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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0AA9DECAAD2 for ; Thu, 1 Sep 2022 21:18:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234002AbiIAVSv (ORCPT ); Thu, 1 Sep 2022 17:18:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59000 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233151AbiIAVSp (ORCPT ); Thu, 1 Sep 2022 17:18:45 -0400 Received: from mail-pj1-x1049.google.com (mail-pj1-x1049.google.com [IPv6:2607:f8b0:4864:20::1049]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9687A88DD3 for ; Thu, 1 Sep 2022 14:18:44 -0700 (PDT) Received: by mail-pj1-x1049.google.com with SMTP id g9-20020a17090a290900b001fd59cc2c14so110157pjd.7 for ; Thu, 01 Sep 2022 14:18:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=to:from:subject:message-id:references:mime-version:in-reply-to:date :from:to:cc:subject:date; bh=9FbEF2u2Wd8nNdrOcqEf1hjJETad70OGAaRnEVrgyZs=; b=tA8U8AtVPwpwQJnv8/Ju0yEsJiQZCkhrdkYMvlM69umJFpREDp09tZkqcrtJE6Ea50 vEEzYBmJvqkSEv7G2cZGTFVawCI07V0/XU7MFjgB4d8BUW5JdhHi6iKziJ3ZGC7/S/iK kCq0ldUplUfnTIAErUg3T07G9Yu3H8UCcCxwsmqAULKhqWaeP8K9oMEK/LhYa8LllzIR HJcKzFw/huceUzaEoJAy5OarWAa2mVMHFpyVAteBBF7p6g0YHotU14D67EhFuKGDDa+W SZFYEZ4wThGwUO92HWAS9QOY+MMZt8DMMJW92BSQq+MJnPg9FH1qJogTuJEqzX1ST5VN JxcA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=to:from:subject:message-id:references:mime-version:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date; bh=9FbEF2u2Wd8nNdrOcqEf1hjJETad70OGAaRnEVrgyZs=; b=pXH+DSZkU35pvubT5svx7tuAzwQh1RTemfRx/TM4Lp6dlGuUlflRvwWBLvK7qNrgOa bmQqVaVa0g5ixBXsbu1gLzcSrdk1aYNNGoXAzQxT+b78n6EW3uONd9fkgFH2tLKOUFXf 01YD5+2MykbbVuki5tgEujI62Et/8at2V9G3unL9FPzC16JTtxik4f8/qZBdlPnSBKk4 +Or6RuN+yaiUy7+IIUMKhidXavaILzV+4ERLux+UjMIJu4EuTTarSlYWwKskr8WJXLIz 1lc6EHw2K/ozEYuzE/5OqYrJ6HLt7Y7GFw1K8IxOYjvCFkPOxSqbaP0s8mUXBmbcQXgW 9eOQ== X-Gm-Message-State: ACgBeo0I+nO+0I+jAO1zrAmg670kDiUrIlbYS1Y3tF/b0dQEBNN517B1 nQdh963t9KSPPOmCrQVR9bU+EOKV52rx9A== X-Google-Smtp-Source: AA6agR4STjdtNy5UpF+u2VbqMIU5QX+iFd/AvwiK97WR//zap/n8GulygyWoxlkeLxeH5L+xApfuS5OrslhvXw== X-Received: from loggerhead.c.googlers.com ([fda3:e722:ac3:cc00:24:72f4:c0a8:29a]) (user=jmattson job=sendgmr) by 2002:a17:90a:e558:b0:1fb:c4b7:1a24 with SMTP id ei24-20020a17090ae55800b001fbc4b71a24mr107677pjb.1.1662067123612; Thu, 01 Sep 2022 14:18:43 -0700 (PDT) Date: Thu, 1 Sep 2022 14:18:07 -0700 In-Reply-To: <20220901211811.2883855-1-jmattson@google.com> Mime-Version: 1.0 References: <20220901211811.2883855-1-jmattson@google.com> X-Mailer: git-send-email 2.37.2.789.g6183377224-goog Message-ID: <20220901211811.2883855-2-jmattson@google.com> Subject: [PATCH v3 2/2] KVM: x86: Expose CPUID.(EAX=7,ECX=1).EAX[12:10] to the guest From: Jim Mattson To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , "H. Peter Anvin" , Sean Christopherson , Paolo Bonzini , Peter Zijlstra , Josh Poimboeuf , Pawan Gupta , "Chang S. Bae" , Jim Mattson , Babu Moger , Wyes Karny , "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , "open list:KERNEL VIRTUAL MACHINE FOR X86 (KVM/x86)" Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Fast zero-length REP MOVSB, fast short REP STOSB, and fast short REP {CMPSB,SCASB} are inherent features of the processor that cannot be hidden by the hypervisor. When these features are present on the host, enumerate them in KVM_GET_SUPPORTED_CPUID. Signed-off-by: Jim Mattson --- arch/x86/kvm/cpuid.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 75dcf7a72605..172cbfd60946 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -636,7 +636,7 @@ void kvm_set_cpu_caps(void) kvm_cpu_cap_set(X86_FEATURE_SPEC_CTRL_SSBD); kvm_cpu_cap_mask(CPUID_7_1_EAX, - F(AVX_VNNI) | F(AVX512_BF16) + F(AVX_VNNI) | F(AVX512_BF16) | F(FZRM) | F(FSRS) | F(FSRC) ); kvm_cpu_cap_mask(CPUID_D_1_EAX, -- 2.37.2.789.g6183377224-goog