[PATCH hmm 1/5] mm/hmm: make CONFIG_DEVICE_PRIVATE into a select

Jason Gunthorpe
2020-04-22T00:21:50Z

From: Jason Gunthorpe <jgg@mellanox.com>

There is no reason for a user to select this or not directly - it should
be selected by drivers that are going to use the feature, similar to how
CONFIG_HMM_MIRROR works.

Currently all drivers provide a feature kconfig that will disable use of
DEVICE_PRIVATE in that driver, allowing users to avoid enabling this if
they don't want the overhead.

Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
---
arch/powerpc/Kconfig | 2 +-
drivers/gpu/drm/nouveau/Kconfig | 2 +-
mm/Kconfig | 7 +------
3 files changed, 3 insertions(+), 8 deletions(-)

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 924c541a926008..8de52aefdc74cc 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -455,7 +455,7 @@ config PPC_TRANSACTIONAL_MEM
config PPC_UV
bool "Ultravisor support"
depends on KVM_BOOK3S_HV_POSSIBLE
- depends on DEVICE_PRIVATE
+ select DEVICE_PRIVATE
default n
help
This option paravirtualizes the kernel to run in POWER platforms that
diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig
index d6e4ae1ef7053a..af5793f3e7c2cf 100644
--- a/drivers/gpu/drm/nouveau/Kconfig
+++ b/drivers/gpu/drm/nouveau/Kconfig
@@ -86,10 +86,10 @@ config DRM_NOUVEAU_BACKLIGHT

config DRM_NOUVEAU_SVM
bool "(EXPERIMENTAL) Enable SVM (Shared Virtual Memory) support"
- depends on DEVICE_PRIVATE
depends on DRM_NOUVEAU
depends on MMU
depends on STAGING
+ select DEVICE_PRIVATE
select HMM_MIRROR
select MMU_NOTIFIER
default n
diff --git a/mm/Kconfig b/mm/Kconfig
index c1acc34c1c358c..7ca36bf5f5058e 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -805,15 +805,10 @@ config HMM_MIRROR
depends on MMU

config DEVICE_PRIVATE
- bool "Unaddressable device memory (GPU memory, ...)"
+ bool
depends on ZONE_DEVICE
select DEV_PAGEMAP_OPS

- help
- Allows creation of struct pages to represent unaddressable device
- memory; i.e., memory that is only accessible from the device (or
- group of devices). You likely also want to select HMM_MIRROR.
-
config FRAME_VECTOR
bool

--
2.26.0