All of lore.kernel.org
 help / color / mirror / Atom feed
From: "Ahmed S. Darwish" <darwi@linutronix.de>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Borislav Petkov <bp@alien8.de>, Ingo Molnar <mingo@redhat.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	x86@kernel.org, John Ogness <john.ogness@linutronix.de>,
	x86-cpuid@lists.linux.dev, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v1 10/12] tools/x86/kcpuid: Update bitfields to x86-cpuid-db v2.0
Date: Fri, 7 Mar 2025 16:07:04 +0100	[thread overview]
Message-ID: <Z8sLmGf2L4mszUEp@lx-t490> (raw)
In-Reply-To: <C7684E03-36E0-4D58-B6F0-78F4DB82D737@zytor.com>

On Thu, 06 Mar 2025, H. Peter Anvin wrote:
>
> Leaf 3h was not unique to Transmeta.
>

Thanks, I missed that Pentium III can provide leaf 0x3 as well.

It seems that leaf 0x3's format differs between Intel and Transmeta.  On
Intel, PSN is at ECX:EDX, while on Transmeta, the PSN is at EAX:EBX, and
ECX:EDX on non-evaluation models provide the rest. [*]

Unfortunately, so far, x86-cpuid-db does not support having a CPUID
bitfield with different interpretations across vendors.

Given that Linux force disables PSN at early boot, I'll just remove that
leaf from the database — for now.  (Time wise, finishing the new
linux/arch/x86/ CPUID data model for mainline submission is a much higher
priority.)

All the best,
Ahmed

[*] "Processor Recognition", Transmeta Corporation, 2002/05/07.

  reply	other threads:[~2025-03-07 15:07 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-03-06 20:49 [PATCH v1 00/12] tools/x86/kcpuid: x86-cpuid-db v2.2 update Ahmed S. Darwish
2025-03-06 20:49 ` [PATCH v1 01/12] tools/x86/kcpuid: Fix error handling Ahmed S. Darwish
2025-03-06 20:49 ` [PATCH v1 02/12] tools/x86/kcpuid: Remove unused local variable Ahmed S. Darwish
2025-03-06 20:49 ` [PATCH v1 03/12] tools/x86/kcpuid: Remove unused global variable Ahmed S. Darwish
2025-03-06 20:49 ` [PATCH v1 04/12] tools/x86/kcpuid: Simplify usage() handling Ahmed S. Darwish
2025-03-06 20:49 ` [PATCH v1 05/12] tools/x86/kcpuid: Refactor CPUID range handling for future expansion Ahmed S. Darwish
2025-03-06 20:49 ` [PATCH v1 06/12] tools/x86/kcpuid: Extend CPUID index mask macro Ahmed S. Darwish
2025-03-06 20:49 ` [PATCH v1 07/12] tools/x86/kcpuid: Add rudimentary CPU vendor detection Ahmed S. Darwish
2025-03-06 21:07   ` Andrew Cooper
2025-03-07 14:06     ` Ahmed S. Darwish
2025-03-06 22:00   ` Dave Hansen
2025-03-07 13:48     ` Ahmed S. Darwish
2025-03-07 15:46       ` H. Peter Anvin
2025-03-07 15:03   ` Dave Hansen
2025-03-10 14:21     ` Ahmed S. Darwish
2025-03-06 20:49 ` [PATCH v1 08/12] tools/x86/kcpuid: Restrict CPUID scanning to valid vendor ranges Ahmed S. Darwish
2025-03-06 20:49 ` [PATCH v1 09/12] tools/x86/kcpuid: Define Transmeta and Centaur index ranges Ahmed S. Darwish
2025-03-06 20:49 ` [PATCH v1 10/12] tools/x86/kcpuid: Update bitfields to x86-cpuid-db v2.0 Ahmed S. Darwish
2025-03-07  3:18   ` H. Peter Anvin
2025-03-07 15:07     ` Ahmed S. Darwish [this message]
2025-03-07 15:27       ` H. Peter Anvin
2025-03-10 14:47         ` Ahmed S. Darwish
2025-03-06 20:49 ` [PATCH v1 11/12] tools/x86/kcpuid: Update bitfields to x86-cpuid-db v2.2 Ahmed S. Darwish
2025-03-06 20:50 ` [PATCH v1 12/12] MAINTAINERS: Include kcpuid under X86 CPUID DATABASE Ahmed S. Darwish

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=Z8sLmGf2L4mszUEp@lx-t490 \
    --to=darwi@linutronix.de \
    --cc=andrew.cooper3@citrix.com \
    --cc=bp@alien8.de \
    --cc=dave.hansen@linux.intel.com \
    --cc=hpa@zytor.com \
    --cc=john.ogness@linutronix.de \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@redhat.com \
    --cc=tglx@linutronix.de \
    --cc=x86-cpuid@lists.linux.dev \
    --cc=x86@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.