[PATCH 2/2] KVM: VMX: Dedup VM-Enter error handling for VM-Fail and VM-Exit

[Sean Christopherson <seanjc@google.com>]

Dedup the error handling code for failed VM-Entry as the only difference
between the VM-Fail and VM-Exit cases is the source of the failure reason.

Other than clearing vmx->fail on a VM-Exit failure, which should be a nop
absent other bugs, no functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 arch/x86/kvm/vmx/vmx.c | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 29aa93cea963..a15cdad5c06a 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6741,21 +6741,13 @@ int vmx_handle_exit(struct kvm_vcpu *vcpu, fastpath_t exit_fastpath)
 	if (vmx->vt.emulation_required)
 		return handle_invalid_guest_state(vcpu);
 
-	if (exit_reason.failed_vmentry) {
+	if (exit_reason.failed_vmentry || unlikely(vmx->fail)) {
 		dump_vmcs(vcpu);
 		vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
-		vcpu->run->fail_entry.hardware_entry_failure_reason
-			= exit_reason.full;
+		vcpu->run->fail_entry.hardware_entry_failure_reason =
+			vmx->fail ? vmcs_read32(VM_INSTRUCTION_ERROR) : exit_reason.full;
 		vcpu->run->fail_entry.cpu = vcpu->arch.last_vmentry_cpu;
-		return 0;
-	}
 
-	if (unlikely(vmx->fail)) {
-		dump_vmcs(vcpu);
-		vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
-		vcpu->run->fail_entry.hardware_entry_failure_reason
-			= vmcs_read32(VM_INSTRUCTION_ERROR);
-		vcpu->run->fail_entry.cpu = vcpu->arch.last_vmentry_cpu;
 		vmx->fail = 0;
 		return 0;
 	}
-- 
2.56.0.257.gf7497c7d27-goog