From 29541bb8f4a18b2939dea137315e1803b4617c8d Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Wed, 9 Sep 2015 14:05:54 +0800 Subject: [PATCH] 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 Signed-off-by: Paolo Bonzini --- arch/x86/kvm/vmx.c | 17 +++++------------ 1 file changed, 5 insertions(+), 12 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index d53f57aad5eb..a5b26a940df2 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -8694,19 +8694,12 @@ 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->ebx & bit(X86_FEATURE_INVPCID)) && - guest_cpuid_has_pcid(vcpu)) { + (!best || !(best->ebx & bit(X86_FEATURE_INVPCID)) || + !guest_cpuid_has_pcid(vcpu))) { exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); - exec_control |= SECONDARY_EXEC_ENABLE_INVPCID; - vmcs_write32(SECONDARY_VM_EXEC_CONTROL, - exec_control); - } else { - if (cpu_has_secondary_exec_ctrls()) { - exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); - exec_control &= ~SECONDARY_EXEC_ENABLE_INVPCID; - vmcs_write32(SECONDARY_VM_EXEC_CONTROL, - exec_control); - } + exec_control &= ~SECONDARY_EXEC_ENABLE_INVPCID; + vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control); + if (best) best->ebx &= ~bit(X86_FEATURE_INVPCID); } -- 2.20.1