[PATCH v10 00/30] x86/resctrl: Move the resctrl filesystem code to /fs/resctrl

[James Morse <james.morse@arm.com>]

Changes since v8:
 * Rebased onto the cpumask optimisations.
 * Assorted commit message and comment clarifications.

Changes otherwise noted on each patch.

---

Patches 24-29 should be squashed together when merged, taking the commit message
of patch 25. It probably makes sense to drop the tags at that point as patch 25 is
generated by a script, and impossible to review. They are posted like this to allow
folk to re-generate patch 25, then review the differences on top. Not squashing them
together would expose a ftrace build warning during bisect. (but who does that!)

The result  should look like this:
git://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/move_to_fs/v10_final

I can also post the 'final' version to be picked up if that is less work.


This series is based on rc5, and can be retrieved from:
git://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/move_to_fs/v10

With the exception of invalid configurations for the configurable-events, there
should be no changes in behaviour caused by this series. It is now possible for
throttle_mode to report 'undefined', but no known platform will do this.
resctrl_exit() is now something that can be called, but x86 doesn't do this.

The driving pattern is to make things like struct rdtgroup private to resctrl.
Features like pseudo-lock aren't going to work on arm64, the ability to disable
it at compile time is added.

After this, I can start posting the MPAM driver to make use of resctrl on arm64.
(What's MPAM? See the cover letter of the first series. [1])

As ever - bugs welcome,
Thanks,

James

[v9] https://lore.kernel.org/all/20250425173809.5529-1-james.morse@arm.com
[v8] https://lore.kernel.org/all/20250411164229.23413-1-james.morse@arm.com
[v7] https://lore.kernel.org/all/20250228195913.24895-1-james.morse@arm.com/
[v6] https://lore.kernel.org/lkml/20250207181823.6378-1-james.morse@arm.com/
[v5] https://lore.kernel.org/r/20241004180347.19985-1-james.morse@arm.com
[v4] https://lore.kernel.org/all/20240802172853.22529-1-james.morse@arm.com/
[v3] https://lore.kernel.org/r/20240614150033.10454-1-james.morse@arm.com
[v2] https://lore.kernel.org/r/20240426150537.8094-1-Dave.Martin@arm.com
[v1] https://lore.kernel.org/r/20240321165106.31602-1-james.morse@arm.com
[1] https://lore.kernel.org/lkml/20201030161120.227225-1-james.morse@arm.com/


Amit Singh Tomar (1):
  x86/resctrl: Remove the limit on the number of CLOSID

Dave Martin (3):
  x86/resctrl: Squelch whitespace anomalies in resctrl core code
  x86/resctrl: Prefer alloc(sizeof(*foo)) idiom in rdt_init_fs_context()
  x86/resctrl: Relax some asm #includes

James Morse (22):
  x86/resctrl: Rename resctrl_sched_in() to begin with "resctrl_arch_"
  x86/resctrl: Check all domains are offline in resctrl_exit()
  x86/resctrl: resctrl_exit() teardown resctrl but leave the mount point
  x86/resctrl: Drop __init/__exit on assorted symbols
  x86/resctrl: Move is_mba_sc() out of core.c
  x86/resctrl: Add end-marker to the resctrl_event_id enum
  x86/resctrl: Expand the width of domid by replacing mon_data_bits
  x86/resctrl: Split trace.h
  x86/resctrl: Add 'resctrl' to the title of the resctrl documentation
  fs/resctrl: Add boiler plate for external resctrl code
  x86/resctrl: Move the filesystem bits to headers visible to fs/resctrl
  x86/resctrl: Move enum resctrl_event_id to resctrl.h
  x86/resctrl: Fix types in resctrl_arch_mon_ctx_{alloc,free}() stubs
  x86/resctrl: Move pseudo lock prototypes to include/linux/resctrl.h
  x86/resctrl: Always initialise rid field in rdt_resources_all[]
  x86/resctrl: Remove a newline to avoid confusing the code move script
  x86,fs/resctrl: Move the resctrl filesystem code to live in
    /fs/resctrl
  x86,fs/resctrl: Remove duplicated trace header files
  fs/resctrl: Remove unnecessary includes
  fs/resctrl: Change internal.h's header guard macros
  x86,fs/resctrl: Move resctrl.rst to live under
    Documentation/filesystems
  MAINTAINERS: Add reviewers for fs/resctrl

Yury Norov [NVIDIA] (4):
  cpumask: relax cpumask_any_but()
  find: add find_first_andnot_bit()
  cpumask: add cpumask_{first,next}_andnot() API
  x86/resctrl: Optimize cpumask_any_housekeeping()

 Documentation/arch/x86/index.rst              |    1 -
 Documentation/filesystems/index.rst           |    1 +
 .../{arch/x86 => filesystems}/resctrl.rst     |    6 +-
 MAINTAINERS                                   |    5 +-
 arch/Kconfig                                  |    8 +
 arch/x86/Kconfig                              |   11 +-
 arch/x86/include/asm/resctrl.h                |   19 +-
 arch/x86/kernel/cpu/resctrl/Makefile          |    2 +
 arch/x86/kernel/cpu/resctrl/core.c            |   31 +-
 arch/x86/kernel/cpu/resctrl/ctrlmondata.c     |  635 ---
 arch/x86/kernel/cpu/resctrl/internal.h        |  399 +-
 arch/x86/kernel/cpu/resctrl/monitor.c         |  918 +---
 arch/x86/kernel/cpu/resctrl/pseudo_lock.c     | 1092 +----
 .../resctrl/{trace.h => pseudo_lock_trace.h}  |   26 +-
 arch/x86/kernel/cpu/resctrl/rdtgroup.c        | 4164 +---------------
 arch/x86/kernel/process_32.c                  |    2 +-
 arch/x86/kernel/process_64.c                  |    2 +-
 fs/Kconfig                                    |    1 +
 fs/Makefile                                   |    1 +
 fs/resctrl/Kconfig                            |   39 +
 fs/resctrl/Makefile                           |    6 +
 fs/resctrl/ctrlmondata.c                      |  661 +++
 fs/resctrl/internal.h                         |  426 ++
 fs/resctrl/monitor.c                          |  929 ++++
 fs/resctrl/monitor_trace.h                    |   33 +
 fs/resctrl/pseudo_lock.c                      | 1105 +++++
 fs/resctrl/rdtgroup.c                         | 4344 +++++++++++++++++
 include/linux/cpumask.h                       |   75 +-
 include/linux/find.h                          |   25 +
 include/linux/resctrl.h                       |   36 +-
 include/linux/resctrl_types.h                 |   16 +-
 lib/find_bit.c                                |   11 +
 32 files changed, 7763 insertions(+), 7267 deletions(-)
 rename Documentation/{arch/x86 => filesystems}/resctrl.rst (99%)
 rename arch/x86/kernel/cpu/resctrl/{trace.h => pseudo_lock_trace.h} (56%)
 create mode 100644 fs/resctrl/Kconfig
 create mode 100644 fs/resctrl/Makefile
 create mode 100644 fs/resctrl/ctrlmondata.c
 create mode 100644 fs/resctrl/internal.h
 create mode 100644 fs/resctrl/monitor.c
 create mode 100644 fs/resctrl/monitor_trace.h
 create mode 100644 fs/resctrl/pseudo_lock.c
 create mode 100644 fs/resctrl/rdtgroup.c

-- 
2.39.5