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 47B97C25B08 for ; Wed, 17 Aug 2022 15:35:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236766AbiHQPe5 (ORCPT ); Wed, 17 Aug 2022 11:34:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52040 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233350AbiHQPex (ORCPT ); Wed, 17 Aug 2022 11:34:53 -0400 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9747FC62 for ; Wed, 17 Aug 2022 08:34:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1660750492; x=1692286492; h=date:from:to:cc:subject:message-id:references: in-reply-to:mime-version; bh=k7unP8JqfUATY8myPeuAfmP2uPdMOrj6Q32GSgvuRY0=; b=gdOMTtOeMrjHeWmLyvxiJez2W55gCxfZznKQ8Ttk0tTKpO9yRw7b7w5O PfiKQ1bitqZY4WfMHqYS8H0Qa7bomciNI47CN9yXOXFp18IrcpwkRPsUn jW0dEBc/hHgyZBnmpnL8b/2LrUKV3VM/wtVwQa1tE7aGyIBRhEmkDACcX HjgN6kwz6v+d0+D6At3Oll5bMerpczql9Xa01+Um9F8bTUSCjVTuDUOlU NuHpJT2VXXIMWwYLLcFm5SqTmRnBx1uI5CouSZ3rNWOy22k5IRqrytOvU ccMHayIU/+8HogbLGjYMqCYPJHqnvYTlG4begEEmnz3/WjJaDfpkzzcHH Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10442"; a="378814814" X-IronPort-AV: E=Sophos;i="5.93,243,1654585200"; d="scan'208";a="378814814" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Aug 2022 08:29:25 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.93,243,1654585200"; d="scan'208";a="607471433" Received: from orsmsx603.amr.corp.intel.com ([10.22.229.16]) by orsmga002.jf.intel.com with ESMTP; 17 Aug 2022 08:29:25 -0700 Received: from orsmsx607.amr.corp.intel.com (10.22.229.20) by ORSMSX603.amr.corp.intel.com (10.22.229.16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Wed, 17 Aug 2022 08:29:25 -0700 Received: from orsedg603.ED.cps.intel.com (10.7.248.4) by orsmsx607.amr.corp.intel.com (10.22.229.20) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28 via Frontend Transport; Wed, 17 Aug 2022 08:29:25 -0700 Received: from NAM10-BN7-obe.outbound.protection.outlook.com (104.47.70.106) by edgegateway.intel.com (134.134.137.100) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2375.28; Wed, 17 Aug 2022 08:29:24 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=IjMzd54BbXkK1p19qeiCVMy/cdNvmq3NzZPvEUWlxSpgB5TksF6p1A8HoDdohU5BaMvC5upTAExemFBjLJYhINLXhOqxQkHyI9YyOYQNU4jltj/pvMbV7M5ufdLIlbl9YTqlT7R73Jju9+eAPjHha7xb+QhbXkSP5fag+slf4XKj2q7jAHdnxLo55kZ6rBz7gikZ3DY+rzhs6eNMElOZ7JiUVDvErSrKDTRZXtlvR5xAVS10Vc5lHBLscwFCSZp0ZVGz0nl8NOaz6+YtffE+Gw9LZbE4P0UQbyXlk9CQQwfZZG7CpTRkQS4633YMPHEOCdlNqc3Me/L/othChgOZtw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=Esle9MfhLaAdorcuH+c5mjdx7WIiCt3NDLFKqE5DhwA=; b=agzfxpEMW0ChnSG8AxWd7NysuXLghojlZc1YlTaKMTjVQqua7XB2a177u5kN7Ko3RoJpWsa1ZGRYro/i9MV1BHooWnKmNfK1dIou+zYNENQa8vQkw71gwo1sL0Bt35QLOpEhRZot0ooCTPG2Kb72ppV6ZUt2/XiS6a03mLs6Rr6+hqU1H4/QcE8XjdP2J4EOGJ3Un422S07QnmnXMQ0k9TJ02Twb3b4PsfvLLJ+JVd5PHjl7CW5wFZUEkVwkIlKWw5qN7lDHW77rivbHyr5nkGfMcf7XvrNR+hcZR0qr5dNnSrUhFKqDNIMCrAqZCs5czTLaaIDfzWlX3vKoQuZNLw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com; dkim=pass