Subject: [J][PULL] Kernel livepatch support for for s390x
To: frank.heimes@canonical.com
Cc: frank.heimes@canonical.com

BugLink: https://bugs.launchpad.net/bugs/1639924

The 13 patches/commits of this pull request is the minimal patch set
to enable livepatch for s390x to the kernel.
The additional kernel option patch enables EXPOLINE_EXTERN,
that was introduced by:
13f43f2f6771 s390/nospec: build expoline.o for modules_prepare target.

---

The following changes since commit 941bdeb5ab2258758fce5f4d06296da98bfa7e82:

  UBUNTU: Ubuntu-5.15.0-48.54 (2022-08-26 11:12:42 +0200)

are available in the Git repository at:

  https://git.launchpad.net/~fheimes/+git/lp1639924/ bb1554a069b5bddf25d8cd640edb67ae8b53146b

for you to fetch changes up to bb1554a069b5bddf25d8cd640edb67ae8b53146b:

  UBUNTU: [Config] Set 'y' as default for CONFIG_EXPOLINE_EXTERN kernel config option (2022-09-07 13:28:09 +0000)

----------------------------------------------------------------
Frank Heimes (1):
      UBUNTU: [Config] Set 'y' as default for CONFIG_EXPOLINE_EXTERN kernel config option

Josh Poimboeuf (1):
      bug: Use normal relative pointers in 'struct bug_entry'

Peter Zijlstra (6):
      sched: Improve try_invoke_on_locked_down_task()
      sched,rcu: Rework try_invoke_on_locked_down_task()
      sched,livepatch: Use task_call_func()
      sched: Simplify wake_up_*idle*()
      sched,livepatch: Use wake_up_if_idle()
      sched: Improve wake_up_all_idle_cpus() take #2

Vasily Gorbik (6):
      s390/entry: remove unused expoline thunk
      s390: remove unused expoline to BC instructions
      s390/nospec: generate single register thunks if possible
      s390/nospec: add an option to use thunk-extern
      s390/nospec: align and size extern thunks
      s390/nospec: build expoline.o for modules_prepare target

 arch/arm64/include/asm/asm-bug.h          |  4 +-
 arch/powerpc/include/asm/bug.h            | 14 +++--
 arch/riscv/include/asm/bug.h              |  4 +-
 arch/s390/Kconfig                         | 15 +++++
 arch/s390/Makefile                        | 20 +++++--
 arch/s390/include/asm/bug.h               |  5 +-
 arch/s390/include/asm/nospec-insn.h       | 91 ++++++++++++-----------------
 arch/s390/kernel/entry.S                  |  1 -
 arch/s390/kernel/nospec-branch.c          | 25 ++------
 arch/s390/lib/Makefile                    |  2 +
 arch/s390/lib/expoline/Makefile           |  3 +
 arch/s390/lib/expoline/expoline.S         | 12 ++++
 arch/s390/tools/gcc-thunk-extern.sh       | 24 ++++++++
 arch/x86/include/asm/bug.h                |  2 +-
 debian.master/config/annotations          |  3 +
 debian.master/config/config.common.ubuntu |  1 +
 include/linux/sched/idle.h                |  4 ++
 include/linux/wait.h                      |  3 +-
 kernel/livepatch/transition.c             | 95 ++++++++++++++++---------------
 kernel/rcu/tasks.h                        | 12 ++--
 kernel/rcu/tree_stall.h                   |  8 +--
 kernel/sched/core.c                       | 83 +++++++++++++++------------
 kernel/smp.c                              | 12 ++--
 lib/bug.c                                 | 15 +++--
 scripts/mod/modpost.c                     |  5 ++
 25 files changed, 259 insertions(+), 204 deletions(-)
 create mode 100644 arch/s390/lib/expoline/Makefile
 create mode 100644 arch/s390/lib/expoline/expoline.S
 create mode 100755 arch/s390/tools/gcc-thunk-extern.sh