[arch-releng] Changes for early microcode

[Christian Hesse]

Gerardo Exequiel Pozzi <vmlinuz386 at gmail.com> on Wed, 2014/10/29 11:28:
> On 10/29/2014 09:57 AM, Christian Hesse wrote:
> > Gerardo Exequiel Pozzi <vmlinuz386 at gmail.com> on Wed, 2014/10/29 09:41:
> >> On 10/29/2014 09:35 AM, Gerardo Exequiel Pozzi wrote:
> >>> On 10/29/2014 08:31 AM, Christian Hesse wrote:
> >>>> Hello everybody,
> >>>>
> >>>> the official ISO file includes intel-ucode, which requires changes to
> >>>> the bootloader for early microcode. Will we see changes before November
> >>>> release?
> >>>>
> >>>
> >>> I see al least two options:
> >>>
> >>> (1) Write two syslinux/gummiboot entries per each current entry,
> >>> something like "start archlinux for Intel machine (except virtualized
> >>> enviroment)", "start archlinux for non-Intel machine".
> >>>
> >>> (2) Always load intel-ucode.img for all enviroments, should be ignored
> >>> in cases where does not care.
> >>
> >> In case (2), for keep it simple, we can unpack then intel-ucode.img and
> >> just always add the .bin inside archiso.img
> >>
> >> I guess, should work. Please confirm, I do not have Intel CPU.
> > 
> > That does not work. Not sure why the microcode is ignored, but I could not
> > updated this way.
> 
> Should work. Are you sure that you are doing the right thing?
> 
> This file must exist on initramfs: /kernel/x86/microcode/GenuineIntel.bin

Yap.

> > What works is concatenating the initramfs images. Something like
> > 
> > # cat intel-ucode.img initramfs-linux.img > archiso.img
> > 
> > works perfectly. This is the method described upstream [0].
> > 
> > [0] https://www.kernel.org/doc/Documentation/x86/early-microcode.txt
> > 
> 
> Or generate a initcpio hook with:
> 
> add_file /path/to/GenuineIntel.bin /kernel/x86/microcode/GenuineIntel.bin

I tried exactly this. Did not work for.

Please prove me wrong! I would prefer it that way. ;)
 
> Concat archive the same effect, weird if this does not works...

Don't know...
-- 
main(a){char*c=/*    Schoene Gruesse                         */"B?IJj;MEH"
"CX:;",b;for(a/*    Chris           get my mail address:    */=0;b=c[a++];)
putchar(b-1/(/*               gcc -o sig sig.c && ./sig    */b/42*2-3)*42);}
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