Commit 8a1038de authored by Wanpeng Li's avatar Wanpeng Li Committed by Paolo Bonzini
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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: default avatarWanpeng Li <wanpengli@tencent.com>
Message-Id: <1585189202-1708-2-git-send-email-wanpengli@tencent.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 4f6ea0a8

arch/x86/kvm/x86.c

+2 −1
Original line number Diff line number Diff line
@@ -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: