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[213.175.37.10]) by smtp.gmail.com with ESMTPSA id j66sm4400946wmb.21.2020.02.25.06.06.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Feb 2020 06:06:57 -0800 (PST) From: Vitaly Kuznetsov To: Sean Christopherson Cc: Paolo Bonzini , Wanpeng Li , Jim Mattson , Joerg Roedel , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 51/61] KVM: x86: Use kvm_cpu_caps to detect Intel PT support In-Reply-To: <20200201185218.24473-52-sean.j.christopherson@intel.com> References: <20200201185218.24473-1-sean.j.christopherson@intel.com> <20200201185218.24473-52-sean.j.christopherson@intel.com> Date: Tue, 25 Feb 2020 15:06:56 +0100 Message-ID: <87v9nulq0v.fsf@vitty.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Sean Christopherson writes: > Check for Intel PT using kvm_cpu_cap_has() to pave the way toward > eliminating ->pt_supported(). > > No functional change intended. > > Signed-off-by: Sean Christopherson > --- > arch/x86/kvm/cpuid.c | 3 +-- > 1 file changed, 1 insertion(+), 2 deletions(-) > > diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c > index a37cb6fda979..3d287fc6eb6e 100644 > --- a/arch/x86/kvm/cpuid.c > +++ b/arch/x86/kvm/cpuid.c > @@ -507,7 +507,6 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function) > { > struct kvm_cpuid_entry2 *entry; > int r, i, max_idx; > - unsigned f_intel_pt = kvm_x86_ops->pt_supported() ? F(INTEL_PT) : 0; > > /* all calls to cpuid_count() should be made on the same cpu */ > get_cpu(); > @@ -687,7 +686,7 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function) > break; > /* Intel PT */ > case 0x14: > - if (!f_intel_pt) { > + if (!kvm_cpu_cap_has(X86_FEATURE_INTEL_PT)) { > entry->eax = entry->ebx = entry->ecx = entry->edx = 0; > break; > } Reviewed-by: Vitaly Kuznetsov -- Vitaly