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| author | Lu Baolu <baolu.lu@linux.intel.com> | 2024-09-02 10:27:11 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2024-09-02 18:14:54 +0200 |
| commit | 184bee388d4661c3fea633f135a5c45ff03c7ec6 (patch) | |
| tree | c4966ec785c51be8830e3b78213cdebece4f7812 /drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | |
| parent | 7c626ce4bae1ac14f60076d00eafe71af30450ba (diff) | |
iommu/vt-d: Require DMA domain if hardware not support passthrough
The iommu core defines the def_domain_type callback to query the iommu
driver about hardware capability and quirks. The iommu driver should
declare IOMMU_DOMAIN_DMA requirement for hardware lacking pass-through
capability.
Earlier VT-d hardware implementations did not support pass-through
translation mode. The iommu driver relied on a paging domain with all
physical system memory addresses identically mapped to the same IOVA
to simulate pass-through translation before the def_domain_type was
introduced and it has been kept until now. It's time to adjust it now
to make the Intel iommu driver follow the def_domain_type semantics.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Link: https://lore.kernel.org/r/20240809055431.36513-2-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c')
0 files changed, 0 insertions, 0 deletions