From: Balbir Singh <bsingharora@gmail.com>
To: Torsten Duwe <duwe@lst.de>, Michael Ellerman <mpe@ellerman.id.au>
Cc: Petr Mladek <pmladek@suse.com>, Jessica Yu <jeyu@redhat.com>,
Jiri Kosina <jkosina@suse.cz>,
linux-kernel@vger.kernel.org,
Steven Rostedt <rostedt@goodmis.org>,
live-patching@vger.kernel.org, Miroslav Benes <mbenes@suse.cz>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH v8 0/8] ftrace with regs + live patching for ppc64 LE (ABI v2)
Date: Thu, 11 Feb 2016 17:18:23 +1100 [thread overview]
Message-ID: <1455171503.2885.6.camel@gmail.com> (raw)
In-Reply-To: <20160210174221.EBBEC692C8@newverein.lst.de>
On Wed, 2016-02-10 at 18:29 +0100, Torsten Duwe wrote:
> Changes since V7:
> * drop "notrace" attribute for MMU-aiding functions
> and their callees.
> * merge "-mprofile-kernel"-stripping patches into one.
>
> Changes since v6:
> * include Petr's patch, on popular demand ;)
> * move #ifdefs out of functions for readability;
> introduce static helper functions instead.
> * No more literal binary instructions in hex,
> at least not added by this patch set.
> * add compile time checker to detect the presence
> of known-good -mprofile-kernel support.
> * limit Kconfig / compile to the configurations really supported:
> + (static) FTRACE with -pg
> + DYNAMIC_FTRACE with -pg with or without -mprofile-kernel
> (depending on the compiler)
> + DYNAMIC_FTRACE_WITH_REGS only with -mprofile-kernel
> (will error out if the compiler is broken)
>
> Changes since v5:
> * extra "std r0,LRSAVE(r1)" for gcc-6
> This makes the code compiler-agnostic.
> * Follow Petr Mladek's suggestion to avoid
> redefinition of HAVE_LIVEPATCH
>
> Changes since v4:
> * change comment style in entry_64.S to C89
> (nobody is using assembler syntax comments there).
> * the bool function restore_r2 shouldn't return 2,
> that's a little confusing.
> * Test whether the compiler supports -mprofile-kernel
> and only then define CC_USING_MPROFILE_KERNEL
> * also make the return value of klp_check_compiler_support
> depend on that.
>
> Major changes since v3:
> * the graph tracer works now.
> It turned out the stack frame it tried to manipulate does not
> exist at that point.
> * changes only needed in order to support -mprofile-kernel are now
> in a separate patch, prepended.
> * Kconfig cleanup so this is only selectable on ppc64le.
>
> Petr Mladek (1):
> livepatch: Detect offset for the ftrace location during build
>
> Torsten Duwe (7):
> ppc64 (le): prepare for -mprofile-kernel
> ppc64le FTRACE_WITH_REGS implementation
> ppc use ftrace_modify_all_code default
> ppc64 ftrace_with_regs configuration variables
> ppc64 ftrace_with_regs: 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 | 6 +
> arch/powerpc/Makefile | 17 +++
> arch/powerpc/gcc-mprofile-kernel-notrace.sh | 33 ++++++
> arch/powerpc/include/asm/code-patching.h | 24 ++++
> arch/powerpc/include/asm/ftrace.h | 5 +
> arch/powerpc/include/asm/livepatch.h | 45 ++++++++
> arch/powerpc/kernel/Makefile | 13 ++-
> arch/powerpc/kernel/entry_64.S | 169
> +++++++++++++++++++++++++++-
> arch/powerpc/kernel/ftrace.c | 129 ++++++++++++++++-----
> arch/powerpc/kernel/livepatch.c | 38 +++++++
> arch/powerpc/kernel/module_64.c | 56 ++++++++-
> arch/powerpc/lib/Makefile | 4 +-
> arch/s390/Kconfig | 1 +
> kernel/livepatch/Makefile | 13 +++
> kernel/livepatch/core.c | 12 +-
> kernel/livepatch/ftrace-test.c | 6 +
> kernel/trace/Kconfig | 5 +
> scripts/recordmcount.c | 6 +-
> scripts/recordmcount.h | 17 ++-
> 19 files changed, 552 insertions(+), 47 deletions(-)
> create mode 100755 arch/powerpc/gcc-mprofile-kernel-notrace.sh
> create mode 100644 arch/powerpc/include/asm/livepatch.h
> create mode 100644 arch/powerpc/kernel/livepatch.c
> create mode 100644 kernel/livepatch/ftrace-test.c
>
Quick question - I presume these apply on top of 4.5.0-rc2?
