)
#endif
#define PRINT_INFO(x...) printk(KERN_INFO DCSSBLK_NAME " info: " x)
#define PRINT_WARN(x...) printk(KERN_WARNING DCSSBLK_NAME " warning: " x)
#define PRINT_ERR(x...) printk(KERN_ERR DCSSBLK_NAME " error: " x)
#define DCSS_BUS_ID_SIZE 20
static int dcssblk_open(struct block_device *bdev, fmode_t mode);
static int dcssblk_release(struct gendisk *disk, fmode_t mode);
@ -50,7 +44,7 @@ static struct block_device_operations dcssblk_devops = {
struct dcssblk_dev_info {
struct list_head lh;
struct device dev;
char segment_name[BUS_ID_SIZE];
char segment_name[DCSS_BUS_ID_SIZE];
atomic_t use_count;
struct gendisk *gd;
unsigned long start;
@ -65,7 +59,7 @@ struct dcssblk_dev_info {
struct segment_info {
struct list_head lh;
char segment_name[BUS_ID_SIZE];
char segment_name[DCSS_BUS_ID_SIZE];
unsigned long start;
unsigned long end;
int segment_type;
@ -261,10 +255,9 @@ dcssblk_is_continuous(struct dcssblk_dev_info *dev_info)
/* check continuity */
for (i = 0; i < dev_info->num_of_segments - 1; i++) {
if ((sort_list[i].end + 1) != sort_list[i+1].start) {
PRINT_ERR("Segment %s is not contiguous with "
"segment %s\n",
sort_list[i].segment_name,
sort_list[i+1].segment_name);
pr_err("Adjacent DCSSs %s and %s are not "
"contiguous\n", sort_list[i].segment_name,
sort_list[i+1].segment_name);
rc = -EINVAL;
goto out;
}
@ -275,10 +268,10 @@ dcssblk_is_continuous(struct dcssblk_dev_info *dev_info)
!(sort_list[i+1].segment_type &
SEGMENT_EXCLUSIVE) ||
(sort_list[i+1].segment_type == SEG_TYPE_ER)) {
PRINT_ERR("Segment %s has different type from "
"segment %s\n",
sort_list[i].segment_name,
sort_list[i+1].segment_name);
pr_err("DCSS %s and DCSS %s have "
"incompatible types\n",
sort_list[i].segment_name,
sort_list[i+1].segment_name);
rc = -EINVAL;
goto out;
}
@ -380,8 +373,9 @@ dcssblk_shared_store(struct device *dev, struct device_attribute *attr, const ch
} else if (inbuf[0] == '0') {
/* reload segments in exclusive mode */
if (dev_info->segment_type == SEG_TYPE_SC) {
PRINT_ERR("Segment type SC (%s) cannot be loaded in "
"non-shared mode\n", dev_info->segment_name);
pr_err("DCSS %s is of type SC and cannot be "
"loaded as exclusive-writable\n",
dev_info->segment_name);
rc = -EINVAL;
goto out;
}
@ -404,9 +398,8 @@ dcssblk_shared_store(struct device *dev, struct device_attribute *attr, const ch
goto out;
removeseg:
PRINT_ERR("Could not reload segment(s) of the device %s, removing "
"segment(s) now!\n",
dev_info->segment_name);
pr_err("DCSS device %s is removed after a failed access mode "
"change\n", dev_info->segment_name);
temp = entry;
list_for_each_entry(entry, &dev_info->seg_list, lh) {
if (entry != temp)
@ -454,17 +447,17 @@ dcssblk_save_store(struct device *dev, struct device_attribute *attr, const char
if (inbuf[0] == '1') {
if (atomic_read(&dev_info->use_count) == 0) {
// device is idle => we save immediately
PRINT_INFO("Saving segment(s) of the device %s\n",
dev_info->segment_name);
pr_info("All DCSSs that map to device %s are "
"saved\n", dev_info->segment_name);
list_for_each_entry(entry, &dev_info->seg_list, lh) {
segment_save(entry->segment_name);
}
} else {
// device is busy => we save it when it becomes
// idle in dcssblk_release
PRINT_INFO("Device %s is currently busy, segment(s) "
"will be saved when it becomes idle...\n",
dev_info->segment_name);
pr_info("Device %s is in use, its DCSSs will be "
"saved when it becomes idle\n",
dev_info->segment_name);
dev_info->save_pending = 1;
}
} else if (inbuf[0] == '0') {
@ -472,9 +465,9 @@ dcssblk_save_store(struct device *dev, struct device_attribute *attr, const char
// device is busy & the user wants to undo his save
// request
dev_info->save_pending = 0;
PRINT_INFO("Pending save for segment(s) of the device "
"%s deactivated\n",
dev_info->segment_name);
pr_info("A pending save request for device %s "
"has been canceled\n",
dev_info->segment_name);
}
} else {
up_write(&dcssblk_devices_sem);
@ -614,9 +607,8 @@ dcssblk_add_store(struct device *dev, struct device_attribute *attr, const char
seg_byte_size = (dev_info->end - dev_info->start + 1);
set_capacity(dev_info->gd, seg_byte_size >> 9); // size in sectors
PRINT_INFO("Loaded segment(s) %s, size = %lu Byte, "
"capacity = %lu (512 Byte) sectors\n", local_buf,
seg_byte_size, seg_byte_size >> 9);
pr_info("Loaded %s with total size %lu bytes and capacity %lu "
"sectors\n", local_buf, seg_byte_size, seg_byte_size >> 9);
dev_info->save_pending = 0;
dev_info->is_shared = 1;
@ -744,13 +736,15 @@ dcssblk_remove_store(struct device *dev, struct device_attribute *attr, const ch
dev_info = dcssblk_get_device_by_name(local_buf);
if (dev_info == NULL) {
up_write(&dcssblk_devices_sem);
PRINT_WARN("Device %s is not loaded!\n", local_buf);
pr_warning("Device %s cannot be removed because it is not a "
"known device\n", local_buf);
rc = -ENODEV;
goto out_buf;
}
if (atomic_read(&dev_info->use_count) != 0) {
up_write(&dcssblk_devices_sem);
PRINT_WARN("Device %s is in use!\n", local_buf);
pr_warning("Device %s cannot be removed while it is in "
"use\n", local_buf);
rc = -EBUSY;
goto out_buf;
}
@ -807,8 +801,8 @@ dcssblk_release(struct gendisk *disk, fmode_t mode)
down_write(&dcssblk_devices_sem);
if (atomic_dec_and_test(&dev_info->use_count)
&& (dev_info->save_pending)) {
PRINT_INFO("Device %s became idle and is being saved now\n",
dev_info->segment_name);
pr_info("Device %s has become idle and is being saved "
"now\n", dev_info->segment_name);
list_for_each_entry(entry, &dev_info->seg_list, lh) {
segment_save(entry->segment_name);
}
@ -851,7 +845,8 @@ dcssblk_make_request(struct request_queue *q, struct bio *bio)
case SEG_TYPE_SC:
/* cannot write to these segments */
if (bio_data_dir(bio) == WRITE) {
PRINT_WARN("rejecting write to ro device %s\n",
pr_warning("Writing to %s failed because it "
"is a read-only device\n",
dev_name(&dev_info->dev));
goto fail;
}

41
drivers/s390/block/xpram.c
View file

@ -25,6 +25,9 @@
* generic hard disk support to replace ad-hoc partitioning
*/
#define KMSG_COMPONENT "xpram"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/ctype.h> /* isdigit, isxdigit */
@ -42,12 +45,6 @@
#define XPRAM_DEVS 1 /* one partition */
#define XPRAM_MAX_DEVS 32 /* maximal number of devices (partitions) */
#define PRINT_DEBUG(x...) printk(KERN_DEBUG XPRAM_NAME " debug:" x)
#define PRINT_INFO(x...) printk(KERN_INFO XPRAM_NAME " info:" x)
#define PRINT_WARN(x...) printk(KERN_WARNING XPRAM_NAME " warning:" x)
#define PRINT_ERR(x...) printk(KERN_ERR XPRAM_NAME " error:" x)
typedef struct {
unsigned int size; /* size of xpram segment in pages */
unsigned int offset; /* start page of xpram segment */
@ -264,7 +261,7 @@ static int __init xpram_setup_sizes(unsigned long pages)
/* Check number of devices. */
if (devs <= 0 || devs > XPRAM_MAX_DEVS) {
PRINT_ERR("invalid number %d of devices\n",devs);
pr_err("%d is not a valid number of XPRAM devices\n",devs);
return -EINVAL;
}
xpram_devs = devs;
@ -295,22 +292,22 @@ static int __init xpram_setup_sizes(unsigned long pages)
mem_auto_no++;
}
PRINT_INFO(" number of devices (partitions): %d \n", xpram_devs);
pr_info(" number of devices (partitions): %d \n", xpram_devs);
for (i = 0; i < xpram_devs; i++) {
if (xpram_sizes[i])
PRINT_INFO(" size of partition %d: %u kB\n",
i, xpram_sizes[i]);
pr_info(" size of partition %d: %u kB\n",
i, xpram_sizes[i]);
else
PRINT_INFO(" size of partition %d to be set "
"automatically\n",i);
pr_info(" size of partition %d to be set "
"automatically\n",i);
}
PRINT_DEBUG(" memory needed (for sized partitions): %lu kB\n",
mem_needed);
PRINT_DEBUG(" partitions to be sized automatically: %d\n",
mem_auto_no);
pr_info(" memory needed (for sized partitions): %lu kB\n",
mem_needed);
pr_info(" partitions to be sized automatically: %d\n",
mem_auto_no);
if (mem_needed > pages * 4) {
PRINT_ERR("Not enough expanded memory available\n");
pr_err("Not enough expanded memory available\n");
return -EINVAL;
}
@ -322,8 +319,8 @@ static int __init xpram_setup_sizes(unsigned long pages)
*/
if (mem_auto_no) {
mem_auto = ((pages - mem_needed / 4) / mem_auto_no) * 4;
PRINT_INFO(" automatically determined "
"partition size: %lu kB\n", mem_auto);
pr_info(" automatically determined "
"partition size: %lu kB\n", mem_auto);
for (i = 0; i < xpram_devs; i++)
if (xpram_sizes[i] == 0)
xpram_sizes[i] = mem_auto;
@ -405,12 +402,12 @@ static int __init xpram_init(void)
/* Find out size of expanded memory. */
if (xpram_present() != 0) {
PRINT_WARN("No expanded memory available\n");
pr_err("No expanded memory available\n");
return -ENODEV;
}
xpram_pages = xpram_highest_page_index() + 1;
PRINT_INFO(" %u pages expanded memory found (%lu KB).\n",
xpram_pages, (unsigned long) xpram_pages*4);
pr_info(" %u pages expanded memory found (%lu KB).\n",
xpram_pages, (unsigned long) xpram_pages*4);
rc = xpram_setup_sizes(xpram_pages);
if (rc)
return rc;

