Re: [Xen-devel] [PATCH v7 00/11] grub-xen: support booting huge pv-domains

[Juergen Gross <jgross@xxxxxxxx>]

Gentle ping...

On 03/03/16 10:38, Juergen Gross wrote:
> The Xen hypervisor supports starting a dom0 with large memory (up to
> the TB range) by not including the initrd and p2m list in the initial
> kernel mapping. Especially the p2m list can grow larger than the
> available virtual space in the initial mapping.
> 
> The started kernel is indicating the support of each feature via
> elf notes.
> 
> This series enables grub-xen to do the same as the hypervisor.
> 
> Tested with:
> - 32 bit domU (kernel not supporting unmapped initrd)
> - 32 bit domU (kernel supporting unmapped initrd)
> - 1 GB 64 bit domU (kernel supporting unmapped initrd, not p2m)
> - 1 GB 64 bit domU (kernel supporting unmapped initrd and p2m)
> - 900GB 64 bit domU (kernel supporting unmapped initrd and p2m)
> 
> Changes in V7:
> - patch 9: set initrd size once instead of in if and else clause as requested
>   by Daniel Kiper
> - patch 10: add GRUB_PACKED attribute to structure, drop alignments in 
> assembly
>   files as requested by Daniel Kiper
> 
> Changes in V6:
> - patch 9: rename grub_xen_alloc_final() as requested by Daniel Kiper
> 
> Changes in V5:
> - patch 2: set grub_errno to GRUB_ERR_NONE to avoid false error reports as
>   requested by Daniel Kiper
> - patch 9: let call grub_xen_alloc_final() all subfunctions unconditionally
>   and let them decide whether they need to do anything as suggested by
>   Daniel Kiper
> 
> Changes in V4:
> - split patch 1 into two patches as requested by Daniel Kiper
> - patch 9 (was 8): rename grub_xen_alloc_end() as requested by Daniel Kiper
> - patch 10 (was 9): align variables in assembly sources,
>   use separate structure define as requested by Daniel Kiper
> 
> Changes in V3:
> - added new patch 1 (free memory in case of error) as requested by
>   Daniel Kiper
> - added new patch 2 (avoid global variables) as requested by Daniel Kiper
> - added new patch 3 (use constants for elf notes) as requested by Daniel Kiper
> - added new patch 4 (sync with new Xen headers) in order to use constants
>   in assembly code
> - modified patch 9 (was patch 5) to use constants instead of numbers as
>   requested by Daniel Kiper
> 
> Changes in V2:
> - rebased patch 5 to current master
> 
> Juergen Gross (11):
>   xen: make xen loader callable multiple times
>   xen: avoid memleaks on error
>   xen: reduce number of global variables in xen loader
>   xen: add elfnote.h to avoid using numbers instead of constants
>   xen: synchronize xen header
>   xen: factor out p2m list allocation into separate function
>   xen: factor out allocation of special pages into separate function
>   xen: factor out allocation of page tables into separate function
>   xen: add capability to load initrd outside of initial mapping
>   xen: modify page table construction
>   xen: add capability to load p2m list outside of kernel mapping
> 
>  grub-core/lib/i386/xen/relocator.S   |  87 ++--
>  grub-core/lib/x86_64/xen/relocator.S | 134 +++---
>  grub-core/lib/xen/relocator.c        |  28 +-
>  grub-core/loader/i386/xen.c          | 778 
> +++++++++++++++++++++++------------
>  grub-core/loader/i386/xen_fileXX.c   |  45 +-
>  include/grub/i386/memory.h           |   7 +
>  include/grub/xen/relocator.h         |   6 +-
>  include/grub/xen_file.h              |   3 +
>  include/xen/arch-x86/xen-x86_32.h    |  22 +-
>  include/xen/arch-x86/xen-x86_64.h    |   8 +-
>  include/xen/elfnote.h                | 281 +++++++++++++
>  include/xen/xen.h                    | 125 ++++--
>  12 files changed, 1076 insertions(+), 448 deletions(-)
>  create mode 100644 include/xen/elfnote.h
> 


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