From f36201e5f44b55faf44ddc820929548e51ec841b Mon Sep 17 00:00:00 2001 From: Xiao Guangrong Date: Wed, 9 Sep 2015 14:05:53 +0800 Subject: [PATCH] KVM: VMX: simplify rdtscp handling in vmx_cpuid_update() if vmx_rdtscp_supported() is true SECONDARY_EXEC_RDTSCP must have already been set in current vmcs by vmx_secondary_exec_control() Signed-off-by: Xiao Guangrong Signed-off-by: Paolo Bonzini --- arch/x86/kvm/vmx.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 8f4c13808232..d53f57aad5eb 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -8677,16 +8677,15 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu) vmx->rdtscp_enabled = false; if (vmx_rdtscp_supported()) { exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL); - if (exec_control & SECONDARY_EXEC_RDTSCP) { - best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); - if (best && (best->edx & bit(X86_FEATURE_RDTSCP))) - vmx->rdtscp_enabled = true; - else { - exec_control &= ~SECONDARY_EXEC_RDTSCP; - vmcs_write32(SECONDARY_VM_EXEC_CONTROL, - exec_control); - } + best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); + if (best && (best->edx & bit(X86_FEATURE_RDTSCP))) + vmx->rdtscp_enabled = true; + else { + exec_control &= ~SECONDARY_EXEC_RDTSCP; + vmcs_write32(SECONDARY_VM_EXEC_CONTROL, + exec_control); } + if (nested && !vmx->rdtscp_enabled) vmx->nested.nested_vmx_secondary_ctls_high &= ~SECONDARY_EXEC_RDTSCP; -- 2.20.1