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| author |   Wanpeng Li <wanpengli@tencent.com> | 2021-06-09 00:16:40 -0700 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2021-06-17 14:26:11 -0400 |
| commit | 2735886c9ef115fc7b40d27bfe73605c38e9d56b (patch) | |
| tree | 99dd8cd73bfd3b5d86f8f91a395a33ea2f2b6b56 /arch/x86/kvm/lapic.c | |
| parent | KVM: X86: Introduce KVM_HC_MAP_GPA_RANGE hypercall (diff) | |
| download | linux-dev-2735886c9ef115fc7b40d27bfe73605c38e9d56b.tar.xz linux-dev-2735886c9ef115fc7b40d27bfe73605c38e9d56b.zip | |
KVM: LAPIC: Keep stored TMCCT register value 0 after KVM_SET_LAPIC
KVM_GET_LAPIC stores the current value of TMCCT and KVM_SET_LAPIC's memcpy
stores it in vcpu->arch.apic->regs, KVM_SET_LAPIC could store zero in
vcpu->arch.apic->regs after it uses it, and then the stored value would
always be zero. In addition, the TMCCT is always computed on-demand and
never directly readable.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1623223000-18116-1-git-send-email-wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/lapic.c')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index 4b80e613096b..ba5a27879f1d 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -2631,6 +2631,7 @@ int kvm_apic_set_state(struct kvm_vcpu *vcpu, struct kvm_lapic_state *s) apic_manage_nmi_watchdog(apic, kvm_lapic_get_reg(apic, APIC_LVT0)); update_divide_count(apic); __start_apic_timer(apic, APIC_TMCCT); + kvm_lapic_set_reg(apic, APIC_TMCCT, 0); kvm_apic_update_apicv(vcpu); apic->highest_isr_cache = -1; if (vcpu->arch.apicv_active) { |