Commit bbc0b823 authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
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KVM: nVMX: Capture VM-Fail via CC_{SET,OUT} in nested early checks 



...to take advantage of __GCC_ASM_FLAG_OUTPUTS__ when possible.

Reviewed-by: default avatarJim Mattson <jmattson@google.com>
Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent f1727b49

arch/x86/kvm/vmx/nested.c

+3 −3
Original line number Diff line number Diff line
@@ -2768,12 +2768,12 @@ 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 %[fail]\n\t"

	      : ASM_CALL_CONSTRAINT, [fail]"=qm"(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)),

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