Re: [v4,4/6] powerpc: kprobes: add support for KPROBES_ON_FTRACE

[PATCH v4 0/6] powerpc: add support for KPROBES_ON_FTRACE · Naveen N. Rao <hidden> · 2017-04-19
[PATCH v4 6/6] powerpc: kprobes: prefer ftrace when probing function entry · Naveen N. Rao <hidden> · 2017-04-19
Re: [v4,6/6] powerpc: kprobes: prefer ftrace when probing function entry · Michael Ellerman <hidden> · 2017-04-24
[PATCH v4 5/6] powerpc: introduce a new helper to obtain function entry points · Naveen N. Rao <hidden> · 2017-04-19
Re: [v4, 5/6] powerpc: introduce a new helper to obtain function entry points · Michael Ellerman <hidden> · 2017-04-24
[PATCH v4 4/6] powerpc: kprobes: add support for KPROBES_ON_FTRACE · Naveen N. Rao <hidden> · 2017-04-19
Re: [v4,4/6] powerpc: kprobes: add support for KPROBES_ON_FTRACE · Michael Ellerman <hidden> · 2017-04-24
[PATCH v4 3/6] kprobes: Skip preparing optprobe if the probe is ftrace-based · Naveen N. Rao <hidden> · 2017-04-19
Re: [v4, 3/6] kprobes: Skip preparing optprobe if the probe is ftrace-based · Michael Ellerman <hidden> · 2017-04-24
[PATCH v4 2/6] powerpc: ftrace: restore LR from pt_regs · Naveen N. Rao <hidden> · 2017-04-19
Re: [v4,2/6] powerpc: ftrace: restore LR from pt_regs · Michael Ellerman <hidden> · 2017-04-24
[PATCH v4 1/6] powerpc: ftrace: minor cleanup · Naveen N. Rao <hidden> · 2017-04-19
Re: [v4,1/6] powerpc: ftrace: minor cleanup · Michael Ellerman <hidden> · 2017-04-23

From: Michael Ellerman <hidden>
Date: 2017-04-24 22:48:21
Also in: lkml

On Wed, 2017-04-19 at 12:52:26 UTC, "Naveen N. Rao" wrote:

Allow kprobes to be placed on ftrace _mcount() call sites. This
optimization avoids the use of a trap, by riding on ftrace
infrastructure.

This depends on HAVE_DYNAMIC_FTRACE_WITH_REGS which depends on
MPROFILE_KERNEL, which is only currently enabled on powerpc64le with
newer toolchains.

Based on the x86 code by Masami.

Signed-off-by: Naveen N. Rao <redacted>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/ead514d5fb30a0889d51c0f0e35c3e

cheers

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