Re: [Xen-devel] [PATCH v8 0/7] xen/arm: Add GICv3 support

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 08/04/2014 11:06 AM, Ian Campbell wrote:
> On Sun, 2014-08-03 at 22:24 +0100, Julien Grall wrote:
>> Hi Vijay,
>>
>> On 23/07/14 14:41, vijay.kilari@xxxxxxxxx wrote:
>>> From: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>
>>>
>>> Add GICv3 support for arm64 platform.
>>>  From v6 version, this patch series is split into v6a and v6.
>>> All the GICv2 and VGIC code refactoring patches of v6a are merged.
>>>
>>> The v8 version of GICv3 patches are posted here.
>>>
>>> Tested with ARM64 simulator with multicore core
>>> and booted Dom0 kernel.
>>
>> Do you have any plan to add support for guest? This actual series looks 
>> pointless to me if we are only able to boot DOM0...
> 
> That's not pointless, it's a necessary step along the way to supporting
> GICv3.
> 
> Remember: Xen wouldn't boot on these systems at all without GICv3
> support (since they lack v2 compatibility in h/w), so getting to a dom0
> prompt is a useful step in its own right.
> 
>>  Hence, this series 
>> doesn't support GICv2 emulation on GICv3.
>>
>> It would be nice if you fix the toolstack as soon as possible.
> 
> A not for application bodge at the end of the series would be nice, but
> not critical IMHO. Proper toolstack level support for gic v3 can come
> next.

I'm mostly worry on the fact in 8 versions of this series we didn't see
any support/testing for GICv3 guest.

If it doesn't happen that mean we will have a Xen 4.5 with GICv3 support
only able to boot DOM0...

I want to make sure that won't happen.

Regards,

-- 
Julien Grall

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