Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754751AbcDFLc5 (ORCPT ); Wed, 6 Apr 2016 07:32:57 -0400 Received: from foss.arm.com ([217.140.101.70]:56488 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750719AbcDFLcz (ORCPT ); Wed, 6 Apr 2016 07:32:55 -0400 Subject: Re: [PATCH v10 00/17] Add ACPI support for Xen Dom0 on ARM64 To: Shannon Zhao , linux-arm-kernel@lists.infradead.org, stefano.stabellini@citrix.com References: <1459525755-36968-1-git-send-email-shannon.zhao@linaro.org> Cc: david.vrabel@citrix.com, devicetree@vger.kernel.org, linux-efi@vger.kernel.org, linux-kernel@vger.kernel.org, catalin.marinas@arm.com, will.deacon@arm.com, peter.huangpeng@huawei.com, xen-devel@lists.xen.org, zhaoshenglong@huawei.com From: Julien Grall Message-ID: <5704F3E1.7020508@arm.com> Date: Wed, 6 Apr 2016 12:32:49 +0100 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:38.0) Gecko/20100101 Thunderbird/38.6.0 MIME-Version: 1.0 In-Reply-To: <1459525755-36968-1-git-send-email-shannon.zhao@linaro.org> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1555 Lines: 38 Hi Shannon, On 01/04/2016 16:48, Shannon Zhao wrote: > This patch set adds ACPI support for Xen Dom0 on ARM64. The relevant Xen > ACPI on ARM64 design document could be found from [1]. > > This patch set adds a new FDT node "uefi" under /hypervisor to pass UEFI > information. Introduce a bus notifier of AMBA and Platform bus to map > the new added device's MMIO space. Make Xen domain use > xlated_setup_gnttab_pages to setup grant table and a new hypercall to > get event-channel irq. > > Regarding the initialization flow of Linux kernel, it needs to move > xen_early_init() before efi_init(). Then xen_early_init() will check > whether it runs on Xen through the /hypervisor node and efi_init() will > call a new function fdt_find_xen_uefi_params(), to parse those > xen,uefi-* parameters just like the existing efi_get_fdt_params(). > > And in arm64_enable_runtime_services() it will check whether it runs on > Xen and call another new function xen_efi_runtime_setup() to setup > runtime service instead of efi_native_runtime_setup(). The > xen_efi_runtime_setup() will assign the runtime function pointers with > the functions of driver/xen/efi.c. > > And since we pass a /hypervisor node and a /chosen node to Dom0, it > needs to check whether the DTS only contains a /hypervisor node and a > /chosen node in acpi_boot_table_init(). > > Patches are tested on FVP base model. They can be fetched from[2]. I have tested this series and Linux is booting up to the prompt: Tested-by: Julien Grall Regards, -- Julien Grall