[lkml]   [2003]   [Aug]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Loading Pentium III microcode under Linux - catch 22!
Chris Rankin <> writes:

> I have an i840 motherboard with a pair of 933 MHz PIII
> Coppermine CPUs, and I use your microcode driver to
> load the latest Intel microcode into my CPUs. This is
> very important because these CPUs are buggy without
> their microcode, and I would prefer to have the BIOS
> load it except that this would prevent me from booting
> into memtest. I have tried this before - memtest
> crashes with an "Unexpected Interrupt" error after a
> few minutes. (No i840 workarounds enabled?) Since I
> suspect that DOS would do the same thing and I would
> boot into DOS to flash firmware, I have decided that
> crashes like this would be a Bad Thing.

If the microcode in the CPUs is buggy, they are faulty and you should
demand to get them replaced at no cost.

> In an ideal world, I would like Linux to load the
> microcode *before* the kernel boots, which begs the
> question of "How?". Can you suggest anything, please?
> I remember talk of boot-time RAM disks, and wondered
> if the microcode could be placed on one of these
> somehow? Or would that be ruled out immediately by the
> microcode's non-GPL nature?

I guess it would be possible to compile the microcode into the kernel
and have some code in arch/i386/* load it as early as possible. As
long as you don't distribute the compiled kernel you should be fine
wrt licensing.

Måns Rullgård

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:47    [W:0.564 / U:0.932 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site