* IOMMU support for HVM grant table mappings
@ 2010-01-13 22:00 Justin T. Gibbs
2010-01-14 9:30 ` Keir Fraser
0 siblings, 1 reply; 2+ messages in thread
From: Justin T. Gibbs @ 2010-01-13 22:00 UTC (permalink / raw)
To: xen-devel@lists.xensource.com
Xen 4.0 recently added support for grant table mappings in the HVM P2M
tables.
The current code explicitly avoids adding an IOMMU mapping in this case.
Is this an oversight or is there an architectural reason that the IOMMU is
not updated? This seems to be the last piece needed to allow HVM driver
domains with PCI pass-thru devices to function without extra memory copies.
Thanks,
Justin
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: IOMMU support for HVM grant table mappings
2010-01-13 22:00 IOMMU support for HVM grant table mappings Justin T. Gibbs
@ 2010-01-14 9:30 ` Keir Fraser
0 siblings, 0 replies; 2+ messages in thread
From: Keir Fraser @ 2010-01-14 9:30 UTC (permalink / raw)
To: gibbs@scsiguy.com, xen-devel@lists.xensource.com
It's probably an oversight.
-- Keir
On 13/01/2010 22:00, "Justin T. Gibbs" <gibbs@scsiguy.com> wrote:
> Xen 4.0 recently added support for grant table mappings in the HVM P2M
> tables.
> The current code explicitly avoids adding an IOMMU mapping in this case.
> Is this an oversight or is there an architectural reason that the IOMMU is
> not updated? This seems to be the last piece needed to allow HVM driver
> domains with PCI pass-thru devices to function without extra memory copies.
>
> Thanks,
> Justin
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
^ permalink raw reply [flat|nested] 2+ messages in thread
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