Firmware-Assisted Dump (FADump) is currently supported only on pSeries
platform. This patch series adds support for PowerNV platform too.
The first few patches refactor the FADump code to make use of common
code across multiple platforms. Then basic FADump support is added for
PowerNV platform. Followed by patches to honour reserved-ranges DT node
while reserving/releasing memory used by FADump. The subsequent patch
processes CPU state data provided by firmware to create and append core
notes to the ELF core file and the next patch adds support to preserve
crash data for subsequent boots (useful in cases like petitboot). The
subsequent patches add support to export opalcore. opalcore makes
debugging of failures in OPAL code easier. Firmware-Assisted Dump
documentation is also updated appropriately.
The patch series is tested with the latest firmware plus the below skiboot
changes, accepted upstream recently, for MPIPL support:
https://patchwork.ozlabs.org/project/skiboot/list/?series=119169
("MPIPL support")
Changes in v5:
* Split the patches further.
* Rebased to latest upstream kernel version.
* Updated the patches based on discussions with mahesh on V4.
---
Hari Bathini (31):
powerpc/fadump: move internal macros/definitions to a new header
powerpc/fadump: move internal code to a new file
powerpc/fadump: Improve fadump documentation
pseries/fadump: move rtas specific definitions to platform code
pseries/fadump: introduce callbacks for platform specific operations
pseries/fadump: define register/un-register callback functions
powerpc/fadump: release all the memory above boot memory size
pseries/fadump: move out platform specific support from generic code
powerpc/fadump: use FADump instead of fadump for how it is pronounced
opal: add MPIPL interface definitions
powernv/fadump: add fadump support on powernv
powernv/fadump: register kernel metadata address with opal
powernv/fadump: reset metadata address during clean up
powernv/fadump: define register/un-register callback functions
powernv/fadump: support copying multiple kernel boot memory regions
powernv/fadump: process the crashdump by exporting it as /proc/vmcore
powernv/fadump: Warn before processing partial crashdump
powernv/fadump: handle invalidation of crashdump and re-registraion
powerpc/fadump: Update documentation about OPAL platform support
powerpc/fadump: use smaller offset while finding memory for reservation
powernv/fadump: process architected register state data provided by
firmware
powerpc/fadump: make crash memory ranges array allocation generic
powerpc/fadump: consider reserved ranges while releasing memory
powerpc/fadump: improve how crashed kernel's memory is reserved
powernv/fadump: add support to preserve crash data on FADUMP disabled
kernel
powerpc/fadump: update documentation about CONFIG_PRESERVE_FA_DUMP
powernv/opalcore: export /sys/firmware/opal/core for analysing opal
crashes
powernv/opalcore: provide an option to invalidate /sys/firmware/opal/core
file
powerpc/fadump: consider f/w load area
powernv/fadump: update documentation about option to release opalcore
powernv/fadump: support holes in kernel boot memory area
Documentation/powerpc/firmware-assisted-dump.rst | 204 ++--
arch/powerpc/Kconfig | 23
arch/powerpc/include/asm/fadump.h | 190 ---
arch/powerpc/include/asm/opal-api.h | 50 +
arch/powerpc/include/asm/opal.h | 6
arch/powerpc/kernel/Makefile | 6
arch/powerpc/kernel/fadump-common.c | 149 +++
arch/powerpc/kernel/fadump-common.h | 192 +++
arch/powerpc/kernel/fadump.c | 1272 ++++++++--------------
arch/powerpc/kernel/prom.c | 4
arch/powerpc/platforms/powernv/Makefile | 3
arch/powerpc/platforms/powernv/opal-call.c | 3
arch/powerpc/platforms/powernv/opal-core.c | 633 +++++++++++
arch/powerpc/platforms/powernv/opal-fadump.c | 715 ++++++++++++
arch/powerpc/platforms/powernv/opal-fadump.h | 148 +++
arch/powerpc/platforms/pseries/Makefile | 1
arch/powerpc/platforms/pseries/rtas-fadump.c | 593 ++++++++++
arch/powerpc/platforms/pseries/rtas-fadump.h | 117 ++
18 files changed, 3267 insertions(+), 1042 deletions(-)
create mode 100644 arch/powerpc/kernel/fadump-common.c
create mode 100644 arch/powerpc/kernel/fadump-common.h
create mode 100644 arch/powerpc/platforms/powernv/opal-core.c
create mode 100644 arch/powerpc/platforms/powernv/opal-fadump.c
create mode 100644 arch/powerpc/platforms/powernv/opal-fadump.h
create mode 100644 arch/powerpc/platforms/pseries/rtas-fadump.c
create mode 100644 arch/powerpc/platforms/pseries/rtas-fadump.h
