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-rw-r--r--arch/i386/kernel/traps.c6
-rw-r--r--arch/x86_64/kernel/traps.c6
-rw-r--r--include/linux/kernel.h1
-rw-r--r--include/linux/sysctl.h1
-rw-r--r--kernel/panic.c1
-rw-r--r--kernel/sysctl.c8
6 files changed, 23 insertions, 0 deletions
diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c
index 7db664d0b25c..2f6cb8276480 100644
--- a/arch/i386/kernel/traps.c
+++ b/arch/i386/kernel/traps.c
@@ -635,6 +635,8 @@ static void mem_parity_error(unsigned char reason, struct pt_regs * regs)
"to continue\n");
printk(KERN_EMERG "You probably have a hardware problem with your RAM "
"chips\n");
+ if (panic_on_unrecovered_nmi)
+ panic("NMI: Not continuing");
/* Clear and disable the memory parity error line. */
clear_mem_error(reason);
@@ -670,6 +672,10 @@ static void unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
reason, smp_processor_id());
printk("Dazed and confused, but trying to continue\n");
printk("Do you have a strange power saving mode enabled?\n");
+
+ if (panic_on_unrecovered_nmi)
+ panic("NMI: Not continuing");
+
}
static DEFINE_SPINLOCK(nmi_print_lock);
diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c
index 42bc070fdf11..b18829db2a6a 100644
--- a/arch/x86_64/kernel/traps.c
+++ b/arch/x86_64/kernel/traps.c
@@ -732,6 +732,8 @@ mem_parity_error(unsigned char reason, struct pt_regs * regs)
{
printk("Uhhuh. NMI received. Dazed and confused, but trying to continue\n");
printk("You probably have a hardware problem with your RAM chips\n");
+ if (panic_on_unrecovered_nmi)
+ panic("NMI: Not continuing");
/* Clear and disable the memory parity error line. */
reason = (reason & 0xf) | 4;
@@ -757,6 +759,10 @@ unknown_nmi_error(unsigned char reason, struct pt_regs * regs)
{ printk("Uhhuh. NMI received for unknown reason %02x.\n", reason);
printk("Dazed and confused, but trying to continue\n");
printk("Do you have a strange power saving mode enabled?\n");
+
+ if (panic_on_unrecovered_nmi)
+ panic("NMI: Not continuing");
+
}
/* Runs on IST stack. This code must keep interrupts off all the time.
diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 2b2ae4fdce8b..1ff9609300b4 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -186,6 +186,7 @@ extern void bust_spinlocks(int yes);
extern int oops_in_progress; /* If set, an oops, panic(), BUG() or die() is in progress */
extern int panic_timeout;
extern int panic_on_oops;
+extern int panic_on_unrecovered_nmi;
extern int tainted;
extern const char *print_tainted(void);
extern void add_taint(unsigned);
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index ecb79ba52ae1..432778446ad2 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -151,6 +151,7 @@ enum
KERN_COMPAT_LOG=73, /* int: print compat layer messages */
KERN_MAX_LOCK_DEPTH=74,
KERN_NMI_WATCHDOG=75, /* int: enable/disable nmi watchdog */
+ KERN_PANIC_ON_NMI=76, /* int: whether we will panic on an unrecovered */
};
diff --git a/kernel/panic.c b/kernel/panic.c
index 8010b9b17aca..d2db3e2209e0 100644
--- a/kernel/panic.c
+++ b/kernel/panic.c
@@ -21,6 +21,7 @@
#include <linux/debug_locks.h>
int panic_on_oops;
+int panic_on_unrecovered_nmi;
int tainted;
static int pause_on_oops;
static int pause_on_oops_flag;
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 040de6bd74dd..220e20564124 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -642,6 +642,14 @@ static ctl_table kern_table[] = {
#endif
#if defined(CONFIG_X86)
{
+ .ctl_name = KERN_PANIC_ON_NMI,
+ .procname = "panic_on_unrecovered_nmi",
+ .data = &panic_on_unrecovered_nmi,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
.ctl_name = KERN_BOOTLOADER_TYPE,
.procname = "bootloader_type",
.data = &bootloader_type,