KVM: VMX: simplify invpcid handling in vmx_cpuid_update()
If vmx_invpcid_supported() is true, second execution control filed must be supported and SECONDARY_EXEC_ENABLE_INVPCID must have already been set in current vmcs by vmx_secondary_exec_control() If vmx_invpcid_supported() is false, no need to clear SECONDARY_EXEC_ENABLE_INVPCID Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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29541bb8f4
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@ -8694,19 +8694,12 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
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/* Exposing INVPCID only when PCID is exposed */
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best = kvm_find_cpuid_entry(vcpu, 0x7, 0);
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if (vmx_invpcid_supported() &&
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best && (best->ebx & bit(X86_FEATURE_INVPCID)) &&
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guest_cpuid_has_pcid(vcpu)) {
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(!best || !(best->ebx & bit(X86_FEATURE_INVPCID)) ||
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!guest_cpuid_has_pcid(vcpu))) {
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exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
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exec_control |= SECONDARY_EXEC_ENABLE_INVPCID;
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vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
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exec_control);
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} else {
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if (cpu_has_secondary_exec_ctrls()) {
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exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
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exec_control &= ~SECONDARY_EXEC_ENABLE_INVPCID;
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vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
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exec_control);
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}
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exec_control &= ~SECONDARY_EXEC_ENABLE_INVPCID;
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vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
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if (best)
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best->ebx &= ~bit(X86_FEATURE_INVPCID);
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}
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