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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 5C46FC3600B for ; Thu, 27 Mar 2025 10:55:21 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.928972.1331610 (Exim 4.92) (envelope-from ) id 1txktG-0004iQ-Ow; Thu, 27 Mar 2025 10:55:14 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 928972.1331610; Thu, 27 Mar 2025 10:55:14 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1txktG-0004iJ-ME; Thu, 27 Mar 2025 10:55:14 +0000 Received: by outflank-mailman (input) for mailman id 928972; Thu, 27 Mar 2025 10:55:14 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1txktG-0004iB-8t for xen-devel@lists.xenproject.org; Thu, 27 Mar 2025 10:55:14 +0000 Received: from mail-pl1-x633.google.com (mail-pl1-x633.google.com [2607:f8b0:4864:20::633]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id f4d69d4a-0af9-11f0-9ea3-5ba50f476ded; Thu, 27 Mar 2025 11:55:13 +0100 (CET) Received: by mail-pl1-x633.google.com with SMTP id d9443c01a7336-224191d92e4so15880805ad.3 for ; Thu, 27 Mar 2025 03:55:13 -0700 (PDT) Received: from localhost ([84.78.159.3]) by smtp.gmail.com with UTF8SMTPSA id d9443c01a7336-227811b2be4sm125614485ad.126.2025.03.27.03.55.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 27 Mar 2025 03:55:10 -0700 (PDT) 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: f4d69d4a-0af9-11f0-9ea3-5ba50f476ded DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=citrix.com; s=google; t=1743072911; x=1743677711; darn=lists.xenproject.org; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to; bh=oZVIzZTshyRyX2vdlYGGUIrTH089iaLhOCPmsd6J5qA=; b=h9OOORSNYWdXiZvCRwh+5Iza0mVv+GUzND8JNDUuiIEnFbNMyX7+uclfdMx4EfPzpx mSJy2x89XG9qBhBIlv2zpw3Ptz5tvodCYJ/UA4XT2zDM176Cg1Og9weZop0AOZblB8G2 t9pgUvke92YFuqNTOEeaj2Pr+Lm/YDi82LERg= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1743072911; x=1743677711; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=oZVIzZTshyRyX2vdlYGGUIrTH089iaLhOCPmsd6J5qA=; b=eqZiHlsj8SelIS04CyQ6hAhnO65xvUwPMl3c8r6QWea4c3xiNx1szQe91FmmarrIkY cckxUS/FQ2l1BnOdwXQUT5gA2qPPGyMFbqzw2CGiDZc/oHhU7l4g7MXM7Q9W7RXp3CDe 1kChM/1y1qV06+BZE1z95tmXpDvRxf2LkE6IEG8BHQYS1ngQQvo49xG8RAhpMm9PBSy4 IiBFd+lL868meKLcE+Cie/xbRXMRbwGI6ZkYw5avTtVce08B1shccTDya6xy6pP5DqpC /nTyC9H+8jPWmAn5IGiWZGdPs8/xefagydoR7vWW2xm5QcE1pHaJW5ZvE6SADAJ1Wn0Y 9j5g== X-Gm-Message-State: AOJu0YxnZb6VQVXfg9a4lshb1C25YtV6CQuFfIc/9styYLPb3MVAgrYZ GfFEMRA391dpCjMwceI1uDy5BBLvdes3QpAJZB5lsmUadQKo+tLRrEr3BUNn2Pl/tD/Pd6WSot1 q X-Gm-Gg: ASbGnctZeLUMUGvHMTsKo5Hy2LQBWG+zR+V1bh5z+9k5p/hcsUTMLBD6W++i+DCori1 WVDUNOBBCTuZiv+wdtH79Qnpc305WbGJ9YiocvIyyDdOqFknMKRvgIVrU1lK7winb1yz38WInzp vS3DfUKnlzBxtKdtKB5TKwi3J/BJ0p87YL2gt/vwJyDKSjPKG4O7XQVOnN7DkzanWYegf2IA2+f kt4ZMMw8jWBYSDMMABIoQGUov0NF00tfDntzZ8Umpp7KO/i8aPnP/rM+Q+cxwFhvrXQdERpLpKr g3HxImwrM2xlofZacfrqOazPSA7k1JDh3sF1n6TfxfRZjf9bBQ== X-Google-Smtp-Source: AGHT+IGExd2sIbSmZzKtam6I8zd684oNOHYyg8WBy0kkAAad7bdPpKA77vQp192QC66mA5wkY6OAXA== X-Received: by 2002:a17:902:f646:b0:224:f12:3735 with SMTP id d9443c01a7336-228048c8674mr53388225ad.31.1743072911248; Thu, 27 Mar 2025 03:55:11 -0700 (PDT) Date: Thu, 27 Mar 2025 11:55:06 +0100 From: Roger Pau =?utf-8?B?TW9ubsOp?= To: Jan Beulich Cc: "xen-devel@lists.xenproject.org" , Andrew Cooper Subject: Re: [PATCH] x86/CPU: don't hard-code MTRR availability Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Tue, Mar 25, 2025 at 08:18:11AM +0100, Jan Beulich wrote: > In particular if we're running virtualized, the underlying hypervisor > (which may be another Xen) may not surface MTRRs, and offer PAT only. > > Fixes: 5a281883cdc3 ("Hardcode many cpu features for x86/64 -- we know 64-bit") > Signed-off-by: Jan Beulich Acked-by: Roger Pau Monné Thanks, Roger.