From: Heiko Carstens <hca@linux.ibm.com>
To: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org, Sven Schnelle <svens@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
linux-s390@vger.kernel.org
Subject: Re: [PATCH 0/2] s390/ftrace: implement hotpatching
Date: Sat, 31 Jul 2021 08:47:55 +0200 [thread overview]
Message-ID: <YQTyG6HwvJILMaU6@osiris> (raw)
In-Reply-To: <20210728212546.128248-1-iii@linux.ibm.com>
On Wed, Jul 28, 2021 at 11:25:44PM +0200, Ilya Leoshkevich wrote:
> Hello,
>
> This series implements the stop_machine()-less ftrace code patching
> for s390. It's trickier than that of e.g. Intel, because the only
> on-the-fly code patching allowed by s390 is changing a mask of a
> conditional branch instruction. Patch 1 contains a new common code hook
> that we need for that, patch 2 contains the actual implementation as
> well as explanation of all the small details.
>
> We would like to take this series through the s390 tree, and we need a
> review on the patch 1 for that. Could you please take a look?
>
> Best regards,
> Ilya
>
> Ilya Leoshkevich (2):
> ftrace: Introduce ftrace_need_init_nop()
> s390/ftrace: implement hotpatching
>
> arch/s390/include/asm/ftrace.h | 46 +------
> arch/s390/include/asm/ftrace.lds.h | 21 +++
> arch/s390/include/asm/module.h | 8 ++
> arch/s390/kernel/ftrace.c | 207 ++++++++++++++++++++++++++---
> arch/s390/kernel/ftrace.h | 24 ++++
> arch/s390/kernel/module.c | 45 +++++++
> arch/s390/kernel/vmlinux.lds.S | 2 +
> include/linux/ftrace.h | 16 +++
> kernel/trace/ftrace.c | 4 +-
> 9 files changed, 314 insertions(+), 59 deletions(-)
> create mode 100644 arch/s390/include/asm/ftrace.lds.h
> create mode 100644 arch/s390/kernel/ftrace.h
Series applied, thank you!
prev parent reply other threads:[~2021-07-31 6:48 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-28 21:25 [PATCH 0/2] s390/ftrace: implement hotpatching Ilya Leoshkevich
2021-07-28 21:25 ` [PATCH 1/2] ftrace: Introduce ftrace_need_init_nop() Ilya Leoshkevich
2021-07-31 2:07 ` Steven Rostedt
2021-07-31 6:47 ` Heiko Carstens
2021-07-28 21:25 ` [PATCH 2/2] s390/ftrace: implement hotpatching Ilya Leoshkevich
2021-07-31 6:47 ` Heiko Carstens [this message]
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