[PATCH] Check use I/O bitmap first before unconditional I/O exit

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Signed-off-by: Zhihui Zhang <zzhsuny@xxxxxxxxx>
---
 arch/x86/kvm/vmx.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index b2fe1c2..44d4f829 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -6460,11 +6460,11 @@ static bool nested_vmx_exit_handled_io(struct kvm_vcpu *vcpu,
 	int size;
 	u8 b;
 
-	if (nested_cpu_has(vmcs12, CPU_BASED_UNCOND_IO_EXITING))
-		return 1;
-
-	if (!nested_cpu_has(vmcs12, CPU_BASED_USE_IO_BITMAPS))
+	if (!nested_cpu_has(vmcs12, CPU_BASED_USE_IO_BITMAPS)) {
+		if (nested_cpu_has(vmcs12, CPU_BASED_UNCOND_IO_EXITING))
+			return 1;
 		return 0;
+	}
 
 	exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
 
-- 
1.8.1.2

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