Re: [Xen-devel] [Patch] Make memory hole for PCI Express bigger and prevent roll-over

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 21/1/08 14:59, "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx> wrote:

>> Also should the hole used by the Xen HVM BIOS be limited to
>> 0xF0000000-0xF4FFFFFF rather than 0xF00000000-0xFFFFFFFF?  Because:
>>   - The current DSDT specifies 0xF0000000-0xF4FFFFFF.
> 
> I think this is because it was "big enough" for the Intel engineer who first
> did the Xen ACPI work. There's no reason not to go up to, say, FC000000. We
> can't go all the way to 4GB because there a couple of things up there (at
> least LAPIC and IOAPIC mappings).

Actually, if we do this, will 192MB be enough to be getting along with
anyway, for any devices anyone is currently testing with pass-thru?

Adding the roll-over check is obviously a good idea anyway.

 -- Keir



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