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Merge branch 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

Browse source 
* 'x86-uv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: UV RTC: Always enable RTC clocksource
  x86: UV RTC: Rename generic_interrupt to x86_platform_ipi
  x86: UV RTC: Clean up error handling
  x86: UV RTC: Add clocksource only boot option
  x86: UV RTC: Fix early expiry handling
This commit is contained in:
Linus Torvalds 2009-12-08 13:38:21 -08:00
commit 4646575daf
9 changed files with 69 additions and 51 deletions
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2
arch/x86/include/asm/entry_arch.h
View file

@ -34,7 +34,7 @@ BUILD_INTERRUPT3(invalidate_interrupt7,INVALIDATE_TLB_VECTOR_START+7,
smp_invalidate_interrupt)
#endif
BUILD_INTERRUPT(generic_interrupt, GENERIC_INTERRUPT_VECTOR)
BUILD_INTERRUPT(x86_platform_ipi, X86_PLATFORM_IPI_VECTOR)
/*
* every pentium local APIC has two 'local interrupts', with a

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

@ -12,7 +12,7 @@ typedef struct {
unsigned int apic_timer_irqs; /* arch dependent */
unsigned int irq_spurious_count;
#endif
unsigned int generic_irqs; /* arch dependent */
unsigned int x86_platform_ipis; /* arch dependent */
unsigned int apic_perf_irqs;
unsigned int apic_pending_irqs;
#ifdef CONFIG_SMP

4
arch/x86/include/asm/hw_irq.h
View file

@ -27,7 +27,7 @@
/* Interrupt handlers registered during init_IRQ */
extern void apic_timer_interrupt(void);
extern void generic_interrupt(void);
extern void x86_platform_ipi(void);
extern void error_interrupt(void);
extern void perf_pending_interrupt(void);
@ -119,7 +119,7 @@ extern void eisa_set_level_irq(unsigned int irq);
/* SMP */
extern void smp_apic_timer_interrupt(struct pt_regs *);
extern void smp_spurious_interrupt(struct pt_regs *);
extern void smp_generic_interrupt(struct pt_regs *);
extern void smp_x86_platform_ipi(struct pt_regs *);
extern void smp_error_interrupt(struct pt_regs *);
#ifdef CONFIG_X86_IO_APIC
extern asmlinkage void smp_irq_move_cleanup_interrupt(void);

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

@ -37,7 +37,7 @@ extern void fixup_irqs(void);
extern void irq_force_complete_move(int);
#endif
extern void (*generic_interrupt_extension)(void);
extern void (*x86_platform_ipi_callback)(void);
extern void native_init_IRQ(void);
extern bool handle_irq(unsigned irq, struct pt_regs *regs);

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

@ -106,7 +106,7 @@
/*
* Generic system vector for platform specific use
*/
#define GENERIC_INTERRUPT_VECTOR 0xed
#define X86_PLATFORM_IPI_VECTOR 0xed
/*
* Performance monitoring pending work vector:

4
arch/x86/kernel/entry_64.S
View file

@ -977,8 +977,8 @@ apicinterrupt UV_BAU_MESSAGE \
#endif
apicinterrupt LOCAL_TIMER_VECTOR \
apic_timer_interrupt smp_apic_timer_interrupt
apicinterrupt GENERIC_INTERRUPT_VECTOR \
generic_interrupt smp_generic_interrupt
apicinterrupt X86_PLATFORM_IPI_VECTOR \
x86_platform_ipi smp_x86_platform_ipi
#ifdef CONFIG_SMP
apicinterrupt INVALIDATE_TLB_VECTOR_START+0 \

