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| author |   Like Xu <likexu@tencent.com> | 2022-04-11 18:19:44 +0800 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2022-06-08 04:48:16 -0400 |
| commit | 968635abd5f5986f3cb6f15602d365cf1b551c5d (patch) | |
| tree | adef023fd2e68efe0e593c1a55e8f61aad158471 /arch/x86/kvm/pmu.c | |
| parent | KVM: x86/pmu: Disable guest PEBS temporarily in two rare situations (diff) | |
| download | linux-dev-968635abd5f5986f3cb6f15602d365cf1b551c5d.tar.xz linux-dev-968635abd5f5986f3cb6f15602d365cf1b551c5d.zip | |
KVM: x86/pmu: Add kvm_pmu_cap to optimize perf_get_x86_pmu_capability
The information obtained from the interface perf_get_x86_pmu_capability()
doesn't change, so an exported "struct x86_pmu_capability" is introduced
for all guests in the KVM, and it's initialized before hardware_setup().
Signed-off-by: Like Xu <likexu@tencent.com>
Message-Id: <20220411101946.20262-16-likexu@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/pmu.c')
| -rw-r--r-- | arch/x86/kvm/pmu.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c index 6e6898ef0011..a8f0618a5ebe 100644 --- a/arch/x86/kvm/pmu.c +++ b/arch/x86/kvm/pmu.c @@ -24,6 +24,9 @@ /* This is enough to filter the vast majority of currently defined events. */ #define KVM_PMU_EVENT_FILTER_MAX_EVENTS 300 +struct x86_pmu_capability __read_mostly kvm_pmu_cap; +EXPORT_SYMBOL_GPL(kvm_pmu_cap); + /* NOTE: * - Each perf counter is defined as "struct kvm_pmc"; * - There are two types of perf counters: general purpose (gp) and fixed. |