From: Josh Poimboeuf <jpoimboe@redhat.com>
To: live-patching@vger.kernel.org
Cc: linux-kernel@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Jessica Yu <jeyu@kernel.org>
Subject: [PATCH 0/7] livepatch,module: Remove .klp.arch and module_disable_ro()
Date: Tue, 14 Apr 2020 11:28:36 -0500 [thread overview]
Message-ID: <cover.1586881704.git.jpoimboe@redhat.com> (raw)
Better late than never, these patches add simplifications and
improvements for some issues Peter found six months ago, as part of his
non-writable text code (W^X) cleanups.
Highlights:
- Remove the livepatch arch-specific .klp.arch sections, which were used
to do paravirt patching and alternatives patching for livepatch
replacement code.
- Add support for jump labels in patched code.
- Remove the last module_disable_ro() usage.
For more background, see this thread:
https://lkml.kernel.org/r/20191021135312.jbbxsuipxldocdjk@treble
I've tested this with a modified kpatch-build:
https://github.com/jpoimboe/kpatch/tree/no-klp-arch
(I'm planning to submit a github PR for kpatch-build, once I get
the updated unit/integration tests sorted out.
Josh Poimboeuf (4):
livepatch: Apply vmlinux-specific KLP relocations early
livepatch: Prevent module-specific KLP rela sections from referencing
vmlinux symbols
livepatch: Remove module_disable_ro() usage
module: Remove module_disable_ro()
Peter Zijlstra (3):
livepatch: Remove .klp.arch
s390/module: Use s390_kernel_write() for relocations
x86/module: Use text_poke() for relocations
Documentation/livepatch/module-elf-format.rst | 12 +-
arch/s390/kernel/module.c | 106 +++++++++------
arch/um/kernel/um_arch.c | 16 +++
arch/x86/kernel/Makefile | 1 -
arch/x86/kernel/livepatch.c | 53 --------
arch/x86/kernel/module.c | 34 ++++-
include/linux/livepatch.h | 19 ++-
include/linux/module.h | 2 -
kernel/livepatch/core.c | 128 +++++++++++-------
kernel/module.c | 22 +--
10 files changed, 205 insertions(+), 188 deletions(-)
delete mode 100644 arch/x86/kernel/livepatch.c
--
2.21.1
next reply other threads:[~2020-04-14 16:32 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-14 16:28 Josh Poimboeuf [this message]
2020-04-14 16:28 ` [PATCH 1/7] livepatch: Apply vmlinux-specific KLP relocations early Josh Poimboeuf
2020-04-14 17:44 ` Peter Zijlstra
2020-04-14 18:01 ` Josh Poimboeuf
2020-04-14 19:31 ` Josh Poimboeuf
2020-04-15 14:30 ` Miroslav Benes
2020-04-15 16:29 ` Josh Poimboeuf
2020-04-15 14:34 ` Miroslav Benes
2020-04-15 16:30 ` Josh Poimboeuf
2020-04-14 16:28 ` [PATCH 2/7] livepatch: Remove .klp.arch Josh Poimboeuf
2020-04-15 15:18 ` Jessica Yu
2020-04-14 16:28 ` [PATCH 3/7] livepatch: Prevent module-specific KLP rela sections from referencing vmlinux symbols Josh Poimboeuf
2020-04-14 16:28 ` [PATCH 4/7] s390/module: Use s390_kernel_write() for relocations Josh Poimboeuf
2020-04-16 8:56 ` Miroslav Benes
2020-04-16 12:06 ` Josh Poimboeuf
2020-04-16 13:16 ` Josh Poimboeuf
2020-04-17 1:37 ` Josh Poimboeuf
2020-04-14 16:28 ` [PATCH 5/7] x86/module: Use text_poke() " Josh Poimboeuf
2020-04-14 16:28 ` [PATCH 6/7] livepatch: Remove module_disable_ro() usage Josh Poimboeuf
2020-04-15 15:02 ` Jessica Yu
2020-04-15 16:33 ` Josh Poimboeuf
2020-04-16 9:28 ` Miroslav Benes
2020-04-16 12:10 ` Josh Poimboeuf
2020-04-14 16:28 ` [PATCH 7/7] module: Remove module_disable_ro() Josh Poimboeuf
2020-04-14 18:27 ` [PATCH 0/7] livepatch,module: Remove .klp.arch and module_disable_ro() Peter Zijlstra
2020-04-14 19:08 ` Josh Poimboeuf
2020-04-15 14:24 ` Peter Zijlstra
2020-04-15 16:17 ` Josh Poimboeuf
2020-04-16 15:31 ` Jessica Yu
2020-04-16 15:45 ` Josh Poimboeuf
2020-04-17 8:27 ` Miroslav Benes
2020-04-17 8:50 ` Jessica Yu
2020-04-16 9:45 ` Miroslav Benes
2020-04-16 12:20 ` Josh Poimboeuf
2020-04-17 9:08 ` Miroslav Benes
2020-04-15 0:57 ` Joe Lawrence
2020-04-15 1:31 ` Josh Poimboeuf
2020-04-15 1:37 ` Joe Lawrence
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