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    Subject[PATCH] KVM: x86/pmu: Add '.exclude_hv = 1' for guest perf_event
    Date
    To emulate PMC counter for guest, KVM would create an
    event on the host with 'exclude_guest=0, exclude_hv=0'
    which simply makes no sense and is utterly broken.

    To keep perf semantics consistent, any event created by
    pmc_reprogram_counter() should both set exclude_hv and
    exclude_host in the KVM context.

    Message-ID: <20200811084548.GW3982@worktop.programming.kicks-ass.net>
    Signed-off-by: Like Xu <like.xu@linux.intel.com>
    ---
    arch/x86/kvm/pmu.c | 1 +
    1 file changed, 1 insertion(+)

    diff --git a/arch/x86/kvm/pmu.c b/arch/x86/kvm/pmu.c
    index 67741d2a0308..6a30763a10d7 100644
    --- a/arch/x86/kvm/pmu.c
    +++ b/arch/x86/kvm/pmu.c
    @@ -108,6 +108,7 @@ static void pmc_reprogram_counter(struct kvm_pmc *pmc, u32 type,
    .exclude_host = 1,
    .exclude_user = exclude_user,
    .exclude_kernel = exclude_kernel,
    + .exclude_hv = 1,
    .config = config,
    };

    --
    2.21.3
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