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authorGerd Hoffmann <kraxel@redhat.com>2018-08-27 11:34:44 +0200
committerGerd Hoffmann <kraxel@redhat.com>2018-09-03 13:29:38 +0200
commitfbb0de795078190a9834b3409e4b009cfb18a6d4 (patch)
tree65e82b3e44c500715a6c1045217abc3469ff3530 /Documentation/ioctl
parentb972cece9448c55a2464d61787c955ab28110a40 (diff)
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 'Documentation/ioctl')
-rw-r--r--Documentation/ioctl/ioctl-number.txt1
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
index 13a7c999c04a..f2ac672eb766 100644
--- a/Documentation/ioctl/ioctl-number.txt
+++ b/Documentation/ioctl/ioctl-number.txt
@@ -272,6 +272,7 @@ Code Seq#(hex) Include File Comments
't' 90-91 linux/toshiba.h toshiba and toshiba_acpi SMM
'u' 00-1F linux/smb_fs.h gone
'u' 20-3F linux/uvcvideo.h USB video class host driver
+'u' 40-4f linux/udmabuf.h userspace dma-buf misc device
'v' 00-1F linux/ext2_fs.h conflict!
'v' 00-1F linux/fs.h conflict!
'v' 00-0F linux/sonypi.h conflict!