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[213.175.37.10]) by smtp.gmail.com with ESMTPSA id h13sm23118178wrw.54.2020.02.25.06.10.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Feb 2020 06:10:33 -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 53/61] KVM: VMX: Directly use VMX capabilities helper to detect RDTSCP support In-Reply-To: <20200201185218.24473-54-sean.j.christopherson@intel.com> References: <20200201185218.24473-1-sean.j.christopherson@intel.com> <20200201185218.24473-54-sean.j.christopherson@intel.com> Date: Tue, 25 Feb 2020 15:10:32 +0100 Message-ID: <87pne2lpuv.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: > Use cpu_has_vmx_rdtscp() directly when computing secondary exec controls > and drop the now defunct vmx_rdtscp_supported(). > > No functional change intended. > > Signed-off-by: Sean Christopherson > --- > arch/x86/kvm/vmx/vmx.c | 7 +------ > 1 file changed, 1 insertion(+), 6 deletions(-) > > diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c > index c3577f11f538..98d54cfa0cbe 100644 > --- a/arch/x86/kvm/vmx/vmx.c > +++ b/arch/x86/kvm/vmx/vmx.c > @@ -1651,11 +1651,6 @@ static void vmx_queue_exception(struct kvm_vcpu *vcpu) > vmx_clear_hlt(vcpu); > } > > -static bool vmx_rdtscp_supported(void) > -{ > - return cpu_has_vmx_rdtscp(); > -} > - > /* > * Swap MSR entry in host/guest MSR entry array. > */ > @@ -4051,7 +4046,7 @@ static void vmx_compute_secondary_exec_control(struct vcpu_vmx *vmx) > } > } > > - if (vmx_rdtscp_supported()) { > + if (cpu_has_vmx_rdtscp()) { > bool rdtscp_enabled = guest_cpuid_has(vcpu, X86_FEATURE_RDTSCP); > if (!rdtscp_enabled) > exec_control &= ~SECONDARY_EXEC_RDTSCP; Reviewed-by: Vitaly Kuznetsov -- Vitaly