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| author | Michael S. Tsirkin <mst@redhat.com> | 2025-12-29 18:27:21 -0500 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2026-01-08 09:54:27 -0500 |
| commit | bd2b617c49820a38cefcf512c6d56d30deb59aa9 (patch) | |
| tree | 908c11710a6f0d45502383aecedae3f6348e3794 /scripts/module-common.c | |
| parent | 2678369e8efe0c5ac71adb49fbc2c240a222e44d (diff) | |
virtio-rng: fix DMA alignment for data buffer
The data buffer in struct virtrng_info is used for DMA_FROM_DEVICE via
virtqueue_add_inbuf() and shares cachelines with the adjacent
CPU-written fields (data_avail, data_idx).
The device writing to the DMA buffer and the CPU writing to adjacent
fields could corrupt each other's data on non-cache-coherent platforms.
Add __dma_from_device_group_begin()/end() annotations to place these
in distinct cache lines.
Message-ID: <157a63b6324d1f1307ddd4faa3b62a8b90a79423.1767601130.git.mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'scripts/module-common.c')
0 files changed, 0 insertions, 0 deletions