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 0DF73C433F5 for ; Fri, 11 Feb 2022 20:04:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353081AbiBKUEw (ORCPT ); Fri, 11 Feb 2022 15:04:52 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:49136 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229967AbiBKUEu (ORCPT ); Fri, 11 Feb 2022 15:04:50 -0500 Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6391CCE4 for ; Fri, 11 Feb 2022 12:04:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1644609888; x=1676145888; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=2ZlVaDtKfVX9/LVBJ9h/jToT61g2FD0JlwafMGgpbqg=; b=fNiM2WitKA+ZlJc2bhg02nzuLeggRFNNZb+ZGhK/jUSmgLJUASDtmV5Y ESD/Nrwnx54golHrkzSrf8obyMhhKeuKW/cC6U/lKttjotIvyKhWvZKrX FcvIqXyA34aWyt/rMqh/wKxVEBXXvHiu8Zp6+nvMyqPsRB9v/yvo9638P rnXMKUmx/tC+cjm+qrkkcM0bie5RMFc6RNziOb2z7WbJFjDZnVd7R3A9c wnpW7ZctMo2XJDJrGG6P7L+RjFE8vBkbBjkp4sonRFkkUR5U9drtv7BAb Pc40CimyYKevzoI9mOz/3+w6NDr4p4Bu35yebZedg3en65jxgGRmTZlbX w==; X-IronPort-AV: E=McAfee;i="6200,9189,10255"; a="310537804" X-IronPort-AV: E=Sophos;i="5.88,361,1635231600"; d="scan'208";a="310537804" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Feb 2022 12:04:47 -0800 X-IronPort-AV: E=Sophos;i="5.88,361,1635231600"; d="scan'208";a="702223218" Received: from otcwcpicx3.sc.intel.com ([172.25.55.73]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Feb 2022 12:04:47 -0800 Date: Fri, 11 Feb 2022 12:04:41 -0800 From: Fenghua Yu To: Thomas Gleixner , Dave Hansen , Ingo Molnar , Borislav Petkov , Peter Zijlstra , Andy Lutomirski , Tony Luck , Lu Baolu , Joerg Roedel , Josh Poimboeuf , Jacob Pan , Ashok Raj , Ravi V Shankar Cc: iommu@lists.linux-foundation.org, x86 , linux-kernel Subject: Re: [PATCH v4 00/11] Re-enable ENQCMD and PASID MSR Message-ID: References: <20220207230254.3342514-1-fenghua.yu@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220207230254.3342514-1-fenghua.yu@intel.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Thomas, On Mon, Feb 07, 2022 at 03:02:43PM -0800, Fenghua Yu wrote: > Problems in the old code to manage SVM (Shared Virtual Memory) devices > and the PASID (Process Address Space ID) led to that code being > disabled. > > Subsequent discussions resulted in a far simpler approach: > > 1) PASID life cycle is from first allocation by a process until that > process exits. > 2) All tasks begin with PASID disabled > 3) The #GP fault handler tries to fix faulting ENQCMD instructions very > early (thus avoiding complexities of the XSAVE infrastructure) > > Change Log: > v4: > - Update commit message in patch #4 (Thomas). > - Update commit message in patch #5 (Thomas). > - Add "Reviewed-by: Thomas Gleixner " in patch #1-#3 > and patch #6-#9 (Thomas). > - Rebased to 5.17-rc3. A friendly reminder. Any comment on this series? Will you pick up this series in tip? Thank you very much! -Fenghua