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| author |   Julien Grall <julien.grall@citrix.com> | 2015-10-13 17:50:12 +0100 |
|---|---|---|
| committer |   David Vrabel <david.vrabel@citrix.com> | 2015-10-23 14:20:46 +0100 |
| commit | f73314b28148f9ee9f89a0ae961c8fb36e3269fa (patch) | |
| tree | 723535d3e14456d2c36d75ebfb97774f74998407 /include/xen/grant_table.h | |
| parent | xen/xenbus: Rename *RING_PAGE* to *RING_GRANT* (diff) | |
| download | wireguard-linux-f73314b28148f9ee9f89a0ae961c8fb36e3269fa.tar.xz wireguard-linux-f73314b28148f9ee9f89a0ae961c8fb36e3269fa.zip | |
xen/grant-table: Add an helper to iterate over a specific number of grants
With the 64KB page granularity support on ARM64, a Linux page may be
split accross multiple grant.
Currently we have the helper gnttab_foreach_grant_in_grant to break a
Linux page based on an offset and a len, but it doesn't fit when we only
have a number of grants in hand.
Introduce a new helper which take an array of Linux page and a number of
grant and will figure out the address of each grant.
Signed-off-by: Julien Grall <julien.grall@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Diffstat (limited to 'include/xen/grant_table.h')
| -rw-r--r-- | include/xen/grant_table.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/xen/grant_table.h b/include/xen/grant_table.h index e17a4b381a16..34b1379f9777 100644 --- a/include/xen/grant_table.h +++ b/include/xen/grant_table.h @@ -264,6 +264,12 @@ static inline void gnttab_for_one_grant(struct page *page, unsigned int offset, gnttab_foreach_grant_in_range(page, offset, len, fn, data); } +/* Get @nr_grefs grants from an array of page and call fn for each grant */ +void gnttab_foreach_grant(struct page **pages, + unsigned int nr_grefs, + xen_grant_fn_t fn, + void *data); + /* Get the number of grant in a specified region * * start: Offset from the beginning of the first page |