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    Subject[PATCHv2 0/9] KVM in-guest performance monitoring
    Date
    This patchset exposes an emulated version 2 architectural performance
    monitoring unit to KVM guests. The PMU is emulated using perf_events,
    so the host kernel can multiplex host-wide, host-user, and the
    guest on available resources.

    The patches are against next branch on kvm.git.

    If you want to try running perf in a guest you need to apply the patch
    below to qemu-kvm and use -cpu host on qemu command line. But DO NOT
    TRY those patches without applying [1][2] to the host kernel first.
    Don't tell me I didn't warn you!

    [1] https://lkml.org/lkml/2011/10/18/390
    [2] https://lkml.org/lkml/2011/10/23/163

    Changelog:
    v1->v2
    - put index into struct kvm_pmc instead of calculating it
    - use locked version of bitops
    - inject pmi from irq work if vcpu was not in a guest mode during NMI
    - providing stub for perf_get_x86_pmu_capability() for !PERF_EVENTS

    Avi Kivity (6):
    KVM: Expose kvm_lapic_local_deliver()
    KVM: Add generic RDPMC support
    KVM: SVM: Intercept RDPMC
    KVM: VMX: Intercept RDPMC
    KVM: x86 emulator: fix RDPMC privilege check
    KVM: x86 emulator: implement RDPMC (0F 33)

    Gleb Natapov (3):
    KVM: Expose a version 2 architectural PMU to a guests
    perf: expose perf capability to other modules.
    KVM: Expose the architectural performance monitoring CPUID leaf

    arch/x86/include/asm/kvm_emulate.h | 1 +
    arch/x86/include/asm/kvm_host.h | 49 +++
    arch/x86/include/asm/perf_event.h | 15 +
    arch/x86/kernel/cpu/perf_event.c | 11 +
    arch/x86/kernel/cpu/perf_event.h | 2 +
    arch/x86/kernel/cpu/perf_event_intel.c | 3 +
    arch/x86/kvm/Kconfig | 1 +
    arch/x86/kvm/Makefile | 2 +-
    arch/x86/kvm/emulate.c | 13 +-
    arch/x86/kvm/lapic.c | 2 +-
    arch/x86/kvm/lapic.h | 1 +
    arch/x86/kvm/pmu.c | 529 ++++++++++++++++++++++++++++++++
    arch/x86/kvm/svm.c | 15 +
    arch/x86/kvm/vmx.c | 15 +-
    arch/x86/kvm/x86.c | 69 ++++-
    include/linux/kvm_host.h | 2 +
    16 files changed, 716 insertions(+), 14 deletions(-)
    create mode 100644 arch/x86/kvm/pmu.c


    diff --git a/roms/seabios b/roms/seabios
    index 8e30147..e0f87ce 160000
    --- a/roms/seabios
    +++ b/roms/seabios
    @@ -1 +1 @@
    -Subproject commit 8e301472e324b6d6496d8b4ffc66863e99d7a505
    +Subproject commit e0f87ce6610a0f341ff79c2c40ddc29f26932353-dirty
    diff --git a/roms/vgabios b/roms/vgabios
    index ca056d8..19ea12c 160000
    --- a/roms/vgabios
    +++ b/roms/vgabios
    @@ -1 +1 @@
    -Subproject commit ca056d8e77a534f4f90548bc8cee166a378c1454
    +Subproject commit 19ea12c230ded95928ecaef0db47a82231c2e485-dirty
    diff --git a/target-i386/cpuid.c b/target-i386/cpuid.c
    index f179999..ff2a0ca 100644
    --- a/target-i386/cpuid.c
    +++ b/target-i386/cpuid.c
    @@ -1178,11 +1178,20 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
    *edx = 0;
    break;
    case 0xA:
    - /* Architectural Performance Monitoring Leaf */
    - *eax = 0;
    - *ebx = 0;
    - *ecx = 0;
    - *edx = 0;
    + if (kvm_enabled()) {
    + KVMState *s = env->kvm_state;
    +
    + *eax = kvm_arch_get_supported_cpuid(s, 0xA, count, R_EAX);
    + *ebx = kvm_arch_get_supported_cpuid(s, 0xA, count, R_EBX);
    + *ecx = kvm_arch_get_supported_cpuid(s, 0xA, count, R_ECX);
    + *edx = kvm_arch_get_supported_cpuid(s, 0xA, count, R_EDX);
    + } else {
    + /* Architectural Performance Monitoring Leaf */
    + *eax = 0; //0x07280402;
    + *ebx = 0;
    + *ecx = 0;
    + *edx = 0; //0x00000503;
    + }
    break;
    case 0xD:
    /* Processor Extended State */
    --
    1.7.5.3


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