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[Xen-devel] Re: RFC: Using grant table to give iomem permission
| To: | Kieran Mansley <kmansley@xxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Re: RFC: Using grant table to give iomem permission |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | Fri, 18 May 2007 15:05:55 +0100 |
| Delivery-date: | Fri, 18 May 2007 07:04:27 -0700 |
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| Thread-index: | AceZVaae5StpCQVIEdyDCwAX8io7RQ== |
| Thread-topic: | RFC: Using grant table to give iomem permission |
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On 18/5/07 15:01, "Kieran Mansley" <kmansley@xxxxxxxxxxxxxx> wrote: > When finished, the mapping domain can similarly unmap the grant, which > removes its ability to ioremap() the page: > struct gnttab_unmap_grant_ref op; > gnttab_set_unmap_op(&op, 0, GNTMAP_iomem_map, handle); > if (HYPERVISOR_grant_table_op(GNTTABOP_unmap_grant_ref, &op, 1)) > BUG(); > > Some questions from me: > - does this approach seem sane? There's no reason you shouldn't be able to use GNTMAP_host_map as usual, and do refcounting in the active grant entry, also as usual. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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