Hi, This is a successor to a previous patch set from Jason Baron. Let's convert kvm_pmu_ops to use static_call. Shows good performance gains for a typical perf use case [2] in the guest (results in patch 3/3). V1 -> V2 Changelog: - Export kvm_pmu_is_valid_msr() for nVMX [Sean] - Land memcpy() above kvm_ops_static_call_update() [Sean] - Move the pmu_ops to kvm_x86_init_ops and tagged as __initdata. [Sean] - Move the kvm_ops_static_call_update() to x86.c [Sean] - Drop kvm_pmu_ops_static_call_update() [Sean] - Fix WARNING that macros KVM_X86_OP should not use a trailing semicolon Previous: https://lore.kernel.org/kvm/20211103070310.43380-1-likexu@xxxxxxxxxxx/ [1] https://lore.kernel.org/lkml/cover.1610680941.git.jbaron@xxxxxxxxxx/ [2] perf record -e branch-instructions -e branch-misses \ -e cache-misses -e cache-references -e cpu-cycles \ -e instructions ./workload Thanks, Like Xu (7): KVM: x86: Export kvm_pmu_is_valid_msr() for nVMX KVM: x86: Fix WARNING that macros should not use a trailing semicolon KVM: x86: Move kvm_ops_static_call_update() to x86.c KVM: x86: Copy kvm_pmu_ops by value to eliminate layer of indirection KVM: x86: Move .pmu_ops to kvm_x86_init_ops and tagged as __initdata KVM: x86: Introduce definitions to support static calls for kvm_pmu_ops KVM: x86: Use static calls to reduce kvm_pmu_ops overhead arch/x86/include/asm/kvm-x86-ops.h | 218 ++++++++++++------------- arch/x86/include/asm/kvm-x86-pmu-ops.h | 32 ++++ arch/x86/include/asm/kvm_host.h | 14 +- arch/x86/kvm/pmu.c | 46 +++--- arch/x86/kvm/pmu.h | 9 +- arch/x86/kvm/svm/pmu.c | 2 +- arch/x86/kvm/svm/svm.c | 2 +- arch/x86/kvm/vmx/nested.c | 2 +- arch/x86/kvm/vmx/pmu_intel.c | 2 +- arch/x86/kvm/vmx/vmx.c | 2 +- arch/x86/kvm/x86.c | 16 +- 11 files changed, 199 insertions(+), 146 deletions(-) create mode 100644 arch/x86/include/asm/kvm-x86-pmu-ops.h -- 2.33.0
