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Commit 9c240a7b authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jason Gunthorpe
Browse files

mm/hmm: make HMM_MIRROR an implicit option 

Make HMM_MIRROR an option that is selected by drivers wanting to use it
instead of a user visible option as it is just a low-level implementation
detail.

Link: https://lore.kernel.org/r/20190806160554.14046-15-hch@lst.de


Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarJason Gunthorpe <jgg@mellanox.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@mellanox.com>
parent f442c283

drivers/gpu/drm/amd/amdgpu/Kconfig

+3 −1
Original line number Diff line number Diff line
@@ -27,7 +27,9 @@ config DRM_AMDGPU_CIK 
config DRM_AMDGPU_USERPTR

	bool "Always enable userptr write support"

	depends on DRM_AMDGPU

	depends on HMM_MIRROR

	depends on MMU

	select HMM_MIRROR

	select MMU_NOTIFIER

	help

	  This option selects CONFIG_HMM and CONFIG_HMM_MIRROR if it

	  isn't already selected to enabled full userptr support.

drivers/gpu/drm/nouveau/Kconfig

+3 −1
Original line number Diff line number Diff line
@@ -86,9 +86,11 @@ config DRM_NOUVEAU_SVM 
	bool "(EXPERIMENTAL) Enable SVM (Shared Virtual Memory) support"

	depends on DEVICE_PRIVATE

	depends on DRM_NOUVEAU

	depends on HMM_MIRROR

	depends on MMU

	depends on STAGING

	select HMM_MIRROR

	select MIGRATE_VMA_HELPER

	select MMU_NOTIFIER

	default n

	help

	  Say Y here if you want to enable experimental support for

mm/Kconfig

+6 −8
Original line number Diff line number Diff line
@@ -675,16 +675,14 @@ config MIGRATE_VMA_HELPER 
config DEV_PAGEMAP_OPS

	bool



#

# Helpers to mirror range of the CPU page tables of a process into device page

# tables.

#

config HMM_MIRROR

	bool "HMM mirror CPU page table into a device page table"

	bool

	depends on MMU

	select MMU_NOTIFIER

	help

	  Select HMM_MIRROR if you want to mirror range of the CPU page table of a

	  process into a device page table. Here, mirror means "keep synchronized".

	  Prerequisites: the device must provide the ability to write-protect its

	  page tables (at PAGE_SIZE granularity), and must be able to recover from

	  the resulting potential page faults.

	depends on MMU_NOTIFIER



config DEVICE_PRIVATE

	bool "Unaddressable device memory (GPU memory, ...)"