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([2001:b07:6468:f312:9af8:e5f5:7516:fa89]) by smtp.googlemail.com with ESMTPSA id a6-20020a1709063e8600b0072f42ca2934sm2321108ejj.148.2022.08.10.05.52.12 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 10 Aug 2022 05:52:12 -0700 (PDT) Message-ID: <29150d3f-36fb-516d-55d0-a9aebe23cdcf@redhat.com> Date: Wed, 10 Aug 2022 14:52:11 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.12.0 Subject: Re: [RFC PATCH 2/3] KVM: x86: Generate set of VMX feature MSRs using first/last definitions Content-Language: en-US To: Sean Christopherson Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Like Xu References: <20220805172945.35412-1-seanjc@google.com> <20220805172945.35412-3-seanjc@google.com> From: Paolo Bonzini In-Reply-To: <20220805172945.35412-3-seanjc@google.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 8/5/22 19:29, Sean Christopherson wrote: > > +static void kvm_proble_feature_msr(u32 msr_index) > +{ > + struct kvm_msr_entry msr = { > + .index = msr_index, > + }; > + > + if (kvm_get_msr_feature(&msr)) > + return; > + > + msr_based_features[num_msr_based_features++] = msr_index; > +} > + > static void kvm_init_msr_list(void) > { > u32 dummy[2]; > @@ -6954,15 +6949,11 @@ static void kvm_init_msr_list(void) > emulated_msrs[num_emulated_msrs++] = emulated_msrs_all[i]; > } > > - for (i = 0; i < ARRAY_SIZE(msr_based_features_all); i++) { > - struct kvm_msr_entry msr; > + for (i = KVM_FIRST_EMULATED_VMX_MSR; i <= KVM_LAST_EMULATED_VMX_MSR; i++) > + kvm_proble_feature_msr(i); > > - msr.index = msr_based_features_all[i]; > - if (kvm_get_msr_feature(&msr)) > - continue; > - > - msr_based_features[num_msr_based_features++] = msr_based_features_all[i]; > - } > + for (i = 0; i < ARRAY_SIZE(msr_based_features_all_except_vmx); i++) > + kvm_proble_feature_msr(msr_based_features_all_except_vmx[i]); I'd rather move all the code to a new function kvm_init_feature_msr_list() instead, and call it from kvm_arch_hardware_setup(). Thanks, paolo