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authorPeter Oberparleiter <peter.oberparleiter@de.ibm.com>2006-06-29 15:08:25 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2006-06-29 15:08:25 +0200
commit585c3047a881d0f54b93a0dd8ab499b07ed25d09 (patch)
tree927b2b4abeb7c9706a958de9917797f2dbbf5445 /arch/s390
parent405455734e1cdec09c37233216f9240cb1a058e5 (diff)
[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/s390')
-rw-r--r--arch/s390/kernel/setup.c34
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.
*/