The kfd device is used for running compute workloads on AMD
GPUs. Users that are logged in should be able to run compute
so tag them like other DRM and ACCEL devices are.
When systemd is compiled with group-render-mode=0660, only the active seat
gets access to the render devices through uaccess. Remote desktop sessions
like gnome-remote-desktop would be left with no hardware rendering, because
those sessions are not associated with a seat.
Tag the render nodes with "xaccess" so that access is also granted to remote
sessions created with XDG_SESSION_EXTRA_DEVICE_ACCESS=1
Give access to USB/Bluetooth lights such as the Logitech Litra family of
devices.
The Logitech devices in particular are accessible through USB
and Bluetooth.
According to https://en.wikipedia.org/wiki/3Dconnexion, 3D mice are:
human interface devices for manipulating and navigating
computer-generated 3D imagery. These devices are often referred to as
3D motion controllers, 3D navigation devices, 6DOF devices (six
degrees of freedom) or a 3D mouse.
Applications that want to support 3D mice on Linux are expected to
either use spacenavd and its library, or consume the HID output
directly.
This patch makes it possible for a number of applications that use 3D
mice directly to work out of the box, such as PrusaSlicer and its
derivatives.
In some cases userspace may need to create dmabuffers from userspace
on such example is the software ISP part of libcamera which needs to
allocate dma-buffers for the output of the software ISP.
At first the plan was to allow console users access to /dev/dma_heap/*,
this was discussed with various kernel folks here:
https://lore.kernel.org/all/bb372250-e8b8-4458-bc99-dd8365b06991@redhat.com/
Giving console users access to the dma_heap's was deemed a bad idea
because memory allocated this way is not accounted in cgroup limits.
Giving access to /dev/udmabuf OTOH was deemed acceptable so that
is what this patch adds.
Resolves: #32662
Tim Schumacher
Mario Limonciello
Alessandro Astone
LuK1337
Bastien Nocera
vdovhanych
Hans de Goede
Zbigniew Jędrzejewski-Szmek