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337dc1cf1d
This is to backport virtio IOMMU backend driver from Cloud-hypervisor,
which emulates an IOMMU device to manage DMA from one or more endpoints
in the guest.
Some differences from the Cloud-hypervisor implementation:
- Simplified the mapping between IOMMU driver and Vfio container
- This port supports multiple endpoints attach to same IOMMU domain.
BUG=b:181736020
TEST=bin/clippy, functional tests specified in the patch
"iommu: enable virtio IOMMU driver"
Change-Id: I3db3b46a72e82908459e91a4e6852a335c606db1
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/2846421
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-by: David Stevens <stevensd@chromium.org>
Commit-Queue: David Stevens <stevensd@chromium.org>
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