linux-kernel - Re: [PATCH v1 01/14] x86/realmode: remove I/O port paravirtualization

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: <20260128170104.GPaXpA0LK8C3KQN9wj@fat_crate.local>
Date: Wed, 28 Jan 2026 18:01:04 +0100
From: Borislav Petkov <bp@...en8.de>
To: "H. Peter Anvin" <hpa@...or.com>
Cc: Thomas Gleixner <tglx@...nel.org>, Ingo Molnar <mingo@...hat.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Uros Bizjak <ubizjak@...il.com>, Petr Mladek <pmladek@...e.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Kees Cook <kees@...nel.org>,
	"Peter Zijlstra (Intel)" <peterz@...radead.org>,
	Nathan Chancellor <nathan@...nel.org>,
	Kiryl Shutsemau <kas@...nel.org>,
	Rick Edgecombe <rick.p.edgecombe@...el.com>,
	linux-kernel@...r.kernel.org, linux-coco@...ts.linux.dev,
	x86@...nel.org
Subject: Re: [PATCH v1 01/14] x86/realmode: remove I/O port paravirtualization

On Tue, Jan 20, 2026 at 11:53:53AM -0800, H. Peter Anvin wrote:
> In commit:
> 
> eb4ea1ae8f45 x86/boot: Port I/O: Allow to hook up alternative helpers

We do this format for referencing commits:

  eb4ea1ae8f45 ("x86/boot: Port I/O: Allow to hook up alternative helpers")

> ... paravirtualization hooks were added to (some!) of the port I/O
> functions. However, they were only ever used in the 32/64-bit
> "compressed" directory, and never made any sense in the real-mode
> code, which is notoriously size sensitive.
> 
> Without these hooks, <asm/shared/io.h> is usable directly, so mode

s/mode/move/

Otherwise, LGTM.

-- 
Regards/Gruss,
    Boris.

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