header.d=intel.com; arc=none Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=intel.com; Received: from SJ1PR11MB6201.namprd11.prod.outlook.com (2603:10b6:a03:45c::14) by DM6PR11MB4740.namprd11.prod.outlook.com (2603:10b6:5:2ad::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5525.10; Wed, 17 Aug 2022 15:29:23 +0000 Received: from SJ1PR11MB6201.namprd11.prod.outlook.com ([fe80::10da:929a:73eb:40ad]) by SJ1PR11MB6201.namprd11.prod.outlook.com ([fe80::10da:929a:73eb:40ad%6]) with mapi id 15.20.5525.017; Wed, 17 Aug 2022 15:29:22 +0000 Date: Wed, 17 Aug 2022 15:29:04 +0000 From: Ashok Raj To: Borislav Petkov CC: Ashok Raj , X86 ML , "Andrew Cooper" , LKML , =?utf-8?Q?=C8=98tefan?= Talpalaru , Ashok Raj Subject: Re: [PATCH] x86/microcode/AMD: Attempt applying on every logical thread Message-ID: References: <20220814120026.16118-1-bp@alien8.de> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: X-ClientProxiedBy: SJ0PR03CA0004.namprd03.prod.outlook.com (2603:10b6:a03:33a::9) To SJ1PR11MB6201.namprd11.prod.outlook.com (2603:10b6:a03:45c::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: d1f35d69-0560-4864-7bd8-08da806542ce X-MS-TrafficTypeDiagnostic: DM6PR11MB4740:EE_ X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SJ1PR11MB6201.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230016)(7916004)(346002)(39860400002)(376002)(366004)(396003)(136003)(8676002)(316002)(4326008)(66476007)(54906003)(33716001)(66556008)(66946007)(2906002)(44832011)(8936002)(38100700002)(82960400001)(6916009)(5660300002)(86362001)(186003)(41300700001)(6486002)(6506007)(6666004)(966005)(26005)(6512007)(83380400001)(478600001)(9686003);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?sKjFuuMsWlHUPRKSlm/JR3109PkjixHnklYwj9Yw2rpXufQot//IOOZRjBGt?= =?us-ascii?Q?5xwBksTI/GLshGGKy9ha63F5qzWvFd7TLy2EpVZyF70bafUpscjOt6uw5E2t?= =?us-ascii?Q?eR3Ji6AUSbKagpeniAJlan78thKiITAZ07Uujxb4i45r4G41uaY4Pn0RQ6CA?= =?us-ascii?Q?VRAkkq7CEMzepnAN3GNJOg3CXTpXLOYHPElBOc2wISD/CeS7nEEbxup/KZ8X?= =?us-ascii?Q?G02myvtX0Yd3Mo6RbSdyvdewUT3ouLM9LCzql2y9Ad5HJsU5ZaPNpq2XWGdv?= =?us-ascii?Q?9rwq4wS4D6cT23VvbjpDYen3lm9SVFJEZcDpaW18PL3jEht1YwXjOtsRWz//?= =?us-ascii?Q?d7k1qlXNLZPtUJ4cYzlV5AaMPGL2N6W1C95I633o2GGMjHjpNfHH0pDwdes3?= =?us-ascii?Q?nvrlszOWXdiDtICQXOBXsDxNALH4bKoZVHI/50LZ/tMLEmxWZpq3l19x2Tmm?= =?us-ascii?Q?+OvY8CkS59A24eD6Ji12BjalUEz2esjr4uHBB9ia9JHC7kuTOxfrBXdjFRwU?= =?us-ascii?Q?bQylYGjoF4wOuQQZej36xjXlvl7NrH8wykQCoOlbS5Tv8YFf9Dt4wGPXA29s?= =?us-ascii?Q?gj9GlG0E71mS+K7hjcYfv4gViRSY+zlQIbF5Qlg6VcIgNJ9CdbJvPJWEadUN?= =?us-ascii?Q?TBb7pdAsS0Z8ilzJdd5PISy+DZKSk1ocHAI4uFjGNUsHgmCL0zL3htkWL0+V?= =?us-ascii?Q?LLVMpGdFYnzYfOxuWC2TMO1DkjQeoaEXwNpI+9ncvOW4HybXaNSzUkYmoQab?= =?us-ascii?Q?tOEwZsq0Aii0oCtzCkBJbPddrFwNTdJju6pzQ2uPAapCpR5+Vrf1lJBe/HgG?