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([2001:b07:6468:f312:1c09:f536:3de6:228c]) by smtp.googlemail.com with ESMTPSA id r17-20020a17090609d100b00781d411a63csm3948244eje.151.2022.09.29.06.26.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 29 Sep 2022 06:26:04 -0700 (PDT) Message-ID: <08dab49f-9ca4-4978-4482-1815cf168e74@redhat.com> Date: Thu, 29 Sep 2022 15:26:03 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.2.1 Subject: Re: [PATCH] KVM: x86: disable on 32-bit unless CONFIG_BROKEN To: Sean Christopherson , Maxim Levitsky Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org References: <20220926165112.603078-1-pbonzini@redhat.com> <15291c3f-d55c-a206-9261-253a1a33dce1@redhat.com> Content-Language: en-US From: Paolo Bonzini In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-6.3 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_NONE 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 9/28/22 19:55, Sean Christopherson wrote: >> As far as my opinion goes I do volunteer to test this code more often, >> and I do not want to see the 32 bit KVM support be removed*yet*. > > Yeah, I 100% agree that it shouldn't be removed until we have equivalent test > coverage. But I do think it should an "off-by-default" sort of thing. Maybe > BROKEN is the wrong dependency though? E.g. would EXPERT be a better option? Yeah, maybe EXPERT is better but I'm not sure of the equivalent test coverage. 32-bit VMX/SVM kvm-unit-tests are surely a good idea, but what's wrong with booting an older guest? Paolo