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=-2.0 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 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 0B6E1C38A30 for ; Sat, 18 Apr 2020 13:46:45 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C980D2054F for ; Sat, 18 Apr 2020 13:46:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=xen.org header.i=@xen.org header.b="Daj1JSwm" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C980D2054F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=xen.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1jPnnV-00024r-Co; Sat, 18 Apr 2020 13:46:17 +0000 Received: from all-amaz-eas1.inumbo.com ([34.197.232.57] helo=us1-amaz-eas2.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1jPnnU-00024m-05 for xen-devel@lists.xenproject.org; Sat, 18 Apr 2020 13:46:16 +0000 X-Inumbo-ID: f88bb024-817a-11ea-8e72-12813bfff9fa Received: from mail.xenproject.org (unknown [104.130.215.37]) by us1-amaz-eas2.inumbo.com (Halon) with ESMTPS id f88bb024-817a-11ea-8e72-12813bfff9fa; Sat, 18 Apr 2020 13:46:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=In-Reply-To:Content-Type:MIME-Version:References:Message-ID :Subject:Cc:To:From:Date:Sender:Reply-To:Content-Transfer-Encoding:Content-ID :Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To: Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe :List-Post:List-Owner:List-Archive; bh=spdwGc0KgnbRB5gjjv05TunodJTNA0vnhyFB/SZ8hrM=; b=Daj1JSwmsZqnIW0W0iraqLtt1V VmRwPPtaAbZ0cQOKtADA6Q/EpooifLRgY1hFyRHbSPZyfv+UvTsw1z8/XloSkdLTzWlwf9tCdUPAe xYI+C9batrRQvfpKIl/Ud+vQYus0Koz1fwgbZNLZtLpAcMlAwRG9BfxgFET/zsYZ4P38=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1jPnnS-00022e-0U; Sat, 18 Apr 2020 13:46:14 +0000 Received: from 44.142.6.51.dyn.plus.net ([51.6.142.44] helo=debian) by xenbits.xenproject.org with esmtpsa (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1jPnnR-0006i4-NO; Sat, 18 Apr 2020 13:46:13 +0000 Date: Sat, 18 Apr 2020 14:46:10 +0100 From: Wei Liu To: Andrew Cooper Subject: Re: [PATCH 0/3] x86/pv: Start to trim 32bit support Message-ID: <20200418134610.hlqcj7v3zoobjrvv@debian> References: <20200417155004.16806-1-andrew.cooper3@citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200417155004.16806-1-andrew.cooper3@citrix.com> User-Agent: NeoMutt/20180716 X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Juergen Gross , Xen-devel , Wei Liu , Jan Beulich , Roger Pau =?utf-8?B?TW9ubsOp?= Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" On Fri, Apr 17, 2020 at 04:50:01PM +0100, Andrew Cooper wrote: > Downstreams may want this for either security or performance reasons. Offer > some options, and take advantage of some of the very low hanging fruit it > offers. > > There is plenty more incremental cleanup which can be done at a later point. > > Andrew Cooper (3): > x86/pv: Options to disable and/or compile out 32bit PV support > x86/pv: Short-circuit is_pv_{32,64}bit_domain() in !CONFIG_PV32 builds > x86/pv: Compile out compat_gdt in !CONFIG_PV builds Reviewed-by: Wei Liu