KVM: x86/pmu: Rewrite reprogram_counters() to improve performance

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A valid pmc is always tested before using pmu->reprogram_pmi. Eliminate
this part of the redundancy by setting the counter's bitmask directly,
and in addition, trigger KVM_REQ_PMU only once to save more cpu cycles.

Signed-off-by: Like Xu <likexu@tencent.com>
Link: https://lore.kernel.org/r/20230214050757.9623-4-likexu@tencent.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Like Xu 2023-02-14 13:07:48 +08:00 • committed by Sean Christopherson

parent 8bca8c5ce4

commit 649bccd7fa

1 changed files with 6 additions and 6 deletions

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arch/x86/kvm/vmx/pmu_intel.c

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