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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-01-02 23:07:50 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-01-02 23:07:50 +0300 |
| commit | d7e19bd882c23109853ac67f414024c816edc8b9 (patch) | |
| tree | 9a302460f9aaa477d8203bd681261e1c1960aa4a /include | |
| parent | 5e0f872c7d7e371fbdf09e864eddd24bddfda8fe (diff) | |
| parent | 5d9a07b0de512b77bf28d2401e5fe3351f00a240 (diff) | |
| download | linux-d7e19bd882c23109853ac67f414024c816edc8b9.tar.xz | |
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull vhost cleanup and virtio bugfix
"There's a single change here, fixing a vhost bug where vhost
initialization fails due to used ring alignment check being too
strict"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
vhost: relax used address alignment
virtio_ring: document alignment requirements
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/virtio_ring.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/uapi/linux/virtio_ring.h b/include/uapi/linux/virtio_ring.h index 61c818a7fe70..a3318f31e8e7 100644 --- a/include/uapi/linux/virtio_ring.h +++ b/include/uapi/linux/virtio_ring.h @@ -101,6 +101,13 @@ struct vring { struct vring_used *used; }; +/* Alignment requirements for vring elements. + * When using pre-virtio 1.0 layout, these fall out naturally. + */ +#define VRING_AVAIL_ALIGN_SIZE 2 +#define VRING_USED_ALIGN_SIZE 4 +#define VRING_DESC_ALIGN_SIZE 16 + /* The standard layout for the ring is a continuous chunk of memory which looks * like this. We assume num is a power of 2. * |