Commit 504dba50 authored by Michael Kelley's avatar Michael Kelley Committed by Dave Hansen
Browse files

x86/irq: Add hardcoded hypervisor interrupts to /proc/stat 



Some hypervisor interrupts (such as for Hyper-V VMbus and Hyper-V timers)
have hardcoded interrupt vectors on x86 and don't have Linux IRQs assigned.
These interrupts are shown in /proc/interrupts, but are not reported in
the first field of the "intr" line in /proc/stat because the x86 version
of arch_irq_stat_cpu() doesn't include them.

Fix this by adding code to arch_irq_stat_cpu() to include these interrupts,
similar to existing interrupts that don't have Linux IRQs.

Use #if IS_ENABLED() because unlike all the other nearby #ifdefs,
CONFIG_HYPERV can be built as a module.

Signed-off-by: default avatarMichael Kelley <mikelley@microsoft.com>
Signed-off-by: default avatarDave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/all/1677523568-50263-1-git-send-email-mikelley%40microsoft.com
parent 9561de3a

arch/x86/kernel/irq.c

+7 −0
Original line number Diff line number Diff line
@@ -211,6 +211,13 @@ u64 arch_irq_stat_cpu(unsigned int cpu) 
#ifdef CONFIG_X86_MCE_THRESHOLD

	sum += irq_stats(cpu)->irq_threshold_count;

#endif

#ifdef CONFIG_X86_HV_CALLBACK_VECTOR

	sum += irq_stats(cpu)->irq_hv_callback_count;

#endif

#if IS_ENABLED(CONFIG_HYPERV)

	sum += irq_stats(cpu)->irq_hv_reenlightenment_count;

	sum += irq_stats(cpu)->hyperv_stimer0_count;

#endif

#ifdef CONFIG_X86_MCE

	sum += per_cpu(mce_exception_count, cpu);

	sum += per_cpu(mce_poll_count, cpu);