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| author | Sarah Walker <sarah.walker2@arm.com> | 2026-03-17 10:54:30 +0000 |
|---|---|---|
| committer | Andrew Turner <andrew@FreeBSD.org> | 2026-03-17 10:56:27 +0000 |
| commit | 1d13d938fe6c7639d2bb4cb5248a1f81275b6891 (patch) | |
| tree | 7230ce43c66bca7a786eb31994cdb84d223dc810 | |
| parent | 7b9bb32d1cc6779139780baed983129b53a7f36e (diff) | |
virtio: Ensure power-of-two alignment for indirect queue
Some platforms enforce power-of-two alignment for bus_dma tags. Rounding up
the natural size may result in over-alignment, but should be safe.
PR: 293770
Reviewed by: andrew
Fixes: c499ad6f997c ("virtio: Use bus_dma for ring and indirect buffer allocations")
Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D55843
| -rw-r--r-- | sys/dev/virtio/virtqueue.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/sys/dev/virtio/virtqueue.c b/sys/dev/virtio/virtqueue.c index b7fdb4703ccb..10b5179bd3d5 100644 --- a/sys/dev/virtio/virtqueue.c +++ b/sys/dev/virtio/virtqueue.c @@ -341,7 +341,7 @@ virtqueue_init_indirect(struct virtqueue *vq, int indirect_size) align = size; error = bus_dma_tag_create( bus_get_dma_tag(dev), /* parent */ - align, /* alignment */ + roundup_pow_of_two(align), /* alignment */ 0, /* boundary */ BUS_SPACE_MAXADDR, /* lowaddr */ BUS_SPACE_MAXADDR, /* highaddr */ |