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 (Documentation/powerpc/firmware-assisted-dump.rst) is also updated appropriately. Refer to the documentation for flow related details. The patch series is tested with the latest firmware that has MPIPL support included. Changes in v6: * Addressed review comments and also, did a bit of code clean-up. 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 (36): powerpc/fadump: move internal macros/definitions to a new header powerpc/fadump: add helper functions powerpc/fadump: declare helper functions in internal header file powerpc/fadump: Improve fadump documentation powerpc/fadump: use helper functions to reserve/release cpu notes buffer pseries/fadump: move rtas specific definitions to platform code pseries/fadump: introduce callbacks for platform specific operations pseries/fadump: define RTAS register/un-register callback functions pseries/fadump: add source info while displaying region contents 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 powerpc/fadump: improve fadump_reserve_mem() powernv/fadump: register kernel metadata address with opal powernv/fadump: reset metadata address during clean up powernv/fadump: define OPAL 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: make use of memblock's bottom up allocation mode 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 powerpc/fadump: remove RMA_START and RMA_END macros powernv/fadump: support holes in kernel boot memory area Documentation/powerpc/firmware-assisted-dump.rst | 220 ++-- arch/powerpc/Kconfig | 23 arch/powerpc/include/asm/fadump-internal.h | 169 +++ arch/powerpc/include/asm/fadump.h | 194 --- arch/powerpc/include/asm/opal-api.h | 44 + arch/powerpc/include/asm/opal.h | 5 arch/powerpc/kernel/Makefile | 4 arch/powerpc/kernel/fadump.c | 1340 ++++++++++------------ 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 | 636 ++++++++++ arch/powerpc/platforms/powernv/opal-fadump.c | 716 ++++++++++++ arch/powerpc/platforms/powernv/opal-fadump.h | 146 ++ arch/powerpc/platforms/pseries/Makefile | 1 arch/powerpc/platforms/pseries/rtas-fadump.c | 550 +++++++++ arch/powerpc/platforms/pseries/rtas-fadump.h | 114 ++ 17 files changed, 3160 insertions(+), 1012 deletions(-) create mode 100644 arch/powerpc/include/asm/fadump-internal.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