41
drivers/s390/char/monreader.c
View file

@ -7,6 +7,9 @@
* Author: Gerald Schaefer <gerald.schaefer@de.ibm.com>
*/
#define KMSG_COMPONENT "monreader"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
@ -24,19 +27,6 @@
#include <asm/ebcdic.h>
#include <asm/extmem.h>
//#define MON_DEBUG /* Debug messages on/off */
#define MON_NAME "monreader"
#define P_INFO(x...) printk(KERN_INFO MON_NAME " info: " x)
#define P_ERROR(x...) printk(KERN_ERR MON_NAME " error: " x)
#define P_WARNING(x...) printk(KERN_WARNING MON_NAME " warning: " x)
#ifdef MON_DEBUG
#define P_DEBUG(x...) printk(KERN_DEBUG MON_NAME " debug: " x)
#else
#define P_DEBUG(x...) do {} while (0)
#endif
#define MON_COLLECT_SAMPLE 0x80
#define MON_COLLECT_EVENT 0x40
@ -172,7 +162,7 @@ static int mon_send_reply(struct mon_msg *monmsg,
} else
monmsg->replied_msglim = 1;
if (rc) {
P_ERROR("read, IUCV reply failed with rc = %i\n\n", rc);
pr_err("Reading monitor data failed with rc=%i\n", rc);
return -EIO;
}
return 0;
@ -251,7 +241,8 @@ static void mon_iucv_path_severed(struct iucv_path *path, u8 ipuser[16])
{
struct mon_private *monpriv = path->private;
P_ERROR("IUCV connection severed with rc = 0x%X\n", ipuser[0]);
pr_err("z/VM *MONITOR system service disconnected with rc=%i\n",
ipuser[0]);
iucv_path_sever(path, NULL);
atomic_set(&monpriv->iucv_severed, 1);
wake_up(&mon_conn_wait_queue);
@ -266,8 +257,7 @@ static void mon_iucv_message_pending(struct iucv_path *path,
memcpy(&monpriv->msg_array[monpriv->write_index]->msg,
msg, sizeof(*msg));
if (atomic_inc_return(&monpriv->msglim_count) == MON_MSGLIM) {
P_WARNING("IUCV message pending, message limit (%i) reached\n",
MON_MSGLIM);
pr_warning("The read queue for monitor data is full\n");
monpriv->msg_array[monpriv->write_index]->msglim_reached = 1;
}
monpriv->write_index = (monpriv->write_index + 1) % MON_MSGLIM;
@ -311,8 +301,8 @@ static int mon_open(struct inode *inode, struct file *filp)
rc = iucv_path_connect(monpriv->path, &monreader_iucv_handler,
MON_SERVICE, NULL, user_data_connect, monpriv);
if (rc) {
P_ERROR("iucv connection to *MONITOR failed with "
"IPUSER SEVER code = %i\n", rc);
pr_err("Connecting to the z/VM *MONITOR system service "
"failed with rc=%i\n", rc);
rc = -EIO;
goto out_path;
}
@ -353,7 +343,8 @@ static int mon_close(struct inode *inode, struct file *filp)
*/
rc = iucv_path_sever(monpriv->path, user_data_sever);
if (rc)
P_ERROR("close, iucv_sever failed with rc = %i\n", rc);
pr_warning("Disconnecting the z/VM *MONITOR system service "
"failed with rc=%i\n", rc);
atomic_set(&monpriv->iucv_severed, 0);
atomic_set(&monpriv->iucv_connected, 0);
@ -469,7 +460,8 @@ static int __init mon_init(void)
int rc;
if (!MACHINE_IS_VM) {
P_ERROR("not running under z/VM, driver not loaded\n");
pr_err("The z/VM *MONITOR record device driver cannot be "
"loaded without z/VM\n");
return -ENODEV;
}
@ -478,7 +470,8 @@ static int __init mon_init(void)
*/
rc = iucv_register(&monreader_iucv_handler, 1);
if (rc) {
P_ERROR("failed to register with iucv driver\n");
pr_err("The z/VM *MONITOR record device driver failed to "
"register with IUCV\n");
return rc;
}
@ -488,8 +481,8 @@ static int __init mon_init(void)
goto out_iucv;
}
if (rc != SEG_TYPE_SC) {
P_ERROR("segment %s has unsupported type, should be SC\n",
mon_dcss_name);
pr_err("The specified *MONITOR DCSS %s does not have the "
"required type SC\n", mon_dcss_name);
rc = -EINVAL;
goto out_iucv;
}

5
drivers/s390/char/monwriter.c
View file

@ -8,6 +8,9 @@
* Author(s): Melissa Howland <Melissa.Howland@us.ibm.com>
*/
#define KMSG_COMPONENT "monwriter"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
@ -64,9 +67,9 @@ static int monwrite_diag(struct monwrite_hdr *myhdr, char *buffer, int fcn)
rc = appldata_asm(&id, fcn, (void *) buffer, myhdr->datalen);
if (rc <= 0)
return rc;
pr_err("Writing monitor data failed with rc=%i\n", rc);
if (rc == 5)
return -EPERM;
printk("DIAG X'DC' error with return code: %i\n", rc);
return -EINVAL;
}

29
drivers/s390/char/sclp_cmd.c
View file

@ -6,6 +6,9 @@
* Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
*/
#define KMSG_COMPONENT "sclp_cmd"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/completion.h>
#include <linux/init.h>
#include <linux/errno.h>
@ -16,9 +19,8 @@
#include <linux/memory.h>
#include <asm/chpid.h>
#include <asm/sclp.h>
#include "sclp.h"
#define TAG "sclp_cmd: "
#include "sclp.h"
#define SCLP_CMDW_READ_SCP_INFO 0x00020001
#define SCLP_CMDW_READ_SCP_INFO_FORCED 0x00120001
@ -169,8 +171,8 @@ static int do_sync_request(sclp_cmdw_t cmd, void *sccb)
/* Check response. */
if (request->status != SCLP_REQ_DONE) {
printk(KERN_WARNING TAG "sync request failed "
"(cmd=0x%08x, status=0x%02x)\n", cmd, request->status);
pr_warning("sync request failed (cmd=0x%08x, "
"status=0x%02x)\n", cmd, request->status);
rc = -EIO;
}
out:
@ -224,8 +226,8 @@ int sclp_get_cpu_info(struct sclp_cpu_info *info)
if (rc)
goto out;
if (sccb->header.response_code != 0x0010) {
printk(KERN_WARNING TAG "readcpuinfo failed "
"(response=0x%04x)\n", sccb->header.response_code);
pr_warning("readcpuinfo failed (response=0x%04x)\n",
sccb->header.response_code);
rc = -EIO;
goto out;
}
@ -262,8 +264,9 @@ static int do_cpu_configure(sclp_cmdw_t cmd)
case 0x0120:
break;
default:
printk(KERN_WARNING TAG "configure cpu failed (cmd=0x%08x, "
"response=0x%04x)\n", cmd, sccb->header.response_code);
pr_warning("configure cpu failed (cmd=0x%08x, "
"response=0x%04x)\n", cmd,
sccb->header.response_code);
rc = -EIO;
break;
}
@ -626,9 +629,9 @@ static int do_chp_configure(sclp_cmdw_t cmd)
case 0x0450:
break;
default:
printk(KERN_WARNING TAG "configure channel-path failed "
"(cmd=0x%08x, response=0x%04x)\n", cmd,
sccb->header.response_code);
pr_warning("configure channel-path failed "
"(cmd=0x%08x, response=0x%04x)\n", cmd,
sccb->header.response_code);
rc = -EIO;
break;
}
@ -695,8 +698,8 @@ int sclp_chp_read_info(struct sclp_chp_info *info)
if (rc)
goto out;
if (sccb->header.response_code != 0x0010) {
printk(KERN_WARNING TAG "read channel-path info failed "
"(response=0x%04x)\n", sccb->header.response_code);
pr_warning("read channel-path info failed "
"(response=0x%04x)\n", sccb->header.response_code);
rc = -EIO;
goto out;
}

10
drivers/s390/char/sclp_config.c
View file

@ -5,15 +5,17 @@
* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
*/
#define KMSG_COMPONENT "sclp_config"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/cpu.h>
#include <linux/sysdev.h>
#include <linux/workqueue.h>
#include <asm/smp.h>
#include "sclp.h"
#define TAG "sclp_config: "
#include "sclp.h"
struct conf_mgm_data {
u8 reserved;
@ -31,7 +33,7 @@ static void sclp_cpu_capability_notify(struct work_struct *work)
int cpu;
struct sys_device *sysdev;
printk(KERN_WARNING TAG "cpu capability changed.\n");
pr_warning("cpu capability changed.\n");
get_online_cpus();
for_each_online_cpu(cpu) {
sysdev = get_cpu_sysdev(cpu);
@ -78,7 +80,7 @@ static int __init sclp_conf_init(void)
return rc;
if (!(sclp_conf_register.sclp_send_mask & EVTYP_CONFMGMDATA_MASK)) {
printk(KERN_WARNING TAG "no configuration management.\n");
pr_warning("no configuration management.\n");
sclp_unregister(&sclp_conf_register);
rc = -ENOSYS;
}

