Re: [Xen-devel] [PATCH v2 00/15] xen/arm: Add GICv3 support

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 04/04/2014 04:56 PM, Vijay Kilari wrote:
> On Fri, Apr 4, 2014 at 6:31 PM, Julien Grall <julien.grall@xxxxxxxxxx> wrote:
>> Hi Vijay
>>
>> On 04/04/2014 12:56 PM, vijay.kilari@xxxxxxxxx wrote:
>>> From: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>
>>>
>>> Made changes to existing gic and vgic drivers
>>> to make it generic and added support for GIC v3
>>> hw version
>>>
>>> Tested with ARM64 simulator with single core
>>
>> What about multiple core? On V1 you said you were unable to use SMP with
>> GICv3, did you find the issue?
>>
>    There is no issue with hardware now. Xen can boot with multicore (2
> cores) but dom0 single core.
> limited using bootargs. I started working on Dom0 boot with multicore.
> 
> In GICv3, On SGI at EL1 (kernel), it traps to EL2. Xen does not handle
> this trap.
> So need to implement it. I started working on it and also trying to
> understand EL1
>  SGI routing in vgic driver. BTW do you know how SGI is handled in
> ARMv7 with GICv2?
> I think vgic_to_sgi() in vgic driver is managing it.

Right, EL1 raises an SGI via the distributor.

Regards,

-- 
Julien Grall

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