Re: [linux-kernel] Re: [PATCH] x86: provide a DMI based port 0x80I/O delay override.
From: Christer Weinigel
Date: Wed Jan 09 2008 - 15:26:28 EST
On Wed, 09 Jan 2008 10:18:11 -0800
"H. Peter Anvin" <hpa@xxxxxxxxx> wrote:
> Zachary Amsden wrote:
> >
> > I'm speaking specifically in terms of 64-bit platforms here.
> > Shouldn't we unconditionally drop outb_p doing extra port I/O on
> > 64-bit architectures? Especially considering they don't even have
> > an ISA bus where the decode timing could even matter?
> >
>
> Why should the bitsize of the CPU matter for this? It seems one of
> the less meaningful keys for this.
Well, anything that runs x86_64 should be a fairly modern system.
> Second, as I have mentioned, I don't believe this is really the case,
> especially not for the PIT, which is still present -- the PIT
> *semantics* has explicit timing constraints.
>
> Third, you still have ISA devices, they're just called LPC or PC104
> devices these days.
Or PCMCIA. I'm still a happy user of a Zyxel ZyAIR 100B, it's one of
the most stable cards Wifi I've got running under Linux. :-)
/Christer
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