Re: [PATCH 8/8] arm64: Enable livepatch for ARM64

Steven Rostedt
2025-02-03T15:15:45Z

On Fri, 31 Jan 2025 21:38:46 +0530
Prasanna Kumar T S M <ptsm@linux.microsoft.com> wrote:

> > --- a/arch/arm64/Kconfig
> > +++ b/arch/arm64/Kconfig
> > @@ -271,6 +271,8 @@ config ARM64
> > select HAVE_SOFTIRQ_ON_OWN_STACK
> > select USER_STACKTRACE_SUPPORT
> > select VDSO_GETRANDOM
> > + select HAVE_RELIABLE_STACKTRACE if SFRAME_UNWINDER
> > + select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_ARGS && HAVE_RELIABLE_STACKTRACE
> > help
> > ARM 64-bit (AArch64) Linux support.
> >
> > @@ -2498,3 +2500,4 @@ source "drivers/acpi/Kconfig"
> >
> > source "arch/arm64/kvm/Kconfig"
> >
> > +source "kernel/livepatch/Kconfig"
>
> Will this work for ftrace'd (kprobe'd) function as well?

What work? The stack walker? It may require updates to the tracing
trampolines, but it should be doable just like ORC is.

-- Steve