KVM: VMX: Restore host's MSR_IA32_RTIT_CTL when it's not zero

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A minor optimization to WRMSR MSR_IA32_RTIT_CTL when necessary.

Opportunistically refine the comment to call out that KVM requires
VM_EXIT_CLEAR_IA32_RTIT_CTL to expose PT to the guest.

Reviewed-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Message-Id: <20210827070249.924633-2-xiaoyao.li@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Xiaoyao Li 2021-08-27 15:02:43 +08:00 • committed by Paolo Bonzini

parent 2839180ce5

commit 2e6e0d683b

1 changed files with 6 additions and 2 deletions

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arch/x86/kvm/vmx/vmx.c

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