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[11/29] KVM: nVMX: Capture VM-Fail via CC_{SET,OUT} in nested early checks

Message ID 20190118212037.24412-12-sean.j.christopherson@intel.com
State New, archived
Headers show
Series KVM: VMX: Move vCPU-run to proper asm sub-routine | expand

Commit Message

Sean Christopherson Jan. 18, 2019, 9:20 p.m. UTC
Take advantage of __GCC_ASM_FLAG_OUTPUTS__ when possible and also let
the compiler choose the register in all cases.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/kvm/vmx/nested.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
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Patch

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index c4f19315ee65..9b27300c80c4 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -2767,12 +2767,12 @@  static int nested_vmx_check_vmentry_hw(struct kvm_vcpu *vcpu)
 		 * VMLAUNCH and VMRESUME clear RFLAGS.{CF,ZF} on VM-Exit, set
 		 * RFLAGS.CF on VM-Fail Invalid and set RFLAGS.ZF on VM-Fail
 		 * Valid.  vmx_vmenter() directly "returns" RFLAGS, and so the
-		 * results of VM-Enter is captured via SETBE to vm_fail.
+		 * results of VM-Enter is captured via CC_{SET,OUT} to vm_fail.
 		 */
 		"call vmx_vmenter\n\t"
 
-		"setbe %%dl\n\t"
-	      : ASM_CALL_CONSTRAINT, "=dl"(vm_fail)
+		CC_SET(be)
+	      : ASM_CALL_CONSTRAINT, CC_OUT(be) (vm_fail)
 	      : "c"(vmx), "d"((unsigned long)HOST_RSP),
 		[launched]"i"(offsetof(struct vcpu_vmx, __launched)),
 		[host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)),