linux-kernel - Re: [PATCH 04/11] x86: split CPU selection into 32-bit and 64-bit

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Message-Id: <9dc6213a-99c4-4267-a5b1-62181a3ecfea@app.fastmail.com>
Date: Wed, 04 Dec 2024 22:18:58 +0100
From: "Arnd Bergmann" <arnd@...db.de>
To: "Andy Shevchenko" <andy.shevchenko@...il.com>,
 "Arnd Bergmann" <arnd@...nel.org>
Cc: linux-kernel@...r.kernel.org, x86@...nel.org,
 "Thomas Gleixner" <tglx@...utronix.de>, "Ingo Molnar" <mingo@...hat.com>,
 "Borislav Petkov" <bp@...en8.de>,
 "Dave Hansen" <dave.hansen@...ux.intel.com>,
 "H. Peter Anvin" <hpa@...or.com>,
 "Linus Torvalds" <torvalds@...ux-foundation.org>,
 "Andy Shevchenko" <andy@...nel.org>, "Matthew Wilcox" <willy@...radead.org>,
 "Sean Christopherson" <seanjc@...gle.com>,
 "Davide Ciminaghi" <ciminaghi@...dd.com>,
 "Paolo Bonzini" <pbonzini@...hat.com>, kvm@...r.kernel.org
Subject: Re: [PATCH 04/11] x86: split CPU selection into 32-bit and 64-bit

On Wed, Dec 4, 2024, at 19:31, Andy Shevchenko wrote:
> On Wed, Dec 4, 2024 at 12:31 PM Arnd Bergmann <arnd@...nel.org> wrote:
>>
>> From: Arnd Bergmann <arnd@...db.de>
>>
>> The x86 CPU selection menu is confusing for a number of reasons.
>> One of them is how it's possible to build a 32-bit kernel for
>> a small number of early 64-bit microarchitectures (K8, Core2)
>
> Core 2

Fixed

>> +choice
>> +       prompt "x86-64 Processor family"
>> +       depends on X86_64
>> +       default GENERIC_CPU
>> +       help
>> +         This is the processor type of your CPU. This information is
>> +         used for optimizing purposes. In order to compile a kernel
>> +         that can run on all supported x86 CPU types (albeit not
>> +         optimally fast), you can specify "Generic-x86-64" here.
>> +
>> +         Here are the settings recommended for greatest speed:
>> +         - "Opteron/Athlon64/Hammer/K8" for all K8 and newer AMD CPUs.
>> +         - "Intel P4" for the Pentium 4/Netburst microarchitecture.
>> +         - "Core 2/newer Xeon" for all core2 and newer Intel CPUs.
>
> Core 2

Fixed, though this is the preexisting help text that I just
moved around.

      Arnd