Il 03/10/2014 00:10, Nadav Amit ha scritto:
> To solve this situation, ignore host initiated TSC deadline writes that do not
> change the deadline value.
>
> Signed-off-by: Nadav Amit <namit@xxxxxxxxxxxxxxxxx>
> ---
> arch/x86/kvm/lapic.c | 7 ++++++-
> arch/x86/kvm/lapic.h | 3 ++-
> arch/x86/kvm/x86.c | 2 +-
> 3 files changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
> index b8345dd..0bcf2e1 100644
> --- a/arch/x86/kvm/lapic.c
> +++ b/arch/x86/kvm/lapic.c
> @@ -1346,14 +1346,19 @@ u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu)
> return apic->lapic_timer.tscdeadline;
> }
>
> -void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data)
> +void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu,
> + struct msr_data *msr_info)
> {
> struct kvm_lapic *apic = vcpu->arch.apic;
> + u64 data = msr_info->data;
>
> if (!kvm_vcpu_has_lapic(vcpu) || apic_lvtt_oneshot(apic) ||
> apic_lvtt_period(apic))
> return;
>
> + if (msr_info->host_initiated && apic->lapic_timer.tscdeadline == data)
> + return;
> +
Why do we have to check host_initiated?
Paolo
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