linux-kernel - [PATCH v2 0/3] objtool: noinstr validation for static branches/calls

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Message-ID: <cover.1732682344.git.jpoimboe@kernel.org>
Date: Tue, 26 Nov 2024 20:47:39 -0800
From: Josh Poimboeuf <jpoimboe@...nel.org>
To: Valentin Schneider <vschneid@...hat.com>
Cc: linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH v2 0/3] objtool: noinstr validation for static branches/calls

v2:
- Add some fixes reported by kbuild.


FWIW, this reports the following static keys:

  - sched_clock_running
  - __sched_clock_stable
  - mds_idle_clear
  - vmx_l1d_flush_cond
  - stack_erasing_bypass

and the following static calls:

  - pv_sched_clock
  - x86_idle

(not necessarily an exhaustive list, just the ones I've seen)


Josh Poimboeuf (3):
  jump_label: Add annotations for validating noinstr usage
  static_call: Add read-only-after-init static calls
  objtool: Add noinstr validation for static branches/calls

 include/linux/jump_label.h              | 30 ++++++--
 include/linux/objtool.h                 |  7 ++
 include/linux/static_call.h             | 19 +++++
 tools/objtool/Documentation/objtool.txt | 34 +++++++++
 tools/objtool/check.c                   | 92 ++++++++++++++++++++++---
 tools/objtool/include/objtool/check.h   |  1 +
 tools/objtool/include/objtool/elf.h     |  1 +
 tools/objtool/include/objtool/special.h |  1 +
 tools/objtool/special.c                 | 18 ++++-
 9 files changed, 187 insertions(+), 16 deletions(-)

-- 
2.47.0