[PATCH v7 08/13] iommu/vt-d: Add IOMMU_HWPT_ALLOC_PASID support

[Yi Liu <yi.l.liu@intel.com>]

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.

Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
 drivers/iommu/intel/iommu.c  | 3 ++-
 drivers/iommu/intel/nested.c | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index cc46098f875b..7bc890609b90 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -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);
diff --git a/drivers/iommu/intel/nested.c b/drivers/iommu/intel/nested.c
index aba92c00b427..6ac5c534bef4 100644
--- a/drivers/iommu/intel/nested.c
+++ b/drivers/iommu/intel/nested.c
@@ -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 */
-- 
2.34.1