linux-kernel - [PATCH 0/5] x86/cpu: Remove duplicate microcode version matching infrastructure

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Message-Id: <20241206193829.89E12D0B@davehans-spike.ostc.intel.com>
Date: Fri, 06 Dec 2024 11:38:29 -0800
From: Dave Hansen <dave.hansen@...ux.intel.com>
To: linux-kernel@...r.kernel.org
Cc: x86@...nel.org,tglx@...utronix.de,bp@...en8.de,kan.liang@...ux.intel.com,mingo@...nel.org,peterz@...radead.org,tony.luck@...el.com,pawan.kumar.gupta@...ux.intel.com,Dave Hansen <dave.hansen@...ux.intel.com>
Subject: [PATCH 0/5] x86/cpu: Remove duplicate microcode version matching infrastructure

Changes from RFC:
 * Convert stepping match helpers to always take a range and never
   take a raw stepping bitmap. - Ingo

--

x86 has generic CPU matching infrastructure. This lets you build
tables of CPUs with some property.  It's mostly used for enumerating
model-specific features, but it is quite a bit more flexible than
that. In includes a facility to match steppings and microcode
versions. This generic infrastructure is built around 'struct
x86_cpu_id'.

There is a less generic, parallel CPU matching facility built around
'struct x86_cpu_desc'. It is used only for matching specific microcode
revisions.  All of the 'struct x86_cpu_desc' users can be converted to
'struct x86_cpu_id'.

Do that conversion then remove the 'struct x86_cpu_desc'
infrastructure.

Testing or acks would be much appreciated!

--

 arch/x86/events/intel/core.c         |   63 +++++++++++--------------
 arch/x86/include/asm/cpu_device_id.h |   51 +++-----------------
 arch/x86/kernel/apic/apic.c          |   18 +++----
 arch/x86/kernel/cpu/amd.c            |    9 +--
 arch/x86/kernel/cpu/common.c         |   78 ++++++++++++++++----------------
 arch/x86/kernel/cpu/match.c          |   28 +----------
 drivers/edac/i10nm_base.c            |   20 ++++----
 drivers/edac/skx_base.c              |    2
 include/linux/mod_devicetable.h      |    2
 9 files changed, 105 insertions(+), 166 deletions(-)