iommu: Add API to request DMA domain for device

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Normally during iommu probing a device, a default doamin will
be allocated and attached to the device. The domain type of
the default domain is statically defined, which results in a
situation where the allocated default domain isn't suitable
for the device due to some limitations. We already have API
iommu_request_dm_for_dev() to replace a DMA domain with an
identity one. This adds iommu_request_dma_domain_for_dev()
to request a dma domain if an allocated identity domain isn't
suitable for the device in question.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Lu Baolu 2019-05-25 13:41:22 +08:00 • committed by Joerg Roedel

parent dd5142ca5d

commit 7423e01741

2 changed files with 31 additions and 11 deletions

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36

drivers/iommu/iommu.c

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6

include/linux/iommu.h

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