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vfio-mdev: add back CONFIG_VFIO dependency

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CONFIG_VFIO_MDEV cannot be selected when VFIO itself is
disabled, otherwise we get a link failure:

WARNING: unmet direct dependencies detected for VFIO_MDEV
  Depends on [n]: VFIO [=n]
  Selected by [y]:
  - SAMPLE_VFIO_MDEV_MTTY [=y] && SAMPLES [=y]
  - SAMPLE_VFIO_MDEV_MDPY [=y] && SAMPLES [=y]
  - SAMPLE_VFIO_MDEV_MBOCHS [=y] && SAMPLES [=y]
/home/arnd/cross/arm64/gcc-13.0.1-nolibc/x86_64-linux/bin/x86_64-linux-ld: samples/vfio-mdev/mdpy.o: in function `mdpy_remove':
mdpy.c:(.text+0x1e1): undefined reference to `vfio_unregister_group_dev'
/home/arnd/cross/arm64/gcc-13.0.1-nolibc/x86_64-linux/bin/x86_64-linux-ld: samples/vfio-mdev/mdpy.o: in function `mdpy_probe':
mdpy.c:(.text+0x149e): undefined reference to `_vfio_alloc_device'

Fixes: 8bf8c5ee1f ("vfio-mdev: turn VFIO_MDEV into a selectable symbol")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20230126211211.1762319-1-arnd@kernel.org
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Arnd Bergmann
2023-01-26 22:08:31 +01:00
committed by Alex Williamson
parent 7658aeda33
commit de858a05c9
3 changed files with 7 additions and 1 deletions
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3
samples/Kconfig
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@@ -185,6 +185,7 @@ config SAMPLE_UHID
config SAMPLE_VFIO_MDEV_MTTY
tristate "Build VFIO mtty example mediated device sample code"
depends on VFIO
select VFIO_MDEV
help
Build a virtual tty sample driver for use as a VFIO
@@ -192,6 +193,7 @@ config SAMPLE_VFIO_MDEV_MTTY
config SAMPLE_VFIO_MDEV_MDPY
tristate "Build VFIO mdpy example mediated device sample code"
depends on VFIO
select VFIO_MDEV
help
Build a virtual display sample driver for use as a VFIO
@@ -209,6 +211,7 @@ config SAMPLE_VFIO_MDEV_MDPY_FB
config SAMPLE_VFIO_MDEV_MBOCHS
tristate "Build VFIO mdpy example mediated device sample code"
depends on VFIO
select VFIO_MDEV
select DMA_SHARED_BUFFER
help