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

James Morse
2024-03-21T16:51:18Z

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@arm.com/

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

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2.39.2