hvmloader-with-separated-bios-v6

Load BIOS via toolstack instead of been embedded in hvmloader.

Hi all,

V6:
  few changes detailed in patches.

  Missing acks on the following patches:
    1 libxc: Rework extra module initialisation
    2 libxc: Prepare a start info structure for hvmloader
    5 libxl: Load guest BIOS from file
    6 xen: Move the hvm_start_info C representation from libxc to public/xen.h
    8 hvmloader: Locate the BIOS blob
    9 hvmloader: Check modules whereabouts in perform_tests

Thanks.

Changes in V5:
  quite a few rework

  it as been suggest that "bios" was not quite right to name SeaBIOS/OVMF, so
  when I introduce a new name/variable instead of bios, I tried to use
  system_firmware which is more appropriate, I think, with regards to OVMF.
  Details of the changes in the patches.

  Other changes detailed patches description.

I've look at loading the BIOS via the toolstack instead of having them embedded
in the hvmloader binary. After this patch series, hvmloader compilation would
be indenpendant from SeaBIOS and OVMF compilation.

Here is a general view of the few step to load the BIOS:
- libxl load the BIOS blob into it's memory and add it to struct
  xc_hvm_build_args.system_firmware_module
- libxc load the blob into the guest memory and fill the struct
  hvm_start_info and store a name for each module into the module cmdline.
- hvmloader read the addresses from the hvm_start_info, find out which
  module to load and copy the blob to the right place.

A git tree can be found here:
git://xenbits.xen.org/people/aperard/xen-unstable.git
tag: hvmloader-with-separated-bios-v6

Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Jan Beulich <jbeulich@suse.com>

Regards,