Hi, I cannot really comment on mips arch specifics but few words from the live patching perspective. On Mon, 1 Mar 2021, Jinyang He wrote: > Add the basic code of livepatch. livepatch is temporarily unavailable. > Two core functions are missing, one is DYNAMIC_FTRACE_WITH_REGS, and > another is save_stack_trace_tsk_reliable(). > `Huang Pei <huangpei@xxxxxxxxxxx>` is doing for ftrace. He will use > `-fpatchable-function-entry` to achieve more complete ftrace. DYNAMIC_FTRACE_WITH_ARGS has been introduced recently, so you might also look at that. As far as the live patching is concerned, DYNAMIC_FTRACE_WITH_ARGS is sufficient. > save_stack_trace_tsk_reliable() currently has difficulties. This function > may be improved in the future, but that seems to be a long time away. > This is also the reason for delivering this RFC. Hope to get any help. You may want to look at Documentation/livepatch/reliable-stacktrace.rst which nicely describes the requirements for the reliable stacktraces. Regards Miroslav
