From nobody Sat Dec 13 06:18:06 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass(p=reject dis=none) header.from=citrix.com ARC-Seal: i=1; a=rsa-sha256; t=1764673063; cv=none; d=zohomail.com; s=zohoarc; b=Okjwf9w1hSiMnU6wJ2OrkQY8+6OiiXysR1T5y2o2ipAQxvxh2C2/eM47yTQYf42pweQG3TctEQkrvI5sDByRlW671PFHF8/7zMyzfoPR2bYO/wvccvV5Jrjx3V3GpK+YQSsqjzoMbsfem+xKtieSm4rc8q3tar5XultlHdBf5Dc= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1764673063; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=Y3F0v8B5tAKK2oIAslcDrKA97kPJ4tzxA9EyhzU5Mmg=; b=nk/qohY4RQKefg9w82leXjwfh/MeP7hSY1wuVEarLfBBnuHQtQg8Mtg3bHNriicxRqXuYb9J0YNRalylDBRNT1Fihmr2f7FnT9J40oI9J+gIF816sQj5U/8/41lUaXeR6W2MEIV/rLTeDcjELu8AAMASssj4dlGvtd5Z5nH0jsk= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of lists.xenproject.org designates 192.237.175.120 as permitted sender) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org; dmarc=pass header.from= (p=reject dis=none) Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 17646730633763.0297757657625652; Tue, 2 Dec 2025 02:57:43 -0800 (PST) Received: from list by lists.xenproject.org with outflank-mailman.1176071.1500635 (Exim 4.92) (envelope-from ) id 1vQO4P-0007X5-6I; Tue, 02 Dec 2025 10:57:21 +0000 Received: by outflank-mailman (output) from mailman id 1176071.1500635; Tue, 02 Dec 2025 10:57:21 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1vQO4P-0007Wy-3f; Tue, 02 Dec 2025 10:57:21 +0000 Received: by outflank-mailman (input) for mailman id 1176071; Tue, 02 Dec 2025 10:57:20 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1vQO4O-0007Nh-HB for xen-devel@lists.xenproject.org; Tue, 02 Dec 2025 10:57:20 +0000 Received: from mail-wm1-x32f.google.com (mail-wm1-x32f.google.com [2a00:1450:4864:20::32f]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id aaccb00d-cf6d-11f0-980a-7dc792cee155; Tue, 02 Dec 2025 11:57:17 +0100 (CET) Received: by mail-wm1-x32f.google.com with SMTP id 5b1f17b1804b1-47789cd2083so31027195e9.2 for ; Tue, 02 Dec 2025 02:57:17 -0800 (PST) Received: from localhost.localdomain (host-92-26-102-188.as13285.net. [92.26.102.188]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4791164d365sm289825795e9.12.2025.12.02.02.57.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Dec 2025 02:57:16 -0800 (PST) X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: aaccb00d-cf6d-11f0-980a-7dc792cee155 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=citrix.com; s=google; t=1764673037; x=1765277837; darn=lists.xenproject.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=Y3F0v8B5tAKK2oIAslcDrKA97kPJ4tzxA9EyhzU5Mmg=; b=wKnwYpRB3LL7Mw6aTy/TF4x/TSSlJez7GcXwFLKDO34xr5rS6JC+R/fDWRDtfmoe8B JV99Br7g336lLv4z0xVfBnRh0Hy92iE4m9p0vZK3y64cBrI12+vgzCKy53BD7kutRbJW CCdrx3892q4Ayn7VPj7mZxsNJBxNlCVYCahjM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1764673037; x=1765277837; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=Y3F0v8B5tAKK2oIAslcDrKA97kPJ4tzxA9EyhzU5Mmg=; b=bLEHcKllmr52zWAMrcVAEjWLnY4dCrQUdJGSCYrB1q4jvnljOUYYAmVFw18tfWKCeR