Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752680AbdHDWNn (ORCPT ); Fri, 4 Aug 2017 18:13:43 -0400 Received: from mx1.redhat.com ([209.132.183.28]:52888 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752505AbdHDWNT (ORCPT ); Fri, 4 Aug 2017 18:13:19 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com BA0E58048C Authentication-Results: ext-mx04.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx04.extmail.prod.ext.phx2.redhat.com; spf=fail smtp.mailfrom=rkrcmar@redhat.com From: =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Paolo Bonzini , David Hildenbrand Subject: [PATCH v2 3/3] KVM: x86: use general helpers for some cpuid manipulation Date: Sat, 5 Aug 2017 00:12:50 +0200 Message-Id: <20170804221250.27674-4-rkrcmar@redhat.com> In-Reply-To: <20170804221250.27674-1-rkrcmar@redhat.com> References: <20170804221250.27674-1-rkrcmar@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Fri, 04 Aug 2017 22:13:18 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3469 Lines: 108 Add guest_cpuid_clear() and use it instead of kvm_find_cpuid_entry(). Also replace some uses of kvm_find_cpuid_entry() with guest_cpuid_has(). Signed-off-by: Radim Krčmář --- v2: added __always_inline (Paolo) --- arch/x86/kvm/cpuid.h | 9 +++++++++ arch/x86/kvm/svm.c | 5 +---- arch/x86/kvm/vmx.c | 6 ++---- arch/x86/kvm/x86.c | 14 ++------------ 4 files changed, 14 insertions(+), 20 deletions(-) diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h index 4e9ac93b4f3a..ac15193e5e52 100644 --- a/arch/x86/kvm/cpuid.h +++ b/arch/x86/kvm/cpuid.h @@ -104,6 +104,15 @@ static __always_inline bool guest_cpuid_has(struct kvm_vcpu *vcpu, unsigned x86_ return *reg & bit(x86_feature); } +static __always_inline void guest_cpuid_clear(struct kvm_vcpu *vcpu, unsigned x86_feature) +{ + int *reg; + + reg = guest_cpuid_get_register(vcpu, x86_feature); + if (reg) + *reg &= ~bit(x86_feature); +} + static inline bool guest_cpuid_is_amd(struct kvm_vcpu *vcpu) { struct kvm_cpuid_entry2 *best; diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index b8196aecbdcc..2432bb952a30 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -5075,7 +5075,6 @@ static u64 svm_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio) static void svm_cpuid_update(struct kvm_vcpu *vcpu) { struct vcpu_svm *svm = to_svm(vcpu); - struct kvm_cpuid_entry2 *entry; /* Update nrips enabled cache */ svm->nrips_enabled = !!guest_cpuid_has(&svm->vcpu, X86_FEATURE_NRIPS); @@ -5083,9 +5082,7 @@ static void svm_cpuid_update(struct kvm_vcpu *vcpu) if (!kvm_vcpu_apicv_active(vcpu)) return; - entry = kvm_find_cpuid_entry(vcpu, 1, 0); - if (entry) - entry->ecx &= ~bit(X86_FEATURE_X2APIC); + guest_cpuid_clear(vcpu, X86_FEATURE_X2APIC); } static void svm_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 85b73c1f963a..1731c7aca464 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -9472,15 +9472,13 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu) if (vmx_invpcid_supported()) { /* Exposing INVPCID only when PCID is exposed */ - struct kvm_cpuid_entry2 *best = kvm_find_cpuid_entry(vcpu, 0x7, 0); bool invpcid_enabled = - best && best->ebx & bit(X86_FEATURE_INVPCID) && + guest_cpuid_has(vcpu, X86_FEATURE_INVPCID) && guest_cpuid_has(vcpu, X86_FEATURE_PCID); if (!invpcid_enabled) { secondary_exec_ctl &= ~SECONDARY_EXEC_ENABLE_INVPCID; - if (best) - best->ebx &= ~bit(X86_FEATURE_INVPCID); + guest_cpuid_clear(vcpu, X86_FEATURE_INVPCID); } if (nested) { diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index ee4e251c82fc..33fd6b6419ef 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1022,21 +1022,11 @@ bool kvm_valid_efer(struct kvm_vcpu *vcpu, u64 efer) if (efer & efer_reserved_bits) return false; - if (efer & EFER_FFXSR) { - struct kvm_cpuid_entry2 *feat; - - feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); - if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) + if (efer & EFER_FFXSR && !guest_cpuid_has(vcpu, X86_FEATURE_FXSR_OPT)) return false; - } - if (efer & EFER_SVME) { - struct kvm_cpuid_entry2 *feat; - - feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); - if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) + if (efer & EFER_SVME && !guest_cpuid_has(vcpu, X86_FEATURE_SVM)) return false; - } return true; } -- 2.13.3