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 E3921C433FE for ; Tue, 15 Mar 2022 13:31:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348721AbiCONci (ORCPT ); Tue, 15 Mar 2022 09:32:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49574 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1348699AbiCONcb (ORCPT ); Tue, 15 Mar 2022 09:32:31 -0400 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2AA6E51307; Tue, 15 Mar 2022 06:31:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647351079; x=1678887079; h=message-id:date:mime-version:to:cc:references:from: subject:in-reply-to:content-transfer-encoding; bh=l3FFNBnyruc55ZkrcTRN2YwGaSvieHvJ8ZAP2IQOlf0=; b=nt3d/Yv5PNM34fQDOrIjj1zKC6ko900JLfWDS08ZV8mE8WPpiJFvAN2Y M2kQTl4jdYJjnN0n+5tS87wqzhEZQ/dZb2PcfGFJKM0cQ+a29tPeHdXR8 evcT3FGHS4TnkpQuV77XrfWBdouRgbKDVXhRrFBQA9DSt62abKzsRuOMN ydI/YI6Tvoo+FS5GOqiujsyVHp80mDmBzd1ONrR/jPgGMTPt7K0XAx6DS h657en2XHfoMoed+4rN8RE8B3kHJkGVELxR6imMpDAJkDSgeO6G+ncfDH AWnyo0p93iEsC8+yqW0xbscSDV0A4vIRdZN4IAQH04wB82SEOzUS4ga3s A==; X-IronPort-AV: E=McAfee;i="6200,9189,10286"; a="281069239" X-IronPort-AV: E=Sophos;i="5.90,183,1643702400"; d="scan'208";a="281069239" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Mar 2022 06:30:53 -0700 X-IronPort-AV: E=Sophos;i="5.90,183,1643702400"; d="scan'208";a="549596268" Received: from rgatlin-mobl.amr.corp.intel.com (HELO [10.251.10.152]) ([10.251.10.152]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 15 Mar 2022 06:30:52 -0700 Message-ID: <314aea98-7054-09aa-042d-a91796dcbd43@intel.com> Date: Tue, 15 Mar 2022 06:30:44 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Content-Language: en-US To: Isaku Yamahata , Alejandro Jimenez Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, x86@kernel.org, linux-kernel@vger.kernel.org, thomas.lendacky@amd.com, brijesh.singh@amd.com, kirill.shutemov@linux.intel.com, hpa@zytor.com, pbonzini@redhat.com, seanjc@google.com, srutherford@google.com, ashish.kalra@amd.com, darren.kenny@oracle.com, venu.busireddy@oracle.com, boris.ostrovsky@oracle.com, kvm@vger.kernel.org References: <20220309220608.16844-1-alejandro.j.jimenez@oracle.com> <8498cff4-3c31-f596-04fe-62013b94d7a4@intel.com> <746497ff-992d-4659-aa32-a54c68ae83bf@oracle.com> <20220314224346.GA3426703@ls.amr.corp.intel.com> From: Dave Hansen Subject: Re: [RFC 0/3] Expose Confidential Computing capabilities on sysfs In-Reply-To: <20220314224346.GA3426703@ls.amr.corp.intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/14/22 15:43, Isaku Yamahata wrote: > xfam_fixed0 fixed-0 value for TD xfam value as a > hexadecimal number with the "0x" prefix. > xfam_fixed1 fixed-1 value for TD xfam value as a > hexadecimal number with the "0x" prefix. I don't think we should be exporting things and creating ABI just for the heck of it. These are a prime example. XFAM is reported to the guest in CPUID. Yes, these may be used to help *build* XFAM, but userspace doesn't need to know how XFAM was built. It just needs to know what features it can use.