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

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 11.08.15 at 16:12, <ian.campbell@xxxxxxxxxx> wrote:
> On Fri, 2015-08-07 at 10:11 +0800, Shannon Zhao wrote:
>> 
> [...]
>> 3. Dom0 gets grant table and event channel irq information
>> -----------------------------------------------------------
>> As said above, we assign the hypervisor_id be "XenVMM" to tell Dom0 that
>> it runs on Xen hypervisor.
>> 
>> For grant table, add two new HVM_PARAMs: HVM_PARAM_GNTTAB_START_ADDRESS
>> and HVM_PARAM_GNTTAB_SIZE.
> 
> The reason we expose this range is essentially to allow OS authors to take
> a short cut by telling them about an IPA range which is unused, so it is
> available for remapping the grant table into. On x86 there is a BAR on the
> Xen platform PCI device which serves a similar purpose.

Ah, this answers a question I just raised, but means the items are
mis-named and badly described.

Jan


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