[PATCH 5/6] iommu: document missing def_domain_type return

Matthew Rosato
2024-12-09T19:24:28Z

In addition to IOMMU_DOMAIN_DMA, def_domain_type can also return
IOMMU_DOMAIN_DMA_FQ when applicable, else flush queues will never be
used.

Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
---
include/linux/iommu.h | 1 +
1 file changed, 1 insertion(+)

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 05279109c732..d0da1918d2de 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -585,6 +585,7 @@ iommu_copy_struct_from_full_user_array(void *kdst, size_t kdst_entry_size,
* @def_domain_type: device default domain type, return value:
* - IOMMU_DOMAIN_IDENTITY: must use an identity domain
* - IOMMU_DOMAIN_DMA: must use a dma domain
+ * - IOMMU_DOMAIN_DMA_FQ: dma domain with batch invalidation
* - 0: use the default setting
* @default_domain_ops: the default ops for domains
* @remove_dev_pasid: Remove any translation configurations of a specific
--
2.47.0