Like Xu 1921f3aa92 KVM: x86: Use static calls to reduce kvm_pmu_ops overhead ... Use static calls to improve kvm_pmu_ops performance, following the same pattern and naming scheme used by kvm-x86-ops.h. Here are the worst fenced_rdtsc() cycles numbers for the kvm_pmu_ops functions that is most often called (up to 7 digits of calls) when running a single perf test case in a guest on an ICX 2.70GHz host (mitigations=on): | legacy | static call ------------------------------------------------------------ .pmc_idx_to_pmc | 1304840 | 994872 (+23%) .pmc_is_enabled | 978670 | 1011750 (-3%) .msr_idx_to_pmc | 47828 | 41690 (+12%) .is_valid_msr | 28786 | 30108 (-4%) Signed-off-by: Like Xu <likexu@tencent.com> [sean: Handle static call updates in pmu.c, tweak changelog] Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20220329235054.3534728-5-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2022-04-13 13:37:45 -04:00
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asm	KVM: x86: Use static calls to reduce kvm_pmu_ops overhead	2022-04-13 13:37:45 -04:00
uapi/asm	Merge branch 'kvm-older-features' into HEAD	2022-04-13 13:37:17 -04:00