| Date | Tue, 19 May 2015 14:57:59 +0100 | From | David Vrabel <> | Subject | Re: [Xen-devel] [RFC 12/23] xen: Extend page_to_mfn to take an offset in the page |
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On 14/05/15 18:00, Julien Grall wrote: > With 64KB page granularity support in Linux, a page will be split accross > multiple MFN (Xen is using 4KB page granularity). Thoses MFNs may not be > contiguous. > > With the offset in the page, the helper will be able to know which MFN > the driver needs to retrieve.
I think a gnttab_grant_foreign_access_ref()-like helper that takes a page would be better.
You will probably want this helper able to return/fill a set of refs for 64 KiB pages.
David
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