linux-kernel - Re: [PATCH v2] RAS/AMD/ATL: Remove bitwise_xor

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <20251124133442.GEaSRe8jPj_7WBXAw_@fat_crate.local>
Date: Mon, 24 Nov 2025 14:34:42 +0100
From: Borislav Petkov <bp@...en8.de>
To: Nikolay Borisov <nik.borisov@...e.com>
Cc: Kuan-Wei Chiu <visitorckw@...il.com>, linux-edac@...r.kernel.org,
	linux-kernel@...r.kernel.org, Yazen.Ghannam@....com
Subject: Re: [PATCH v2] RAS/AMD/ATL: Remove bitwise_xor_bits

On Mon, Nov 24, 2025 at 03:24:40PM +0200, Nikolay Borisov wrote:
> So yeah, much better IMHO, unless there is some hidden latency in the popcnt...

Yap, exactly. And every CPU we care about supports POPCNT. And this is soo not
perf-sensitive so let's whack that function.

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette