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[213.175.37.10]) by smtp.gmail.com with ESMTPSA id l9-20020a1709060cc900b006ce04bb8668sm3691909ejh.184.2022.03.18.07.31.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 18 Mar 2022 07:31:22 -0700 (PDT) Message-ID: Date: Fri, 18 Mar 2022 15:31:20 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.6.2 Subject: Re: [PATCH] x86/amx: compatible with older kernel release To: Yang Zhong , qemu-devel@nongnu.org References: <20220318115529.4850-1-yang.zhong@intel.com> From: =?UTF-8?B?TWljaGFsIFByw612b3puw61r?= In-Reply-To: <20220318115529.4850-1-yang.zhong@intel.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=mprivozn@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=mprivozn@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, pkrempa@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 3/18/22 12:55, Yang Zhong wrote: > The AMX KVM introduced one new ARCH_GET_XCOMP_SUPP system attribute > API to get host side supported_xcr0 and latest Qemu can decide if it > can request dynamically enabled XSAVE features permission. But this > implementation(19db68ca68) did not consider older kernel release. > This patch can avoid to read this new KVM_GET_DEVICE_ATTR ioctl. > > Signed-off-by: Yang Zhong > --- > target/i386/kvm/kvm.c | 16 ++++++++-------- > 1 file changed, 8 insertions(+), 8 deletions(-) Tested-by: Michal Privoznik Thank you. Michal