20
arch/x86/kernel/irq.c
View file

@ -18,7 +18,7 @@
atomic_t irq_err_count;
/* Function pointer for generic interrupt vector handling */
void (*generic_interrupt_extension)(void) = NULL;
void (*x86_platform_ipi_callback)(void) = NULL;
/*
* 'what should we do if we get a hw irq event on an illegal vector'.
@ -72,10 +72,10 @@ static int show_other_interrupts(struct seq_file *p, int prec)
seq_printf(p, "%10u ", irq_stats(j)->apic_pending_irqs);
seq_printf(p, " Performance pending work\n");
#endif
if (generic_interrupt_extension) {
if (x86_platform_ipi_callback) {
seq_printf(p, "%*s: ", prec, "PLT");
for_each_online_cpu(j)
seq_printf(p, "%10u ", irq_stats(j)->generic_irqs);
seq_printf(p, "%10u ", irq_stats(j)->x86_platform_ipis);
seq_printf(p, " Platform interrupts\n");
}
#ifdef CONFIG_SMP
@ -187,8 +187,8 @@ u64 arch_irq_stat_cpu(unsigned int cpu)
sum += irq_stats(cpu)->apic_perf_irqs;
sum += irq_stats(cpu)->apic_pending_irqs;
#endif
if (generic_interrupt_extension)
sum += irq_stats(cpu)->generic_irqs;
if (x86_platform_ipi_callback)
sum += irq_stats(cpu)->x86_platform_ipis;
#ifdef CONFIG_SMP
sum += irq_stats(cpu)->irq_resched_count;
sum += irq_stats(cpu)->irq_call_count;
@ -251,9 +251,9 @@ unsigned int __irq_entry do_IRQ(struct pt_regs *regs)
}
/*
* Handler for GENERIC_INTERRUPT_VECTOR.
* Handler for X86_PLATFORM_IPI_VECTOR.
*/
void smp_generic_interrupt(struct pt_regs *regs)
void smp_x86_platform_ipi(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
@ -263,10 +263,10 @@ void smp_generic_interrupt(struct pt_regs *regs)
irq_enter();
inc_irq_stat(generic_irqs);
inc_irq_stat(x86_platform_ipis);
if (generic_interrupt_extension)
generic_interrupt_extension();
if (x86_platform_ipi_callback)
x86_platform_ipi_callback();
irq_exit();

4
arch/x86/kernel/irqinit.c
View file

@ -200,8 +200,8 @@ static void __init apic_intr_init(void)
/* self generated IPI for local APIC timer */
alloc_intr_gate(LOCAL_TIMER_VECTOR, apic_timer_interrupt);
/* generic IPI for platform specific use */
alloc_intr_gate(GENERIC_INTERRUPT_VECTOR, generic_interrupt);
/* IPI for X86 platform specific use */
alloc_intr_gate(X86_PLATFORM_IPI_VECTOR, x86_platform_ipi);
/* IPI vectors for APIC spurious and error interrupts */
alloc_intr_gate(SPURIOUS_APIC_VECTOR, spurious_interrupt);

