[PATCH v13 06/12] x86: hw_breakpoint: Add a kconfig to clarify when a breakpoint fires
"Masami Hiramatsu (Google)" <[email protected]>
| Newsgroups | org.kernel.vger.linux-trace-kernel,org.kernel.vger.linux-doc,org.kernel.vger.linux-kernel,org.kernel.vger.linux-perf-users |
|---|---|
| Message-ID | <178739065859.1520941.7359422308748763102.stgit@devnote2> |
From: Masami Hiramatsu (Google) <[email protected]> Add CONFIG_HAVE_POST_BREAKPOINT_HOOK which indicates the hw_breakpoint on that architecture fires after the target memory has been modified. This is currently x86 only behavior. Signed-off-by: Masami Hiramatsu (Google) <[email protected]> Reviewed-by: Jinchao Wang <[email protected]> --- Changes in v11: - Move select to alphabetically sorted place. --- arch/Kconfig | 10 ++++++++++ arch/x86/Kconfig | 1 + kernel/trace/Kconfig | 1 + 3 files changed, 12 insertions(+) diff --git a/arch/Kconfig b/arch/Kconfig index bea383408e32..a096952987a8 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -457,6 +457,16 @@ config HAVE_MIXED_BREAKPOINTS_REGS Select this option if your arch implements breakpoints under the latter fashion. +config HAVE_POST_BREAKPOINT_HOOK + bool + depends on HAVE_HW_BREAKPOINT + help + Depending on the arch implementation of hardware breakpoints, + some of them provide breakpoint hook after the target memory + is modified. + Select this option if your arch implements breakpoints overflow + handler hooks after the target memory is modified. + config HAVE_MODIFY_LOCAL_HW_BREAKPOINT_ADDR bool depends on HAVE_HW_BREAKPOINT diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 33908103d9a0..533010ab29a9 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -287,6 +287,7 @@ config X86 select MMU_GATHER_RCU_TABLE_FREE select MMU_GATHER_MERGE_VMAS select HAVE_POSIX_CPU_TIMERS_TASK_WORK + select HAVE_POST_BREAKPOINT_HOOK select HAVE_REGS_AND_STACK_ACCESS_API select HAVE_RELIABLE_STACKTRACE if UNWINDER_ORC || STACK_VALIDATION select HAVE_FUNCTION_ARG_ACCESS_API diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index b58c2565024f..d9b6fa5c35d9 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -866,6 +866,7 @@ config WPROBE_EVENTS bool "Enable wprobe-based dynamic events" depends on TRACING depends on HAVE_HW_BREAKPOINT + depends on HAVE_POST_BREAKPOINT_HOOK select PROBE_EVENTS select DYNAMIC_EVENTS help