Re: EFI and multiboot2 devlopment work for Xen

[Jan Beulich]

>>> On 22.10.13 at 15:53, Ian Campbell <ian.campbell@xxxxxxxxxx> wrote:
> On Tue, 2013-10-22 at 09:42 -0400, Konrad Rzeszutek Wilk wrote:
> 
>> Looking at the Fedora GRUB2 source, the 'struct linux_kernel_header' is 
> defined
>> in the linux/Documentation/x86/boot.txt and hpa is pretty strict
>> about making it backwards compatible. It also seems to support Xen!
>> 
>> (Interestingly enough we do have this structure in the code: see
>> setup_header in arch/x86/bzimage.c)
> 
> There will be another usage in tools/libxc/...bzimage too
> 
> FWIW I think we only use this stuff for the magic number/version and the
> payload_offset/length fields, which we do in order to extract the
> payload (ELF file) for booting dom0 and domU. It's not AFAIK used for
> booting Xen itself or lets say, that's not why I added it ;-)).

Indeed, we only use this to handle bzImage type kernels.

Jan

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