Re: [Xen-devel] [PATCH 1/2] xen/x86: return partial memory map in case of not enough space

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 06.12.16 at 10:44, <JGross@xxxxxxxx> wrote:
> On 06/12/16 09:51, Jan Beulich wrote:
>>>>> On 06.12.16 at 09:33, <JGross@xxxxxxxx> wrote:
>>> On 06/12/16 09:15, Jan Beulich wrote:
>>>> I'd like us to at least consider alternatives:
>>>>
>>>> 1) Have a new sub-op behaving BIOS like (one entry at a time).
>>>
>>> No objections from me.
>>>
>>>> 2) Make the full map available inside the initial mapping, pointed to
>>>> by a new entry in the start info structure.
>>>
>>> What about PVH?
>> 
>> Does PVH re-arrangement of its physical memory too? I didn't think
>> so ...
> 
> Not yet. Are you sure it won't be needed in future? Why was it done in
> the pvops kernel? I thought the main reason was to have the same PCI
> space address layout as on the native system in order to avoid any bad
> surprises due to buggy firmware and/or BIOS. The same could apply for
> PVH.

PVH Dom0 (iirc) gets its memory arranged around MMIO holes
already (by the hypervisor).

Jan


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