From 15d5f8398311f565682959daaca30e3ca7aea600 Mon Sep 17 00:00:00 2001 From: Dmitriy Zavin Date: Tue, 26 Sep 2006 10:52:42 +0200 Subject: [PATCH] x86: Refactor thermal throttle processing Refactor the event processing (syslog messaging and rate limiting) into separate file therm_throt.c. This allows consistent reporting of CPU thermal throttle events. After ACK'ing the interrupt, if the event is current, the user (p4.c/mce_intel.c) calls therm_throt_process to log (and rate limit) the event. If that function returns 1, the user has the option to log things further (such as to mce_log in x86_64). AK: minor cleanup Signed-off-by: Dmitriy Zavin Signed-off-by: Andi Kleen --- arch/x86_64/kernel/mce.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) (limited to 'arch/x86_64/kernel/mce.c') diff --git a/arch/x86_64/kernel/mce.c b/arch/x86_64/kernel/mce.c index 1a93c3738404..bbea88801d88 100644 --- a/arch/x86_64/kernel/mce.c +++ b/arch/x86_64/kernel/mce.c @@ -274,6 +274,33 @@ void do_machine_check(struct pt_regs * regs, long error_code) atomic_dec(&mce_entry); } +#ifdef CONFIG_X86_MCE_INTEL +/*** + * mce_log_therm_throt_event - Logs the thermal throttling event to mcelog + * @cpu: The CPU on which the event occured. + * @status: Event status information + * + * This function should be called by the thermal interrupt after the + * event has been processed and the decision was made to log the event + * further. + * + * The status parameter will be saved to the 'status' field of 'struct mce' + * and historically has been the register value of the + * MSR_IA32_THERMAL_STATUS (Intel) msr. + */ +void mce_log_therm_throt_event(unsigned int cpu, __u64 status) +{ + struct mce m; + + memset(&m, 0, sizeof(m)); + m.cpu = cpu; + m.bank = MCE_THERMAL_BANK; + m.status = status; + rdtscll(m.tsc); + mce_log(&m); +} +#endif /* CONFIG_X86_MCE_INTEL */ + /* * Periodic polling timer for "silent" machine check errors. */ -- cgit v1.2.1