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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no 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 CCCF3C432BE for ; Mon, 30 Aug 2021 17:41:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BC325604AC for ; Mon, 30 Aug 2021 17:41:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238290AbhH3RmX (ORCPT ); Mon, 30 Aug 2021 13:42:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37816 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238117AbhH3RmT (ORCPT ); Mon, 30 Aug 2021 13:42:19 -0400 Received: from mail.skyhub.de (mail.skyhub.de [IPv6:2a01:4f8:190:11c2::b:1457]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F196DC06175F for ; Mon, 30 Aug 2021 10:41:25 -0700 (PDT) Received: from zn.tnic (p200300ec2f0b3b00d8cdf5b388faf601.dip0.t-ipconnect.de [IPv6:2003:ec:2f0b:3b00:d8cd:f5b3:88fa:f601]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 90DFF1EC03FE; Mon, 30 Aug 2021 19:41:20 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1630345280; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=I7AOGAytPqE7C8qa9A/aHAcVwJiDOLW+1xpi4wixpbo=; b=MBhrqdBNQwgaRZ1UuFK/lo3Qy8G/DusLMbsfzRAVuRMBtUhdLvYnk/0ioefqyJziN5w3AB K/LfbaR2hd3FQmIeQqWktj5ceDO6L2+vTg12whSPoq15XpWTNkJ8SrNgMNniPdAwFfAhj6 CSP5laALdRZrPKKMHF3AA+Ma0QzTlVI= Date: Mon, 30 Aug 2021 19:41:57 +0200 From: Borislav Petkov To: Len Brown Cc: "Chang S. Bae" , Andy Lutomirski , Thomas Gleixner , Ingo Molnar , X86 ML , "Brown, Len" , Dave Hansen , thiago.macieira@intel.com, "Liu, Jing2" , "Ravi V. Shankar" , Linux Kernel Mailing List Subject: Re: [PATCH v9 12/26] x86/fpu/xstate: Use feature disable (XFD) to protect dynamic user state Message-ID: References: <20210730145957.7927-1-chang.seok.bae@intel.com> <20210730145957.7927-13-chang.seok.bae@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 24, 2021 at 06:21:23PM -0400, Len Brown wrote: > MSR_IA32_XFD and MSR_IA32_XFD_ERR are architectural. > > (which is why they follow the convention of having an "IA32" in their name) Where is that official statement I can refer to that says that MSRs with "IA32" in the name are architectural? Perhaps that section of the SDM: "2.1 ARCHITECTURAL MSRS" ? In any case, those MSRs are not there yet, maybe they need to trickle from the ISA to the SDM docs at some point first. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette