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Message-Id: <20250228195913.24895-1-james.morse@arm.com>
Date: Fri, 28 Feb 2025 19:58:24 +0000
From: James Morse <james.morse@....com>
To: x86@...nel.org,
linux-kernel@...r.kernel.org
Cc: Reinette Chatre <reinette.chatre@...el.com>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
Borislav Petkov <bp@...en8.de>,
H Peter Anvin <hpa@...or.com>,
Babu Moger <Babu.Moger@....com>,
James Morse <james.morse@....com>,
shameerali.kolothum.thodi@...wei.com,
D Scott Phillips OS <scott@...amperecomputing.com>,
carl@...amperecomputing.com,
lcherian@...vell.com,
bobo.shaobowang@...wei.com,
tan.shaopeng@...itsu.com,
baolin.wang@...ux.alibaba.com,
Jamie Iles <quic_jiles@...cinc.com>,
Xin Hao <xhao@...ux.alibaba.com>,
peternewman@...gle.com,
dfustini@...libre.com,
amitsinght@...vell.com,
David Hildenbrand <david@...hat.com>,
Rex Nie <rex.nie@...uarmicro.com>,
Dave Martin <dave.martin@....com>,
Koba Ko <kobak@...dia.com>,
Shanker Donthineni <sdonthineni@...dia.com>,
fenghuay@...dia.com
Subject: [PATCH v7 00/49] x86/resctrl: Move the resctrl filesystem code to /fs/resctrl
Changes since v6?:
* All the excitement is in patch 37, turns out there are two rmdir() paths
that don't join up.
The last eight patches are new:
* The python script has been replaced with the patch that it generates, see
the bare branch below if you want to regenerate it.
* There have been comments on the followup to the generated patch, those are
included here - I suggest they be squashed into the generated patch.
* This version includes some checkpatch linting from Dave.
---
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. It is now possible for
throttle_mode to report 'undefined', but no known platform will 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])
This series is based on v6.14-rc3 and can be retrieved from:
https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/move_to_fs/v7
or for those who want to regnerate the patch that moves all the code:
https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git mpam/move_to_fs/v7_bare
As ever - bugs welcome,
Thanks,
James
[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 (45):
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: Remove fflags from struct rdt_resource
x86/resctrl: Use schema type to determine how to parse schema values
x86/resctrl: Use schema type to determine the schema format string
x86/resctrl: Remove data_width and the tabular format
x86/resctrl: Add max_bw to struct resctrl_membw
x86/resctrl: Generate default_ctrl instead of sharing it
x86/resctrl: Add helper for setting CPU default properties
x86/resctrl: Remove rdtgroup from update_cpu_closid_rmid()
x86/resctrl: Expose resctrl fs's init function to the rest of the
kernel
x86/resctrl: Move rdt_find_domain() to be visible to arch and fs code
x86/resctrl: Move resctrl types to a separate header
x86/resctrl: Add an arch helper to reset one resource
x86/resctrl: Move monitor exit work to a resctrl exit call
x86/resctrl: Move monitor init work to a resctrl init call
x86/resctrl: Rewrite and move the for_each_*_rdt_resource() walkers
x86/resctrl: Move 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 mba_mbps_default_event init to filesystem code
x86/resctrl: Move mbm_cfg_mask to struct rdt_resource
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 RFTYPE flags to be managed by resctrl
x86/resctrl: Handle throttle_mode for SMBA resources
x86/resctrl: Move get_config_index() to a header
x86/resctrl: Move get_{mon,ctrl}_domain_from_cpu() to live with their
callers
x86/resctrl: Rename resctrl_sched_in() to begin with "resctrl_arch_"
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 dom_id by replacing mon_data_bits
x86/resctrl: Remove a newline to avoid confusing the code move script
x86/resctrl: Split trace.h
fs/resctrl: Add boiler plate for external resctrl code
x86/resctrl: Move the filesystem bits to headers visible to fs/resctrl
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
Documentation/arch/x86/index.rst | 1 -
Documentation/filesystems/index.rst | 1 +
.../{arch/x86 => filesystems}/resctrl.rst | 0
MAINTAINERS | 4 +-
arch/Kconfig | 8 +
arch/x86/Kconfig | 6 +-
arch/x86/include/asm/resctrl.h | 43 +-
arch/x86/kernel/cpu/resctrl/Makefile | 8 +-
arch/x86/kernel/cpu/resctrl/core.c | 214 +-
arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 606 +--
arch/x86/kernel/cpu/resctrl/internal.h | 504 +-
arch/x86/kernel/cpu/resctrl/monitor.c | 863 +---
arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 1120 +----
.../resctrl/{trace.h => pseudo_lock_trace.h} | 26 +-
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 4031 +--------------
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 | 660 +++
fs/resctrl/internal.h | 435 ++
fs/resctrl/monitor.c | 933 ++++
fs/resctrl/monitor_trace.h | 33 +
fs/resctrl/pseudo_lock.c | 1104 +++++
fs/resctrl/rdtgroup.c | 4329 +++++++++++++++++
include/linux/resctrl.h | 216 +-
include/linux/resctrl_types.h | 59 +
29 files changed, 7992 insertions(+), 7263 deletions(-)
rename Documentation/{arch/x86 => filesystems}/resctrl.rst (100%)
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
create mode 100644 include/linux/resctrl_types.h
--
2.39.5
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