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| author | Hans de Goede <hdegoede@redhat.com> | 2024-07-16 17:46:09 +0200 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2024-07-17 09:36:45 +0200 |
| commit | fd820e76e4999b4eee13be87fee25f5ffe357a57 (patch) | |
| tree | 74bd8f5cf37024cb2c99620fa45c967bd96d36a6 /rules.d | |
| parent | id128: refuse --app-specific= if we're listing GPT types (diff) | |
| download | systemd-fd820e76e4999b4eee13be87fee25f5ffe357a57.tar.xz systemd-fd820e76e4999b4eee13be87fee25f5ffe357a57.zip | |
rules: Add uaccess tag to /dev/udmabuf
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
Diffstat (limited to 'rules.d')
| -rw-r--r-- | rules.d/70-uaccess.rules.in | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/rules.d/70-uaccess.rules.in b/rules.d/70-uaccess.rules.in index b82ce04a39..e683bb1114 100644 --- a/rules.d/70-uaccess.rules.in +++ b/rules.d/70-uaccess.rules.in @@ -34,6 +34,8 @@ SUBSYSTEM=="sound", TAG+="uaccess", \ SUBSYSTEM=="video4linux", TAG+="uaccess" SUBSYSTEM=="dvb", TAG+="uaccess" SUBSYSTEM=="media", TAG+="uaccess" +# libcamera software ISP used with some cams requires udmabuf access +KERNEL=="udmabuf", TAG+="uaccess" # industrial cameras, some webcams, camcorders, set-top boxes, TV sets, audio devices, and more SUBSYSTEM=="firewire", TEST=="units", ENV{IEEE1394_UNIT_FUNCTION_MIDI}=="1", TAG+="uaccess" |