12
drivers/s390/char/sclp_cpi_sys.c
View file

@ -7,6 +7,9 @@
* Michael Ernst <mernst@de.ibm.com>
*/
#define KMSG_COMPONENT "sclp_cpi"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/stat.h>
@ -20,6 +23,7 @@
#include <linux/completion.h>
#include <asm/ebcdic.h>
#include <asm/sclp.h>
#include "sclp.h"
#include "sclp_rw.h"
#include "sclp_cpi_sys.h"
@ -150,16 +154,16 @@ static int cpi_req(void)
wait_for_completion(&completion);
if (req->status != SCLP_REQ_DONE) {
printk(KERN_WARNING "cpi: request failed (status=0x%02x)\n",
req->status);
pr_warning("request failed (status=0x%02x)\n",
req->status);
rc = -EIO;
goto out_free_req;
}
response = ((struct cpi_sccb *) req->sccb)->header.response_code;
if (response != 0x0020) {
printk(KERN_WARNING "cpi: failed with "
"response code 0x%x\n", response);
pr_warning("request failed with response code 0x%x\n",
response);
rc = -EIO;
}

18
drivers/s390/char/sclp_sdias.c
View file

@ -5,15 +5,18 @@
* Author(s): Michael Holzheu
*/
#define KMSG_COMPONENT "sclp_sdias"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/sched.h>
#include <asm/sclp.h>
#include <asm/debug.h>
#include <asm/ipl.h>
#include "sclp.h"
#include "sclp_rw.h"
#define TRACE(x...) debug_sprintf_event(sdias_dbf, 1, x)
#define ERROR_MSG(x...) printk ( KERN_ALERT "SDIAS: " x )
#define SDIAS_RETRIES 300
#define SDIAS_SLEEP_TICKS 50
@ -131,7 +134,7 @@ int sclp_sdias_blk_count(void)
rc = sdias_sclp_send(&request);
if (rc) {
ERROR_MSG("sclp_send failed for get_nr_blocks\n");
pr_err("sclp_send failed for get_nr_blocks\n");
goto out;
}
if (sccb.hdr.response_code != 0x0020) {
@ -145,7 +148,8 @@ int sclp_sdias_blk_count(void)
rc = sccb.evbuf.blk_cnt;
break;
default:
ERROR_MSG("SCLP error: %x\n", sccb.evbuf.event_status);
pr_err("SCLP error: %x\n",
sccb.evbuf.event_status);
rc = -EIO;
goto out;
}
@ -201,7 +205,7 @@ int sclp_sdias_copy(void *dest, int start_blk, int nr_blks)
rc = sdias_sclp_send(&request);
if (rc) {
ERROR_MSG("sclp_send failed: %x\n", rc);
pr_err("sclp_send failed: %x\n", rc);
goto out;
}
if (sccb.hdr.response_code != 0x0020) {
@ -219,9 +223,9 @@ int sclp_sdias_copy(void *dest, int start_blk, int nr_blks)
case EVSTATE_NO_DATA:
TRACE("no data\n");
default:
ERROR_MSG("Error from SCLP while copying hsa. "
"Event status = %x\n",
sccb.evbuf.event_status);
pr_err("Error from SCLP while copying hsa. "
"Event status = %x\n",
sccb.evbuf.event_status);
rc = -EIO;
}
out:

33
drivers/s390/char/sclp_vt220.c
View file

@ -583,23 +583,6 @@ sclp_vt220_chars_in_buffer(struct tty_struct *tty)
return count;
}
static void
__sclp_vt220_flush_buffer(void)
{
unsigned long flags;
sclp_vt220_emit_current();
spin_lock_irqsave(&sclp_vt220_lock, flags);
if (timer_pending(&sclp_vt220_timer))
del_timer(&sclp_vt220_timer);
while (sclp_vt220_outqueue_count > 0) {
spin_unlock_irqrestore(&sclp_vt220_lock, flags);
sclp_sync_wait();
spin_lock_irqsave(&sclp_vt220_lock, flags);
}
spin_unlock_irqrestore(&sclp_vt220_lock, flags);
}
/*
* Pass on all buffers to the hardware. Return only when there are no more
* buffers pending.
@ -745,6 +728,22 @@ sclp_vt220_con_device(struct console *c, int *index)
return sclp_vt220_driver;
}
static void __sclp_vt220_flush_buffer(void)
{
unsigned long flags;
sclp_vt220_emit_current();
spin_lock_irqsave(&sclp_vt220_lock, flags);
if (timer_pending(&sclp_vt220_timer))
del_timer(&sclp_vt220_timer);
while (sclp_vt220_outqueue_count > 0) {
spin_unlock_irqrestore(&sclp_vt220_lock, flags);
sclp_sync_wait();
spin_lock_irqsave(&sclp_vt220_lock, flags);
}
spin_unlock_irqrestore(&sclp_vt220_lock, flags);
}
static int
sclp_vt220_notify(struct notifier_block *self,
unsigned long event, void *data)

11
drivers/s390/char/vmcp.c
View file

@ -11,12 +11,14 @@
* The idea of this driver is based on cpint from Neale Ferguson and #CP in CMS
*/
#define KMSG_COMPONENT "vmcp"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/fs.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
#include <linux/smp_lock.h>
#include <asm/cpcmd.h>
#include <asm/debug.h>
#include <asm/uaccess.h>
@ -26,8 +28,6 @@ MODULE_LICENSE("GPL");
MODULE_AUTHOR("Christian Borntraeger <borntraeger@de.ibm.com>");
MODULE_DESCRIPTION("z/VM CP interface");
#define PRINTK_HEADER "vmcp: "
static debug_info_t *vmcp_debug;
static int vmcp_open(struct inode *inode, struct file *file)
@ -41,13 +41,11 @@ static int vmcp_open(struct inode *inode, struct file *file)
if (!session)
return -ENOMEM;
lock_kernel();
session->bufsize = PAGE_SIZE;
session->response = NULL;
session->resp_size = 0;
mutex_init(&session->mutex);
file->private_data = session;
unlock_kernel();
return nonseekable_open(inode, file);
}
@ -193,7 +191,8 @@ static int __init vmcp_init(void)
int ret;
if (!MACHINE_IS_VM) {
PRINT_WARN("z/VM CP interface is only available under z/VM\n");
pr_warning("The z/VM CP interface device driver cannot be "
"loaded without z/VM\n");
return -ENODEV;
}

26
drivers/s390/char/vmlogrdr.c
View file

@ -10,6 +10,10 @@
* Stefan Weinhuber <wein@de.ibm.com>
*
*/
#define KMSG_COMPONENT "vmlogrdr"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/errno.h>
@ -28,8 +32,6 @@
#include <linux/smp_lock.h>
#include <linux/string.h>
MODULE_AUTHOR
("(C) 2004 IBM Corporation by Xenia Tkatschow (xenia@us.ibm.com)\n"
" Stefan Weinhuber (wein@de.ibm.com)");
@ -174,8 +176,7 @@ static void vmlogrdr_iucv_path_severed(struct iucv_path *path, u8 ipuser[16])
struct vmlogrdr_priv_t * logptr = path->private;
u8 reason = (u8) ipuser[8];
printk (KERN_ERR "vmlogrdr: connection severed with"
" reason %i\n", reason);
pr_err("vmlogrdr: connection severed with reason %i\n", reason);
iucv_path_sever(path, NULL);
kfree(path);
@ -333,8 +334,8 @@ static int vmlogrdr_open (struct inode *inode, struct file *filp)
if (logptr->autorecording) {
ret = vmlogrdr_recording(logptr,1,logptr->autopurge);
if (ret)
printk (KERN_WARNING "vmlogrdr: failed to start "
"recording automatically\n");
pr_warning("vmlogrdr: failed to start "
"recording automatically\n");
}
/* create connection to the system service */
@ -345,9 +346,9 @@ static int vmlogrdr_open (struct inode *inode, struct file *filp)
logptr->system_service, NULL, NULL,
logptr);
if (connect_rc) {
printk (KERN_ERR "vmlogrdr: iucv connection to %s "
"failed with rc %i \n", logptr->system_service,
connect_rc);
pr_err("vmlogrdr: iucv connection to %s "
"failed with rc %i \n",
logptr->system_service, connect_rc);
goto out_path;
}
@ -388,8 +389,8 @@ static int vmlogrdr_release (struct inode *inode, struct file *filp)
if (logptr->autorecording) {
ret = vmlogrdr_recording(logptr,0,logptr->autopurge);
if (ret)
printk (KERN_WARNING "vmlogrdr: failed to stop "
"recording automatically\n");
pr_warning("vmlogrdr: failed to stop "
"recording automatically\n");
}
logptr->dev_in_use = 0;
@ -823,8 +824,7 @@ static int __init vmlogrdr_init(void)
dev_t dev;
if (! MACHINE_IS_VM) {
printk (KERN_ERR "vmlogrdr: not running under VM, "
"driver not loaded.\n");
pr_err("not running under VM, driver not loaded.\n");
return -ENODEV;
}

