From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752559AbdKHORi (ORCPT ); Wed, 8 Nov 2017 09:17:38 -0500 Received: from mx2.suse.de ([195.135.220.15]:38947 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751448AbdKHORg (ORCPT ); Wed, 8 Nov 2017 09:17:36 -0500 Subject: Re: [Xen-devel] [PATCH 3/3] x86/xen: use guest_late_init to detect Xen PVH guest To: Boris Ostrovsky , Jan Beulich Cc: len.brown@intel.com, x86@kernel.org, tglx@linutronix.de, xen-devel@lists.xenproject.org, mingo@redhat.com, pbonzini@redhat.com, rkrcmar@redhat.com, rjw@rjwysocki.net, pavel@ucw.cz, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, hpa@zytor.com References: <20171108090739.26491-1-jgross@suse.com> <20171108090739.26491-4-jgross@suse.com> <5A02F633020000780018D26A@suse.com> <5A030726020000780018D323@prv-mh.provo.novell.com> <37c2e2cc-4419-0adf-2f9c-ad7762c95cbd@suse.com> <5A030D78020000780018D37B@suse.com> From: Juergen Gross Message-ID: <8e85c24d-b8ce-10aa-e030-f3d576eb781e@suse.com> Date: Wed, 8 Nov 2017 15:17:33 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: de-DE Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 08/11/17 15:10, Boris Ostrovsky wrote: > On 11/08/2017 08:36 AM, Juergen Gross wrote: >> >> Regarding ACPI tables: current PVH implementation in Linux kernel >> seems not to make use of the special information presented in the boot >> information block. > > It will need to do so for dom0 (and, then, for simplicity, for all PVH > guests). What about: for all PVH guests booted via the PVH specific boot entry? A guest booted via the default boot entry won't know it is PVH until ACPI tables have been scanned. Juergen