Re: [Xen-devel] [PATCH 00/14] Xen ARM DomU ACPI support

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

On 05/31/2016 03:42 PM, Konrad Rzeszutek Wilk wrote:
> On Tue, May 31, 2016 at 12:43:22PM +0800, Shannon Zhao wrote:
>> From: Shannon Zhao <shannon.zhao@xxxxxxxxxx>
>>
>> The design of this feature is described as below.
>> Firstly, the toolstack (libxl) generates the ACPI tables according the
>> number of vcpus and gic controller.
> CC-ing Boris - who has been working on exposing ACPI tables
> for PVH guests.
>
> Is there some way of re-using some of the code? 

Indeed it would be good to keep all ACPI code in single place.

I sent a patch series a while ago
(http://lists.xenproject.org/archives/html/xen-devel/2016-04/msg00625.html)
but because of release work it hasn't been reviewed yet. Shannon, can
you take a look at it and see whether you code can make use of what is
proposed there? It builds all the tables that you are building here
except for GTDT and provides libxc interface.

(Copying Roger, Andrew and Jan)

-boris


>> Then, it copies these ACPI tables to DomU memory space and passes
>> them to UEFI firmware through the "ARM multiboot" protocol.
>>
>> At last, UEFI gets the ACPI tables through the "ARM multiboot" protocol
>> and installs these tables like the usual way and passes both ACPI and DT
>> information to the Xen DomU.
>>
>> Currently libxl only generates RSDP, XSDT, GTDT, MADT, FADT, DSDT tables
>> since it's enough now.
>>
>> This has been tested using guest kernel with the Dom0 ACPI support
>> patches which could be fetched from:
>> https://git.kernel.org/cgit/linux/kernel/git/mfleming/efi.git/log/?h=efi/arm-xen
>>
>> Shannon Zhao (14):
>>   libxl/arm: Fix the function name in error log
>>   libxl/arm: Factor out codes for generating DTB
>>   libxc: Add placeholders for ACPI tables blob and size
>>   tools: add ACPI tables relevant definitions
>>   libxl/arm: Construct ACPI GTDT table
>>   libxl/arm: Construct ACPI FADT table
>>   libxl/arm: Construct ACPI DSDT table
>>   libxl/arm: Construct ACPI MADT table
>>   libxl/arm: Construct ACPI XSDT table
>>   libxl/arm: Construct ACPI RSDP table
>>   libxl/arm: Initialize domain param HVM_PARAM_CALLBACK_IRQ
>>   libxl/arm: Add ACPI module
>>   libxl/arm: initialize memory information of ACPI blob
>>   libxc/xc_dom_core: Copy ACPI tables to guest memory space
>>
>>  tools/libxc/include/acpi_defs.h | 277 ++++++++++++++++++++++++++++++++
>>  tools/libxc/include/xc_dom.h    |  17 ++
>>  tools/libxc/xc_dom_arm.c        |  16 +-
>>  tools/libxc/xc_dom_core.c       |  59 +++++++
>>  tools/libxl/libxl_arm.c         | 345 
>> +++++++++++++++++++++++++++++++++++++++-
>>  5 files changed, 706 insertions(+), 8 deletions(-)
>>  create mode 100644 tools/libxc/include/acpi_defs.h
>>
>> -- 
>> 2.0.4
>>
>>
>>
>> _______________________________________________
>> Xen-devel mailing list
>> Xen-devel@xxxxxxxxxxxxx
>> http://lists.xen.org/xen-devel



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