[v6,1/5] iommu: Add DOMAIN_ATTR_SPLIT_TABLES
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Message ID 20200409233350.6343-2-jcrouse@codeaurora.org
State New
Headers show
Series
  • iommu/arm-smmu: Split pagetable support for arm-smmu-v2
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Commit Message

Jordan Crouse April 9, 2020, 11:33 p.m. UTC
Add a new attribute to enable and query the state of split pagetables
for the domain.

Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
---

 include/linux/iommu.h | 2 ++
 1 file changed, 2 insertions(+)

Patch
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diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 7ef8b0bda695..d0f96f748a00 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -126,6 +126,8 @@  enum iommu_attr {
 	DOMAIN_ATTR_FSL_PAMUV1,
 	DOMAIN_ATTR_NESTING,	/* two stages of translation */
 	DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE,
+	/* Enable split pagetables (for example, TTBR1 on arm-smmu) */
+	DOMAIN_ATTR_SPLIT_TABLES,
 	DOMAIN_ATTR_MAX,
 };