linux-kernel - [PATCH 06/10] KVM: nVMX: Convert local exit_reason to u16 in ...enter_non_root

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Date:   Thu, 12 Mar 2020 11:45:17 -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 06/10] KVM: nVMX: Convert local exit_reason to u16 in ...enter_non_root_mode()

Use a u16 for nested_vmx_enter_non_root_mode()'s local "exit_reason" to
make it clear the intermediate code is only responsible for setting the
basic exit reason, e.g. FAILED_VMENTRY is unconditionally OR'd in when
emulating a failed VM-Entry.

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
---
 arch/x86/kvm/vmx/nested.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 1848ca0116c0..8fbbe2152ab7 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -3182,7 +3182,7 @@ enum nvmx_vmentry_status nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu,
 	struct vcpu_vmx *vmx = to_vmx(vcpu);
 	struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
 	bool evaluate_pending_interrupts;
-	u32 exit_reason = EXIT_REASON_INVALID_STATE;
+	u16 exit_reason = EXIT_REASON_INVALID_STATE;
 	u32 exit_qual;
 
 	evaluate_pending_interrupts = exec_controls_get(vmx) &
@@ -3308,7 +3308,7 @@ enum nvmx_vmentry_status nested_vmx_enter_non_root_mode(struct kvm_vcpu *vcpu,
 		return NVMX_VMENTRY_VMEXIT;
 
 	load_vmcs12_host_state(vcpu, vmcs12);
-	vmcs12->vm_exit_reason = exit_reason | VMX_EXIT_REASONS_FAILED_VMENTRY;
+	vmcs12->vm_exit_reason = VMX_EXIT_REASONS_FAILED_VMENTRY | exit_reason;
 	vmcs12->exit_qualification = exit_qual;
 	if (enable_shadow_vmcs || vmx->nested.hv_evmcs)
 		vmx->nested.need_vmcs12_to_shadow_sync = true;
-- 
2.24.1