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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 |
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| .. | ||
| 50-udev-default.rules.in | ||
| 60-autosuspend.rules | ||
| 60-block.rules | ||
| 60-cdrom_id.rules | ||
| 60-dmi-id.rules | ||
| 60-drm.rules | ||
| 60-evdev.rules | ||
| 60-fido-id.rules | ||
| 60-infiniband.rules | ||
| 60-input-id.rules | ||
| 60-persistent-alsa.rules | ||
| 60-persistent-input.rules | ||
| 60-persistent-media-controller.rules | ||
| 60-persistent-storage-mtd.rules | ||
| 60-persistent-storage-tape.rules | ||
| 60-persistent-storage.rules.in | ||
| 60-persistent-v4l.rules | ||
| 60-sensor.rules | ||
| 60-serial.rules | ||
| 64-btrfs.rules.in | ||
| 70-camera.rules | ||
| 70-joystick.rules | ||
| 70-memory.rules | ||
| 70-mouse.rules | ||
| 70-power-switch.rules | ||
| 70-touchpad.rules | ||
| 70-uaccess.rules.in | ||
| 71-seat.rules.in | ||
| 73-seat-late.rules.in | ||
| 75-net-description.rules | ||
| 75-probe_mtd.rules | ||
| 78-sound-card.rules | ||
| 80-drivers.rules | ||
| 80-net-setup-link.rules | ||
| 81-net-dhcp.rules | ||
| 82-net-auto-link-local.rules | ||
| 90-iocost.rules | ||
| 90-vconsole.rules.in | ||
| 99-systemd.rules.in | ||
| meson.build | ||
| README | ||
Files in this directory contain configuration for systemd-udevd.service, a daemon that manages symlinks to device nodes, permissions of devices nodes, emits device events for userspace, and renames network interfaces. See man:udev(7) for an overview of the configuration file format, and man:systemd-udevd.service(8) for a description of service itself. Use 'systemd-analyze cat-config udev/rules.d' to display the effective config.