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 Tue, May 19, 2015 at 12:47:51PM +0100, Ian Campbell wrote:
> The reconcatenate bit is easy, just:
>   $ cat initrd.ucode initrd.real > initrd.img
> With initrd.real extracted above.
>
> initrd.ucode creation I'm a little unsure about but something like:
>
> $ mkdir initrd.ucode.tree
> $ cd initrd.ucode.tree
> $ cat /boot/initrd.img | cpio -id
> $ find
> .
> ./kernel
> ./kernel/x86
> ./kernel/x86/microcode
> ./kernel/x86/microcode/GenuineIntel.bin
> $ find | cpio -o -H newc > ../initrd.ucode
That interesting. Your steps lead to an initrd with the same size as the 
initrd created by the Debian tools. But the new one is working with 
ucode=scan, the old one isnât.
> BTW, could you please post the output "xl dmesg" for the failing case, I
> should have asked for that right at the start in case it contains
> anything of use.
I can do this, but neither âxl dmesgâ nor âdmesgâ are telling anything 
about microcode. Are there ways to make the hypervisor more verbose?
Shade and sweet water!
        
        Stephan

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