From nobody Fri Apr 3 06:40:35 2026 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 1F2E8C54EE9 for ; Fri, 16 Sep 2022 04:59:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229553AbiIPE7K (ORCPT ); Fri, 16 Sep 2022 00:59:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57656 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229758AbiIPE7A (ORCPT ); Fri, 16 Sep 2022 00:59:00 -0400 Received: from mail-pl1-x64a.google.com (mail-pl1-x64a.google.com [IPv6:2607:f8b0:4864:20::64a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DDBC6A1D1A for ; Thu, 15 Sep 2022 21:58:57 -0700 (PDT) Received: by mail-pl1-x64a.google.com with SMTP id j3-20020a170902da8300b001782a6fbc87so10358202plx.5 for ; Thu, 15 Sep 2022 21:58:57 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date; bh=7tZtbYb4b1WkABBBL7k03zVW6CHmPIA8CRpYxtt3dU4=; b=iB5PxJYEAA0x/1haaI/7S9TwcOIBOOzjGR31ZHeCB55hkaUE9xPGs6EoFssfP+Xy0n s3W7PfvEnr/zQ9kWhOfk03Ye3Uls2qrOXPDKxUQInX5UoeRZw6hytIPjdHgDSC6QRGy8 7daxj6hjkqbkdZTLGteg4l29iVNwINa70vUjYh083Rh0/RrUQOXz8MG2dnZSQ8r+XQ0D Mvyz6BetTRtXAXCogRWOO29Oq4r73POIonZAJC2kr6AeOclnPhiK3rP5oNXnvKDPy5uC qNQtLaJrpojQ80eZ0YAdlulDnMeOINrmqMgCINGR2SzXZzUzO/qxck61VwnJdfViL17m Xtnw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date; bh=7tZtbYb4b1WkABBBL7k03zVW6CHmPIA8CRpYxtt3dU4=; b=QpcQBQb9u8+L8XZV5KHDSZUdSHd8/riOZ5aqS2UJeDjKVTaK3z1I6smPG6WYEao++c zcJyRMeOkM6ABD59a/NyCEulwUtC9JACm7SK92AIAF78luoMw95EDGqGzmQhQNLKzCj6 +vRGnIuhYJlxU+q8Iy1gnZbp78A91W+vyaaGylAHyzRv4N5O4BJz1vtdkHzRwv0shnLh LkGOt1SCMI7EKa3LyJqsHpHCER5Lv88tsqtpTmOskmA2nPww2FHKYnzjgyDvI8XTmvPg /mUev0spGZch4z2nKAm60Dhv+QcIQ7dAZdp8DXHxRkbj2trBJ5yccskrezP5qpipf+Lw NnoQ== X-Gm-Message-State: ACrzQf2ZFxuSUQpRAqwa4zWwE7600rhl2SuOEgEDHEQwQbh7Om0j3jgb UQqvxvKizIQ6y1ixsGEdGmd5HGmdHn//4Q== X-Google-Smtp-Source: AMsMyM4wo0CzzhLsz2BITZ7VZo82qOIK7eXiC+AwYqy4ZpaKh07ByJS2/cGX7S5FHQJxNgCEIm9aBIQq8sGnKg== X-Received: from loggerhead.c.googlers.com ([fda3:e722:ac3:cc00:24:72f4:c0a8:29a]) (user=jmattson job=sendgmr) by 2002:a05:6a00:1d9b:b0:541:1894:d5db with SMTP id z27-20020a056a001d9b00b005411894d5dbmr3278996pfw.78.1663304337274; Thu, 15 Sep 2022 21:58:57 -0700 (PDT) Date: Thu, 15 Sep 2022 21:58:30 -0700 In-Reply-To: <20220916045832.461395-1-jmattson@google.com> Mime-Version: 1.0 References: <20220916045832.461395-1-jmattson@google.com> X-Mailer: git-send-email 2.37.3.968.ga6b4b080e4-goog Message-ID: <20220916045832.461395-4-jmattson@google.com> Subject: [PATCH 3/5] KVM: x86: Report host's X86_FEATURE_NO_LMSLE in KVM_GET_SUPPORTED_CPUID From: Jim Mattson To: Avi Kivity , Babu Moger , Borislav Petkov , "Chang S. Bae" , Dave Hansen , "H. Peter Anvin" , Ingo Molnar , Joerg Roedel , Josh Poimboeuf , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Paolo Bonzini , Pawan Gupta , Peter Zijlstra , Sean Christopherson , Thomas Gleixner , Wyes Karny , x86@kernel.org Cc: Jim Mattson Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" EFER.LMSLE is not supported in a KVM guest if it is not supported on the underlying hardware. Inform the guest by exposing the host's value of X86_FEATURE_NO_LMSLE 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..b4975467d686 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -670,7 +670,7 @@ void kvm_set_cpu_caps(void) kvm_cpu_cap_set(X86_FEATURE_GBPAGES); =20 kvm_cpu_cap_mask(CPUID_8000_0008_EBX, - F(CLZERO) | F(XSAVEERPTR) | + F(CLZERO) | F(XSAVEERPTR) | F(NO_LMSLE) | F(WBNOINVD) | F(AMD_IBPB) | F(AMD_IBRS) | F(AMD_SSBD) | F(VIRT_SSBD) | F(AMD_SSB_NO) | F(AMD_STIBP) | F(AMD_STIBP_ALWAYS_ON) | __feature_bit(KVM_X86_FEATURE_PSFD) --=20 2.37.3.968.ga6b4b080e4-goog