= =?us-ascii?Q?pkuNlpSe5mUx6CnCznZHmR+6IEMp0KpfRCB+VTkPdhQJ/h6zdxyLhJZV/zPt?= =?us-ascii?Q?Rfu4BkXSIH/DchqYk/6MsTSNCzbmQcq1F8wc32b2zJJLSGy/QSVZ/dg6fljB?= =?us-ascii?Q?2/PHltoxSPjWwInhco2DzZy16IFlWFlP9oWaT/oN9mCFJRoJoEBaOalZo7F9?= =?us-ascii?Q?4GymWSyZgC0XQVP8zZ7lRllhGZlAn4wQLhp0ElqrKYzJtOLauE4LaUKaKfSu?= =?us-ascii?Q?du8QdAhrwxujKFBxv8OrjMToM3UF9QhegFsfyfRjOOROXrlmy/srB3AvAT9H?= =?us-ascii?Q?hB2VTeDB3QuJjxLtUVGxq5lmuj2685ma+WVfTALWW7GDj0TssAzGC9bJZb++?= =?us-ascii?Q?j4FkWStoLjFcuv/zCSp8maojpI8J4HvCKgAnhSGW/X9orgwsSL2PXM0gRkOf?= =?us-ascii?Q?24mxAFOjJ4esK5gjnV/Qys0fEKHb7hkcdgQ8IxkpNZqD0DGnDk6INzaLp5JZ?= =?us-ascii?Q?Qg0Zv4G97Ykx+3nB4BBh5hySjweUMOsaE5r/ogb653w+LQhvbzxDTgtADITf?= =?us-ascii?Q?T5yNYnxvM13GR1d9PDGUzqYdDwcMpSCbuY52RKoj4oBnbqS7ARnNWOH4nUVe?= =?us-ascii?Q?WS06Yy36VCMMTzR51MD2KJvbvL2kQ4TuaGzN7zMOTMXgoGHLoklSGUsi9fPW?= =?us-ascii?Q?B8ZUY+iSy9PkMsI32+HdawYcbZvEuy180YrsdqYs4aHwjMHFGoDKfzqkkko+?= =?us-ascii?Q?trDLcK/uFjs/VEOOYff5e82DrD78LcxAGdwGImeHvMQLtlcgg3NPsDtYgL4Y?= =?us-ascii?Q?4g=3D=3D?= X-MS-Exchange-CrossTenant-Network-Message-Id: d1f35d69-0560-4864-7bd8-08da806542ce X-MS-Exchange-CrossTenant-AuthSource: SJ1PR11MB6201.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Aug 2022 15:29:22.8789 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: NuPKqEj/YOEvUTtU4cyt0f1Aemqk8GMIYiMh31hP+KDRaG+Gr7n+BivQvwRyKixzbnSEmlYhp8CWD64Pw/cDzg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR11MB4740 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Aug 17, 2022 at 04:23:24PM +0200, Borislav Petkov wrote: > On Wed, Aug 17, 2022 at 12:12:05PM +0000, Ashok Raj wrote: > > Instead of doing a complete hack, > > What complete hack?! What I meant was the patch removed any and all revid checks *completely* Instead of even limiting to == checks. Once you do that "in spirit" its the same end goal. Isn't it? Although it might be required for a completely different reason. > > > could we maybe revive what we attempted > > in 2019? At a minimum it will work for both architectures. > > > > https://lore.kernel.org/lkml/1567056803-6640-1-git-send-email-ashok.raj@intel.com/ > > echo 2 >... - now that's a hack. Its all in the eye of the beholder :-) I didn't mean in any way to bring back the echo 2. What ever you think is suitable to enable this is fine. > > If you wanna use the kernel for testing your hw, use a local patch. Not > expose it to people and then have me debug all kind of strange lockups. So forget the hardware testing part. This is a complex flow for late-load and how can we get more people to test it today in the community? Do we have a more scalable way to support it today? This is similar to XEN supporting, ucode=allow_same, there is precedence. Doing that is just like having a built-in self-test for microcode loading. I think there is value in enabling it for x86. Cheers, Ashok