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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: Junjie Mao <junjie.mao@intel.com>
Signed-off-by: Yongjie Ren <yongjien.ren@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Ren, Yongjie 2012-09-07 07:36:59 +00:00 committed by Avi Kivity
parent 749c59fd15
commit 4f97704555
1 changed files with 2 additions and 2 deletions
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4
arch/x86/kvm/vmx.c
View File

@ -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);
}
}