From: Dave Hansen <dave.hansen@intel.com>
To: Jon Kohler <jon@nutanix.com>, Sohil Mehta <sohil.mehta@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
"x86@kernel.org" <x86@kernel.org>, Borislav Petkov <bp@alien8.de>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>,
Josh Poimboeuf <jpoimboe@kernel.org>,
Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
Nikolay Borisov <nik.borisov@suse.com>,
Alex Murray <alex.murray@canonical.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: Old microcode CPU matching issue - x86/microcode/intel: Refresh the revisions that determine old_microcode
Date: Fri, 14 Nov 2025 12:34:34 -0800 [thread overview]
Message-ID: <85dd1e22-f629-4d2d-b572-30ca05ddab7a@intel.com> (raw)
In-Reply-To: <b2e6674e-eff7-4883-b1a2-9eb1e32c8247@intel.com>
On 10/22/25 10:53, Dave Hansen wrote:
> I think this is a platform mismatch problem. The microcode file for
> 06-8f-08 has two different versions for two different platforms:
>
> $ iucode-tool --list-all intel-ucode/06-8f-08
> ...
> sig 0x000806f8, pf_mask 0x10, 2025-04-08, rev 0x2c000401
> ...
> sig 0x000806f8, pf_mask 0x87, 2025-04-04, rev 0x2b000643
>
> Note the pf_mask and rev deltas here: ^^^^ ^^^^^^^^^^
>
> I guess we'll need to take those into consideration, both adding pf_mask to
> the match list and actually matching on it.
Jon,
Here is a completely untested series that might fix your issue:
https://git.kernel.org/pub/scm/linux/kernel/git/daveh/devel.git/log/?h=old-ucode-platform
It attempts to take IA32_PLATFORM_ID into account when considering
old microcode.
next prev parent reply other threads:[~2025-11-14 20:34 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-18 19:01 [PATCH 0/2] x86/intel: Refresh the old ucode revisions with a script Sohil Mehta
2025-08-18 19:01 ` [PATCH 1/2] x86/microcode/intel: Refresh the revisions that determine old_microcode Sohil Mehta
2025-08-19 5:19 ` Pawan Gupta
2025-08-19 11:18 ` Andrew Cooper
2025-08-19 16:13 ` Sohil Mehta
2025-08-19 18:31 ` Pawan Gupta
2025-08-19 18:28 ` Pawan Gupta
2025-08-19 19:07 ` Dave Hansen
2025-08-19 20:21 ` Andrew Cooper
2025-10-22 17:14 ` Old microcode CPU matching issue - " Jon Kohler
2025-10-22 17:53 ` Dave Hansen
2025-11-14 20:34 ` Dave Hansen [this message]
2025-11-20 16:35 ` Jon Kohler
2025-11-20 17:29 ` Sohil Mehta
2025-11-20 19:13 ` Sohil Mehta
2025-11-20 19:27 ` Dave Hansen
2025-11-21 0:39 ` Dave Hansen
2025-11-21 20:26 ` Sohil Mehta
2025-11-26 3:00 ` Jon Kohler
2025-08-18 19:01 ` [PATCH 2/2] scripts/x86: Add a script to update minimum Intel ucode revisions Sohil Mehta
2025-08-19 17:14 ` Dave Hansen
2025-08-19 20:41 ` Sohil Mehta
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