From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.8 required=3.0 tests=BAYES_00, DATE_IN_FUTURE_06_12,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E5E75C433DB for ; Sun, 7 Feb 2021 07:00:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A59EC64E74 for ; Sun, 7 Feb 2021 07:00:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229848AbhBGG7t (ORCPT ); Sun, 7 Feb 2021 01:59:49 -0500 Received: from mga07.intel.com ([134.134.136.100]:48424 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229760AbhBGG7O (ORCPT ); Sun, 7 Feb 2021 01:59:14 -0500 IronPort-SDR: Fplw0Ks5A0an3AWPRLceVCe15xtKJFXWq5HCn/GUJ7pJvRnNd9nILgywvw6yxGHDtkhZjV11gd Q51vK/Zb0QTA== X-IronPort-AV: E=McAfee;i="6000,8403,9887"; a="245660856" X-IronPort-AV: E=Sophos;i="5.81,159,1610438400"; d="scan'208";a="245660856" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Feb 2021 22:54:54 -0800 IronPort-SDR: JI3+I43vA2iN7QPW06eqGbRN+vVN5uA+8qX27WliyfFBVddv2eYOem6wEolA3qKJMYGLhCyELL avaRFN++rIlA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,159,1610438400"; d="scan'208";a="410376680" Received: from vmmteam.bj.intel.com ([10.240.193.86]) by fmsmga004.fm.intel.com with ESMTP; 06 Feb 2021 22:54:53 -0800 From: Jing Liu To: pbonzini@redhat.com, seanjc@google.com, kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, jing2.liu@intel.com Subject: [PATCH RFC 6/7] kvm: x86: Add AMX_TILE, AMX_INT8 and AMX_BF16 support Date: Sun, 7 Feb 2021 10:42:55 -0500 Message-Id: <20210207154256.52850-7-jing2.liu@linux.intel.com> X-Mailer: git-send-email 2.18.4 In-Reply-To: <20210207154256.52850-1-jing2.liu@linux.intel.com> References: <20210207154256.52850-1-jing2.liu@linux.intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Intel introduces AMX architecture in SPR platform, which includes AMX_TILE, AMX_INT8 and AMX_BF16 support. Exposes these features to KVM guest. Signed-off-by: Jing Liu --- arch/x86/kvm/cpuid.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index ee1fac0a865e..1b3ea9195a75 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -423,7 +423,8 @@ void kvm_set_cpu_caps(void) F(AVX512_4VNNIW) | F(AVX512_4FMAPS) | F(SPEC_CTRL) | F(SPEC_CTRL_SSBD) | F(ARCH_CAPABILITIES) | F(INTEL_STIBP) | F(MD_CLEAR) | F(AVX512_VP2INTERSECT) | F(FSRM) | - F(SERIALIZE) | F(TSXLDTRK) + F(SERIALIZE) | F(TSXLDTRK) | + F(AMX_TILE) | F(AMX_INT8) | F(AMX_BF16) ); /* TSC_ADJUST and ARCH_CAPABILITIES are emulated in software. */ @@ -544,6 +545,8 @@ static struct kvm_cpuid_entry2 *do_host_cpuid(struct kvm_cpuid_array *array, case 0x14: case 0x17: case 0x18: + case 0x1d: + case 0x1e: case 0x1f: case 0x8000001d: entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; @@ -667,6 +670,8 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function) break; case 9: break; + case 0x1e: + break; case 0xa: { /* Architectural Performance Monitoring */ struct x86_pmu_capability cap; union cpuid10_eax eax; @@ -766,9 +771,12 @@ static inline int __do_cpuid_func(struct kvm_cpuid_array *array, u32 function) entry->edx = 0; } break; + /* Intel AMX TILE */ + case 0x1d: /* Intel PT */ case 0x14: - if (!kvm_cpu_cap_has(X86_FEATURE_INTEL_PT)) { + if ((function == 0x14 && !kvm_cpu_cap_has(X86_FEATURE_INTEL_PT)) || + (function == 0x1d && !kvm_cpu_cap_has(X86_FEATURE_AMX_TILE))) { entry->eax = entry->ebx = entry->ecx = entry->edx = 0; break; } -- 2.18.4