diff options
Diffstat (limited to 'Documentation/powerpc')
| -rw-r--r-- | Documentation/powerpc/firmware-assisted-dump.rst | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/Documentation/powerpc/firmware-assisted-dump.rst b/Documentation/powerpc/firmware-assisted-dump.rst index 0455a78486d5..345a3405206e 100644 --- a/Documentation/powerpc/firmware-assisted-dump.rst +++ b/Documentation/powerpc/firmware-assisted-dump.rst @@ -112,13 +112,13 @@ to ensure that crash data is preserved to process later. -- On OPAL based machines (PowerNV), if the kernel is build with CONFIG_OPAL_CORE=y, OPAL memory at the time of crash is also - exported as /sys/firmware/opal/core file. This procfs file is + exported as /sys/firmware/opal/mpipl/core file. This procfs file is helpful in debugging OPAL crashes with GDB. The kernel memory used for exporting this procfs file can be released by echo'ing - '1' to /sys/kernel/fadump_release_opalcore node. + '1' to /sys/firmware/opal/mpipl/release_core node. e.g. - # echo 1 > /sys/kernel/fadump_release_opalcore + # echo 1 > /sys/firmware/opal/mpipl/release_core Implementation details: ----------------------- @@ -283,14 +283,17 @@ Here is the list of files under kernel sysfs: enhanced to use this interface to release the memory reserved for dump and continue without 2nd reboot. - /sys/kernel/fadump_release_opalcore +Note: /sys/kernel/fadump_release_opalcore sysfs has moved to + /sys/firmware/opal/mpipl/release_core + + /sys/firmware/opal/mpipl/release_core This file is available only on OPAL based machines when FADump is active during capture kernel. This is used to release the memory - used by the kernel to export /sys/firmware/opal/core file. To + used by the kernel to export /sys/firmware/opal/mpipl/core file. To release this memory, echo '1' to it: - echo 1 > /sys/kernel/fadump_release_opalcore + echo 1 > /sys/firmware/opal/mpipl/release_core Here is the list of files under powerpc debugfs: (Assuming debugfs is mounted on /sys/kernel/debug directory.) |