0f42ae283c
Machine checks are not really high frequency events. The extra two NOP5s for the disabled tracepoints are noise vs. the heavy lifting which needs to be done in the MCE handler. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/20170828064957.144301907@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
29 lines
693 B
C
29 lines
693 B
C
/*
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* Common corrected MCE threshold handler code:
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*/
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <asm/irq_vectors.h>
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#include <asm/apic.h>
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#include <asm/mce.h>
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#include <asm/trace/irq_vectors.h>
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static void default_threshold_interrupt(void)
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{
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pr_err("Unexpected threshold interrupt at vector %x\n",
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THRESHOLD_APIC_VECTOR);
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}
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void (*mce_threshold_vector)(void) = default_threshold_interrupt;
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asmlinkage __visible void __irq_entry smp_threshold_interrupt(void)
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{
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entering_irq();
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trace_threshold_apic_entry(THRESHOLD_APIC_VECTOR);
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inc_irq_stat(irq_threshold_count);
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mce_threshold_vector();
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trace_threshold_apic_exit(THRESHOLD_APIC_VECTOR);
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exiting_ack_irq();
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}
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