linux-kernel - Re: [PATCH] x86: add more x86-64 micro-architecture levels

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Message-ID: <JDkDAyklisK_zhy8Ecsw8Z6t4ALDO1Jzzza2DZjWefD5erI-tTPGD6GhevyIp1Ee1xoWg1ouqkMCOqcylaqwZg2YBO7h9USi0qzCIRotUBo=@proton.me>
Date: Wed, 18 Sep 2024 19:02:28 +0000
From: John <therealgraysky@...ton.me>
To: Hanabishi <i.r.e.c.c.a.k.u.n+kernel.org@...il.com>
Cc: Borislav Petkov <bp@...en8.de>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Dave Hansen <dave.hansen@...ux.intel.com>, Unknown <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [PATCH] x86: add more x86-64 micro-architecture levels

On Tuesday, September 17th, 2024 at 2:45 PM, H. Peter Anvin <hpa@...or.com> wrote:

> On September 17, 2024 8:22:38 PM GMT+02:00, John 
> Also, these are not uarch levels, they are ISA levels...

Thank you for pointing that out.  I see now the differences between ISA levels and uarches.

> Besides, there are already well-known patches exist for years. So why reinventing the wheel here?
> 
> E.g. graysky patch used by ZEN kernel:
> https://github.com/zen-kernel/zen-kernel/commit/6f32b8af8ccdb56ef2856db3631eea55b79378c6
> It contains way more architectures, includig ISA levels.

Yes, that is my git repo.  I created the subset (just -march=x86-64-v[2,3,4]) patch specifically to post on lkml thinking that the larger patch with all of the uarches would be too complex.