Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.

On Sat, 15 Dec 2007 14:27:25 +0100
Ingo Molnar <[email protected]> wrote:

> 
> * Rene Herman <[email protected]> wrote:
> 
> > The issue is -- how do you safely replace the outb pre-loops_per_jiffy 
> > calibration? I'm currently running with the attached hack (not 
> > submitted, only for 32-bit and discussion) the idea of which might be 
> > the best we can do?
> 
> how about doing a known-NOP chipset cycle? For example:
> 
>   inb(PIC_SLAVE_IMR)

It needs tobe a different chip to the main one (or macrocell anyway) - so
PIC for PIT and vice versa. However since we know 0x80 works for
everything on the planet but this one specifies of laptop which seems to
need a firmware update its a very high risk approach.

Alan
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

---

• Follow-Ups:
  • Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
    • From: "David P. Reed" <[email protected]>

• References:
  • [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
    • From: "David P. Reed" <[email protected]>
  • Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
    • From: Ingo Molnar <[email protected]>
  • Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
    • From: "H. Peter Anvin" <[email protected]>
  • Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
    • From: Ingo Molnar <[email protected]>
  • Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
    • From: Rene Herman <[email protected]>
  • Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
    • From: Ingo Molnar <[email protected]>

• Prev by Date: [PATCH 2.6.24-rc5] sym53c8xx_2 modpost section mismatch fix
• Next by Date: Re: kobject ->k_name memory leak
• Previous by thread: Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
• Next by thread: Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
• Index(es):
  • Date
  • Thread

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]