On 03/10/2015 03:35 AM, Jan Beulich wrote:
On 09.03.15 at 20:02, <suravee.suthikulpa...@amd.com> wrote:
I agree that having the IO page tables on the NUMA node that is closest
to the IOMMU would be beneficial.
And I already withdrew this patch and the corresponding VT-d one.
However, I am not sure at the moment
that this information could be easily determined. I think ACPI _PXM for
devices should be able to provide this information, but this is optional
and often not available.
And even if it was available, it would be too late at least for Dom0's
allocations (as it requires Dom0's interpreter to dig out this detail).
The best we could do in that case would be to try to replace the
existing tables. Or assume Dom0 is being placed suitably by the
dom0_nodes= option. Or add yet another option.
There is a nodeID register on each northbridge (D1<x>F0x60). You would
have to figure out how to map it to _PXMs though.
-boris
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xen.org
http://lists.xen.org/xen-devel
