From 24fd78a81f6d3fe7f7a440c8629f9c52cd5f830e Mon Sep 17 00:00:00 2001 From: Aravind Gopalakrishnan Date: Wed, 6 May 2015 06:58:56 -0500 Subject: x86/mce/amd: Introduce deferred error interrupt handler Deferred errors indicate error conditions that were not corrected, but require no action from S/W (or action is optional).These errors provide info about a latent UC MCE that can occur when a poisoned data is consumed by the processor. Processors that report these errors can be configured to generate APIC interrupts to notify OS about the error. Provide an interrupt handler in this patch so that OS can catch these errors as and when they happen. Currently, we simply log the errors and exit the handler as S/W action is not mandated. Signed-off-by: Aravind Gopalakrishnan Cc: Tony Luck Cc: x86-ml Cc: linux-edac Link: http://lkml.kernel.org/r/1430913538-1415-5-git-send-email-Aravind.Gopalakrishnan@amd.com Signed-off-by: Borislav Petkov --- arch/x86/kernel/traps.c | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'arch/x86/kernel/traps.c') diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index 324ab5247687..68b1d5979a46 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -827,6 +827,11 @@ asmlinkage __visible void __attribute__((weak)) smp_threshold_interrupt(void) { } +asmlinkage __visible void __attribute__((weak)) +smp_deferred_error_interrupt(void) +{ +} + /* * 'math_state_restore()' saves the current math information in the * old math state array, and gets the new ones from the current task -- cgit v1.2.3 From 8cd161b1f755decd8b7f6c9c7144119281fe11a4 Mon Sep 17 00:00:00 2001 From: Borislav Petkov Date: Thu, 7 May 2015 11:38:08 +0200 Subject: x86/traps: Remove superfluous weak definitions and dead code Those were leftovers of the x86 merge, see 081f75bbdc86 ("traps: x86: make traps_32.c and traps_64.c equal") for example and are not needed now. Signed-off-by: Borislav Petkov --- arch/x86/kernel/traps.c | 17 ----------------- 1 file changed, 17 deletions(-) (limited to 'arch/x86/kernel/traps.c') diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index 68b1d5979a46..2768bb663f94 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -813,23 +813,6 @@ dotraplinkage void do_spurious_interrupt_bug(struct pt_regs *regs, long error_code) { conditional_sti(regs); -#if 0 - /* No need to warn about this any longer. */ - pr_info("Ignoring P6 Local APIC Spurious Interrupt Bug...\n"); -#endif -} - -asmlinkage __visible void __attribute__((weak)) smp_thermal_interrupt(void) -{ -} - -asmlinkage __visible void __attribute__((weak)) smp_threshold_interrupt(void) -{ -} - -asmlinkage __visible void __attribute__((weak)) -smp_deferred_error_interrupt(void) -{ } /* -- cgit v1.2.3