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=-2.2 required=3.0 tests=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 61AEDC433DF for ; Tue, 26 May 2020 11:59:17 +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 32B4120663 for ; Tue, 26 May 2020 11:59:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 32B4120663 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=citrix.com 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 4.92) (envelope-from ) id 1jdYEa-0001tC-2a; Tue, 26 May 2020 11:59:04 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1jdYEZ-0001t6-Gu for xen-devel@lists.xenproject.org; Tue, 26 May 2020 11:59:03 +0000 X-Inumbo-ID: 4719d3a2-9f48-11ea-81bc-bc764e2007e4 Received: from ppsw-31.csi.cam.ac.uk (unknown [131.111.8.131]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 4719d3a2-9f48-11ea-81bc-bc764e2007e4; Tue, 26 May 2020 11:58:57 +0000 (UTC) X-Cam-AntiVirus: no malware found X-Cam-ScannerInfo: http://help.uis.cam.ac.uk/email-scanner-virus Received: from 88-109-182-220.dynamic.dsl.as9105.com ([88.109.182.220]:45642 helo=[192.168.1.219]) by ppsw-31.csi.cam.ac.uk (smtp.hermes.cam.ac.uk [131.111.8.157]:465) with esmtpsa (PLAIN:amc96) (TLSv1.2:ECDHE-RSA-AES128-GCM-SHA256:128) id 1jdYES-000V8O-L6 (Exim 4.92.3) (return-path ); Tue, 26 May 2020 12:58:56 +0100 Subject: Re: Mail-Followup-To (was Re: Xen PVH domU start-of-day VCPU state) To: martin@lucina.net References: <20200525160401.GA3091@nodbug.lucina.net> <6a22e477-c9e7-f0d7-6cb1-615137a778be@citrix.com> <20200526085221.GB5942@nodbug.lucina.net> <36363b39-c8c1-82bf-af37-f0d917844bb4@citrix.com> <20200526115446.GA24386@nodbug.lucina.net> From: Andrew Cooper Message-ID: <14a27bd6-7013-2cbb-e202-05f0b32caf9a@citrix.com> Date: Tue, 26 May 2020 12:58:55 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200526115446.GA24386@nodbug.lucina.net> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Content-Language: en-GB X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: xen-devel@lists.xenproject.org, mirageos-devel@lists.xenproject.org Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" On 26/05/2020 12:54, Martin Lucina wrote: > On Tuesday, 26.05.2020 at 11:58, Andrew Cooper wrote: >> On 26/05/2020 09:52, Martin Lucina wrote: >>> On Monday, 25.05.2020 at 17:59, Andrew Cooper wrote: >>>> On 25/05/2020 17:42, Jürgen Groß wrote: >>>>> You need to setup virtual addressing and enable 64 bit mode before using >>>>> 64-bit GDT. >>>>> >>>>> See Mini-OS source arch/x86/x86_hvm.S >>>> Or >>>> https://xenbits.xen.org/gitweb/?p=people/andrewcoop/xen-test-framework.git;a=blob;f=arch/x86/hvm/head.S;h=f7dc72b58ab9ec68538f0087969ab6f72d181d80;hb=HEAD >>>> >>>> But yes - Juergen is correct.  Until you have enabled long mode, lgdt >>>> will only load the bottom 32 bits of GDTR.base. >>> Ah, I missed Jurgen's and your reply here. >> So the mailing list is doing something evil and setting: >> >> Mail-Followup-To: Andrew Cooper , >>     =?iso-8859-1?Q?J=FCrgen_Gro=DF?= , >>     xen-devel@lists.xenproject.org, mirageos-devel@lists.xenproject.org, >>     anil@recoil.org, dave@recoil.org >> >> which causes normal replies to cut you out. > I _think_ I've fixed this, it was due to ancient Mutt configuration (using > xensource.com / xen.org !?) for xen-devel at my end. > > Dropped the other direct Ccs to lessen the noise, but I have no real way of > testing without replying, so here goes. Sorry - still no luck.  Had to add you back in manually. ~Andrew