linux-kernel - [PATCH v2 0/3] Add and use get_cpu_cacheinfo

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Date: Wed,  5 Jun 2024 09:14:24 -0700
From: Tony Luck <tony.luck@...el.com>
To: Borislav Petkov <bp@...en8.de>
Cc: x86@...nel.org,
	Fenghua Yu <fenghua.yu@...el.com>,
	Reinette Chatre <reinette.chatre@...el.com>,
	Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>,
	Peter Newman <peternewman@...gle.com>,
	James Morse <james.morse@....com>,
	Babu Moger <babu.moger@....com>,
	Drew Fustini <dfustini@...libre.com>,
	Dave Martin <Dave.Martin@....com>,
	linux-kernel@...r.kernel.org,
	patches@...ts.linux.dev,
	Tony Luck <tony.luck@...el.com>
Subject: [PATCH v2 0/3] Add and use get_cpu_cacheinfo_level()

This helper function came up in discussion of the resctrl patches
for Sub-NUMA Cluster (SNC) support. Reinette pointed out[1] that there
are already two places where it would clean things up by avoiding
open coding. The SNC patches will add two additional call sites.

So rather than have this jammed up as part of the SNC series, I'm
posting it as a simple standalone cleanup.

Signed-off-by: Tony Luck <tony.luck@...el.com>

[1] https://lore.kernel.org/all/050c64b3-20b3-4db6-b782-f5124ebaab31@intel.com/

---
Changes since v1:

1: s/for cache/for the cache/ in comment for get_cpu_cacheinfo_level()
2: No change
3: Fixed broken firtree declaration order in rdtgroup_cbm_to_size()

Added Reinette's "Reviewed-by:" tag to all three.

Tony Luck (3):
  cacheinfo: Add function to get cacheinfo for a given (cpu, cachelevel)
  x86/resctrl: Replace open code cacheinfo search in
    pseudo_lock_region_init()
  x86/resctrl: Replace open code cacheinfo search in
    rdtgroup_cbm_to_size()

 include/linux/cacheinfo.h                 | 22 +++++++++++++++++-----
 arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 17 ++++++-----------
 arch/x86/kernel/cpu/resctrl/rdtgroup.c    | 14 +++++---------
 3 files changed, 28 insertions(+), 25 deletions(-)


base-commit: c3f38fa61af77b49866b006939479069cd451173
-- 
2.45.0