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authorLinus Torvalds <torvalds@linux-foundation.org>2020-04-05 11:12:59 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-04-05 11:12:59 -0700
commitd38c07afc356ddebaa3ed8ecb3f553340e05c969 (patch)
tree04eb76124d4d5af7518e6e513fb86169051d179c /Documentation/powerpc
parent31c0aa87ec8a30b1e9e4cf862905a369560f7705 (diff)
parentc17eb4dca5a353a9dbbb8ad6934fe57af7165e91 (diff)
downloadlinux-d38c07afc356ddebaa3ed8ecb3f553340e05c969.tar.bz2
Merge tag 'powerpc-5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc updates from Michael Ellerman: "Slightly late as I had to rebase mid-week to insert a bug fix: - A large series from Nick for 64-bit to further rework our exception vectors, and rewrite portions of the syscall entry/exit and interrupt return in C. The result is much easier to follow code that is also faster in general. - Cleanup of our ptrace code to split various parts out that had become badly intertwined with #ifdefs over the years. - Changes to our NUMA setup under the PowerVM hypervisor which should hopefully avoid non-sensical topologies which can lead to warnings from the workqueue code and other problems. - MAINTAINERS updates to remove some of our old orphan entries and update the status of others. - Quite a few other small changes and fixes all over the map. Thanks to: Abdul Haleem, afzal mohammed, Alexey Kardashevskiy, Andrew Donnellan, Aneesh Kumar K.V, Balamuruhan S, Cédric Le Goater, Chen Zhou, Christophe JAILLET, Christophe Leroy, Christoph Hellwig, Clement Courbet, Daniel Axtens, David Gibson, Douglas Miller, Fabiano Rosas, Fangrui Song, Ganesh Goudar, Gautham R. Shenoy, Greg Kroah-Hartman, Greg Kurz, Gustavo Luiz Duarte, Hari Bathini, Ilie Halip, Jan Kara, Joe Lawrence, Joe Perches, Kajol Jain, Larry Finger, Laurentiu Tudor, Leonardo Bras, Libor Pechacek, Madhavan Srinivasan, Mahesh Salgaonkar, Masahiro Yamada, Masami Hiramatsu, Mauricio Faria de Oliveira, Michael Neuling, Michal Suchanek, Mike Rapoport, Nageswara R Sastry, Nathan Chancellor, Nathan Lynch, Naveen N. Rao, Nicholas Piggin, Nick Desaulniers, Oliver O'Halloran, Po-Hsu Lin, Pratik Rajesh Sampat, Rasmus Villemoes, Ravi Bangoria, Roman Bolshakov, Sam Bobroff, Sandipan Das, Santosh S, Sedat Dilek, Segher Boessenkool, Shilpasri G Bhat, Sourabh Jain, Srikar Dronamraju, Stephen Rothwell, Tyrel Datwyler, Vaibhav Jain, YueHaibing" * tag 'powerpc-5.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (158 commits) powerpc: Make setjmp/longjmp signature standard powerpc/cputable: Remove unnecessary copy of cpu_spec->oprofile_type powerpc: Suppress .eh_frame generation powerpc: Drop -fno-dwarf2-cfi-asm powerpc/32: drop unused ISA_DMA_THRESHOLD powerpc/powernv: Add documentation for the opal sensor_groups sysfs interfaces selftests/powerpc: Fix try-run when source tree is not writable powerpc/vmlinux.lds: Explicitly retain .gnu.hash powerpc/ptrace: move ptrace_triggered() into hw_breakpoint.c powerpc/ptrace: create ppc_gethwdinfo() powerpc/ptrace: create ptrace_get_debugreg() powerpc/ptrace: split out ADV_DEBUG_REGS related functions. powerpc/ptrace: move register viewing functions out of ptrace.c powerpc/ptrace: split out TRANSACTIONAL_MEM related functions. powerpc/ptrace: split out SPE related functions. powerpc/ptrace: split out ALTIVEC related functions. powerpc/ptrace: split out VSX related functions. powerpc/ptrace: drop PARAMETER_SAVE_AREA_OFFSET powerpc/ptrace: drop unnecessary #ifdefs CONFIG_PPC64 powerpc/ptrace: remove unused header includes ...
Diffstat (limited to 'Documentation/powerpc')
-rw-r--r--Documentation/powerpc/firmware-assisted-dump.rst32
1 files changed, 26 insertions, 6 deletions
diff --git a/Documentation/powerpc/firmware-assisted-dump.rst b/Documentation/powerpc/firmware-assisted-dump.rst
index 0455a78486d5..b3f3ee135dbe 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:
-----------------------
@@ -268,6 +268,11 @@ Here is the list of files under kernel sysfs:
be handled and vmcore will not be captured. This interface can be
easily integrated with kdump service start/stop.
+ /sys/kernel/fadump/mem_reserved
+
+ This is used to display the memory reserved by FADump for saving the
+ crash dump.
+
/sys/kernel/fadump_release_mem
This file is available only when FADump is active during
second kernel. This is used to release the reserved memory
@@ -283,14 +288,29 @@ 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
+
+Note: The following FADump sysfs files are deprecated.
+
++----------------------------------+--------------------------------+
+| Deprecated | Alternative |
++----------------------------------+--------------------------------+
+| /sys/kernel/fadump_enabled | /sys/kernel/fadump/enabled |
++----------------------------------+--------------------------------+
+| /sys/kernel/fadump_registered | /sys/kernel/fadump/registered |
++----------------------------------+--------------------------------+
+| /sys/kernel/fadump_release_mem | /sys/kernel/fadump/release_mem |
++----------------------------------+--------------------------------+
Here is the list of files under powerpc debugfs:
(Assuming debugfs is mounted on /sys/kernel/debug directory.)