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| author |   Wanpeng Li <wanpengli@tencent.com> | 2020-03-26 10:20:00 +0800 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2020-03-26 05:58:25 -0400 |
| commit | 8a1038de11a5536c76054061837b11648bec5b46 (patch) | |
| tree | 98388ff91f09dd875d7e38b7b44fb103b72b358a | |
| parent | KVM: VMX: Gracefully handle faults on VMXON (diff) | |
| download | wireguard-linux-8a1038de11a5536c76054061837b11648bec5b46.tar.xz wireguard-linux-8a1038de11a5536c76054061837b11648bec5b46.zip | |
KVM: X86: Delay read msr data iff writes ICR MSR
Delay read msr data until we identify guest accesses ICR MSR to avoid
to penalize all other MSR writes.
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1585189202-1708-2-git-send-email-wanpengli@tencent.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/x86.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index a4e62d767dd6..62d614586402 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1595,11 +1595,12 @@ static int handle_fastpath_set_x2apic_icr_irqoff(struct kvm_vcpu *vcpu, u64 data enum exit_fastpath_completion handle_fastpath_set_msr_irqoff(struct kvm_vcpu *vcpu) { u32 msr = kvm_rcx_read(vcpu); - u64 data = kvm_read_edx_eax(vcpu); + u64 data; int ret = 0; switch (msr) { case APIC_BASE_MSR + (APIC_ICR >> 4): + data = kvm_read_edx_eax(vcpu); ret = handle_fastpath_set_x2apic_icr_irqoff(vcpu, data); break; default: |