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

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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: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/all/1677523568-50263-1-git-send-email-mikelley%40microsoft.com
This commit is contained in:
Michael Kelley 2023-02-27 10:46:08 -08:00 committed by Dave Hansen
parent 9561de3a55
commit 504dba50b0
1 changed files with 7 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

7
arch/x86/kernel/irq.c
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@ -211,6 +211,13 @@ u64 arch_irq_stat_cpu(unsigned int cpu)
#ifdef CONFIG_X86_MCE_THRESHOLD #ifdef CONFIG_X86_MCE_THRESHOLD
sum += irq_stats(cpu)->irq_threshold_count; sum += irq_stats(cpu)->irq_threshold_count;
#endif #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 #ifdef CONFIG_X86_MCE
sum += per_cpu(mce_exception_count, cpu); sum += per_cpu(mce_exception_count, cpu);
sum += per_cpu(mce_poll_count, cpu); sum += per_cpu(mce_poll_count, cpu);