linux-kernel - Re: [PATCH 04/11] rust: io: add PortIo

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

Message-Id: <03548041-89f9-41a2-8488-5b234ce11138@app.fastmail.com>
Date: Fri, 09 May 2025 08:05:06 +0200
From: "Arnd Bergmann" <arnd@...db.de>
To: "Andrew Ballance" <andrewjballance@...il.com>,
 "Danilo Krummrich" <dakr@...nel.org>, "Dave Airlie" <airlied@...il.com>,
 "Simona Vetter" <simona@...ll.ch>,
 "Andrew Morton" <akpm@...ux-foundation.org>,
 "Miguel Ojeda" <ojeda@...nel.org>, "Alex Gaynor" <alex.gaynor@...il.com>,
 "Boqun Feng" <boqun.feng@...il.com>, "Gary Guo" <gary@...yguo.net>,
 Björn Roy Baron <bjorn3_gh@...tonmail.com>,
 "Benno Lossin" <benno.lossin@...ton.me>,
 "Andreas Hindborg" <a.hindborg@...nel.org>,
 "Alice Ryhl" <aliceryhl@...gle.com>, "Trevor Gross" <tmgross@...ch.edu>,
 "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>,
 "Rafael J . Wysocki" <rafael@...nel.org>, bhelgaas@...gle.com,
 Krzysztof Wilczyński <kwilczynski@...nel.org>,
 "Raag Jadav" <raag.jadav@...el.com>,
 "Andy Shevchenko" <andriy.shevchenko@...ux.intel.com>, me@...enk.dev,
 "FUJITA Tomonori" <fujita.tomonori@...il.com>, daniel.almeida@...labora.com
Cc: "nouveau@...ts.freedesktop.org" <nouveau@...ts.freedesktop.org>,
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 rust-for-linux@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: [PATCH 04/11] rust: io: add PortIo

On Fri, May 9, 2025, at 05:15, Andrew Ballance wrote:
> +
> +#define define_rust_pio_read_helper(name, type)     \
> +	type rust_helper_##name(unsigned long port) \
> +	{                                           \
> +		return name(port);                  \
> +	}
> +
> +#define define_rust_pio_write_helper(name, type)                \
> +	void rust_helper_##name(type value, unsigned long port) \
> +	{                                                       \
> +		name(value, port);                              \
> +	}
> +
> +define_rust_pio_read_helper(inb, u8);
> +define_rust_pio_read_helper(inw, u16);
> +define_rust_pio_read_helper(inl, u32);
> +
> +define_rust_pio_write_helper(outb, u8);
> +define_rust_pio_write_helper(outw, u16);
> +define_rust_pio_write_helper(outl, u32);

These have to be guarded with "#ifdef CONFIG_HAS_PIO", since
most modern machines no longer support PIO at all, even behind
PCI.

The option is still enabled by default for a number of
architectures that normally don't have PIO, but it should
eventually become optional on pretty much anything but
x86 and a few 1990s-era workstations that implement x86-style
on-board devices.

     Arnd