Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override. | KernelTrap

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override.

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From: Rene Herman <rene.herman@...>

To: Christer Weinigel <christer@...>

Cc: Ingo Molnar <mingo@...>, Alan Cox <alan@...>, David P. Reed <dpreed@...>, H. Peter Anvin <hpa@...>, Rene Herman <rene.herman@...>, Paul Rolland <rol@...>, Pavel Machek <pavel@...>, Thomas Gleixner <tglx@...>, <linux-kernel@...>, Ingo Molnar <mingo@...>, <rol@...>

Subject: Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override.

Date: Tuesday, January 1, 2008 - 5:42 pm

On 01-01-08 22:42, Christer Weinigel wrote:

quoted text> The data sheet for the Intel M8259A says:
> 
>     End of /RD to Next Command: 300 ns
>     End of /WR to Next Command: 370 ns
> 
> On the other hand, I don't know how all the i8253/i8259 clones or the
> numerous variants of Super I/O chips behave.  It wouldn't surprise me
> if some Super I/O chip uses the ISA bus clock to latch the values
> internally so that the delay is dependent on the bus frequency instead.

I wouldn't even be surprised if most all would...

Rene.
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Messages in current thread:

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., David P. Reed, (Tue Jan 1, 11:59 am)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Pavel Machek, (Tue Jan 1, 1:31 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., David P. Reed, (Tue Jan 1, 1:33 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Tue Jan 1, 12:15 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Tue Jan 1, 5:15 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Tue Jan 1, 5:35 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Tue Jan 1, 5:44 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Maciej W. Rozycki, (Wed Jan 9, 1:27 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Wed Jan 9, 2:18 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Tue Jan 1, 6:35 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Tue Jan 1, 6:39 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Tue Jan 1, 7:11 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 8:55 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Tue Jan 1, 10:27 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Tue Jan 1, 9:00 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Tue Jan 1, 8:25 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., David P. Reed, (Tue Jan 1, 1:32 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Tue Jan 1, 1:38 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Ingo Molnar, (Tue Jan 1, 12:43 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Tue Jan 1, 1:32 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Ingo Molnar, (Tue Jan 1, 2:45 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Tue Jan 1, 5:07 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Ingo Molnar, (Wed Jan 2, 6:04 am)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Wed Jan 2, 9:47 am)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Wed Jan 2, 11:35 am)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Wed Jan 2, 11:50 am)

Re: [linux-kernel] Re: [PATCH] x86: provide a DMI based port..., David P. Reed, (Wed Jan 2, 9:11 am)

Re: [linux-kernel] Re: [PATCH] x86: provide a DMI based port..., Ingo Molnar, (Wed Jan 2, 9:21 am)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 4:14 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Tue Jan 1, 5:13 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 1:32 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Ingo Molnar, (Tue Jan 1, 2:46 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 3:35 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Tue Jan 1, 5:21 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Ingo Molnar, (Wed Jan 2, 6:00 am)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 7:05 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Tue Jan 1, 7:12 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 8:23 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Ingo Molnar, (Tue Jan 1, 5:01 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 5:42 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Tue Jan 1, 5:50 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Tue Jan 1, 5:42 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Alan Cox, (Tue Jan 1, 5:26 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Rene Herman, (Tue Jan 1, 3:59 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., Christer Weinigel, (Tue Jan 1, 4:55 pm)

Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay ove..., H. Peter Anvin, (Tue Jan 1, 5:24 pm)

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