From: Peter Oberparleiter <[email protected]>
[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 <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
---
Documentation/kernel-parameters.txt | 9 +++++++--
arch/s390/kernel/setup.c | 34 ++++++++++++++++++++++++++++++++++
2 files changed, 41 insertions(+), 2 deletions(-)
diff -urpN linux-2.6/arch/s390/kernel/setup.c linux-2.6-patched/arch/s390/kernel/setup.c
--- linux-2.6/arch/s390/kernel/setup.c 2006-06-14 14:29:44.000000000 +0200
+++ linux-2.6-patched/arch/s390/kernel/setup.c 2006-06-14 14:29:58.000000000 +0200
@@ -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>
@@ -123,6 +124,7 @@ 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)
{
@@ -154,6 +156,38 @@ 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.
*/
diff -urpN linux-2.6/Documentation/kernel-parameters.txt linux-2.6-patched/Documentation/kernel-parameters.txt
--- linux-2.6/Documentation/kernel-parameters.txt 2006-06-14 14:29:11.000000000 +0200
+++ linux-2.6-patched/Documentation/kernel-parameters.txt 2006-06-14 14:29:58.000000000 +0200
@@ -1662,9 +1662,14 @@ running once the system is up.
decrease the size and leave more room for directly
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]
Format: <io>,<irq>,<dma>,<dma2>
-
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