linux-kernel - Re: [PATCH 1/2] x86/microcode: Add microcode= cmdline parsing

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Message-ID: <2952979d-3275-4a33-aadb-c946e1ce0100@intel.com>
Date: Tue, 12 Aug 2025 12:14:51 -0700
From: Sohil Mehta <sohil.mehta@...el.com>
To: Borislav Petkov <bp@...en8.de>
CC: Borislav Petkov <bp@...nel.org>, X86 ML <x86@...nel.org>, LKML
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] x86/microcode: Add microcode= cmdline parsing

On 8/12/2025 3:23 AM, Borislav Petkov wrote:
>> @@ -1211,7 +1211,7 @@
>>
>> -       dis_ucode_ldr   [X86] Disable the microcode loader.
>> +       dis_ucode_ldr   [X86] Same as microcode=disable_loader.
>>
>>
>> @@ -3770,6 +3770,9 @@
>>
>> +                       disable_loader
>> +                               Disable the microcode loader.
> 
> Because adding a new alias of a cmdline parameter doesn't belong in the same
> patch.
> 

But, this patch introduces code to support microcode=dis_ucode_ldr which
would then become ABI.

> And if anything, that thing should be
> 
> 	microcode=off
> 

Sure, a separate patch directly adding support for microcode=off works
as well.