[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [v1 1/2] xen/p2m: Create identity mappings for PFNs beyound E820 and PCI BARs
On Tue, Oct 29, 2013 at 08:23:30AM +0000, Jan Beulich wrote: > >>> On 28.10.13 at 17:58, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> > >>> wrote: > > On Fri, Oct 25, 2013 at 04:08:19PM -0600, Bjorn Helgaas wrote: > >> If you can look at PCI host bridge apertures instead of BARs, that > >> would solve both problems. Reassigning those apertures is > >> theoretically possible but is not even a gleam in our eyes yet. > > > > <nods> I think I have to have both (BARs and host bridge apertures) as when > > we do PCI passthrough to a guest - we might do it without a bridge. > > Why? Aren't the host bridge ranges necessarily a superset of the > individual devices' BARs? Yes. But when you pass in a PCI device to a PV guest you don't pass in the bridge. Just the PCI device itself. > > Jan > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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