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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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Merge tag 'vfio-v6.19-rc8' of https://github.com/awilliam/linux-vfio
Pull VFIO fix from Alex Williamson:
- Fix a gap in the initial VFIO DMABUF implementation where it's
required to explicitly implement a failing pin callback to prevent
pinned importers that cannot properly support move_notify.
(Leon Romanovsky)
* tag 'vfio-v6.19-rc8' of https://github.com/awilliam/linux-vfio:
vfio: Prevent from pinned DMABUF importers to attach to VFIO DMABUF
+12
+12
drivers/vfio/pci/vfio_pci_dmabuf.c
+12
drivers/vfio/pci/vfio_pci_dmabuf.c
···
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u8 revoked : 1;
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};
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+
static int vfio_pci_dma_buf_pin(struct dma_buf_attachment *attachment)
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{
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return -EOPNOTSUPP;
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}
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+
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static void vfio_pci_dma_buf_unpin(struct dma_buf_attachment *attachment)
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{
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/* Do nothing */
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}
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+
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static int vfio_pci_dma_buf_attach(struct dma_buf *dmabuf,
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struct dma_buf_attachment *attachment)
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{
···
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}
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static const struct dma_buf_ops vfio_pci_dmabuf_ops = {
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.pin = vfio_pci_dma_buf_pin,
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.unpin = vfio_pci_dma_buf_unpin,
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.attach = vfio_pci_dma_buf_attach,
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.map_dma_buf = vfio_pci_dma_buf_map,
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.unmap_dma_buf = vfio_pci_dma_buf_unmap,