15
drivers/s390/char/vmur.c
View file

@ -8,6 +8,9 @@
* Frank Munzert <munzert@de.ibm.com>
*/
#define KMSG_COMPONENT "vmur"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/cdev.h>
#include <linux/smp_lock.h>
@ -40,8 +43,6 @@ MODULE_AUTHOR("IBM Corporation");
MODULE_DESCRIPTION("s390 z/VM virtual unit record device driver");
MODULE_LICENSE("GPL");
#define PRINTK_HEADER "vmur: "
static dev_t ur_first_dev_maj_min;
static struct class *vmur_class;
static struct debug_info *vmur_dbf;
@ -987,7 +988,8 @@ static int __init ur_init(void)
dev_t dev;
if (!MACHINE_IS_VM) {
PRINT_ERR("%s is only available under z/VM.\n", ur_banner);
pr_err("The %s cannot be loaded without z/VM\n",
ur_banner);
return -ENODEV;
}
@ -1006,7 +1008,8 @@ static int __init ur_init(void)
rc = alloc_chrdev_region(&dev, 0, NUM_MINORS, "vmur");
if (rc) {
PRINT_ERR("alloc_chrdev_region failed: err = %d\n", rc);
pr_err("Kernel function alloc_chrdev_region failed with "
"error code %d\n", rc);
goto fail_unregister_driver;
}
ur_first_dev_maj_min = MKDEV(MAJOR(dev), 0);
@ -1016,7 +1019,7 @@ static int __init ur_init(void)
rc = PTR_ERR(vmur_class);
goto fail_unregister_region;
}
PRINT_INFO("%s loaded.\n", ur_banner);
pr_info("%s loaded.\n", ur_banner);
return 0;
fail_unregister_region:
@ -1034,7 +1037,7 @@ static void __exit ur_exit(void)
unregister_chrdev_region(ur_first_dev_maj_min, NUM_MINORS);
ccw_driver_unregister(&ur_driver);
debug_unregister(vmur_dbf);
PRINT_INFO("%s unloaded.\n", ur_banner);
pr_info("%s unloaded.\n", ur_banner);
}
module_init(ur_init);

14
drivers/s390/char/zcore.c
View file

@ -9,6 +9,9 @@
* Author(s): Michael Holzheu
*/
#define KMSG_COMPONENT "zdump"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/init.h>
#include <linux/miscdevice.h>
#include <linux/utsname.h>
@ -24,8 +27,6 @@
#include "sclp.h"
#define TRACE(x...) debug_sprintf_event(zcore_dbf, 1, x)
#define MSG(x...) printk( KERN_ALERT x )
#define ERROR_MSG(x...) printk ( KERN_ALERT "DUMP: " x )
#define TO_USER 0
#define TO_KERNEL 1
@ -563,19 +564,19 @@ static int __init sys_info_init(enum arch_id arch)
switch (arch) {
case ARCH_S390X:
MSG("DETECTED 'S390X (64 bit) OS'\n");
pr_alert("DETECTED 'S390X (64 bit) OS'\n");
sys_info.sa_base = SAVE_AREA_BASE_S390X;
sys_info.sa_size = sizeof(struct save_area_s390x);
set_s390x_lc_mask(&sys_info.lc_mask);
break;
case ARCH_S390:
MSG("DETECTED 'S390 (32 bit) OS'\n");
pr_alert("DETECTED 'S390 (32 bit) OS'\n");
sys_info.sa_base = SAVE_AREA_BASE_S390;
sys_info.sa_size = sizeof(struct save_area_s390);
set_s390_lc_mask(&sys_info.lc_mask);
break;
default:
ERROR_MSG("unknown architecture 0x%x.\n",arch);
pr_alert("0x%x is an unknown architecture.\n",arch);
return -EINVAL;
}
sys_info.arch = arch;
@ -674,7 +675,8 @@ static int __init zcore_init(void)
#ifndef __s390x__
if (arch == ARCH_S390X) {
ERROR_MSG("32 bit dumper can't dump 64 bit system!\n");
pr_alert("The 32-bit dump tool cannot be used for a "
"64-bit system\n");
rc = -EINVAL;
goto fail;
}

14
drivers/s390/cio/blacklist.c
View file

@ -9,6 +9,9 @@
* Arnd Bergmann (arndb@de.ibm.com)
*/
#define KMSG_COMPONENT "cio"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/init.h>
#include <linux/vmalloc.h>
#include <linux/slab.h>
@ -50,9 +53,10 @@ static int blacklist_range(range_action action, unsigned int from_ssid,
{
if ((from_ssid > to_ssid) || ((from_ssid == to_ssid) && (from > to))) {
if (msgtrigger)
printk(KERN_WARNING "cio: Invalid cio_ignore range "
"0.%x.%04x-0.%x.%04x\n", from_ssid, from,
to_ssid, to);
pr_warning("0.%x.%04x to 0.%x.%04x is not a valid "
"range for cio_ignore\n", from_ssid, from,
to_ssid, to);
return 1;
}
@ -140,8 +144,8 @@ static int parse_busid(char *str, unsigned int *cssid, unsigned int *ssid,
rc = 0;
out:
if (rc && msgtrigger)
printk(KERN_WARNING "cio: Invalid cio_ignore device '%s'\n",
str);
pr_warning("%s is not a valid device for the cio_ignore "
"kernel parameter\n", str);
return rc;
}

26
drivers/s390/cio/ccwgroup.c
View file

@ -19,6 +19,8 @@
#include <asm/ccwdev.h>
#include <asm/ccwgroup.h>
#define CCW_BUS_ID_SIZE 20
/* In Linux 2.4, we had a channel device layer called "chandev"
* that did all sorts of obscure stuff for networking devices.
* This is another driver that serves as a replacement for just
@ -89,15 +91,23 @@ ccwgroup_ungroup_store(struct device *dev, struct device_attribute *attr, const
gdev = to_ccwgroupdev(dev);
if (gdev->state != CCWGROUP_OFFLINE)
return -EINVAL;
/* Prevent concurrent online/offline processing and ungrouping. */
if (atomic_cmpxchg(&gdev->onoff, 0, 1) != 0)
return -EAGAIN;
if (gdev->state != CCWGROUP_OFFLINE) {
rc = -EINVAL;
goto out;
}
/* Note that we cannot unregister the device from one of its
* attribute methods, so we have to use this roundabout approach.
*/
rc = device_schedule_callback(dev, ccwgroup_ungroup_callback);
if (rc)
count = rc;
out:
if (rc) {
/* Release onoff "lock" when ungrouping failed. */
atomic_set(&gdev->onoff, 0);
return rc;
}
return count;
}
@ -172,7 +182,7 @@ static int __get_next_bus_id(const char **buf, char *bus_id)
len = end - start + 1;
end++;
}
if (len < BUS_ID_SIZE) {
if (len < CCW_BUS_ID_SIZE) {
strlcpy(bus_id, start, len);
rc = 0;
} else
@ -181,7 +191,7 @@ static int __get_next_bus_id(const char **buf, char *bus_id)
return rc;
}
static int __is_valid_bus_id(char bus_id[BUS_ID_SIZE])
static int __is_valid_bus_id(char bus_id[CCW_BUS_ID_SIZE])
{
int cssid, ssid, devno;
@ -213,7 +223,7 @@ int ccwgroup_create_from_string(struct device *root, unsigned int creator_id,
{
struct ccwgroup_device *gdev;
int rc, i;
char tmp_bus_id[BUS_ID_SIZE];
char tmp_bus_id[CCW_BUS_ID_SIZE];
const char *curr_buf;
gdev = kzalloc(sizeof(*gdev) + num_devices * sizeof(gdev->cdev[0]),

8
drivers/s390/cio/chsc.c
View file

@ -8,6 +8,9 @@
* Arnd Bergmann (arndb@de.ibm.com)
*/
#define KMSG_COMPONENT "cio"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/init.h>
@ -333,6 +336,7 @@ static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area)
struct chp_config_data *data;
struct chp_id chpid;
int num;
char *events[3] = {"configure", "deconfigure", "cancel deconfigure"};
CIO_CRW_EVENT(4, "chsc: channel-path-configuration notification\n");
if (sei_area->rs != 0)
@ -343,8 +347,8 @@ static void chsc_process_sei_chp_config(struct chsc_sei_area *sei_area)
if (!chp_test_bit(data->map, num))
continue;
chpid.id = num;
printk(KERN_WARNING "cio: processing configure event %d for "
"chpid %x.%02x\n", data->op, chpid.cssid, chpid.id);
pr_notice("Processing %s for channel path %x.%02x\n",
events[data->op], chpid.cssid, chpid.id);
switch (data->op) {
case 0:
chp_cfg_schedule(chpid, 1);

2
drivers/s390/cio/chsc_sch.c
View file

@ -61,7 +61,7 @@ static void chsc_subchannel_irq(struct subchannel *sch)
}
private->request = NULL;
memcpy(&request->irb, irb, sizeof(*irb));
stsch(sch->schid, &sch->schib);
cio_update_schib(sch);
complete(&request->completion);
put_device(&sch->dev);
}

