On Thu, 20 Dec 2018 at 21:20, StDenis, Tom <Tom.StDenis@xxxxxxx> wrote: > > Sorry I didn't mean to be dismissive. It's just not a bug in umr though. > > On Fedora I can access those files as root just fine: > > tom@fx8:~$ sudo bash > [sudo] password for tom: > root@fx8:/home/tom# cd /sys/kernel/debug/dri/0 > root@fx8:/sys/kernel/debug/dri/0# xxd -e amdgpu_gca_config > 00000000: 00000003 00000001 00000004 0000000b ................ > 00000010: 00000001 00000002 00000004 00000100 ................ > 00000020: 00000020 00000008 00000020 00000100 ....... ....... > 00000030: 00000030 000004c0 00000000 00000003 0............... > 00000040: 00000000 00000000 00000000 00000000 ................ > 00000050: 00000000 00000000 24000042 00000002 ........B..$.... > 00000060: 00000001 00004100 017f9fcf 0000008e .....A.......... > 00000070: 00000001 000015dd 000000c6 0000d000 ................ > 00000080: 00001458 X... > root@fx8:/sys/kernel/debug/dri/0# > > There must be some sort of ACL or something going on here. > > Tom > Tom, which Fedora version do you tried and with which kernel? I am tried several kernels from old 4.19-rc2 to fresh 4.20-rc7 and every time when I tried run `# cat /sys/kernel/debug/dri/0/amdgpu_gca_config` I got message that "Operation not permitted". I try understand difference with our setups. If you use default kernel it means that kernel options between our setups are same. Difference only in hardware and mounted file systems. P.S. I am also tried ask how to manage ACL in debugfs in platform-driver-x86 mail list, but no one answer. -- Best Regards, Mike Gavrilov.
