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Re: [Xen-devel] [RFC PATCH v1 10/10] xen/arm: GICv3 device tree parsing

On 03/24/2014 12:03 PM, Julien Grall wrote:
> On 03/24/2014 11:43 AM, Ian Campbell wrote:
>> There is also the question of what guests use, which I suppose it mostly
>> the same as dom0, but without the expectation that the guest kernel has
>> to boot natively on a specific platform.
>> I'm not sure what to suggest here, but I think for dom0 we can rely on
>> "dom0 kernel should be usable as a native kernel on this platform" and
>> we can punt for now on what to do about guests.
> As GICv3 is 64-bits only, that would mean you can't boot 32bit dom0 on
> this platform, right?

Hmmm ... this question was stupid. GICv8 is ARMv8 specific not 64bits.
Sorry for the noise.

I think for the guest we have to support VGICv2 on GICv3 (if the
hardware support it). The user might want to try his shiny OS which only
support GICv2 on any hardware. It's easier than writing a support for GICv3.

Julien Grall

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