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sample: vfio bochs vbe display (host device for bochs-drm)

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Display device, demo-ing the vfio dmabuf display interface
(VFIO_GFX_PLANE_TYPE_DMABUF).  Compatible enough to qemu stdvga
that bochs-drm.ko can be used as guest driver.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Gerd Hoffmann 2018-05-11 09:05:04 -06:00 committed by Alex Williamson
parent cacade1946
commit a5e6e6505f
3 changed files with 1420 additions and 0 deletions
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13
samples/Kconfig
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@ -132,6 +132,19 @@ config SAMPLE_VFIO_MDEV_MDPY_FB
help
Guest fbdev driver for the virtual display sample driver.
config SAMPLE_VFIO_MDEV_MBOCHS
tristate "Build VFIO mdpy example mediated device sample code -- loadable modules only"
depends on VFIO_MDEV_DEVICE && m
help
Build a virtual display sample driver for use as a VFIO
mediated device. It supports the region display interface
(VFIO_GFX_PLANE_TYPE_DMABUF).
Emulate enough of qemu stdvga to make bochs-drm.ko happy.
That is basically the vram memory bar and the bochs dispi
interface vbe registers in the mmio register bar.
Specifically it does *not* include any legacy vga stuff.
Device looks a lot like "qemu -device secondary-vga".
config SAMPLE_STATX
bool "Build example extended-stat using code"
depends on BROKEN

1
samples/vfio-mdev/Makefile
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@ -1,3 +1,4 @@
obj-$(CONFIG_SAMPLE_VFIO_MDEV_MTTY) += mtty.o
obj-$(CONFIG_SAMPLE_VFIO_MDEV_MDPY) += mdpy.o
obj-$(CONFIG_SAMPLE_VFIO_MDEV_MDPY_FB) += mdpy-fb.o
obj-$(CONFIG_SAMPLE_VFIO_MDEV_MBOCHS) += mbochs.o

1406
samples/vfio-mdev/mbochs.c Normal file
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