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Re: [Xen-devel] [PATCH v3 00/15] xen/arm: Bug fixes for the vGIC

On 20/02/15 10:44, Ian Campbell wrote:
> On Fri, 2015-02-20 at 15:56 +0530, Vijay Kilari wrote:
>> On Fri, Feb 20, 2015 at 3:44 PM, Ian Campbell <ian.campbell@xxxxxxxxxx> 
>> wrote:
>>> On Thu, 2015-02-19 at 18:01 +0000, Julien Grall wrote:
>>>> Based on the discussion, what about waiting until someone complain about
>>>> GICv3 support on Xen 4.5?
>>> That sounds like a reasonable compromise.
>> If Xen 4.5 claims GICv3 support, then it is better to backport vgic-v3 
>> patches.
>> May be ThunderX is the only platform out there with GICv3 support.
>> At some point of time we might require ThunderX support on 4.5 release.
>> If you are going to backport only on-demand then it should be for now.
> Is ThunderX going to be available to purchase before the 4.6 release in
> the summer?

Even if the GICv3 patches backported, there is no GICv3 ITS, SMMUv2 and
48 cores supports in Xen 4.5. That would mean that there is no MSI
neither PCI-passthrough working.

Given that, there is not much interest to have Xen 4.5 running on
ThunderX. You won't be able to use the full capacity of the board.

I think we should focus on upstreaming all the features required in Xen
4.6 as soon as possible.


Julien Grall

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