diff options
| author | Hollis Blanchard <hollisb@us.ibm.com> | 2008-11-13 15:48:33 -0600 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-12-30 09:26:04 +1030 |
| commit | 1b4aa2faeca1b9922033daf2475b6fc13b0ffea6 (patch) | |
| tree | b94e3f4ec45151e51ad1b3dfecabc5391684c725 /include | |
| parent | 87c7d57c17ade5024d95b6ca0da249da49b0672a (diff) | |
virtio: avoid implicit use of Linux page size in balloon interface
Make the balloon interface always use 4K pages, and convert Linux pfns if
necessary. This patch assumes that Linux's PAGE_SHIFT will never be less than
12.
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> (modified)
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/virtio_balloon.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/virtio_balloon.h b/include/linux/virtio_balloon.h index c30c7bfbf39..8726ff77763 100644 --- a/include/linux/virtio_balloon.h +++ b/include/linux/virtio_balloon.h @@ -10,6 +10,9 @@ /* The feature bitmap for virtio balloon */ #define VIRTIO_BALLOON_F_MUST_TELL_HOST 0 /* Tell before reclaiming pages */ +/* Size of a PFN in the balloon interface. */ +#define VIRTIO_BALLOON_PFN_SHIFT 12 + struct virtio_balloon_config { /* Number of pages host wants Guest to give up. */ |