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Commit 24fd78a8 authored by Aravind Gopalakrishnan's avatar Aravind Gopalakrishnan Committed by Borislav Petkov
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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: default avatarAravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: x86-ml <x86@kernel.org>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/1430913538-1415-5-git-send-email-Aravind.Gopalakrishnan@amd.com


Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
parent 7559e13f

arch/x86/include/asm/entry_arch.h

+3 −0
Original line number Diff line number Diff line
@@ -50,4 +50,7 @@ BUILD_INTERRUPT(thermal_interrupt,THERMAL_APIC_VECTOR) 
BUILD_INTERRUPT(threshold_interrupt,THRESHOLD_APIC_VECTOR)

#endif



#ifdef CONFIG_X86_MCE_AMD

BUILD_INTERRUPT(deferred_error_interrupt, DEFERRED_ERROR_VECTOR)

#endif

#endif

arch/x86/include/asm/hardirq.h

+3 −0
Original line number Diff line number Diff line
@@ -33,6 +33,9 @@ typedef struct { 
#ifdef CONFIG_X86_MCE_THRESHOLD

	unsigned int irq_threshold_count;

#endif

#ifdef CONFIG_X86_MCE_AMD

	unsigned int irq_deferred_error_count;

#endif

#if IS_ENABLED(CONFIG_HYPERV) || defined(CONFIG_XEN)

	unsigned int irq_hv_callback_count;

#endif

arch/x86/include/asm/hw_irq.h

+2 −0
Original line number Diff line number Diff line
@@ -73,6 +73,7 @@ extern asmlinkage void invalidate_interrupt31(void); 
extern asmlinkage void irq_move_cleanup_interrupt(void);

extern asmlinkage void reboot_interrupt(void);

extern asmlinkage void threshold_interrupt(void);

extern asmlinkage void deferred_error_interrupt(void);



extern asmlinkage void call_function_interrupt(void);

extern asmlinkage void call_function_single_interrupt(void);
@@ -87,6 +88,7 @@ extern void trace_spurious_interrupt(void); 
extern void trace_thermal_interrupt(void);

extern void trace_reschedule_interrupt(void);

extern void trace_threshold_interrupt(void);

extern void trace_deferred_error_interrupt(void);

extern void trace_call_function_interrupt(void);

extern void trace_call_function_single_interrupt(void);

#define trace_irq_move_cleanup_interrupt  irq_move_cleanup_interrupt

arch/x86/include/asm/irq_vectors.h

+1 −0
Original line number Diff line number Diff line
@@ -113,6 +113,7 @@ 
#define IRQ_WORK_VECTOR			0xf6



#define UV_BAU_MESSAGE			0xf5

#define DEFERRED_ERROR_VECTOR		0xf4



/* Vector on which hypervisor callbacks will be delivered */

#define HYPERVISOR_CALLBACK_VECTOR	0xf3

arch/x86/include/asm/mce.h

+3 −0
Original line number Diff line number Diff line
@@ -234,6 +234,9 @@ void do_machine_check(struct pt_regs *, long); 
extern void (*mce_threshold_vector)(void);

extern void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu);



/* Deferred error interrupt handler */

extern void (*deferred_error_int_vector)(void);



/*

 * Thermal handler

 */