From: Sohil Mehta <sohil.mehta@intel.com>
To: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>,
Dave Hansen <dave.hansen@linux.intel.com>
Cc: <linux-kernel@vger.kernel.org>, <zhao1.liu@intel.com>,
Borislav Petkov <bp@alien8.de>, "H. Peter Anvin" <hpa@zytor.com>,
Ingo Molnar <mingo@redhat.com>, Jon Kohler <jon@nutanix.com>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
Thomas Gleixner <tglx@kernel.org>,
Tony Luck <tony.luck@intel.com>, <x86@kernel.org>
Subject: Re: [PATCH v4 1/4] x86/microcode: Refactor platform ID enumeration into a helper
Date: Wed, 4 Mar 2026 22:28:13 -0800 [thread overview]
Message-ID: <fecd1240-7c11-477f-bb00-657f950ddcad@intel.com> (raw)
In-Reply-To: <20260305013853.3riphxey733tokly@desk>
On 3/4/2026 5:38 PM, Pawan Gupta wrote:
> On Wed, Mar 04, 2026 at 10:10:18AM -0800, Dave Hansen wrote:
>> Also note that the PII is weird. It does not really have a platform
>> ID because it doesn't even have the MSR. Just consider it to be
>> platform ID 0. Instead of saying >=PII, say <=PII. The PII is the
> ^
> I think you meant PIII here?
>
What Dave has here is correct. You can blame me for the confusion.
Family 6, model 5 is DESCHUTES but Pentium II and not III.
I incorrectly named it INTEL_PENTIUM_III_DESCHUTES in commit
7e6b0a2e4152 ("x86/microcode: Update the Intel processor flag scan
check"). It should have been named INTEL_PENTIUM_II_DESCHUTES.
Anyway, there are no other users of this. So after this series merges
I'll send a cleanup patch deleting the #define completely.
>> real oddball here being the only CPU with Linux microcode updates
>> but no platform ID. It's worth calling it out by name.
>>
next prev parent reply other threads:[~2026-03-05 6:28 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-04 18:10 [PATCH v4 0/4] x86/cpu: Take Intel platform into account for old microcode checks Dave Hansen
2026-03-04 18:10 ` [PATCH v4 1/4] x86/microcode: Refactor platform ID enumeration into a helper Dave Hansen
2026-03-05 1:38 ` Pawan Gupta
2026-03-05 6:28 ` Sohil Mehta [this message]
2026-03-05 18:01 ` Pawan Gupta
2026-03-05 18:37 ` Dave Hansen
2026-03-05 13:16 ` Borislav Petkov
2026-03-05 19:07 ` [tip: x86/microcode] " tip-bot2 for Dave Hansen
2026-03-05 20:28 ` tip-bot2 for Dave Hansen
2026-03-04 18:10 ` [PATCH v4 2/4] x86/cpu: Add platform ID to CPU info structure Dave Hansen
2026-03-05 2:26 ` Pawan Gupta
2026-03-05 18:39 ` Dave Hansen
2026-03-05 19:07 ` [tip: x86/microcode] " tip-bot2 for Dave Hansen
2026-03-05 20:28 ` tip-bot2 for Dave Hansen
[not found] ` <20260306004923.ln6ai2zl23gjsdov@desk>
2026-03-06 0:56 ` [PATCH v4 2/4] " Pawan Gupta
2026-03-04 18:10 ` [PATCH v4 3/4] x86/cpu: Add platform ID to CPU matching structure Dave Hansen
2026-03-05 19:07 ` [tip: x86/microcode] " tip-bot2 for Dave Hansen
2026-03-05 20:28 ` tip-bot2 for Dave Hansen
2026-03-04 18:10 ` [PATCH v4 4/4] x86/microcode: Add platform mask to Intel microcode "old" list Dave Hansen
2026-03-05 19:07 ` [tip: x86/microcode] " tip-bot2 for Dave Hansen
2026-03-05 20:28 ` tip-bot2 for Dave Hansen
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