Sometimes firmware sizes can be in ten's of MB's and reading all the memory during coredump can consume lot of time and memory. Introducing support for mini-dumps. Mini-dump contains smallest amount of useful information, that could help to debug subsystem crashes. During bootup memory is allocated in SMEM (Shared memory) in the form of a table that contains the physical addresses and sizes of the regions that are supposed to be collected during coredump. This memory is shared amongst all processors in a Qualcomm platform, so all remoteprocs fill in their entry in the global table once they are out of reset. This patch series adds support for parsing the global minidump table and uses the current coredump frameork to expose this memory to userspace during remoteproc's recovery.
This patch series also integrates the patch: https://patchwork.kernel.org/patch/11695541/ sent by Siddharth. Changelog: v2 -> v3: - Refactored code to remove dependency on Qualcomm configs. - Renamed do_rproc_minidump to rproc_minidump and marked as exported symbol. v1 -> v2: - 3 kernel test robot warnings have been resolved. - Introduced priv_cleanup op in order to making the cleaning of private elements used by the remoteproc more readable. - Removed rproc_cleanup_priv as it is no longer needed. - Switched to if/else format for rproc_alloc in order to keep the static const decalaration of adsp_minidump_ops. Siddharth Gupta (3): remoteproc: core: Add ops to enable custom coredump functionality remoteproc: qcom: Add capability to collect minidumps remoteproc: qcom: Add minidump id for sm8150 modem remoteproc drivers/remoteproc/qcom_minidump.h | 64 +++++++++++++ drivers/remoteproc/qcom_q6v5_pas.c | 107 ++++++++++++++++++++- drivers/remoteproc/remoteproc_core.c | 6 +- drivers/remoteproc/remoteproc_coredump.c | 138 ++++++++++++++++++++++++++++ drivers/remoteproc/remoteproc_elf_helpers.h | 27 ++++++ include/linux/remoteproc.h | 5 + 6 files changed, 344 insertions(+), 3 deletions(-) create mode 100644 drivers/remoteproc/qcom_minidump.h -- Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project
