Received-SPF: pass (google.com: domain of linux-kernel+bounces-207574-linux.lists.archive=gmail.com@vger.kernel.org designates 139.178.88.99 as permitted sender) client-ip=139.178.88.99;
From: Tony Luck <tony.luck@intel.com>
To: Borislav Petkov <bp@alien8.de>
Cc: x86@kernel.org,
	Fenghua Yu <fenghua.yu@intel.com>,
	Reinette Chatre <reinette.chatre@intel.com>,
	Maciej Wieczor-Retman <maciej.wieczor-retman@intel.com>,
	Peter Newman <peternewman@google.com>,
	James Morse <james.morse@arm.com>,
	Babu Moger <babu.moger@amd.com>,
	Drew Fustini <dfustini@baylibre.com>,
	Dave Martin <Dave.Martin@arm.com>,
	linux-kernel@vger.kernel.org,
	patches@lists.linux.dev,
	Tony Luck <tony.luck@intel.com>
Subject: [PATCH v4 0/4] Add and use get_cpu_cacheinfo_level()
Date: Sun,  9 Jun 2024 17:39:23 -0700
Message-ID: <20240610003927.341707-1-tony.luck@intel.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

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@intel.com>

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

---
Changes since v3:
Link: https://lore.kernel.org/all/20240606164047.318378-1-tony.luck@intel.com/

Addition of lockdep_assert_cpus_held() in v3 led to #include hell
because <linux/cacheinfo.h> needed <linux/cpu.h>

Patch 1 resolves this hell by cut-and-pasting all the CPU hotplug
defintions out of cpu.h and into a new file cpuhplock.h.

Patch 2 brings the pasted code up to current coding standards

Patch 3 is the previous patch 1, but adds <linux/cpuhplock.h> instead
of <linux/cpu.h> to <linux/cacheinfo.h>

Patch 4 is the previous patch 2, unchanged.

Tony Luck (4):
  cpu: Move CPU hotplug function declarations into their own header
  cpu: Drop "extern" from function declarations in cpuhplock.h
  cacheinfo: Add function to get cacheinfo for a given (cpu, cachelevel)
  x86/resctrl: Replace open code cacheinfo searches

 include/linux/cacheinfo.h                 | 25 +++++++++---
 include/linux/cpu.h                       | 33 +---------------
 include/linux/cpuhplock.h                 | 47 +++++++++++++++++++++++
 arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 17 +++-----
 arch/x86/kernel/cpu/resctrl/rdtgroup.c    | 14 +++----
 5 files changed, 79 insertions(+), 57 deletions(-)
 create mode 100644 include/linux/cpuhplock.h


base-commit: 83a7eefedc9b56fe7bfeff13b6c7356688ffa670
-- 
2.45.0