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Commit 4f977045 authored by Ren, Yongjie's avatar Ren, Yongjie Committed by Avi Kivity
Browse files

KVM: x86: Check INVPCID feature bit in EBX of leaf 7 



Checks and operations on the INVPCID feature bit should use EBX
of CPUID leaf 7 instead of ECX.

Signed-off-by: default avatarJunjie Mao <junjie.mao@intel.com>
Signed-off-by: default avatarYongjie Ren <yongjien.ren@intel.com>
Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent 749c59fd

arch/x86/kvm/vmx.c

+2 −2
Original line number Diff line number Diff line
@@ -6575,7 +6575,7 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu) 
	/* Exposing INVPCID only when PCID is exposed */

	best = kvm_find_cpuid_entry(vcpu, 0x7, 0);

	if (vmx_invpcid_supported() &&

	    best && (best->ecx & bit(X86_FEATURE_INVPCID)) &&

	    best && (best->ebx & bit(X86_FEATURE_INVPCID)) &&

	    guest_cpuid_has_pcid(vcpu)) {

		exec_control |= SECONDARY_EXEC_ENABLE_INVPCID;

		vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
@@ -6585,7 +6585,7 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu) 
		vmcs_write32(SECONDARY_VM_EXEC_CONTROL,

			     exec_control);

		if (best)

			best->ecx &= ~bit(X86_FEATURE_INVPCID);

			best->ebx &= ~bit(X86_FEATURE_INVPCID);

	}

}