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Re: [Xen-devel] [PATCH 0 of 5] Add support for mapping grant references
| To: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH 0 of 5] Add support for mapping grant references into HVM guests (+ some cleanup) |
| From: | "Justin T. Gibbs" <gibbs@xxxxxxxxxxx> |
| Date: | Fri, 08 Jan 2010 16:43:38 -0700 |
| Cc: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Fri, 08 Jan 2010 15:44:01 -0800 |
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On 12/18/2009 9:05 AM, Keir Fraser wrote: Support is already in the tree and will be part of Xen 4.0. See xen-unstable changeset 19932:c0cb307d927f. -- Keir I have successfully integrated the 4.0 change into my 3.4.1 test system. The changes works as expected so long as the I/O is serviced via a copy from memory owned by the device domain. However, iommu mappings are not updated for HVM grant table updates so it is not possible to use DMA. I am experimenting with changes to update the iommu for p2m_grant_map* types but wonder is some overarching architectural consideration I'm missing that would explain why the iommu was not updated in the original changes? -- Justin _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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