linux-kernel - [PATCH v1 00/12] tools/x86/kcpuid: x86-cpuid-db v2.2 update

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Message-ID: <20250306205000.227399-1-darwi@linutronix.de>
Date: Thu,  6 Mar 2025 21:49:48 +0100
From: "Ahmed S. Darwish" <darwi@...utronix.de>
To: Borislav Petkov <bp@...en8.de>,
	Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Thomas Gleixner <tglx@...utronix.de>,
	Andrew Cooper <andrew.cooper3@...rix.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	x86@...nel.org,
	John Ogness <john.ogness@...utronix.de>,
	x86-cpuid@...ts.linux.dev,
	LKML <linux-kernel@...r.kernel.org>,
	"Ahmed S. Darwish" <darwi@...utronix.de>
Subject: [PATCH v1 00/12] tools/x86/kcpuid: x86-cpuid-db v2.2 update

Hi,

This series updates kcpuid's CSV file from v1.0 to v2.2, as generated by
the x86-cpuid-db project. [*]

The CSV changes include:

* New leaves for Transmeta and Centaur/Zhaoxin.
* New bitfields at leaves 0x7, 0x80000001, 0x80000020, and 0x80000021.
* A standardized style for all x86 trademarks, registers, opcodes, byte
  units, hexadecimal digits, and x86 technical terms.

More details about the CSV changes are at the actual commit logs.

PQ Summary:

* Patch 1 is a generic kcpuid bugfix.

* Patches 2-4 are preparatory cleanups.

* Patches 5-9 add rudimentary x86 vendor detection and filtering to
  kcpuid, as the CSV file is updated with indices that are exclusive to
  certain CPU vendors.

* Patch 10 updates the CSV file to x86-cpuid-db v2.0.

* Patch 11 updates the CSV file to x86-cpuid-db v2.2.

  Patch 10 and 11 are separate on purpose, to make the CSV commit log
  diffs more sensible.

* Patch 12 puts the whole kcpuid tool under MAINTAINERS' X86 CPUID entry,
  since changes to the CSV file may require updates to the kcpuid code.
  I would also like to have myself and the x86-cpuid mailing list CCed
  for all future kcpuid patches.

Thanks!

[*] https://gitlab.com/x86-cpuid.org/x86-cpuid-db
    https://x86-cpuid.org

8<-----

Ahmed S. Darwish (12):
  tools/x86/kcpuid: Fix error handling
  tools/x86/kcpuid: Remove unused local variable
  tools/x86/kcpuid: Remove unused global variable
  tools/x86/kcpuid: Simplify usage() handling
  tools/x86/kcpuid: Refactor CPUID range handling for future expansion
  tools/x86/kcpuid: Extend CPUID index mask macro
  tools/x86/kcpuid: Add rudimentary CPU vendor detection
  tools/x86/kcpuid: Restrict CPUID scanning to valid vendor ranges
  tools/x86/kcpuid: Define Transmeta and Centaur index ranges
  tools/x86/kcpuid: Update bitfields to x86-cpuid-db v2.0
  tools/x86/kcpuid: Update bitfields to x86-cpuid-db v2.2
  MAINTAINERS: Include kcpuid under X86 CPUID DATABASE

 MAINTAINERS                     |   2 +-
 tools/arch/x86/kcpuid/cpuid.csv | 787 +++++++++++++++++++-------------
 tools/arch/x86/kcpuid/kcpuid.c  | 257 +++++++----
 3 files changed, 621 insertions(+), 425 deletions(-)

base-commit: 7eb172143d5508b4da468ed59ee857c6e5e01da6
--
2.48.1