Re: [Xen-devel] [RFC 0 PATCH 3/3] PVH dom0: construct_dom0 changes

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 04.10.13 at 18:02, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:
> So back to hooking up a new hypercall in the PCI subsystem when
> resource assigment has been completed? And also if the PCI subsystem
> decides to re-write the resource addresses to odd locations.
> 
> Can't one also trap for the configuration changes on the PCI
> devices and extract the physical locations then?

Yes, of course we could be snooping the CFG writes, but that's
as simple as it sounds only for the port CF8 based accesses. For
MCFG based accesses it would mean we'd have to write protect
the whole MCFG range, and use emulation there. Not very
pretty, but doable.

Jan


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