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    Subject[PATCH 32/43] KVM: x86: Ignore reads to EVNTSEL MSRs
    Date
    From: Amit Shah <amit.shah@redhat.com>

    We ignore writes to the performance counters and performance event
    selector registers already. Kaspersky antivirus reads the eventsel
    MSR causing it to crash with the current behaviour.

    Return 0 as data when the eventsel registers are read to stop the
    crash.

    Signed-off-by: Amit Shah <amit.shah@redhat.com>
    Signed-off-by: Avi Kivity <avi@redhat.com>
    ---
    arch/x86/kvm/x86.c | 2 ++
    1 files changed, 2 insertions(+), 0 deletions(-)

    diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
    index a27a64c..0131b5f 100644
    --- a/arch/x86/kvm/x86.c
    +++ b/arch/x86/kvm/x86.c
    @@ -891,6 +891,8 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
    case MSR_IA32_LASTINTFROMIP:
    case MSR_IA32_LASTINTTOIP:
    case MSR_VM_HSAVE_PA:
    + case MSR_P6_EVNTSEL0:
    + case MSR_P6_EVNTSEL1:
    data = 0;
    break;
    case MSR_MTRRcap:
    --
    1.6.0.6


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