Re: [Xen-devel] [PATCH for-4.10] libxc: load acpi RSDP table at correct address

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 20.11.17 at 14:56, <boris.ostrovsky@xxxxxxxxxx> wrote:
> On 11/20/2017 06:50 AM, Jan Beulich wrote:
>>>>> On 20.11.17 at 12:20, <jgross@xxxxxxxx> wrote:
>>> Which restriction? I'm loading the RSDP table to its architectural
>>> correct addres if possible, otherwise it will be loaded to the same
>>> address as without my patch. So I'm not adding a restriction, but
>>> removing one.
>> What is "architecturally correct" in PVH can't be read out of
>> specs other than what we write down. When there's no BIOS,
>> placing anything right below the 1Mb boundary is at least
>> bogus.
> 
> Unless it's a UEFI boot -- where else would you put it? Aren't these two
> (UEFI and non-UEFI) the only two options that the ACPI spec provides?

Of course - we can't really expect them to cater for something like
PVH. But this also means we can't always use the spec as reference
point here.

Jan


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