251
drivers/s390/cio/cio.c
View file

@ -9,6 +9,9 @@
* Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
#define KMSG_COMPONENT "cio"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
@ -104,44 +107,6 @@ cio_get_options (struct subchannel *sch)
return flags;
}
/*
* Use tpi to get a pending interrupt, call the interrupt handler and
* return a pointer to the subchannel structure.
*/
static int
cio_tpi(void)
{
struct tpi_info *tpi_info;
struct subchannel *sch;
struct irb *irb;
int irq_context;
tpi_info = (struct tpi_info *) __LC_SUBCHANNEL_ID;
if (tpi (NULL) != 1)
return 0;
irb = (struct irb *) __LC_IRB;
/* Store interrupt response block to lowcore. */
if (tsch (tpi_info->schid, irb) != 0)
/* Not status pending or not operational. */
return 1;
sch = (struct subchannel *)(unsigned long)tpi_info->intparm;
if (!sch)
return 1;
irq_context = in_interrupt();
if (!irq_context)
local_bh_disable();
irq_enter ();
spin_lock(sch->lock);
memcpy(&sch->schib.scsw, &irb->scsw, sizeof(union scsw));
if (sch->driver && sch->driver->irq)
sch->driver->irq(sch);
spin_unlock(sch->lock);
irq_exit ();
if (!irq_context)
_local_bh_enable();
return 1;
}
static int
cio_start_handle_notoper(struct subchannel *sch, __u8 lpm)
{
@ -152,11 +117,13 @@ cio_start_handle_notoper(struct subchannel *sch, __u8 lpm)
else
sch->lpm = 0;
stsch (sch->schid, &sch->schib);
CIO_MSG_EVENT(2, "cio_start: 'not oper' status for "
"subchannel 0.%x.%04x!\n", sch->schid.ssid,
sch->schid.sch_no);
if (cio_update_schib(sch))
return -ENODEV;
sprintf(dbf_text, "no%s", dev_name(&sch->dev));
CIO_TRACE_EVENT(0, dbf_text);
CIO_HEX_EVENT(0, &sch->schib, sizeof (struct schib));
@ -354,7 +321,8 @@ cio_cancel (struct subchannel *sch)
switch (ccode) {
case 0: /* success */
/* Update information in scsw. */
stsch (sch->schid, &sch->schib);
if (cio_update_schib(sch))
return -ENODEV;
return 0;
case 1: /* status pending */
return -EBUSY;
@ -365,36 +333,93 @@ cio_cancel (struct subchannel *sch)
}
}
/*
* Function: cio_modify
* Issues a "Modify Subchannel" on the specified subchannel
*/
int
cio_modify (struct subchannel *sch)
{
int ccode, retry, ret;
ret = 0;
static void cio_apply_config(struct subchannel *sch, struct schib *schib)
{
schib->pmcw.intparm = sch->config.intparm;
schib->pmcw.mbi = sch->config.mbi;
schib->pmcw.isc = sch->config.isc;
schib->pmcw.ena = sch->config.ena;
schib->pmcw.mme = sch->config.mme;
schib->pmcw.mp = sch->config.mp;
schib->pmcw.csense = sch->config.csense;
schib->pmcw.mbfc = sch->config.mbfc;
if (sch->config.mbfc)
schib->mba = sch->config.mba;
}
static int cio_check_config(struct subchannel *sch, struct schib *schib)
{
return (schib->pmcw.intparm == sch->config.intparm) &&
(schib->pmcw.mbi == sch->config.mbi) &&
(schib->pmcw.isc == sch->config.isc) &&
(schib->pmcw.ena == sch->config.ena) &&
(schib->pmcw.mme == sch->config.mme) &&
(schib->pmcw.mp == sch->config.mp) &&
(schib->pmcw.csense == sch->config.csense) &&
(schib->pmcw.mbfc == sch->config.mbfc) &&
(!sch->config.mbfc || (schib->mba == sch->config.mba));
}
/*
* cio_commit_config - apply configuration to the subchannel
*/
int cio_commit_config(struct subchannel *sch)
{
struct schib schib;
int ccode, retry, ret = 0;
if (stsch(sch->schid, &schib) || !css_sch_is_valid(&schib))
return -ENODEV;
for (retry = 0; retry < 5; retry++) {
ccode = msch_err (sch->schid, &sch->schib);
if (ccode < 0) /* -EIO if msch gets a program check. */
/* copy desired changes to local schib */
cio_apply_config(sch, &schib);
ccode = msch_err(sch->schid, &schib);
if (ccode < 0) /* -EIO if msch gets a program check. */
return ccode;
switch (ccode) {
case 0: /* successfull */
return 0;
case 1: /* status pending */
if (stsch(sch->schid, &schib) ||
!css_sch_is_valid(&schib))
return -ENODEV;
if (cio_check_config(sch, &schib)) {
/* commit changes from local schib */
memcpy(&sch->schib, &schib, sizeof(schib));
return 0;
}
ret = -EAGAIN;
break;
case 1: /* status pending */
return -EBUSY;
case 2: /* busy */
udelay (100); /* allow for recovery */
case 2: /* busy */
udelay(100); /* allow for recovery */
ret = -EBUSY;
break;
case 3: /* not operational */
case 3: /* not operational */
return -ENODEV;
}
}
return ret;
}
/**
* cio_update_schib - Perform stsch and update schib if subchannel is valid.
* @sch: subchannel on which to perform stsch
* Return zero on success, -ENODEV otherwise.
*/
int cio_update_schib(struct subchannel *sch)
{
struct schib schib;
if (stsch(sch->schid, &schib) || !css_sch_is_valid(&schib))
return -ENODEV;
memcpy(&sch->schib, &schib, sizeof(schib));
return 0;
}
EXPORT_SYMBOL_GPL(cio_update_schib);
/**
* cio_enable_subchannel - enable a subchannel.
* @sch: subchannel to be enabled
@ -403,7 +428,6 @@ cio_modify (struct subchannel *sch)
int cio_enable_subchannel(struct subchannel *sch, u32 intparm)
{
char dbf_txt[15];
int ccode;
int retry;
int ret;
@ -412,33 +436,27 @@ int cio_enable_subchannel(struct subchannel *sch, u32 intparm)
if (sch_is_pseudo_sch(sch))
return -EINVAL;
ccode = stsch (sch->schid, &sch->schib);
if (ccode)
if (cio_update_schib(sch))
return -ENODEV;
for (retry = 5, ret = 0; retry > 0; retry--) {
sch->schib.pmcw.ena = 1;
sch->schib.pmcw.isc = sch->isc;
sch->schib.pmcw.intparm = intparm;
ret = cio_modify(sch);
if (ret == -ENODEV)
break;
if (ret == -EIO)
sch->config.ena = 1;
sch->config.isc = sch->isc;
sch->config.intparm = intparm;
for (retry = 0; retry < 3; retry++) {
ret = cio_commit_config(sch);
if (ret == -EIO) {
/*
* Got a program check in cio_modify. Try without
* Got a program check in msch. Try without
* the concurrent sense bit the next time.
*/
sch->schib.pmcw.csense = 0;
if (ret == 0) {
stsch (sch->schid, &sch->schib);
if (sch->schib.pmcw.ena)
break;
}
if (ret == -EBUSY) {
sch->config.csense = 0;
} else if (ret == -EBUSY) {
struct irb irb;
if (tsch(sch->schid, &irb) != 0)
break;
}
} else
break;
}
sprintf (dbf_txt, "ret:%d", ret);
CIO_TRACE_EVENT (2, dbf_txt);
@ -453,8 +471,6 @@ EXPORT_SYMBOL_GPL(cio_enable_subchannel);
int cio_disable_subchannel(struct subchannel *sch)
{
char dbf_txt[15];
int ccode;
int retry;
int ret;
CIO_TRACE_EVENT (2, "dissch");
@ -462,8 +478,7 @@ int cio_disable_subchannel(struct subchannel *sch)
if (sch_is_pseudo_sch(sch))
return 0;
ccode = stsch (sch->schid, &sch->schib);
if (ccode == 3) /* Not operational. */
if (cio_update_schib(sch))
return -ENODEV;
if (scsw_actl(&sch->schib.scsw) != 0)
@ -473,24 +488,9 @@ int cio_disable_subchannel(struct subchannel *sch)
*/
return -EBUSY;
for (retry = 5, ret = 0; retry > 0; retry--) {
sch->schib.pmcw.ena = 0;
ret = cio_modify(sch);
if (ret == -ENODEV)
break;
if (ret == -EBUSY)
/*
* The subchannel is busy or status pending.
* We'll disable when the next interrupt was delivered
* via the state machine.
*/
break;
if (ret == 0) {
stsch (sch->schid, &sch->schib);
if (!sch->schib.pmcw.ena)
break;
}
}
sch->config.ena = 0;
ret = cio_commit_config(sch);
sprintf (dbf_txt, "ret:%d", ret);
CIO_TRACE_EVENT (2, dbf_txt);
return ret;
@ -687,6 +687,43 @@ static char console_sch_name[10] = "0.x.xxxx";
static struct io_subchannel_private console_priv;
static int console_subchannel_in_use;
/*
* Use tpi to get a pending interrupt, call the interrupt handler and
* return a pointer to the subchannel structure.
*/
static int cio_tpi(void)
{
struct tpi_info *tpi_info;
struct subchannel *sch;
struct irb *irb;
int irq_context;
tpi_info = (struct tpi_info *) __LC_SUBCHANNEL_ID;
if (tpi(NULL) != 1)
return 0;
irb = (struct irb *) __LC_IRB;
/* Store interrupt response block to lowcore. */
if (tsch(tpi_info->schid, irb) != 0)
/* Not status pending or not operational. */
return 1;
sch = (struct subchannel *)(unsigned long)tpi_info->intparm;
if (!sch)
return 1;
irq_context = in_interrupt();
if (!irq_context)
local_bh_disable();
irq_enter();
spin_lock(sch->lock);
memcpy(&sch->schib.scsw, &irb->scsw, sizeof(union scsw));
if (sch->driver && sch->driver->irq)
sch->driver->irq(sch);
spin_unlock(sch->lock);
irq_exit();
if (!irq_context)
_local_bh_enable();
return 1;
}
void *cio_get_console_priv(void)
{
return &console_priv;
@ -780,7 +817,7 @@ cio_probe_console(void)
sch_no = cio_get_console_sch_no();
if (sch_no == -1) {
console_subchannel_in_use = 0;
printk(KERN_WARNING "cio: No ccw console found!\n");
pr_warning("No CCW console was found\n");
return ERR_PTR(-ENODEV);
}
memset(&console_subchannel, 0, sizeof(struct subchannel));
@ -796,10 +833,9 @@ cio_probe_console(void)
* enable console I/O-interrupt subclass
*/
isc_register(CONSOLE_ISC);
console_subchannel.schib.pmcw.isc = CONSOLE_ISC;
console_subchannel.schib.pmcw.intparm =
(u32)(addr_t)&console_subchannel;
ret = cio_modify(&console_subchannel);
console_subchannel.config.isc = CONSOLE_ISC;
console_subchannel.config.intparm = (u32)(addr_t)&console_subchannel;
ret = cio_commit_config(&console_subchannel);
if (ret) {
isc_unregister(CONSOLE_ISC);
console_subchannel_in_use = 0;
@ -811,8 +847,8 @@ cio_probe_console(void)
void
cio_release_console(void)
{
console_subchannel.schib.pmcw.intparm = 0;
cio_modify(&console_subchannel);
console_subchannel.config.intparm = 0;
cio_commit_config(&console_subchannel);
isc_unregister(CONSOLE_ISC);
console_subchannel_in_use = 0;
}
@ -852,7 +888,8 @@ __disable_subchannel_easy(struct subchannel_id schid, struct schib *schib)
cc = msch(schid, schib);
if (cc)
return (cc==3?-ENODEV:-EBUSY);
stsch(schid, schib);
if (stsch(schid, schib) || !css_sch_is_valid(schib))
return -ENODEV;
if (!schib->pmcw.ena)
return 0;
}

