diff options
| author | Peter Oberparleiter <peter.oberparleiter@de.ibm.com> | 2006-06-29 15:08:25 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2006-06-29 15:08:25 +0200 |
| commit | 585c3047a881d0f54b93a0dd8ab499b07ed25d09 (patch) | |
| tree | 927b2b4abeb7c9706a958de9917797f2dbbf5445 /arch | |
| parent | 405455734e1cdec09c37233216f9240cb1a058e5 (diff) | |
| download | linux-585c3047a881d0f54b93a0dd8ab499b07ed25d09.tar.bz2 | |
[S390] Add vmpanic parameter.
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/kernel/setup.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 813444aac7d7..2b2551e3510b 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -37,6 +37,7 @@ #include <linux/seq_file.h> #include <linux/kernel_stat.h> #include <linux/device.h> +#include <linux/notifier.h> #include <asm/uaccess.h> #include <asm/system.h> @@ -115,6 +116,7 @@ void __devinit cpu_init (void) */ char vmhalt_cmd[128] = ""; char vmpoff_cmd[128] = ""; +char vmpanic_cmd[128] = ""; 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); +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. */ |