Re: [Xen-devel] Design doc of adding ACPI support for arm64 on Xen - version 2

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 13.08.15 at 10:01, <christoffer.dall@xxxxxxxxxx> wrote:
> On Thu, Aug 13, 2015 at 8:41 AM, Jan Beulich <JBeulich@xxxxxxxx> wrote:
>>>>> On 12.08.15 at 18:18, <julien.grall@xxxxxxxxxx> wrote:
>>> Nonetheless, we still have to copy some table in Xen in order to modify
>>> them and/or new one. I have in mind the FADT table to set the hypervisor
>>> field and hiding the hypervisor specific data (GIC hyp, timer hyp...) to
>>> avoid the kernel thinks there is hyp mode available.
>>
>> "Have to"? Or rather "would like to"? As said in another reply to
>> Shannon, I didn't see any rationale spelled out for this fundamental
>> difference to x86.
>>
> So the suggestion is to just edit the tables in place rather than
> copying them and relying on Xen having already read whatever
> 'original' information it needs before modifying them?

No, the suggestion is to leave the tables alone and teach Dom0
to ignore parts it has no interest in.

Jan


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