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iommu/iova: Allow compiling the library without IOMMU support 

Drivers such as the Intel IPU3 ImgU driver use the IOVA library to manage
the device's own virtual address space while not implementing the IOMMU
API. Currently the IOVA library is only compiled if the IOMMU support is
enabled, resulting into a failure during linking due to missing symbols.

Fix this by defining IOVA library Kconfig bits independently of IOMMU
support configuration, and descending to the iommu directory
unconditionally during the build.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Sakari Ailus 2019-01-02 23:16:57 +02:00 committed by Joerg Roedel
parent bfeffd1552
commit bd3c2e66e4
2 changed files with 5 additions and 4 deletions
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2
drivers/Makefile
View File

@ -56,7 +56,7 @@ obj-y += tty/
obj-y += char/
# iommu/ comes before gpu as gpu are using iommu controllers
obj-$(CONFIG_IOMMU_SUPPORT) += iommu/
obj-y += iommu/
# gpu/ comes after char for AGP vs DRM startup and after iommu
obj-y += gpu/

7
drivers/iommu/Kconfig
View File

@ -1,3 +1,7 @@
# The IOVA library may also be used by non-IOMMU_API users
config IOMMU_IOVA
tristate
# IOMMU_API always gets selected by whoever wants it.
config IOMMU_API
bool
@ -81,9 +85,6 @@ config IOMMU_DEFAULT_PASSTHROUGH
If unsure, say N here.
config IOMMU_IOVA
tristate
config OF_IOMMU
def_bool y
depends on OF && IOMMU_API