18
drivers/s390/cio/cio.h
View file

@ -45,6 +45,19 @@ struct pmcw {
/* ... in an operand exception. */
} __attribute__ ((packed));
/* Target SCHIB configuration. */
struct schib_config {
u64 mba;
u32 intparm;
u16 mbi;
u32 isc:3;
u32 ena:1;
u32 mme:2;
u32 mp:1;
u32 csense:1;
u32 mbfc:1;
} __attribute__ ((packed));
/*
* subchannel information block
*/
@ -82,6 +95,8 @@ struct subchannel {
struct device dev; /* entry in device tree */
struct css_driver *driver;
void *private; /* private per subchannel type data */
struct work_struct work;
struct schib_config config;
} __attribute__ ((aligned(8)));
#define IO_INTERRUPT_TYPE 0 /* I/O interrupt type */
@ -100,7 +115,8 @@ extern int cio_start_key (struct subchannel *, struct ccw1 *, __u8, __u8);
extern int cio_cancel (struct subchannel *);
extern int cio_set_options (struct subchannel *, int);
extern int cio_get_options (struct subchannel *);
extern int cio_modify (struct subchannel *);
extern int cio_update_schib(struct subchannel *sch);
extern int cio_commit_config(struct subchannel *sch);
int cio_tm_start_key(struct subchannel *sch, struct tcw *tcw, u8 lpm, u8 key);
int cio_tm_intrg(struct subchannel *sch);

63
drivers/s390/cio/cmf.c
View file

@ -25,6 +25,9 @@
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define KMSG_COMPONENT "cio"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/bootmem.h>
#include <linux/device.h>
#include <linux/init.h>
@ -185,56 +188,19 @@ static inline void cmf_activate(void *area, unsigned int onoff)
static int set_schib(struct ccw_device *cdev, u32 mme, int mbfc,
unsigned long address)
{
int ret;
int retry;
struct subchannel *sch;
struct schib *schib;
sch = to_subchannel(cdev->dev.parent);
schib = &sch->schib;
/* msch can silently fail, so do it again if necessary */
for (retry = 0; retry < 3; retry++) {
/* prepare schib */
stsch(sch->schid, schib);
schib->pmcw.mme = mme;
schib->pmcw.mbfc = mbfc;
/* address can be either a block address or a block index */
if (mbfc)
schib->mba = address;
else
schib->pmcw.mbi = address;
/* try to submit it */
switch(ret = msch_err(sch->schid, schib)) {
case 0:
break;
case 1:
case 2: /* in I/O or status pending */
ret = -EBUSY;
break;
case 3: /* subchannel is no longer valid */
ret = -ENODEV;
break;
default: /* msch caught an exception */
ret = -EINVAL;
break;
}
stsch(sch->schid, schib); /* restore the schib */
sch->config.mme = mme;
sch->config.mbfc = mbfc;
/* address can be either a block address or a block index */
if (mbfc)
sch->config.mba = address;
else
sch->config.mbi = address;
if (ret)
break;
/* check if it worked */
if (schib->pmcw.mme == mme &&
schib->pmcw.mbfc == mbfc &&
(mbfc ? (schib->mba == address)
: (schib->pmcw.mbi == address)))
return 0;
ret = -EINVAL;
}
return ret;
return cio_commit_config(sch);
}
struct set_schib_struct {
@ -338,7 +304,7 @@ static int cmf_copy_block(struct ccw_device *cdev)
sch = to_subchannel(cdev->dev.parent);
if (stsch(sch->schid, &sch->schib))
if (cio_update_schib(sch))
return -ENODEV;
if (scsw_fctl(&sch->schib.scsw) & SCSW_FCTL_START_FUNC) {
@ -1359,9 +1325,8 @@ static int __init init_cmf(void)
default:
return 1;
}
printk(KERN_INFO "cio: Channel measurement facility using %s "
"format (%s)\n", format_string, detect_string);
pr_info("Channel measurement facility initialized using format "
"%s (mode %s)\n", format_string, detect_string);
return 0;
}

12
drivers/s390/cio/css.c
View file

@ -6,6 +6,10 @@
* Author(s): Arnd Bergmann (arndb@de.ibm.com)
* Cornelia Huck (cornelia.huck@de.ibm.com)
*/
#define KMSG_COMPONENT "cio"
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
@ -128,8 +132,8 @@ css_free_subchannel(struct subchannel *sch)
{
if (sch) {
/* Reset intparm to zeroes. */
sch->schib.pmcw.intparm = 0;
cio_modify(sch);
sch->config.intparm = 0;
cio_commit_config(sch);
kfree(sch->lock);
kfree(sch);
}
@ -844,8 +848,8 @@ out:
s390_unregister_crw_handler(CRW_RSC_CSS);
chsc_free_sei_area();
kfree(slow_subchannel_set);
printk(KERN_WARNING"cio: failed to initialize css driver (%d)!\n",
ret);
pr_alert("The CSS device driver initialization failed with "
"errno=%d\n", ret);
return ret;
}

