Commit ce15c13e authored Mar 21, 2025 by Yi Liu Committed by Jason Gunthorpe Mar 25, 2025

iommu/vt-d: Add IOMMU_HWPT_ALLOC_PASID support

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>

parent 4c3f4f43

drivers/iommu/intel/iommu.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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);

drivers/iommu/intel/nested.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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 */