| |
|
 |
|
 |
|
|
|
| |
|
|
xen-devel
Re: [Xen-devel] VP problematic for backend drivers on IA64?
On 25 Jan 2006, at 16:46, Muli Ben-Yehuda wrote:
That's a good point. Since Xen provides its own "IOMMU" (swiotlb at
the moment), I think we should set PCI_DMA_BUS_IS_PHYS so that the
block layer never does bounce buffers on its own - unless doing it
there is more efficient?
We set it to zero if using swiotlb. I think setting it to zero disables
driver-specific bounce buffer code?
As for drivers that don't use DMA - we only care about
para-virtualized drivers. I doubt we'll see any PV drivers where the
real drivers don't do DMA.
That's a big assumption that may only be 99.9% correct. :-)
-- Keir
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
|
|
| |
|
Home