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=-3.8 required=3.0 tests=BAYES_00, 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 DA99FC2B9F4 for ; Fri, 25 Jun 2021 15:46:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id BA35B6195D for ; Fri, 25 Jun 2021 15:46:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230071AbhFYPtE (ORCPT ); Fri, 25 Jun 2021 11:49:04 -0400 Received: from mga12.intel.com ([192.55.52.136]:39907 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229949AbhFYPtE (ORCPT ); Fri, 25 Jun 2021 11:49:04 -0400 IronPort-SDR: Aa2U7ZbjrdpEnaziMS3lGxY6Eux8kqcioK3CAqMmGclFy6LFsebLrfnNrjkfOf3UqeyQMF9tRi nlBgtZ/x7NHA== X-IronPort-AV: E=McAfee;i="6200,9189,10026"; a="187381866" X-IronPort-AV: E=Sophos;i="5.83,299,1616482800"; d="scan'208";a="187381866" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jun 2021 08:46:43 -0700 IronPort-SDR: naYMx/2TuUTBUpSSAraBxCgF3wfQbSHEMQLlxRd9OQDOkMswUSaqNBbXUMJPpPzxc941VjHmG9 quwb4ls5X/2A== X-IronPort-AV: E=Sophos;i="5.83,299,1616482800"; d="scan'208";a="557733938" Received: from agluck-desk2.sc.intel.com (HELO agluck-desk2.amr.corp.intel.com) ([10.3.52.146]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jun 2021 08:46:42 -0700 Date: Fri, 25 Jun 2021 08:46:41 -0700 From: "Luck, Tony" To: Andy Lutomirski Cc: Thomas Gleixner , Borislav Petkov , "Yu, Fenghua" , linux-kernel , x86 , "iommu@lists.linux-foundation.org" , Ingo Molnar , H Peter Anvin , Jean-Philippe Brucker , Christoph Hellwig , Peter Zijlstra , David Woodhouse , Lu Baolu , "Hansen, Dave" , Randy Dunlap , "Raj, Ashok" , "Pan, Jacob jun" , "Jiang, Dave" , "Mehta, Sohil" , "Shankar, Ravi V" Subject: Re: [PATCH] x86/cpufeatures: Force disable X86_FEATURE_ENQCMD and remove update_pasid() Message-ID: <20210625154641.GA1206684@agluck-desk2.amr.corp.intel.com> References: <1600187413-163670-1-git-send-email-fenghua.yu@intel.com> <1600187413-163670-10-git-send-email-fenghua.yu@intel.com> <87mtsd6gr9.ffs@nanos.tec.linutronix.de> <87y2bv438p.ffs@nanos.tec.linutronix.de> <36866b38ec92425b879881a88acf547b@intel.com> <7d8788a9e04d4901a03bcea11e8e842b@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 09, 2021 at 04:34:31PM -0700, Andy Lutomirski wrote: > On 6/9/21 10:32 AM, Luck, Tony wrote: > >>> I've told Fenghua to dig out the previous iteration of this patch where > >>> the plan was to lazily fix the PASID_MSR in other threads in the #GP > >>> handler. > >> > >> Blech. Also this won't work for other PASID-like features. > >> > >> I have a half-written patch to fix this up for real. Stay tuned. > > > > Andy: Any update on this? > > > > -Tony > > > > Let me try to merge my pile with tglx's pile and come up with something > halfway sane. Looks like Thomas' pile is done (well done enough to be queued in TIP). Can we see your "pile" soon? -Tony