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| author | Mark Rutland <mark.rutland@arm.com> | 2022-11-03 20:05:19 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2022-11-18 16:56:41 +0300 |
| commit | 94d095ffa0e16bb7f161a2b73bbe5c2795d499a8 (patch) | |
| tree | 414e441cbfac851e75ad6c3f04e33da2f4989a2a /kernel/trace/Kconfig | |
| parent | 0ef86097f127d0d73e19aa4dcf86106105e7db09 (diff) | |
| download | linux-94d095ffa0e16bb7f161a2b73bbe5c2795d499a8.tar.xz | |
ftrace: abstract DYNAMIC_FTRACE_WITH_ARGS accesses
In subsequent patches we'll arrange for architectures to have an
ftrace_regs which is entirely distinct from pt_regs. In preparation for
this, we need to minimize the use of pt_regs to where strictly necessary
in the core ftrace code.
This patch adds new ftrace_regs_{get,set}_*() helpers which can be used
to manipulate ftrace_regs. When CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS=y,
these can always be used on any ftrace_regs, and when
CONFIG_HAVE_DYNAMIC_FTRACE_WITH_ARGS=n these can be used when regs are
available. A new ftrace_regs_has_args(fregs) helper is added which code
can use to check when these are usable.
Co-developed-by: Florent Revest <revest@chromium.org>
Signed-off-by: Florent Revest <revest@chromium.org>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Reviewed-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Link: https://lore.kernel.org/r/20221103170520.931305-4-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'kernel/trace/Kconfig')
| -rw-r--r-- | kernel/trace/Kconfig | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index e9e95c790b8e..2c6611c13f99 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -46,10 +46,10 @@ config HAVE_DYNAMIC_FTRACE_WITH_ARGS bool help If this is set, then arguments and stack can be found from - the pt_regs passed into the function callback regs parameter + the ftrace_regs passed into the function callback regs parameter by default, even without setting the REGS flag in the ftrace_ops. - This allows for use of regs_get_kernel_argument() and - kernel_stack_pointer(). + This allows for use of ftrace_regs_get_argument() and + ftrace_regs_get_stack_pointer(). config HAVE_DYNAMIC_FTRACE_NO_PATCHABLE bool |