From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753909AbbIIGNW (ORCPT ); Wed, 9 Sep 2015 02:13:22 -0400 Received: from mga02.intel.com ([134.134.136.20]:53009 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753271AbbIIGM0 (ORCPT ); Wed, 9 Sep 2015 02:12:26 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.17,495,1437462000"; d="scan'208";a="641238358" From: Xiao Guangrong To: pbonzini@redhat.com Cc: gleb@kernel.org, mtosatti@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Xiao Guangrong Subject: [PATCH v2 8/8] KVM: VMX: drop rdtscp_enabled field Date: Wed, 9 Sep 2015 14:05:57 +0800 Message-Id: <1441778757-5866-9-git-send-email-guangrong.xiao@linux.intel.com> X-Mailer: git-send-email 2.4.3 In-Reply-To: <1441778757-5866-1-git-send-email-guangrong.xiao@linux.intel.com> References: <1441778757-5866-1-git-send-email-guangrong.xiao@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Check cpuid bit instead of it Signed-off-by: Xiao Guangrong --- arch/x86/kvm/cpuid.h | 8 ++++++++ arch/x86/kvm/vmx.c | 19 ++++++------------- 2 files changed, 14 insertions(+), 13 deletions(-) diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h index aed7bfe..d434ee9 100644 --- a/arch/x86/kvm/cpuid.h +++ b/arch/x86/kvm/cpuid.h @@ -141,4 +141,12 @@ static inline bool guest_cpuid_has_pcommit(struct kvm_vcpu *vcpu) best = kvm_find_cpuid_entry(vcpu, 7, 0); return best && (best->ebx & bit(X86_FEATURE_PCOMMIT)); } + +static inline bool guest_cpuid_has_rdtscp(struct kvm_vcpu *vcpu) +{ + struct kvm_cpuid_entry2 *best; + + best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); + return best && (best->edx & bit(X86_FEATURE_RDTSCP)); +} #endif diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index f18f744..2e98e6d 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -532,8 +532,6 @@ struct vcpu_vmx { s64 vnmi_blocked_time; u32 exit_reason; - bool rdtscp_enabled; - /* Posted interrupt descriptor */ struct pi_desc pi_desc; @@ -2207,7 +2205,7 @@ static void setup_msrs(struct vcpu_vmx *vmx) if (index >= 0) move_msr_up(vmx, index, save_nmsrs++); index = __find_msr_index(vmx, MSR_TSC_AUX); - if (index >= 0 && vmx->rdtscp_enabled) + if (index >= 0 && guest_cpuid_has_rdtscp(&vmx->vcpu)) move_msr_up(vmx, index, save_nmsrs++); /* * MSR_STAR is only needed on long mode guests, and only @@ -2674,7 +2672,7 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) msr_info->data = vcpu->arch.ia32_xss; break; case MSR_TSC_AUX: - if (!to_vmx(vcpu)->rdtscp_enabled) + if (!guest_cpuid_has_rdtscp(vcpu)) return 1; /* Otherwise falls through */ default: @@ -2780,7 +2778,7 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info) clear_atomic_switch_msr(vmx, MSR_IA32_XSS); break; case MSR_TSC_AUX: - if (!vmx->rdtscp_enabled) + if (!guest_cpuid_has_rdtscp(vcpu)) return 1; /* Check reserved bit, higher 32 bits should be zero */ if ((data >> 32) != 0) @@ -8664,15 +8662,10 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu) struct vcpu_vmx *vmx = to_vmx(vcpu); u32 clear_exe_ctrl = 0; - vmx->rdtscp_enabled = false; - if (vmx_rdtscp_supported()) { - best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); - if (best && (best->edx & bit(X86_FEATURE_RDTSCP))) - vmx->rdtscp_enabled = true; - else - clear_exe_ctrl |= SECONDARY_EXEC_RDTSCP; + if (vmx_rdtscp_supported() && !guest_cpuid_has_rdtscp(vcpu)) { + clear_exe_ctrl |= SECONDARY_EXEC_RDTSCP; - if (nested && !vmx->rdtscp_enabled) + if (nested) vmx->nested.nested_vmx_secondary_ctls_high &= ~SECONDARY_EXEC_RDTSCP; } -- 2.4.3