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([2001:b07:6468:f312:5e2c:eb9a:a8b6:fd3e]) by smtp.gmail.com with ESMTPSA id w2sm2377655ejn.73.2021.01.21.07.02.17 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 21 Jan 2021 07:02:18 -0800 (PST) Subject: Re: [PATCH 0/2] Enumerate and expose AVX_VNNI feature To: Yang Zhong , linux-kernel@vger.kernel.org, x86@kernel.org, kvm@vger.kernel.org Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, tony.luck@intel.com, seanjc@google.com, vkuznets@redhat.com, wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org, kyung.min.park@intel.com References: <20210105004909.42000-1-yang.zhong@intel.com> From: Paolo Bonzini Message-ID: Date: Thu, 21 Jan 2021 16:02:17 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: <20210105004909.42000-1-yang.zhong@intel.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05/01/21 01:49, Yang Zhong wrote: > A processor supports AVX_VNNI instructions if CPUID.(EAX=7,ECX=1):EAX[bit 4] > is present. > > This series includes kernel and kvm patches, kernel patch define this > new cpu feature bit and kvm expose this bit to guest. When this bit is > enabled on cpu or vcpu, the cpu feature flag is shown as "avx_vnni" in > /proc/cpuinfo of host and guest. > > Detailed information on the instruction and CPUID feature flag can be > found in the latest "extensions" manual [1]. > > Reference: > [1]. https://software.intel.com/content/www/us/en/develop/download/intel-architecture-instruction-set-extensions-programming-reference.html > > > Kyung Min Park (1): > Enumerate AVX Vector Neural Network instructions > > Yang Zhong (1): > KVM: Expose AVX_VNNI instruction to guset > > arch/x86/include/asm/cpufeatures.h | 1 + > arch/x86/kvm/cpuid.c | 2 +- > 2 files changed, 2 insertions(+), 1 deletion(-) > Queued, thanks. Paolo