Re: [Xen-devel] [Pkg-xen-devel] Bug#785187: xen-hypervisor-4.5-amd64: Option ucode=scan is not working

[Stephan Seitz <stse+debianbugs@xxxxxxxxxxxxxxxxxxx>]

On Fri, May 15, 2015 at 08:26:42AM +0100, Ian Campbell wrote:
> Here's an idea. First extract the real initrd from the back half of the
> initrd:
>        ijc@dagon:tmp$ cat /boot/initrd.img | ( cpio -t >&2 ; cat ) > initrd.real
>        kernel
>        kernel/x86
>        kernel/x86/microcode
>        kernel/x86/microcode/GenuineIntel.bin
>        16 blocks
>        ijc@dagon:tmp$ file initrd.real
>        initrd.real: gzip compressed data, last modified: Sun Apr 19 16:31:17 
> 2015, from Unix
>        ijc@dagon:tmp$ zcat initrd.real | cpio -t | head -n 5
>        .
>        etc
>        etc/ld.so.conf.d
>        etc/ld.so.conf.d/fakeroot-x86_64-linux-gnu.conf
>        etc/ld.so.conf.d/x86_64-linux-gnu.conf
>
> Now you can experiment with regenerating the ucode bit with whatever
> commands are recommended and reconcatenating the two. If that works then
> we know there is some incompatibility between iucode-tools's output and
> Xen's cpio reader (could be a bug in either or both I think).
All right. Can you please provide some commands how to create and 
reconcatenate the two initrds? I donât have any experience with cpio.
Shade and sweet water!

        Stephan

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| Stephan Seitz          E-Mail: stse@xxxxxxxxxxxxxxxxxxx |
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