diff options
| author | Gerd Hoffmann <kraxel@redhat.com> | 2018-08-27 11:34:44 +0200 |
|---|---|---|
| committer | Gerd Hoffmann <kraxel@redhat.com> | 2018-09-03 13:29:38 +0200 |
| commit | fbb0de795078190a9834b3409e4b009cfb18a6d4 (patch) | |
| tree | 65e82b3e44c500715a6c1045217abc3469ff3530 /drivers/dma-buf/Kconfig | |
| parent | drm: Describe pixel_blend_mode in drm_plane_state (diff) | |
| download | linux-fbb0de795078190a9834b3409e4b009cfb18a6d4.tar.xz linux-fbb0de795078190a9834b3409e4b009cfb18a6d4.zip | |
Add udmabuf misc device
A driver to let userspace turn memfd regions into dma-bufs.
Use case: Allows qemu create dmabufs for the vga framebuffer or
virtio-gpu ressources. Then they can be passed around to display
those guest things on the host. To spice client for classic full
framebuffer display, and hopefully some day to wayland server for
seamless guest window display.
qemu test branch:
https://git.kraxel.org/cgit/qemu/log/?h=sirius/udmabuf
Cc: David Airlie <airlied@linux.ie>
Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20180827093444.23623-1-kraxel@redhat.com
Diffstat (limited to 'drivers/dma-buf/Kconfig')
| -rw-r--r-- | drivers/dma-buf/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/dma-buf/Kconfig b/drivers/dma-buf/Kconfig index ed3b785bae37..338129eb126f 100644 --- a/drivers/dma-buf/Kconfig +++ b/drivers/dma-buf/Kconfig @@ -30,4 +30,12 @@ config SW_SYNC WARNING: improper use of this can result in deadlocking kernel drivers from userspace. Intended for test and debug only. +config UDMABUF + bool "userspace dmabuf misc driver" + default n + depends on DMA_SHARED_BUFFER + help + A driver to let userspace turn memfd regions into dma-bufs. + Qemu can use this to create host dmabufs for guest framebuffers. + endmenu |