Balbir Singh.
next prev parent reply other threads:[~2016-02-11 6:18 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-10 17:29 [PATCH v8 0/8] ftrace with regs + live patching for ppc64 LE (ABI v2) Torsten Duwe
2016-01-28 15:32 ` [PATCH v8 8/8] livepatch: Detect offset for the ftrace location during build Torsten Duwe
2016-02-12 16:13 ` Balbir Singh
2016-02-12 16:45 ` Petr Mladek
2016-02-13 1:33 ` Balbir Singh
2016-02-16 5:47 ` Kamalesh Babulal
2016-02-16 8:23 ` Torsten Duwe
2016-02-16 10:30 ` Kamalesh Babulal
2016-02-16 10:39 ` Torsten Duwe
2016-02-16 13:57 ` Petr Mladek
2016-02-17 3:08 ` Michael Ellerman
2016-02-23 17:00 ` Torsten Duwe
2016-02-24 6:37 ` Balbir Singh
2016-02-24 6:55 ` Balbir Singh
2016-02-24 9:23 ` Torsten Duwe
2016-02-24 11:22 ` Balbir Singh
2016-02-24 7:51 ` Kamalesh Babulal
2016-02-10 16:21 ` [PATCH v8 1/8] ppc64 (le): prepare for -mprofile-kernel Torsten Duwe
2016-02-17 10:55 ` Michael Ellerman
2016-02-17 11:30 ` Torsten Duwe
2016-02-17 11:39 ` Michael Ellerman
2016-02-10 16:22 ` [PATCH v8 2/8] ppc64le FTRACE_WITH_REGS implementation Torsten Duwe
2016-02-10 16:22 ` [PATCH v8 3/8] ppc use ftrace_modify_all_code default Torsten Duwe
2016-02-10 16:25 ` [PATCH v8 4/8] ppc64 ftrace_with_regs configuration variables Torsten Duwe
2016-02-11 7:48 ` Balbir Singh
2016-02-11 8:39 ` Kamalesh Babulal
2016-02-11 9:35 ` Balbir Singh
2016-02-11 13:00 ` Murali Sampath
2016-02-11 13:00 ` Murali Sampath
2016-02-11 8:42 ` Torsten Duwe
2016-02-11 9:34 ` Balbir Singh
2016-02-15 10:27 ` Michael Ellerman
2016-02-15 12:56 ` Jiri Kosina
2016-02-15 14:04 ` Torsten Duwe
2016-02-15 22:21 ` Torsten Duwe
2016-02-16 4:53 ` Balbir Singh
2016-02-16 10:09 ` Michael Ellerman
2016-02-16 10:35 ` Torsten Duwe
2016-02-10 16:27 ` [PATCH v8 5/8] ppc64 ftrace_with_regs: disable profiling for some files Torsten Duwe
2016-02-10 16:34 ` [PATCH v8 6/8] Implement kernel live patching for ppc64le (ABIv2) Torsten Duwe
2016-02-11 9:01 ` Miroslav Benes
2016-02-10 16:36 ` [PATCH v8 7/8] Enable LIVEPATCH to be configured on ppc64le and add livepatch.o if it is selected Torsten Duwe
2016-02-11 6:18 ` Balbir Singh [this message]
2016-02-11 8:38 ` [PATCH v8 0/8] ftrace with regs + live patching for ppc64 LE (ABI v2) Torsten Duwe
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