72
arch/x86/kernel/uv_time.c
View file

@ -74,7 +74,7 @@ struct uv_rtc_timer_head {
*/
static struct uv_rtc_timer_head **blade_info __read_mostly;
static int uv_rtc_enable;
static int uv_rtc_evt_enable;
/*
* Hardware interface routines
@ -90,7 +90,7 @@ static void uv_rtc_send_IPI(int cpu)
pnode = uv_apicid_to_pnode(apicid);
val = (1UL << UVH_IPI_INT_SEND_SHFT) |
(apicid << UVH_IPI_INT_APIC_ID_SHFT) |
(GENERIC_INTERRUPT_VECTOR << UVH_IPI_INT_VECTOR_SHFT);
(X86_PLATFORM_IPI_VECTOR << UVH_IPI_INT_VECTOR_SHFT);
uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
}
@ -115,7 +115,7 @@ static int uv_setup_intr(int cpu, u64 expires)
uv_write_global_mmr64(pnode, UVH_EVENT_OCCURRED0_ALIAS,
UVH_EVENT_OCCURRED0_RTC1_MASK);
val = (GENERIC_INTERRUPT_VECTOR << UVH_RTC1_INT_CONFIG_VECTOR_SHFT) |
val = (X86_PLATFORM_IPI_VECTOR << UVH_RTC1_INT_CONFIG_VECTOR_SHFT) |
((u64)cpu_physical_id(cpu) << UVH_RTC1_INT_CONFIG_APIC_ID_SHFT);
/* Set configuration */
@ -123,7 +123,10 @@ static int uv_setup_intr(int cpu, u64 expires)
/* Initialize comparator value */
uv_write_global_mmr64(pnode, UVH_INT_CMPB, expires);
return (expires < uv_read_rtc(NULL) && !uv_intr_pending(pnode));
if (uv_read_rtc(NULL) <= expires)
return 0;
return !uv_intr_pending(pnode);
}
/*
@ -223,6 +226,7 @@ static int uv_rtc_set_timer(int cpu, u64 expires)
next_cpu = head->next_cpu;
*t = expires;
/* Will this one be next to go off? */
if (next_cpu < 0 || bcpu == next_cpu ||
expires < head->cpu[next_cpu].expires) {
@ -231,7 +235,7 @@ static int uv_rtc_set_timer(int cpu, u64 expires)
*t = ULLONG_MAX;
uv_rtc_find_next_timer(head, pnode);
spin_unlock_irqrestore(&head->lock, flags);
return 1;
return -ETIME;
}
}
@ -244,7 +248,7 @@ static int uv_rtc_set_timer(int cpu, u64 expires)
*
* Returns 1 if this timer was pending.
*/
static int uv_rtc_unset_timer(int cpu)
static int uv_rtc_unset_timer(int cpu, int force)
{
int pnode = uv_cpu_to_pnode(cpu);
int bid = uv_cpu_to_blade_id(cpu);
@ -256,14 +260,15 @@ static int uv_rtc_unset_timer(int cpu)
spin_lock_irqsave(&head->lock, flags);
if (head->next_cpu == bcpu && uv_read_rtc(NULL) >= *t)
if ((head->next_cpu == bcpu && uv_read_rtc(NULL) >= *t) || force)
rc = 1;
if (rc) {
*t = ULLONG_MAX;
/* Was the hardware setup for this timer? */
if (head->next_cpu == bcpu)
uv_rtc_find_next_timer(head, pnode);
}
spin_unlock_irqrestore(&head->lock, flags);
@ -310,32 +315,32 @@ static void uv_rtc_timer_setup(enum clock_event_mode mode,
break;
case CLOCK_EVT_MODE_UNUSED:
case CLOCK_EVT_MODE_SHUTDOWN:
uv_rtc_unset_timer(ced_cpu);
uv_rtc_unset_timer(ced_cpu, 1);
break;
}
}
static void uv_rtc_interrupt(void)
{
struct clock_event_device *ced = &__get_cpu_var(cpu_ced);
int cpu = smp_processor_id();
struct clock_event_device *ced = &per_cpu(cpu_ced, cpu);
if (!ced || !ced->event_handler)
return;
if (uv_rtc_unset_timer(cpu) != 1)
if (uv_rtc_unset_timer(cpu, 0) != 1)
return;
ced->event_handler(ced);
}
static int __init uv_enable_rtc(char *str)
static int __init uv_enable_evt_rtc(char *str)
{
uv_rtc_enable = 1;
uv_rtc_evt_enable = 1;
return 1;
}
__setup("uvrtc", uv_enable_rtc);
__setup("uvrtcevt", uv_enable_evt_rtc);
static __init void uv_rtc_register_clockevents(struct work_struct *dummy)
{
@ -350,27 +355,32 @@ static __init int uv_rtc_setup_clock(void)
{
int rc;
if (!uv_rtc_enable || !is_uv_system() || generic_interrupt_extension)
if (!is_uv_system())
return -ENODEV;
generic_interrupt_extension = uv_rtc_interrupt;
clocksource_uv.mult = clocksource_hz2mult(sn_rtc_cycles_per_second,
clocksource_uv.shift);
/* If single blade, prefer tsc */
if (uv_num_possible_blades() == 1)
clocksource_uv.rating = 250;
rc = clocksource_register(&clocksource_uv);
if (rc) {
generic_interrupt_extension = NULL;
if (rc)
printk(KERN_INFO "UV RTC clocksource failed rc %d\n", rc);
else
printk(KERN_INFO "UV RTC clocksource registered freq %lu MHz\n",
sn_rtc_cycles_per_second/(unsigned long)1E6);
if (rc || !uv_rtc_evt_enable || x86_platform_ipi_callback)
return rc;
}
/* Setup and register clockevents */
rc = uv_rtc_allocate_timers();
if (rc) {
clocksource_unregister(&clocksource_uv);
generic_interrupt_extension = NULL;
return rc;
}
if (rc)
goto error;
x86_platform_ipi_callback = uv_rtc_interrupt;
clock_event_device_uv.mult = div_sc(sn_rtc_cycles_per_second,
NSEC_PER_SEC, clock_event_device_uv.shift);
@ -383,11 +393,19 @@ static __init int uv_rtc_setup_clock(void)
rc = schedule_on_each_cpu(uv_rtc_register_clockevents);
if (rc) {
clocksource_unregister(&clocksource_uv);
generic_interrupt_extension = NULL;
x86_platform_ipi_callback = NULL;
uv_rtc_deallocate_timers();
goto error;
}
printk(KERN_INFO "UV RTC clockevents registered\n");
return 0;
error:
clocksource_unregister(&clocksource_uv);
printk(KERN_INFO "UV RTC clockevents failed rc %d\n", rc);
return rc;
}
arch_initcall(uv_rtc_setup_clock);