linux-kernel - [PATCH v3 1/2] KVM: nVMX: Drop a redundant call to vmx_get_intr

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Date:   Tue, 21 Apr 2020 00:53:27 -0700
From:   Sean Christopherson <sean.j.christopherson@...el.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Xiaoyao Li <xiaoyao.li@...el.com>
Subject: [PATCH v3 1/2] KVM: nVMX: Drop a redundant call to vmx_get_intr_info()

Drop nested_vmx_l1_wants_exit()'s initialization of intr_info from
vmx_get_intr_info() that was inadvertantly introduced along with the
caching mechanism.  EXIT_REASON_EXCEPTION_NMI, the only consumer of
intr_info, populates the variable before using it.

Fixes: bb53120d67cdb ("KVM: VMX: Cache vmcs.EXIT_INTR_INFO using arch avail_reg flags")
Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
---
 arch/x86/kvm/vmx/nested.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index f228339cd0a0..995c319cc7ad 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -5691,8 +5691,8 @@ static bool nested_vmx_l0_wants_exit(struct kvm_vcpu *vcpu, u32 exit_reason)
  */
 static bool nested_vmx_l1_wants_exit(struct kvm_vcpu *vcpu, u32 exit_reason)
 {
-	u32 intr_info = vmx_get_intr_info(vcpu);
 	struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
+	u32 intr_info;
 
 	switch (exit_reason) {
 	case EXIT_REASON_EXCEPTION_NMI:
-- 
2.26.0