[PATCH 5/5] iommu/amd: Add iommu_ops->domain_alloc_paging support

[Vasant Hegde <vasant.hegde@amd.com>]

Add support to allocate paging domain. Note that core will call
domain_alloc_user() to allocate PASID capable domain. Hence its not
checking device capability and allocates page table based on
amd_iommu_pgtable.

Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
---
 drivers/iommu/amd/iommu.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index a4e6789f0487..7bd1ce5469ae 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -2437,6 +2437,12 @@ static struct iommu_domain *amd_iommu_domain_alloc(unsigned int type)
 	return domain;
 }
 
+static struct iommu_domain *amd_iommu_domain_alloc_paging(struct device *dev)
+{
+	return do_iommu_domain_alloc(IOMMU_DOMAIN_DMA,
+				     dev, 0, amd_iommu_pgtable);
+}
+
 static struct iommu_domain *
 amd_iommu_domain_alloc_user(struct device *dev, u32 flags,
 			    struct iommu_domain *parent,
@@ -2879,6 +2885,7 @@ static int amd_iommu_dev_disable_feature(struct device *dev,
 const struct iommu_ops amd_iommu_ops = {
 	.capable = amd_iommu_capable,
 	.domain_alloc = amd_iommu_domain_alloc,
+	.domain_alloc_paging = amd_iommu_domain_alloc_paging,
 	.domain_alloc_user = amd_iommu_domain_alloc_user,
 	.domain_alloc_sva = amd_iommu_domain_alloc_sva,
 	.probe_device = amd_iommu_probe_device,
-- 
2.31.1