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iommu/vt-d: Add IOMMU_HWPT_ALLOC_PASID support

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Intel iommu driver just treats it as a nop since Intel VT-d does not have
special requirement on domains attached to either the PASID or RID of a
PASID-capable device.

Link: https://patch.msgid.link/r/20250321171940.7213-14-yi.l.liu@intel.com
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Tested-by: Nicolin Chen <nicolinc@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Yi Liu 2025-03-21 10:19:35 -07:00 committed by Jason Gunthorpe
parent 4c3f4f432c
commit ce15c13e7a
2 changed files with 3 additions and 2 deletions
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3
drivers/iommu/intel/iommu.c
View File

@ -3338,7 +3338,8 @@ intel_iommu_domain_alloc_paging_flags(struct device *dev, u32 flags,
bool first_stage;
if (flags &
(~(IOMMU_HWPT_ALLOC_NEST_PARENT | IOMMU_HWPT_ALLOC_DIRTY_TRACKING)))
(~(IOMMU_HWPT_ALLOC_NEST_PARENT | IOMMU_HWPT_ALLOC_DIRTY_TRACKING |
IOMMU_HWPT_ALLOC_PASID)))
return ERR_PTR(-EOPNOTSUPP);
if (nested_parent && !nested_supported(iommu))
return ERR_PTR(-EOPNOTSUPP);

2
drivers/iommu/intel/nested.c
View File

@ -198,7 +198,7 @@ intel_iommu_domain_alloc_nested(struct device *dev, struct iommu_domain *parent,
struct dmar_domain *domain;
int ret;
if (!nested_supported(iommu) || flags)
if (!nested_supported(iommu) || flags & ~IOMMU_HWPT_ALLOC_PASID)
return ERR_PTR(-EOPNOTSUPP);
/* Must be nested domain */