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Mon, 17 May 2021 07:20:26 -0400 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-285-Ms6Va4ieMvaIA3bFJk5jbQ-1; Mon, 17 May 2021 07:20:18 -0400 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.phx2.redhat.com [10.5.11.23]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 0F4151868414; Mon, 17 May 2021 11:20:17 +0000 (UTC) Received: from virtlab701.virt.lab.eng.bos.redhat.com (virtlab701.virt.lab.eng.bos.redhat.com [10.19.152.228]) by smtp.corp.redhat.com (Postfix) with ESMTP id E4A241A872; Mon, 17 May 2021 11:20:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1621250422; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=q8Za17RBhV6g2KpwxhRf+kRGfy9maZw+084DxkHsHJs=; b=DXJt6Sx+aA2ifu5PAOzKtqWmma0Q7qkcrR4HI9au22oB0c8SACpCqiA8GjstDNnWGuwGIK hu9vG90it+sX/c3JqlayVIOyEzr5cxEkmicotYiJYNuj/92+mmPudQGexYZWx0DV5oPda6 +/UoeRNIl0H3Rrs+YsiBpy73BRUEQ8A= X-MC-Unique: Ms6Va4ieMvaIA3bFJk5jbQ-1 From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PULL 06/20] i386/cpu: Expose AVX_VNNI instruction to guest Date: Mon, 17 May 2021 07:19:47 -0400 Message-Id: <20210517112001.2564006-7-pbonzini@redhat.com> In-Reply-To: <20210517112001.2564006-1-pbonzini@redhat.com> References: <20210517112001.2564006-1-pbonzini@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=pbonzini@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.205.24.124; envelope-from=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -31 X-Spam_score: -3.2 X-Spam_bar: --- X-Spam_report: (-3.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.374, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Yang Zhong Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) Content-Type: text/plain; charset="utf-8" From: Yang Zhong Expose AVX (VEX-encoded) versions of the Vector Neural Network Instructions to guest. The bit definition: CPUID.(EAX=3D7,ECX=3D1):EAX[bit 4] AVX_VNNI The following instructions are available when this feature is present in the guest. 1. VPDPBUS: Multiply and Add Unsigned and Signed Bytes 2. VPDPBUSDS: Multiply and Add Unsigned and Signed Bytes with Saturation 3. VPDPWSSD: Multiply and Add Signed Word Integers 4. VPDPWSSDS: Multiply and Add Signed Integers with Saturation As for the kvm related code, please reference Linux commit id 1085a6b585d7. The release document ref below link: https://software.intel.com/content/www/us/en/develop/download/\ intel-architecture-instruction-set-extensions-programming-reference.html Signed-off-by: Yang Zhong Message-Id: <20210407015609.22936-1-yang.zhong@intel.com> Signed-off-by: Paolo Bonzini --- target/i386/cpu.c | 4 ++-- target/i386/cpu.h | 2 ++ 2 files changed, 4 insertions(+), 2 deletions(-) diff --git a/target/i386/cpu.c b/target/i386/cpu.c index c496bfa1c2..9e211ac2ce 100644 --- a/target/i386/cpu.c +++ b/target/i386/cpu.c @@ -940,7 +940,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] =3D { .type =3D CPUID_FEATURE_WORD, .feat_names =3D { NULL, NULL, NULL, NULL, - NULL, "avx512-bf16", NULL, NULL, + "avx-vnni", "avx512-bf16", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, @@ -3194,7 +3194,7 @@ static X86CPUDefinition builtin_x86_defs[] =3D { MSR_ARCH_CAP_SKIP_L1DFL_VMENTRY | MSR_ARCH_CAP_MDS_NO | MSR_ARCH_CAP_PSCHANGE_MC_NO | MSR_ARCH_CAP_TAA_NO, .features[FEAT_7_1_EAX] =3D - CPUID_7_1_EAX_AVX512_BF16, + CPUID_7_1_EAX_AVX_VNNI | CPUID_7_1_EAX_AVX512_BF16, /* * Missing: XSAVES (not supported by some Linux versions, * including v4.1 to v4.12). diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 324ef92beb..d4e80e1344 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -817,6 +817,8 @@ typedef uint64_t FeatureWordArray[FEATURE_WORDS]; /* Speculative Store Bypass Disable */ #define CPUID_7_0_EDX_SPEC_CTRL_SSBD (1U << 31) =20 +/* AVX VNNI Instruction */ +#define CPUID_7_1_EAX_AVX_VNNI (1U << 4) /* AVX512 BFloat16 Instruction */ #define CPUID_7_1_EAX_AVX512_BF16 (1U << 5) =20 --=20 2.27.0