[Xen-devel] [PATCH v5 0/6] Allow setting up shared memory areas between VMs from xl config files

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

Hi,

This series implements a new xl config entry. Users can use the new
config entry to statically setup shared memory areas among VMs that
don't have grant table support so that they could communicate with each
other through the static shared memory areas.

It was originally developed by Zhongze, I am just updating the last few
issued that were address during the last round of reviews in January. I
tested the feature on ARM and works fine.

Cheers,

Stefano


Zhongze Liu (6):
      xen: xsm: flask: introduce XENMAPSPACE_gmfn_share for memory sharing
      libxl: introduce a new structure to represent static shared memory regions
      libxl: support mapping static shared memory areas during domain creation
      libxl: support unmapping static shared memory areas during domain 
destruction
      libxl:xl: add parsing code to parse "libxl_static_sshm" from xl config 
files
      docs: documentation about static shared memory regions

 docs/man/xl-static-shm-configuration.pod.5 | 257 +++++++++++++++
 docs/man/xl.cfg.pod.5.in                   |   8 +
 docs/misc/xenstore-paths.markdown          |  47 +++
 tools/flask/policy/modules/xen.if          |   2 +
 tools/libxl/Makefile                       |   4 +-
 tools/libxl/libxl.h                        |   6 +
 tools/libxl/libxl_arch.h                   |   6 +
 tools/libxl/libxl_arm.c                    |  15 +
 tools/libxl/libxl_create.c                 |  27 ++
 tools/libxl/libxl_domain.c                 |   5 +
 tools/libxl/libxl_internal.h               |  16 +
 tools/libxl/libxl_sshm.c                   | 512 +++++++++++++++++++++++++++++
 tools/libxl/libxl_types.idl                |  32 +-
 tools/libxl/libxl_x86.c                    |  19 ++
 tools/libxl/libxlu_sshm.c                  | 207 ++++++++++++
 tools/libxl/libxlutil.h                    |   6 +
 tools/xl/xl_parse.c                        |  25 +-
 xen/arch/arm/mm.c                          |   7 +-
 xen/include/public/memory.h                |   8 +
 xen/include/xsm/dummy.h                    |  15 +
 xen/include/xsm/xsm.h                      |   6 +
 xen/xsm/dummy.c                            |   1 +
 xen/xsm/flask/hooks.c                      |  12 +
 xen/xsm/flask/policy/access_vectors        |   5 +
 24 files changed, 1242 insertions(+), 6 deletions(-)
 create mode 100644 docs/man/xl-static-shm-configuration.pod.5
 create mode 100644 tools/libxl/libxl_sshm.c
 create mode 100644 tools/libxl/libxlu_sshm.c

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