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[35.230.65.123]) by smtp.gmail.com with ESMTPSA id e17-20020aa798d1000000b00525496442ccsm25310656pfm.216.2022.07.06.15.27.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 06 Jul 2022 15:27:12 -0700 (PDT) Date: Wed, 6 Jul 2022 22:27:08 +0000 From: Sean Christopherson To: Vitaly Kuznetsov Cc: kvm@vger.kernel.org, Paolo Bonzini , Anirudh Rayabharam , Wanpeng Li , Jim Mattson , Maxim Levitsky , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 13/28] KVM: VMX: Get rid of eVMCS specific VMX controls sanitization Message-ID: References: <20220629150625.238286-1-vkuznets@redhat.com> <20220629150625.238286-14-vkuznets@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220629150625.238286-14-vkuznets@redhat.com> X-Spam-Status: No, score=-17.6 required=5.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF, ENV_AND_HDR_SPF_MATCH,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE,USER_IN_DEF_DKIM_WL,USER_IN_DEF_SPF_WL autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 29, 2022, Vitaly Kuznetsov wrote: > With the updated eVMCSv1 definition, there's no known 'problematic' > controls which are exposed in VMX control MSRs but are not present in > eVMCSv1. Get rid of the filtering. Ah, this patch is confusing until one realizes that this is dropping the "filtering" for what controls/features _KVM_ uses, whereas nested_evmcs_filter_control_msr() filters controls that are presented to L1. Can you add something to clarify that in the changelog?