From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752529AbeBSK1U (ORCPT ); Mon, 19 Feb 2018 05:27:20 -0500 Received: from mga07.intel.com ([134.134.136.100]:13279 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752309AbeBSK1T (ORCPT ); Mon, 19 Feb 2018 05:27:19 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.46,534,1511856000"; d="scan'208";a="176413070" Subject: Re: [PATCH v3 0/3] xen: re-enable booting as Xen PVH guest To: Juergen Gross , linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, linux-acpi@vger.kernel.org, x86@kernel.org Cc: lenb@kernel.org, boris.ostrovsky@oracle.com, hpa@zytor.com, tglx@linutronix.de, mingo@redhat.com References: <20180219100906.14265-1-jgross@suse.com> From: "Rafael J. Wysocki" Organization: Intel Technology Poland Sp. z o. o., KRS 101882, ul. Slowackiego 173, 80-298 Gdansk Message-ID: <209b38ec-aab4-ea5f-70a2-3f9bdb1f52a1@intel.com> Date: Mon, 19 Feb 2018 11:27:15 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-Version: 1.0 In-Reply-To: <20180219100906.14265-1-jgross@suse.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2/19/2018 11:09 AM, Juergen Gross wrote: > The Xen PVH boot protocol passes vital information to the kernel via > a start_info block. One of the data transferred is the physical address > of the RSDP table. > > Unfortunately PVH support in the kernel didn't use that passed address > for RSDP, but relied on the legacy mechanism searching for the RSDP in > low memory. After a recent change in Xen putting the RSDP to a higher > address booting as PVH guest is now failing. > > This small series repairs that by passing the RSDP address from the > start_info block to ACPI handling. > > Changes in V3: > - instead of using a weak function add a function pointer to x86_init > for obtaining the RSDP address > > Juergen Gross (3): > acpi: introduce acpi_arch_get_root_pointer() for getting rsdp address > x86/acpi: add a new x86_init_acpi structure to x86_init_ops > x86/xen: add pvh specific rsdp address retrieval function > > arch/x86/include/asm/acpi.h | 7 +++++++ > arch/x86/include/asm/x86_init.h | 9 +++++++++ > arch/x86/kernel/x86_init.c | 5 +++++ > arch/x86/xen/enlighten_pvh.c | 14 +++++++++++--- > drivers/acpi/osl.c | 5 ++++- > include/linux/acpi.h | 7 +++++++ > 6 files changed, 43 insertions(+), 4 deletions(-) > The series is fine by me: Acked-by: Rafael J. Wysocki