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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] grant table interface addition?
On 30/10/08 15:53, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: >>>> Keir Fraser <keir.fraser@xxxxxxxxxxxxx> 30.10.08 15:15 >>> >> On 30/10/08 14:06, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: >>> As to PAGE_IO, wouldn't it be appropriate to set this flag on pte-s created >>> with GNTMAP_device_map? Or is the name misleading me? I'm perhaps >>> confused by the fact that the use of this flag is not tied to granting iomem >>> pages... >> >> The idea was that this would grant-map pages into an iommu. Really it's not >> actually been used, but GNTMAP_device_map doesn't cause mappings to appear >> in host page tables. > > It actually is being used in Solarflare's acceleration backend - what you say > makes me think this could be wrong then. I suppose it's useful if you only want the machine address of the granted page, and don't care about getting a host mapping. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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