239
drivers/s390/cio/device.c
View file

@ -376,19 +376,23 @@ int ccw_device_set_offline(struct ccw_device *cdev)
dev_fsm_event(cdev, DEV_EVENT_NOTOPER);
}
spin_unlock_irq(cdev->ccwlock);
/* Give up reference from ccw_device_set_online(). */
put_device(&cdev->dev);
return ret;
}
spin_unlock_irq(cdev->ccwlock);
if (ret == 0)
if (ret == 0) {
wait_event(cdev->private->wait_q, dev_fsm_final_state(cdev));
else {
/* Give up reference from ccw_device_set_online(). */
put_device(&cdev->dev);
} else {
CIO_MSG_EVENT(0, "ccw_device_offline returned %d, "
"device 0.%x.%04x\n",
ret, cdev->private->dev_id.ssid,
cdev->private->dev_id.devno);
cdev->online = 1;
}
return ret;
return ret;
}
/**
@ -411,6 +415,9 @@ int ccw_device_set_online(struct ccw_device *cdev)
return -ENODEV;
if (cdev->online || !cdev->drv)
return -EINVAL;
/* Hold on to an extra reference while device is online. */
if (!get_device(&cdev->dev))
return -ENODEV;
spin_lock_irq(cdev->ccwlock);
ret = ccw_device_online(cdev);
@ -422,10 +429,15 @@ int ccw_device_set_online(struct ccw_device *cdev)
"device 0.%x.%04x\n",
ret, cdev->private->dev_id.ssid,
cdev->private->dev_id.devno);
/* Give up online reference since onlining failed. */
put_device(&cdev->dev);
return ret;
}
if (cdev->private->state != DEV_STATE_ONLINE)
if (cdev->private->state != DEV_STATE_ONLINE) {
/* Give up online reference since onlining failed. */
put_device(&cdev->dev);
return -ENODEV;
}
if (!cdev->drv->set_online || cdev->drv->set_online(cdev) == 0) {
cdev->online = 1;
return 0;
@ -440,6 +452,8 @@ int ccw_device_set_online(struct ccw_device *cdev)
"device 0.%x.%04x\n",
ret, cdev->private->dev_id.ssid,
cdev->private->dev_id.devno);
/* Give up online reference since onlining failed. */
put_device(&cdev->dev);
return (ret == 0) ? -ENODEV : ret;
}
@ -704,6 +718,8 @@ ccw_device_release(struct device *dev)
struct ccw_device *cdev;
cdev = to_ccwdev(dev);
/* Release reference of parent subchannel. */
put_device(cdev->dev.parent);
kfree(cdev->private);
kfree(cdev);
}
@ -735,8 +751,8 @@ static int io_subchannel_initialize_dev(struct subchannel *sch,
/* Do first half of device_register. */
device_initialize(&cdev->dev);
if (!get_device(&sch->dev)) {
if (cdev->dev.release)
cdev->dev.release(&cdev->dev);
/* Release reference from device_initialize(). */
put_device(&cdev->dev);
return -ENODEV;
}
return 0;
@ -778,37 +794,55 @@ static void sch_attach_disconnected_device(struct subchannel *sch,
struct subchannel *other_sch;
int ret;
other_sch = to_subchannel(get_device(cdev->dev.parent));
/* Get reference for new parent. */
if (!get_device(&sch->dev))
return;
other_sch = to_subchannel(cdev->dev.parent);
/* Note: device_move() changes cdev->dev.parent */
ret = device_move(&cdev->dev, &sch->dev);
if (ret) {
CIO_MSG_EVENT(0, "Moving disconnected device 0.%x.%04x failed "
"(ret=%d)!\n", cdev->private->dev_id.ssid,
cdev->private->dev_id.devno, ret);
put_device(&other_sch->dev);
/* Put reference for new parent. */
put_device(&sch->dev);
return;
}
sch_set_cdev(other_sch, NULL);
/* No need to keep a subchannel without ccw device around. */
css_sch_device_unregister(other_sch);
put_device(&other_sch->dev);
sch_attach_device(sch, cdev);
/* Put reference for old parent. */
put_device(&other_sch->dev);
}
static void sch_attach_orphaned_device(struct subchannel *sch,
struct ccw_device *cdev)
{
int ret;
struct subchannel *pseudo_sch;
/* Try to move the ccw device to its new subchannel. */
/* Get reference for new parent. */
if (!get_device(&sch->dev))
return;
pseudo_sch = to_subchannel(cdev->dev.parent);
/*
* Try to move the ccw device to its new subchannel.
* Note: device_move() changes cdev->dev.parent
*/
ret = device_move(&cdev->dev, &sch->dev);
if (ret) {
CIO_MSG_EVENT(0, "Moving device 0.%x.%04x from orphanage "
"failed (ret=%d)!\n",
cdev->private->dev_id.ssid,
cdev->private->dev_id.devno, ret);
/* Put reference for new parent. */
put_device(&sch->dev);
return;
}
sch_attach_device(sch, cdev);
/* Put reference on pseudo subchannel. */
put_device(&pseudo_sch->dev);
}
static void sch_create_and_recog_new_device(struct subchannel *sch)
@ -830,9 +864,11 @@ static void sch_create_and_recog_new_device(struct subchannel *sch)
spin_lock_irq(sch->lock);
sch_set_cdev(sch, NULL);
spin_unlock_irq(sch->lock);
if (cdev->dev.release)
cdev->dev.release(&cdev->dev);
css_sch_device_unregister(sch);
/* Put reference from io_subchannel_create_ccwdev(). */
put_device(&sch->dev);
/* Give up initial reference. */
put_device(&cdev->dev);
}
}
@ -854,15 +890,20 @@ void ccw_device_move_to_orphanage(struct work_struct *work)
dev_id.devno = sch->schib.pmcw.dev;
dev_id.ssid = sch->schid.ssid;
/* Increase refcount for pseudo subchannel. */
get_device(&css->pseudo_subchannel->dev);
/*
* Move the orphaned ccw device to the orphanage so the replacing
* ccw device can take its place on the subchannel.
* Note: device_move() changes cdev->dev.parent
*/
ret = device_move(&cdev->dev, &css->pseudo_subchannel->dev);
if (ret) {
CIO_MSG_EVENT(0, "Moving device 0.%x.%04x to orphanage failed "
"(ret=%d)!\n", cdev->private->dev_id.ssid,
cdev->private->dev_id.devno, ret);
/* Decrease refcount for pseudo subchannel again. */
put_device(&css->pseudo_subchannel->dev);
return;
}
cdev->ccwlock = css->pseudo_subchannel->lock;
@ -875,17 +916,23 @@ void ccw_device_move_to_orphanage(struct work_struct *work)
if (replacing_cdev) {
sch_attach_disconnected_device(sch, replacing_cdev);
/* Release reference from get_disc_ccwdev_by_dev_id() */
put_device(&cdev->dev);
put_device(&replacing_cdev->dev);
/* Release reference of subchannel from old cdev. */
put_device(&sch->dev);
return;
}
replacing_cdev = get_orphaned_ccwdev_by_dev_id(css, &dev_id);
if (replacing_cdev) {
sch_attach_orphaned_device(sch, replacing_cdev);
/* Release reference from get_orphaned_ccwdev_by_dev_id() */
put_device(&cdev->dev);
put_device(&replacing_cdev->dev);
/* Release reference of subchannel from old cdev. */
put_device(&sch->dev);
return;
}
sch_create_and_recog_new_device(sch);
/* Release reference of subchannel from old cdev. */
put_device(&sch->dev);
}
/*
@ -903,6 +950,14 @@ io_subchannel_register(struct work_struct *work)
priv = container_of(work, struct ccw_device_private, kick_work);
cdev = priv->cdev;
sch = to_subchannel(cdev->dev.parent);
/*
* Check if subchannel is still registered. It may have become
* unregistered if a machine check hit us after finishing
* device recognition but before the register work could be
* queued.
*/
if (!device_is_registered(&sch->dev))
goto out_err;
css_update_ssd_info(sch);
/*
* io_subchannel_register() will also be called after device
@ -910,7 +965,7 @@ io_subchannel_register(struct work_struct *work)
* be registered). We need to reprobe since we may now have sense id
* information.
*/
if (klist_node_attached(&cdev->dev.knode_parent)) {
if (device_is_registered(&cdev->dev)) {
if (!cdev->drv) {
ret = device_reprobe(&cdev->dev);
if (ret)
@ -934,22 +989,19 @@ io_subchannel_register(struct work_struct *work)
CIO_MSG_EVENT(0, "Could not register ccw dev 0.%x.%04x: %d\n",
cdev->private->dev_id.ssid,
cdev->private->dev_id.devno, ret);
put_device(&cdev->dev);
spin_lock_irqsave(sch->lock, flags);
sch_set_cdev(sch, NULL);
spin_unlock_irqrestore(sch->lock, flags);
kfree (cdev->private);
kfree (cdev);
put_device(&sch->dev);
if (atomic_dec_and_test(&ccw_device_init_count))
wake_up(&ccw_device_init_wq);
return;
/* Release initial device reference. */
put_device(&cdev->dev);
goto out_err;
}
put_device(&cdev->dev);
out:
cdev->private->flags.recog_done = 1;
put_device(&sch->dev);
wake_up(&cdev->private->wait_q);
out_err:
/* Release reference for workqueue processing. */
put_device(&cdev->dev);
if (atomic_dec_and_test(&ccw_device_init_count))
wake_up(&ccw_device_init_wq);
}
@ -968,8 +1020,8 @@ static void ccw_device_call_sch_unregister(struct work_struct *work)
sch = to_subchannel(cdev->dev.parent);
css_sch_device_unregister(sch);
/* Reset intparm to zeroes. */
sch->schib.pmcw.intparm = 0;
cio_modify(sch);
sch->config.intparm = 0;
cio_commit_config(sch);
/* Release cdev reference for workqueue processing.*/
put_device(&cdev->dev);
/* Release subchannel reference for local processing. */
@ -998,8 +1050,6 @@ io_subchannel_recog_done(struct ccw_device *cdev)
PREPARE_WORK(&cdev->private->kick_work,
ccw_device_call_sch_unregister);
queue_work(slow_path_wq, &cdev->private->kick_work);
/* Release subchannel reference for asynchronous recognition. */
put_device(&sch->dev);
if (atomic_dec_and_test(&ccw_device_init_count))
wake_up(&ccw_device_init_wq);
break;
@ -1070,10 +1120,15 @@ static void ccw_device_move_to_sch(struct work_struct *work)
priv = container_of(work, struct ccw_device_private, kick_work);
sch = priv->sch;
cdev = priv->cdev;
former_parent = ccw_device_is_orphan(cdev) ?
NULL : to_subchannel(get_device(cdev->dev.parent));
former_parent = to_subchannel(cdev->dev.parent);
/* Get reference for new parent. */
if (!get_device(&sch->dev))
return;
mutex_lock(&sch->reg_mutex);
/* Try to move the ccw device to its new subchannel. */
/*
* Try to move the ccw device to its new subchannel.
* Note: device_move() changes cdev->dev.parent
*/
rc = device_move(&cdev->dev, &sch->dev);
mutex_unlock(&sch->reg_mutex);
if (rc) {
@ -1083,21 +1138,23 @@ static void ccw_device_move_to_sch(struct work_struct *work)
cdev->private->dev_id.devno, sch->schid.ssid,
sch->schid.sch_no, rc);
css_sch_device_unregister(sch);
/* Put reference for new parent again. */
put_device(&sch->dev);
goto out;
}
if (former_parent) {
if (!sch_is_pseudo_sch(former_parent)) {
spin_lock_irq(former_parent->lock);
sch_set_cdev(former_parent, NULL);
spin_unlock_irq(former_parent->lock);
css_sch_device_unregister(former_parent);
/* Reset intparm to zeroes. */
former_parent->schib.pmcw.intparm = 0;
cio_modify(former_parent);
former_parent->config.intparm = 0;
cio_commit_config(former_parent);
}
sch_attach_device(sch, cdev);
out:
if (former_parent)
put_device(&former_parent->dev);
/* Put reference for old parent. */
put_device(&former_parent->dev);
put_device(&cdev->dev);
}
@ -1113,6 +1170,15 @@ static void io_subchannel_irq(struct subchannel *sch)
dev_fsm_event(cdev, DEV_EVENT_INTERRUPT);
}
void io_subchannel_init_config(struct subchannel *sch)
{
memset(&sch->config, 0, sizeof(sch->config));
sch->config.csense = 1;
/* Use subchannel mp mode when there is more than 1 installed CHPID. */
if ((sch->schib.pmcw.pim & (sch->schib.pmcw.pim - 1)) != 0)
sch->config.mp = 1;
}
static void io_subchannel_init_fields(struct subchannel *sch)
{
if (cio_is_console(sch->schid))
@ -1127,18 +1193,34 @@ static void io_subchannel_init_fields(struct subchannel *sch)
sch->schib.pmcw.dev, sch->schid.ssid,
sch->schid.sch_no, sch->schib.pmcw.pim,
sch->schib.pmcw.pam, sch->schib.pmcw.pom);
/* Initially set up some fields in the pmcw. */
sch->schib.pmcw.ena = 0;
sch->schib.pmcw.csense = 1; /* concurrent sense */
if ((sch->lpm & (sch->lpm - 1)) != 0)
sch->schib.pmcw.mp = 1; /* multipath mode */
/* clean up possible residual cmf stuff */
sch->schib.pmcw.mme = 0;
sch->schib.pmcw.mbfc = 0;
sch->schib.pmcw.mbi = 0;
sch->schib.mba = 0;
io_subchannel_init_config(sch);
}
static void io_subchannel_do_unreg(struct work_struct *work)
{
struct subchannel *sch;
sch = container_of(work, struct subchannel, work);
css_sch_device_unregister(sch);
/* Reset intparm to zeroes. */
sch->config.intparm = 0;
cio_commit_config(sch);
put_device(&sch->dev);
}
/* Schedule unregister if we have no cdev. */
static void io_subchannel_schedule_removal(struct subchannel *sch)
{
get_device(&sch->dev);
INIT_WORK(&sch->work, io_subchannel_do_unreg);
queue_work(slow_path_wq, &sch->work);
}
/*
* Note: We always return 0 so that we bind to the device even on error.
* This is needed so that our remove function is called on unregister.
*/
static int io_subchannel_probe(struct subchannel *sch)
{
struct ccw_device *cdev;
@ -1168,9 +1250,8 @@ static int io_subchannel_probe(struct subchannel *sch)
ccw_device_register(cdev);
/*
* Check if the device is already online. If it is
* the reference count needs to be corrected
* (see ccw_device_online and css_init_done for the
* ugly details).
* the reference count needs to be corrected since we
* didn't obtain a reference in ccw_device_set_online.
*/
if (cdev->private->state != DEV_STATE_NOT_OPER &&
cdev->private->state != DEV_STATE_OFFLINE &&
@ -1179,23 +1260,24 @@ static int io_subchannel_probe(struct subchannel *sch)
return 0;
}
io_subchannel_init_fields(sch);
rc = cio_commit_config(sch);
if (rc)
goto out_schedule;
rc = sysfs_create_group(&sch->dev.kobj,
&io_subchannel_attr_group);
if (rc)
goto out_schedule;
/* Allocate I/O subchannel private data. */
sch->private = kzalloc(sizeof(struct io_subchannel_private),
GFP_KERNEL | GFP_DMA);
if (!sch->private)
goto out_err;
/*
* First check if a fitting device may be found amongst the
* disconnected devices or in the orphanage.
*/
dev_id.devno = sch->schib.pmcw.dev;
dev_id.ssid = sch->schid.ssid;
rc = sysfs_create_group(&sch->dev.kobj,
&io_subchannel_attr_group);
if (rc)
return rc;
/* Allocate I/O subchannel private data. */
sch->private = kzalloc(sizeof(struct io_subchannel_private),
GFP_KERNEL | GFP_DMA);
if (!sch->private) {
rc = -ENOMEM;
goto out_err;
}
cdev = get_disc_ccwdev_by_dev_id(&dev_id, NULL);
if (!cdev)
cdev = get_orphaned_ccwdev_by_dev_id(to_css(sch->dev.parent),
@ -1213,24 +1295,21 @@ static int io_subchannel_probe(struct subchannel *sch)
return 0;
}
cdev = io_subchannel_create_ccwdev(sch);
if (IS_ERR(cdev)) {
rc = PTR_ERR(cdev);
if (IS_ERR(cdev))
goto out_err;
}
rc = io_subchannel_recog(cdev, sch);
if (rc) {
spin_lock_irqsave(sch->lock, flags);
sch_set_cdev(sch, NULL);
io_subchannel_recog_done(cdev);
spin_unlock_irqrestore(sch->lock, flags);
if (cdev->dev.release)
cdev->dev.release(&cdev->dev);
goto out_err;
}
return 0;
out_err:
kfree(sch->private);
sysfs_remove_group(&sch->dev.kobj, &io_subchannel_attr_group);
return rc;
out_schedule:
io_subchannel_schedule_removal(sch);
return 0;
}
static int
@ -1275,10 +1354,7 @@ static void io_subchannel_verify(struct subchannel *sch)
static int check_for_io_on_path(struct subchannel *sch, int mask)
{
int cc;
cc = stsch(sch->schid, &sch->schib);
if (cc)
if (cio_update_schib(sch))
return 0;
if (scsw_actl(&sch->schib.scsw) && sch->schib.pmcw.lpum == mask)
return 1;
@ -1347,15 +1423,13 @@ static int io_subchannel_chp_event(struct subchannel *sch,
io_subchannel_verify(sch);
break;
case CHP_OFFLINE:
if (stsch(sch->schid, &sch->schib))
return -ENXIO;
if (!css_sch_is_valid(&sch->schib))
if (cio_update_schib(sch))
return -ENODEV;
io_subchannel_terminate_path(sch, mask);
break;
case CHP_ONLINE:
if (stsch(sch->schid, &sch->schib))
return -ENXIO;
if (cio_update_schib(sch))
return -ENODEV;
sch->lpm |= mask & sch->opm;
io_subchannel_verify(sch);
break;
@ -1610,8 +1684,8 @@ static int io_subchannel_sch_event(struct subchannel *sch, int slow)
spin_lock_irqsave(sch->lock, flags);
/* Reset intparm to zeroes. */
sch->schib.pmcw.intparm = 0;
cio_modify(sch);
sch->config.intparm = 0;
cio_commit_config(sch);
break;
case REPROBE:
ccw_device_trigger_reprobe(cdev);
@ -1652,6 +1726,9 @@ static int ccw_device_console_enable(struct ccw_device *cdev,
sch->private = cio_get_console_priv();
memset(sch->private, 0, sizeof(struct io_subchannel_private));
io_subchannel_init_fields(sch);
rc = cio_commit_config(sch);
if (rc)
return rc;
sch->driver = &io_subchannel_driver;
/* Initialize the ccw_device structure. */
cdev->dev.parent= &sch->dev;
@ -1723,7 +1800,7 @@ __ccwdev_check_busid(struct device *dev, void *id)
bus_id = id;
return (strncmp(bus_id, dev_name(dev), BUS_ID_SIZE) == 0);
return (strcmp(bus_id, dev_name(dev)) == 0);
}
@ -1806,6 +1883,8 @@ ccw_device_remove (struct device *dev)
"device 0.%x.%04x\n",
ret, cdev->private->dev_id.ssid,
cdev->private->dev_id.devno);
/* Give up reference obtained in ccw_device_set_online(). */
put_device(&cdev->dev);
}
ccw_device_set_timeout(cdev, 0);
cdev->drv = NULL;

