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| author | Lu Baolu <[email protected]> | 2024-09-02 02:27:16 +0000 |
|---|---|---|
| committer | Joerg Roedel <[email protected]> | 2024-09-02 16:14:57 +0000 |
| commit | 2031c469f8161abe74189cb74f50da224f340b71 (patch) | |
| tree | 35f347a59ab93a604d8f4afa8e673ce9b0baa4c8 /drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | |
| parent | iommu/vt-d: Factor out helpers from domain_context_mapping_one() (diff) | |
| download | kernel-2031c469f8161abe74189cb74f50da224f340b71.tar.gz kernel-2031c469f8161abe74189cb74f50da224f340b71.zip | |
iommu/vt-d: Add support for static identity domain
Software determines VT-d hardware support for passthrough translation by
inspecting the capability register. If passthrough translation is not
supported, the device is instructed to use DMA domain for its default
domain.
Add a global static identity domain with guaranteed attach semantics for
IOMMUs that support passthrough translation mode.
The global static identity domain is a dummy domain without corresponding
dmar_domain structure. Consequently, the device's info->domain will be
NULL with the identity domain is attached. Refactor the code accordingly.
Signed-off-by: Lu Baolu <[email protected]>
Reviewed-by: Jason Gunthorpe <[email protected]>
Reviewed-by: Kevin Tian <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Joerg Roedel <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_object.c')
0 files changed, 0 insertions, 0 deletions