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[S390] Add vmpanic parameter.

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Implementation of new kernel parameter vmpanic that provides a means to
perform a z/VM CP command after a kernel panic occurred.

Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Peter Oberparleiter 2006-06-29 15:08:25 +02:00 committed by Martin Schwidefsky
parent 405455734e
commit 585c3047a8
2 changed files with 41 additions and 2 deletions
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9
Documentation/kernel-parameters.txt
View file

@ -1689,9 +1689,14 @@ running once the system is up.
decrease the size and leave more room for directly decrease the size and leave more room for directly
mapped kernel RAM. mapped kernel RAM.
vmhalt= [KNL,S390] vmhalt= [KNL,S390] Perform z/VM CP command after system halt.
Format: <command>
vmpoff= [KNL,S390] vmpanic= [KNL,S390] Perform z/VM CP command after kernel panic.
Format: <command>
vmpoff= [KNL,S390] Perform z/VM CP command after power off.
Format: <command>
waveartist= [HW,OSS] waveartist= [HW,OSS]
Format: <io>,<irq>,<dma>,<dma2> Format: <io>,<irq>,<dma>,<dma2>

34
arch/s390/kernel/setup.c
View file

@ -37,6 +37,7 @@
#include <linux/seq_file.h> #include <linux/seq_file.h>
#include <linux/kernel_stat.h> #include <linux/kernel_stat.h>
#include <linux/device.h> #include <linux/device.h>
#include <linux/notifier.h>
#include <asm/uaccess.h> #include <asm/uaccess.h>
#include <asm/system.h> #include <asm/system.h>
@ -115,6 +116,7 @@ void __devinit cpu_init (void)
*/ */
char vmhalt_cmd[128] = ""; char vmhalt_cmd[128] = "";
char vmpoff_cmd[128] = ""; char vmpoff_cmd[128] = "";
char vmpanic_cmd[128] = "";
static inline void strncpy_skip_quote(char *dst, char *src, int n) static inline void strncpy_skip_quote(char *dst, char *src, int n)
{ {
@ -146,6 +148,38 @@ static int __init vmpoff_setup(char *str)
__setup("vmpoff=", vmpoff_setup); __setup("vmpoff=", vmpoff_setup);
static int vmpanic_notify(struct notifier_block *self, unsigned long event,
void *data)
{
if (MACHINE_IS_VM && strlen(vmpanic_cmd) > 0)
cpcmd(vmpanic_cmd, NULL, 0, NULL);
return NOTIFY_OK;
}
#define PANIC_PRI_VMPANIC 0
static struct notifier_block vmpanic_nb = {
.notifier_call = vmpanic_notify,
.priority = PANIC_PRI_VMPANIC
};
static int __init vmpanic_setup(char *str)
{
static int register_done __initdata = 0;
strncpy_skip_quote(vmpanic_cmd, str, 127);
vmpanic_cmd[127] = 0;
if (!register_done) {
register_done = 1;
atomic_notifier_chain_register(&panic_notifier_list,
&vmpanic_nb);
}
return 1;
}
__setup("vmpanic=", vmpanic_setup);
/* /*
* condev= and conmode= setup parameter. * condev= and conmode= setup parameter.
*/ */