[PATCH v13 01/11] mm/Kconfig: changes for migrate on fault for device pages

From: Mika Penttilä <[email protected]>

HMM depends on MMU notifiers. With the unified HMM/migrate_device
page table walk migrate_device needs HMM enabled.
Enable them explicitly to avoid breaking random configs.

Cc: Andrew Morton <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Cc: "Liam R. Howlett" <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Michal Hocko <[email protected]>
Signed-off-by: Mika Penttilä <[email protected]>
Acked-by: David Hildenbrand (Arm) <[email protected]>
---
 mm/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/Kconfig b/mm/Kconfig
index 9e0ca4824905..7647671f37f0 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -699,6 +699,7 @@ config MIGRATION
 
 config DEVICE_MIGRATION
 	def_bool MIGRATION && ZONE_DEVICE
+	select HMM_MIRROR
 
 config ARCH_ENABLE_HUGEPAGE_MIGRATION
 	bool
@@ -1260,6 +1261,7 @@ config ZONE_DEVICE
 config HMM_MIRROR
 	bool
 	depends on MMU
+	select MMU_NOTIFIER
 
 config GET_FREE_REGION
 	bool
-- 
2.55.0