[Xen-devel] [PATCH 0/7][RFC] make xenguest save & restore functions reentrant

[Vincent Hanquez <vincent.hanquez@xxxxxxxxxxxxx>]

The following patchset make suspend and restore code reentrant by having an
explicit context to store current variables across all the suspend/restore code.

This work is necessary for beeing able to get rid of the fork of processes
during save&restore, and provide a simpler interface for toolstack developers.

it hasn't been properly stress tested yet.

Vincent Hanquez (7):
  add explicit parameter to macros instead of assuming symbol name
    available on the stack or as a global variable.
  p2m_size is unnecessarily passed as a parameter when it's available
    as a global variable.
  move global variable in suspend into a global context
  move the suspend_ctx on the save stack instead of a global one
  alias i/FPP(guest_width) as p2m_index and replace every usage
  move restore global variable into a global context
  pass restore context as an argument instead of a global context

 tools/libxc/xc_core.c           |    2 +-
 tools/libxc/xc_core_x86.c       |   20 ++--
 tools/libxc/xc_domain_restore.c |  331 +++++++++++++++++++--------------------
 tools/libxc/xc_domain_save.c    |  243 ++++++++++++++---------------
 tools/libxc/xc_offline_page.c   |    8 +-
 tools/libxc/xc_resume.c         |   12 +-
 tools/libxc/xg_private.h        |   16 +-
 tools/libxc/xg_save_restore.h   |   22 ++--
 8 files changed, 324 insertions(+), 330 deletions(-)


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