On Mon, 17 Aug 2026 20:10:58 +0800 Jinchao Wang <[email protected]> wrote:
> On 8/7/2026 11:34 PM, Masami Hiramatsu (Google) wrote: > > 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]> > > --- > > 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 > > > Reviewed-by: Jinchao Wang <[email protected]> Thank you for your review! I'll update this series. Thanks, -- Masami Hiramatsu (Google) <[email protected]>
