iommu: add self-consistency tests to ARM LPAE IO page table allocator

This patch adds a series of basic self-consistency tests to the ARM LPAE
IO page table allocator that exercise corner cases in map/unmap, as well
as testing all valid configurations of pagesize, ias and stage.

Signed-off-by: Will Deacon <will.deacon@arm.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index 306454fbc52d..9fd9909867cd 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -28,6 +28,15 @@ config IOMMU_IO_PGTABLE_LPAE
           sizes at both stage-1 and stage-2, as well as address spaces
           up to 48-bits in size.
 
+config IOMMU_IO_PGTABLE_LPAE_SELFTEST
+        bool "LPAE selftests"
+        depends on IOMMU_IO_PGTABLE_LPAE
+        help
+          Enable self-tests for LPAE page table allocator. This performs
+          a series of page-table consistency checks during boot.
+
+          If unsure, say N here.
+
 endmenu
 
 config OF_IOMMU