iommu/vt-d: Support asynchronous IOMMU nested capabilities

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Current VT-d implementation supports nested translation only if all
underlying IOMMUs support the nested capability. This is unnecessary
as the upper layer is allowed to create different containers and set
them with different type of iommu backend. The IOMMU driver needs to
guarantee that devices attached to a nested mode iommu_domain should
support nested capabilility.

Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20210517065701.5078-1-baolu.lu@linux.intel.com
Link: https://lore.kernel.org/r/20210610020115.1637656-6-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Lu Baolu 2021-06-10 10:00:57 +08:00 • committed by Joerg Roedel

parent 879fcc6bda

commit 521f546b4e

1 changed files with 8 additions and 1 deletions

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drivers/iommu/intel/iommu.c

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