[PATCH v1 00/31] x86/resctrl: Move the resctrl filesystem code to /fs/resctrl

[James Morse]

Hello!

This is the final series that allows other architectures to implement resctrl.
The last patch just moves the code, and its a bit of a monster. I don't expect
that to get merged as part of this series - we should wait for it to make
less impact on other series. It's included here to show what gets moved, and
that structures/function-prototypes have the right visibility.

Otherwise this series renames functions and moves code around. With the
exception of invalid configurations for the configurable-events, there should
be no changes in behaviour caused by this series.

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])

This series is based on Linus' commit 23956900041d and can be retrieved from:
https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git
mpam/move_to_fs/v1

Sorry for the mid-merge window base, I'm away for a few weeks - this should
rebase trivially onto rc1.

As ever - bugs welcome,
Thanks,

James

[1] https://lore.kernel.org/lkml/20201030161120.227225-1-james.morse@xxxxxxx/

James Morse (31):
  x86/resctrl: Fix allocation of cleanest CLOSID on platforms with no
    monitors
  x86/resctrl: Add a helper to avoid reaching into the arch code
    resource list
  x86/resctrl: Move ctrlval string parsing policy away from the arch
    code
  x86/resctrl: Add helper for setting CPU default properties
  x86/resctrl: Remove rdtgroup from update_cpu_closid_rmid()
  x86/resctrl: Export resctrl fs's init function
  x86/resctrl: Wrap resctrl_arch_find_domain() around rdt_find_domain()
  x86/resctrl: Move resctrl types to a separate header
  x86/resctrl: Add a resctrl helper to reset all the resources
  x86/resctrl: Move monitor init work to a resctrl init call
  x86/resctrl: Move monitor exit work to a restrl exit call
  x86/resctrl: Move max_{name,data}_width into resctrl code
  x86/resctrl: Stop using the for_each_*_rdt_resource() walkers
  x86/resctrl: Export the is_mbm_*_enabled() helpers to asm/resctrl.h
  x86/resctrl: Add resctrl_arch_is_evt_configurable() to abstract BMEC
  x86/resctrl: Change mon_event_config_{read,write}() to be arch helpers
  x86/resctrl: Move mbm_cfg_mask to struct rdt_resource
  x86/resctrl: Allow resctrl_arch_mon_event_config_write() to return an
    error
  x86/resctrl: Add resctrl_arch_ prefix to pseudo lock functions
  x86/resctrl: Allow an architecture to disable pseudo lock
  x86/resctrl: Make prefetch_disable_bits belong to the arch code
  x86/resctrl: Make resctrl_arch_pseudo_lock_fn() take a plr
  x86/resctrl: Move thread_throttle_mode_init() to be managed by resctrl
  x86/resctrl: Move get_config_index() to a header
  x86/resctrl: Claim get_domain_from_cpu() for resctrl
  x86/resctrl: Describe resctrl's bitmap size assumptions
  x86/resctrl: Rename resctrl_sched_in() to begin resctrl_arch_
  x86/resctrl: Drop __init/__exit on assorted symbols
  fs/resctrl: Add boiler plate for external resctrl code
  x86/resctrl: Move the filesystem bits to headers visible to fs/resctrl
  x86/resctrl: Move the resctrl filesystem code to /fs/resctrl

 MAINTAINERS                               |    2 +
 arch/Kconfig                              |    8 +
 arch/x86/Kconfig                          |    5 +-
 arch/x86/include/asm/resctrl.h            |   45 +-
 arch/x86/kernel/cpu/resctrl/Makefile      |    5 +-
 arch/x86/kernel/cpu/resctrl/core.c        |  119 +-
 arch/x86/kernel/cpu/resctrl/ctrlmondata.c |  506 +--
 arch/x86/kernel/cpu/resctrl/internal.h    |  433 +--
 arch/x86/kernel/cpu/resctrl/monitor.c     |  813 +----
 arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 1126 +-----
 arch/x86/kernel/cpu/resctrl/rdtgroup.c    | 3929 +-------------------
 arch/x86/kernel/process_32.c              |    2 +-
 arch/x86/kernel/process_64.c              |    2 +-
 fs/Kconfig                                |    1 +
 fs/Makefile                               |    1 +
 fs/resctrl/Kconfig                        |   23 +
 fs/resctrl/Makefile                       |    3 +
 fs/resctrl/ctrlmondata.c                  |  527 +++
 fs/resctrl/internal.h                     |  340 ++
 fs/resctrl/monitor.c                      |  843 +++++
 fs/resctrl/psuedo_lock.c                  | 1122 ++++++
 fs/resctrl/rdtgroup.c                     | 4013 +++++++++++++++++++++
 include/linux/resctrl.h                   |  153 +-
 include/linux/resctrl_types.h             |   98 +
 24 files changed, 7244 insertions(+), 6875 deletions(-)
 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/psuedo_lock.c
 create mode 100644 fs/resctrl/rdtgroup.c
 create mode 100644 include/linux/resctrl_types.h

-- 
2.39.2