linux-kernel - Re: [PATCH v10 00/17] Add ACPI support for Xen Dom0 on ARM64

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Message-ID: <5705BA61.7000205@huawei.com>
Date:	Thu, 7 Apr 2016 09:39:45 +0800
From:	Shannon Zhao <zhaoshenglong@...wei.com>
To:	Julien Grall <julien.grall@....com>,
	Shannon Zhao <shannon.zhao@...aro.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<stefano.stabellini@...rix.com>
CC:	<david.vrabel@...rix.com>, <devicetree@...r.kernel.org>,
	<linux-efi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<catalin.marinas@....com>, <will.deacon@....com>,
	<peter.huangpeng@...wei.com>, <xen-devel@...ts.xen.org>
Subject: Re: [PATCH v10 00/17] Add ACPI support for Xen Dom0 on ARM64

Hi Julien,

On 2016/4/6 19:32, Julien Grall wrote:
> 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 <julien.grall@....com>
Thanks a lot. There are several patches which you didn't give your
comments. So I assume you will review them. If so, I'll wait and update
this series later.

Thanks,
-- 
Shannon