mKZ95j+Qe9lwwep03dmgan0hA/QMzCEDxPlHWCumV5FSguB0C9iCPdjurTftHrfY4aSw Fd+KojDGd1b0HQCSMQ1DogaYfw3hSLOAsm6C/XTA4M1TON/CQ2tWiVPRE0TjMFIHTm+2 w4Cel4auz5IWirLDDuWHOGXR4xG4sokBsPR25KRqYtYVE9AWlaJxa3jrwxp+syqcYBBs IRGNKMbfFSvGrpxUhfgnuy/H9j9zoDaiS0I0tPPcF7dZmTPXeUHwG1cPU6Zv8rmZX9UH BGFg== X-Gm-Message-State: AOJu0YxWmkjxoRaz0fNo58aRrBRgFfnWNSY049epcBUtAFVFuE14zcF+ MnGCAu/2p3PJ9VsThXoMpQJs4zWnZ4veJDoedTvMYzQ9oM8J3Bbh/bVIZZI2Bze5diOrOg8rGtz r9PE5 X-Gm-Gg: ASbGnctGLMiduUcrsz6yYaRKm0keiGrQ9rbTdF1SwGuA3NU3M7ChKfYpoROB7To+xhy BJRc+jZ1FT/BQ01ZB7bbthxqpWdPTluIaMzjkKYP92F0KVQgygRzZTy/WcRjNsyoMFCGBf5x5oo 8otgCobqmZTdwL9xREZUnro8Q0gAtpTMdKrjKotU0KBX2sRvy7Bo76mFnhuUFJwCvYX4aAUwZ64 F5S1KnVckVROk51gLsjSPbLY+PZ+36begO2vfMtQG+wFjqrPcndPrjK528HWNoAljxOcWco+cfE T7jB1GZm2MSdf3/dkmXNkgu0BDh5G23yXONbFkjJjgBLGWWVWtQZZzksXO0KA04apq41MyFd5jb kYX0cBJOyT/cI5o/KQBHQ3zgelcuQe23NMM9TEMmetSSzYkHpf3b0nLw5dgAf1INdshM3UEjLCb C5BJtZ7Hp+4iOIQE5eqTq6kYXySarM/3pkXd14rvxoziT6Cr9r9ppewIlIJYcxeA== X-Google-Smtp-Source: AGHT+IEaso1pVFzc+d42WVIjUWuuXqzVjN0XMUbvo93FY2+XATOdq6XNtm++GWgxF/aHqfUMAshfCA== X-Received: by 2002:a05:600c:19ca:b0:477:a978:3a7b with SMTP id 5b1f17b1804b1-477c1143073mr407258435e9.22.1764673036572; Tue, 02 Dec 2025 02:57:16 -0800 (PST) From: Andrew Cooper To: Xen-devel Cc: Andrew Cooper , Jan Beulich , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= Subject: [PATCH 2/3] x86/amd: Exclude K8 RevD and earlier from levelling Date: Tue, 2 Dec 2025 10:57:09 +0000 Message-Id: <20251202105710.1472927-3-andrew.cooper3@citrix.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20251202105710.1472927-1-andrew.cooper3@citrix.com> References: <20251202105710.1472927-1-andrew.cooper3@citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @citrix.com) X-ZM-MESSAGEID: 1764673065930019200 Between RevD and RevE silicon, the feature MSRs moved location. This prope= rty is highlighted by the suggested workaround for Erratum #110 which gives the two different MSRs for the extended feature leaf. The other feature MSRs are not given and while they're easy enough to figure out I don't have any K8's to test the result with. Signed-off-by: Andrew Cooper --- CC: Jan Beulich CC: Roger Pau Monn=C3=A9 --- xen/arch/x86/cpu/amd.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/xen/arch/x86/cpu/amd.c b/xen/arch/x86/cpu/amd.c index 4dc9157836ad..73f43b0f9174 100644 --- a/xen/arch/x86/cpu/amd.c +++ b/xen/arch/x86/cpu/amd.c @@ -117,10 +117,12 @@ static void __init noinline probe_masking_msrs(void) /* * First, work out which masking MSRs we should have, based on * revision and cpuid. + * + * Fam11h doesn't support masking at all. FamFh RevD and earlier had + * the feature MSRs in different locations, as can be seen by the + * suggested workaround for Erratum #110, docID 25759. */ - - /* Fam11 doesn't support masking at all. */ - if (c->x86 =3D=3D 0x11) + if (c->family =3D=3D 0x11 || (c->family =3D=3D 0xf && c->model < 0x20)) return; =20 cpuidmask_defaults._1cd =3D --=20 2.39.5