1
drivers/s390/cio/device.h
View file

@ -76,6 +76,7 @@ extern wait_queue_head_t ccw_device_init_wq;
extern atomic_t ccw_device_init_count;
void io_subchannel_recog_done(struct ccw_device *cdev);
void io_subchannel_init_config(struct subchannel *sch);
int ccw_device_cancel_halt_clear(struct ccw_device *);

46
drivers/s390/cio/device_fsm.c
View file

@ -140,8 +140,7 @@ ccw_device_cancel_halt_clear(struct ccw_device *cdev)
int ret;
sch = to_subchannel(cdev->dev.parent);
ret = stsch(sch->schid, &sch->schib);
if (ret || !sch->schib.pmcw.dnv)
if (cio_update_schib(sch))
return -ENODEV;
if (!sch->schib.pmcw.ena)
/* Not operational -> done. */
@ -245,11 +244,13 @@ ccw_device_recog_done(struct ccw_device *cdev, int state)
* through ssch() and the path information is up to date.
*/
old_lpm = sch->lpm;
stsch(sch->schid, &sch->schib);
sch->lpm = sch->schib.pmcw.pam & sch->opm;
/* Check since device may again have become not operational. */
if (!sch->schib.pmcw.dnv)
if (cio_update_schib(sch))
state = DEV_STATE_NOT_OPER;
else
sch->lpm = sch->schib.pmcw.pam & sch->opm;
if (cdev->private->state == DEV_STATE_DISCONNECTED_SENSE_ID)
/* Force reprobe on all chpids. */
old_lpm = 0;
@ -399,9 +400,6 @@ ccw_device_done(struct ccw_device *cdev, int state)
ccw_device_oper_notify(cdev);
}
wake_up(&cdev->private->wait_q);
if (css_init_done && state != DEV_STATE_ONLINE)
put_device (&cdev->dev);
}
static int cmp_pgid(struct pgid *p1, struct pgid *p2)
@ -552,7 +550,11 @@ ccw_device_verify_done(struct ccw_device *cdev, int err)
sch = to_subchannel(cdev->dev.parent);
/* Update schib - pom may have changed. */
stsch(sch->schid, &sch->schib);
if (cio_update_schib(sch)) {
cdev->private->flags.donotify = 0;
ccw_device_done(cdev, DEV_STATE_NOT_OPER);
return;
}
/* Update lpm with verified path mask. */
sch->lpm = sch->vpm;
/* Repeat path verification? */
@ -611,8 +613,6 @@ ccw_device_online(struct ccw_device *cdev)
(cdev->private->state != DEV_STATE_BOXED))
return -EINVAL;
sch = to_subchannel(cdev->dev.parent);
if (css_init_done && !get_device(&cdev->dev))
return -ENODEV;
ret = cio_enable_subchannel(sch, (u32)(addr_t)sch);
if (ret != 0) {
/* Couldn't enable the subchannel for i/o. Sick device. */
@ -672,7 +672,7 @@ ccw_device_offline(struct ccw_device *cdev)
return 0;
}
sch = to_subchannel(cdev->dev.parent);
if (stsch(sch->schid, &sch->schib) || !sch->schib.pmcw.dnv)
if (cio_update_schib(sch))
return -ENODEV;
if (scsw_actl(&sch->schib.scsw) != 0)
return -EBUSY;
@ -750,7 +750,10 @@ ccw_device_online_verify(struct ccw_device *cdev, enum dev_event dev_event)
* Since we might not just be coming from an interrupt from the
* subchannel we have to update the schib.
*/
stsch(sch->schid, &sch->schib);
if (cio_update_schib(sch)) {
ccw_device_verify_done(cdev, -ENODEV);
return;
}
if (scsw_actl(&sch->schib.scsw) != 0 ||
(scsw_stctl(&sch->schib.scsw) & SCSW_STCTL_STATUS_PEND) ||
@ -1016,20 +1019,21 @@ void ccw_device_trigger_reprobe(struct ccw_device *cdev)
sch = to_subchannel(cdev->dev.parent);
/* Update some values. */
if (stsch(sch->schid, &sch->schib))
return;
if (!sch->schib.pmcw.dnv)
if (cio_update_schib(sch))
return;
/*
* The pim, pam, pom values may not be accurate, but they are the best
* we have before performing device selection :/
*/
sch->lpm = sch->schib.pmcw.pam & sch->opm;
/* Re-set some bits in the pmcw that were lost. */
sch->schib.pmcw.csense = 1;
sch->schib.pmcw.ena = 0;
if ((sch->lpm & (sch->lpm - 1)) != 0)
sch->schib.pmcw.mp = 1;
/*
* Use the initial configuration since we can't be shure that the old
* paths are valid.
*/
io_subchannel_init_config(sch);
if (cio_commit_config(sch))
return;
/* We should also udate ssd info, but this has to wait. */
/* Check if this is another device which appeared on the same sch. */
if (sch->schib.pmcw.dev != cdev->private->dev_id.devno) {

2
drivers/s390/cio/device_pgid.c
View file

@ -504,7 +504,7 @@ ccw_device_verify_start(struct ccw_device *cdev)
sch->vpm = 0;
/* Get current pam. */
if (stsch(sch->schid, &sch->schib)) {
if (cio_update_schib(sch)) {
ccw_device_verify_done(cdev, -ENODEV);
return;
}

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