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| author | Xiong Weimin <xiongweimin@kylinos.cn> | 2026-06-26 10:05:45 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2026-08-19 06:38:45 -0400 |
| commit | 7b411448c668bfab0d0e572cee5a592cea396ce7 (patch) | |
| tree | 8dac5fa269fbe8bcc2f3d87d7ec5ea57ca90c31d /include | |
| parent | 135f0abe31397694c06f5e28bf93d5e123756abc (diff) | |
| download | linux-7b411448c668bfab0d0e572cee5a592cea396ce7.tar.gz linux-7b411448c668bfab0d0e572cee5a592cea396ce7.zip | |
vdpa_sim: hold iommu_lock across dma_unmap passthrough transition
vdpasim_dma_map() updates the IOTLB and the passthrough (iommu_pt)
state under iommu_lock. vdpasim_dma_unmap() clears iommu_pt and
resets the IOTLB before taking iommu_lock, then deletes the mapping
while holding the lock.
A concurrent dma_map(), dma_unmap(), or reset path that also touches
the same address space can therefore observe or modify the IOTLB and
iommu_pt state without consistent locking.
Perform the passthrough transition and range deletion under the same
iommu_lock scope, matching dma_map().
Tested-on: openEuler VM (6.16.8, /usr/src/linux-6.16.8)
Tested-by: Xiong Weimin <xiongweimin@kylinos.cn>
Signed-off-by: Xiong Weimin <xiongweimin@kylinos.cn>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20260626020545.607600-3-15927021679@163.com>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions