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    Subject[PATCH 4.19 55/56] KVM: LAPIC: Prevent setting the tscdeadline timer if the lapic is hw disabled
    Date
    From: Wanpeng Li <wanpengli@tencent.com>

    commit d2286ba7d574ba3103a421a2f9ec17cb5b0d87a1 upstream.

    Prevent setting the tscdeadline timer if the lapic is hw disabled.

    Fixes: bce87cce88 (KVM: x86: consolidate different ways to test for in-kernel LAPIC)
    Cc: <stable@vger.kernel.org>
    Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
    Message-Id: <1596165141-28874-1-git-send-email-wanpengli@tencent.com>
    Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/x86/kvm/lapic.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    --- a/arch/x86/kvm/lapic.c
    +++ b/arch/x86/kvm/lapic.c
    @@ -2034,7 +2034,7 @@ void kvm_set_lapic_tscdeadline_msr(struc
    {
    struct kvm_lapic *apic = vcpu->arch.apic;

    - if (!lapic_in_kernel(vcpu) || apic_lvtt_oneshot(apic) ||
    + if (!kvm_apic_present(vcpu) || apic_lvtt_oneshot(apic) ||
    apic_lvtt_period(apic))
    return;


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