linux-kernel - Re: [PATCH] drivers/char/mem.c: Add /dev/ioports, supporting 16-bit and 32-bit ports

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Message-ID: <538FA4C7.2050206@zytor.com>
Date:	Wed, 04 Jun 2014 15:59:19 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Maciej W. Rozycki" <macro@...ux-mips.org>,
	Josh Triplett <josh@...htriplett.org>
CC:	Jann Horn <jann@...jh.net>, Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linux-api@...r.kernel.org
Subject: Re: [PATCH] drivers/char/mem.c: Add /dev/ioports, supporting 16-bit
 and 32-bit ports

On 06/01/2014 03:35 AM, Maciej W. Rozycki wrote:
> Also IIRC PCI-PCI bridges only forward port I/O space accesses 
> within the low 64kB.

Not true.

	-hpa

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