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KVM: nVMX: Read EXIT_QUAL and INTR_INFO only when needed for nested exit

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Read vmcs.EXIT_QUALIFICATION and vmcs.VM_EXIT_INTR_INFO only if the
VM-Exit is being reflected to L1 now that they are no longer passed
directly to the kvm_nested_vmexit tracepoint.

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200923201349.16097-8-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2020-09-23 13:13:49 -07:00 committed by Paolo Bonzini
parent cc167bd7ee
commit 02f1965ff8
1 changed files with 2 additions and 3 deletions
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5
arch/x86/kvm/vmx/nested.c
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@ -5934,9 +5934,6 @@ bool nested_vmx_reflect_vmexit(struct kvm_vcpu *vcpu)
goto reflect_vmexit;
}
exit_intr_info = vmx_get_intr_info(vcpu);
exit_qual = vmx_get_exit_qual(vcpu);
trace_kvm_nested_vmexit(exit_reason, vcpu, KVM_ISA_VMX);
/* If L0 (KVM) wants the exit, it trumps L1's desires. */
@ -5953,12 +5950,14 @@ bool nested_vmx_reflect_vmexit(struct kvm_vcpu *vcpu)
* need to be synthesized by querying the in-kernel LAPIC, but external
* interrupts are never reflected to L1 so it's a non-issue.
*/
exit_intr_info = vmx_get_intr_info(vcpu);
if (is_exception_with_error_code(exit_intr_info)) {
struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
vmcs12->vm_exit_intr_error_code =
vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
}
exit_qual = vmx_get_exit_qual(vcpu);
reflect_vmexit:
nested_vmx_vmexit(vcpu, exit_reason, exit_intr_info, exit_qual);