From fac58550e80c307bf17cfa0dd544fca4eff120a5 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Tue, 26 Sep 2006 10:52:27 +0200 Subject: [PATCH] [PATCH] Fix up panic messages for different NMI panics When a unknown NMI happened the panic would claim a NMI watchdog timeout. Also it would check the variable set by nmi_watchdog=panic and panic then. Fix up the panic message to be generic Unconditionally panic on unknown NMI when panic on unknown nmi is enabled. Noticed by Jan Beulich Cc: jbeulich@novell.com Signed-off-by: Andi Kleen --- arch/x86_64/kernel/nmi.c | 5 +++-- arch/x86_64/kernel/traps.c | 7 +++---- include/asm-x86_64/nmi.h | 2 +- 3 files changed, 7 insertions(+), 7 deletions(-) diff --git a/arch/x86_64/kernel/nmi.c b/arch/x86_64/kernel/nmi.c index 5a35975e576..1b76d157452 100644 --- a/arch/x86_64/kernel/nmi.c +++ b/arch/x86_64/kernel/nmi.c @@ -695,7 +695,8 @@ int __kprobes nmi_watchdog_tick(struct pt_regs * regs, unsigned reason) */ local_inc(&__get_cpu_var(alert_counter)); if (local_read(&__get_cpu_var(alert_counter)) == 5*nmi_hz) - die_nmi("NMI Watchdog detected LOCKUP on CPU %d\n", regs); + die_nmi("NMI Watchdog detected LOCKUP on CPU %d\n", regs, + panic_on_timeout); } else { __get_cpu_var(last_irq_sum) = sum; local_set(&__get_cpu_var(alert_counter), 0); @@ -765,7 +766,7 @@ static int unknown_nmi_panic_callback(struct pt_regs *regs, int cpu) char buf[64]; sprintf(buf, "NMI received for unknown reason %02x\n", reason); - die_nmi(buf,regs); + die_nmi(buf, regs, 1); /* Always panic here */ return 0; } diff --git a/arch/x86_64/kernel/traps.c b/arch/x86_64/kernel/traps.c index dae10df6092..96f62a03324 100644 --- a/arch/x86_64/kernel/traps.c +++ b/arch/x86_64/kernel/traps.c @@ -570,7 +570,7 @@ void die(const char * str, struct pt_regs * regs, long err) do_exit(SIGSEGV); } -void __kprobes die_nmi(char *str, struct pt_regs *regs) +void __kprobes die_nmi(char *str, struct pt_regs *regs, int do_panic) { unsigned long flags = oops_begin(); @@ -582,9 +582,8 @@ void __kprobes die_nmi(char *str, struct pt_regs *regs) show_registers(regs); if (kexec_should_crash(current)) crash_kexec(regs); - if (panic_on_timeout || panic_on_oops) - panic("nmi watchdog"); - printk("console shuts up ...\n"); + if (do_panic || panic_on_oops) + panic("Non maskable interrupt"); oops_end(flags); nmi_exit(); local_irq_enable(); diff --git a/include/asm-x86_64/nmi.h b/include/asm-x86_64/nmi.h index 57859649427..cbf2669bca7 100644 --- a/include/asm-x86_64/nmi.h +++ b/include/asm-x86_64/nmi.h @@ -37,7 +37,7 @@ static inline void unset_nmi_pm_callback(struct pm_dev * dev) #endif /* CONFIG_PM */ extern void default_do_nmi(struct pt_regs *); -extern void die_nmi(char *str, struct pt_regs *regs); +extern void die_nmi(char *str, struct pt_regs *regs, int do_panic); #define get_nmi_reason() inb(0x61) -- 2.41.1