[PATCH v2 7/8] 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 | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 1c9e539f15a7..e6b4460c485d 100644
--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -2395,6 +2395,16 @@ static struct iommu_domain *amd_iommu_domain_alloc(unsigned int type)
 	return domain;
 }
 
+/*
+ * Allocate domain with default (amd_iommu_pgtable) page table type. Core will
+ * call domain_alloc_user() interface to allocate PASID capable 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,
@@ -2858,6 +2868,7 @@ const struct iommu_ops amd_iommu_ops = {
 	.capable = amd_iommu_capable,
 	.blocked_domain = &blocked_domain,
 	.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