linux-kernel - [PATCH v3 0/3] openrisc: Add cacheinfo support and introduce new utility functions

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Message-ID: <20250323195544.152948-1-sahilcdq@proton.me>
Date: Mon, 24 Mar 2025 01:25:41 +0530
From: Sahil Siddiq <icegambit91@...il.com>
To: jonas@...thpole.se,
	stefan.kristiansson@...nalahti.fi,
	shorne@...il.com
Cc: sahilcdq@...ton.me,
	linux-openrisc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/3] openrisc: Add cacheinfo support and introduce new utility functions

Hi,

This patch series is substantially different from the previous two
versions. I have split the previous versions into 3 patches as follows:
1. Refactor struct cpuinfo_or1k.
2. Introduce new utility functions and check existence of cache
   components.
3. Add cacheinfo support.

The main purpose of this series is to expose CPU cache attributes for
OpenRISC in sysfs using the cacheinfo API. The core implementation
to achieve this is in patch #3. Patch #1 and #2 add certain enhancements
to simplify the implementation of cacheinfo support.

Patch #1 removes duplication of cache-related data members in struct
cpuinfo_or1k.

Patch #2 introduces several utility functions. One set of functions is
used to check if the cache components and SPRs exist before attempting
to use them. The other set provides a convenient interface to flush or
invalidate a range of cache blocks.

Thanks,
Sahil

Sahil Siddiq (3):
  openrisc: Refactor struct cpuinfo_or1k to reduce duplication
  openrisc: Introduce new utility functions to flush and invalidate
    caches
  openrisc: Add cacheinfo support

 arch/openrisc/include/asm/cacheflush.h |  17 ++++
 arch/openrisc/include/asm/cpuinfo.h    |  58 ++++++++++++--
 arch/openrisc/kernel/Makefile          |   2 +-
 arch/openrisc/kernel/cacheinfo.c       | 104 +++++++++++++++++++++++++
 arch/openrisc/kernel/dma.c             |  18 +----
 arch/openrisc/kernel/setup.c           |  39 ----------
 arch/openrisc/mm/cache.c               |  52 +++++++++++--
 arch/openrisc/mm/init.c                |   5 +-
 8 files changed, 224 insertions(+), 71 deletions(-)
 create mode 100644 arch/openrisc/kernel/cacheinfo.c

base-commit: ea1413e5b53a8dd4fa7675edb23cdf828bbdce1e
-- 
2.48.1