From: Torsten Duwe <duwe@lst.de>
To: Steven Rostedt <rostedt@goodmis.org>,
Michael Ellerman <mpe@ellerman.id.au>
Cc: Jiri Kosina <jkosina@suse.cz>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
live-patching@vger.kernel.org
Subject: [PATCH v3 0/8] ftrace with regs + live patching for ppc64 LE (ABI v2)
Date: Mon, 26 Oct 2015 18:49:30 +0100 [thread overview]
Message-ID: <20151026174930.GA29592@lst.de> (raw)
Hi all,
here is the current status of ftrace with regs, trace ops and live patching
for ppc64le. It seems I broke the ftrace graph caller and I spent most of
last week trying to fix it; Steven, maybe you could have a look? I startet
out with -mprofile-kernel and now found that the ordinary -pg is very
different. -mprofile-kernel only does the very bare minimal prologue
(set TOC, save LR) and then calls _mcount, which poses some problems.
I managed to get them resolved up to the point of the graph return ...
I tested intensively with the ftrace self tests, and, without the graph
caller, this set passes all of them on ppc64le. I tried not to break BE,
but may have missed an ifdef or two.
patch 2 (ftrace_modify_all_code default) is an independent prerequisite,
I would even call it a fix -- please consider applying it even if you
don't like the rest.
patch 5 has proven to be very useful during development; as mentioned earlier,
many of these functions may get called during a recoverable fault. The whole
recursion will probably terminate if all goes well, but I'd rather be
defensive here.
Torsten Duwe (8):
ppc64le FTRACE_WITH_REGS implementation
ppc use ftrace_modify_all_code default
ppc64 ftrace_with_regs configuration variables
ppc64 ftrace_with_regs: spare early boot and low level
ppc64 ftrace: disable profiling for some functions
ppc64 ftrace: disable profiling for some files
Implement kernel live patching for ppc64le (ABIv2)
Enable LIVEPATCH to be configured on ppc64le and add livepatch.o if it
is selected.
arch/powerpc/Kconfig | 7 ++
arch/powerpc/Makefile | 7 ++
arch/powerpc/include/asm/ftrace.h | 5 ++
arch/powerpc/include/asm/livepatch.h | 27 +++++++
arch/powerpc/kernel/Makefile | 13 +--
arch/powerpc/kernel/entry_64.S | 153 ++++++++++++++++++++++++++++++++++-
arch/powerpc/kernel/ftrace.c | 88 +++++++++++++++-----
arch/powerpc/kernel/livepatch.c | 20 +++++
arch/powerpc/kernel/module_64.c | 39 ++++++++-
arch/powerpc/kernel/process.c | 2 +-
arch/powerpc/lib/Makefile | 4 +-
arch/powerpc/mm/fault.c | 2 +-
arch/powerpc/mm/hash_utils_64.c | 18 ++---
arch/powerpc/mm/hugetlbpage-hash64.c | 2 +-
arch/powerpc/mm/hugetlbpage.c | 4 +-
arch/powerpc/mm/mem.c | 2 +-
arch/powerpc/mm/pgtable_64.c | 2 +-
arch/powerpc/mm/slb.c | 6 +-
arch/powerpc/mm/slice.c | 8 +-
kernel/trace/Kconfig | 5 ++
20 files changed, 359 insertions(+), 55 deletions(-)
create mode 100644 arch/powerpc/include/asm/livepatch.h
create mode 100644 arch/powerpc/kernel/livepatch.c
--
1.8.5.6
next reply other threads:[~2015-10-26 17:49 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-26 17:49 Torsten Duwe [this message]
2015-10-26 17:56 ` [PATCH v3 2/8] ppc use ftrace_modify_all_code default Torsten Duwe
2015-10-26 17:57 ` [PATCH v3 0/8] ftrace with regs + live patching for ppc64 LE (ABI v2) Torsten Duwe
2015-10-27 6:20 ` kbuild test robot
2015-10-26 17:58 ` [PATCH v3 4/8] ppc64 ftrace_with_regs: spare early boot and low level Torsten Duwe
2015-10-26 17:59 ` [PATCH v3 5/8] ppc64 ftrace: disable profiling for some functions Torsten Duwe
2015-10-26 18:01 ` [PATCH v3 6/8] ppc64 ftrace: disable profiling for some files Torsten Duwe
2015-10-26 18:02 ` [PATCH v3 7/8] Implement kernel live patching for ppc64le (ABIv2) Torsten Duwe
2015-10-26 18:02 ` [PATCH v3 8/8] Enable LIVEPATCH to be configured on ppc64le and add livepatch.o if it is selected Torsten Duwe
2015-10-26 18:03 ` [PATCH v3 3/8] ppc64 ftrace_with_regs configuration variables Torsten Duwe
2015-10-26 18:04 ` [PATCH v3 1/8] ppc64le FTRACE_WITH_REGS implementation Torsten Duwe
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