From fbb0de795078190a9834b3409e4b009cfb18a6d4 Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Mon, 27 Aug 2018 11:34:44 +0200 Subject: 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 Cc: Tomeu Vizoso Cc: Laurent Pinchart Cc: Daniel Vetter Signed-off-by: Gerd Hoffmann Acked-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/20180827093444.23623-1-kraxel@redhat.com --- Documentation/ioctl/ioctl-number.txt | 1 + 1 file changed, 1 insertion(+) (limited to 'Documentation/ioctl') 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! -- cgit v1.2.3-59-g8ed1b