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ftrace: Store direct called addresses in their ops

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All direct calls are now registered using the register_ftrace_direct API
so each ops can jump to only one direct-called trampoline.

By storing the direct called trampoline address directly in the ops we
can save one hashmap lookup in the direct call ops and implement arm64
direct calls on top of call ops.

Link: https://lkml.kernel.org/r/20230321140424.345218-6-revest@chromium.org

Signed-off-by: Florent Revest <revest@chromium.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
This commit is contained in:
Florent Revest
2023-03-21 15:04:22 +01:00
committed by Steven Rostedt (Google)
parent da8bdfbd42
commit dbaccb618f
2 changed files with 8 additions and 2 deletions
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3
include/linux/ftrace.h
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@@ -321,6 +321,9 @@ struct ftrace_ops {
unsigned long trampoline_size;
struct list_head list;
ftrace_ops_func_t ops_func;
#ifdef CONFIG_DYNAMIC_FTRACE_WITH_DIRECT_CALLS
unsigned long direct_call;
#endif
#endif
};