[PATCH v6 0/7] Allow setting up shared memory areas between VMs from xl config files

[Stefano Stabellini <sstabellini@kernel.org>]

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

Changes in v6:
- clarify memory allocation in the man page
- add a patch to expose shared memory as reserved-memory on device tree


The following changes since commit 6aaa9fb308171ec58ddf4cf058ad5341f81a65cf:

  hvm/altp2m: Clarify the proper way to extend the altp2m interface (2018-07-31 16:14:01 +0100)

are available in the git repository at:

  http://xenbits.xenproject.org/git-http/people/sstabellini/xen-unstable.git share_mem-v6

for you to fetch changes up to 9a7bc6a17eb48905eee7b15895dd76acac49a27b:

  xen/arm: export shared memory regions as reserved-memory on device tree (2018-07-31 11:11:28 -0700)

----------------------------------------------------------------
Stefano Stabellini (1):
      xen/arm: export shared memory regions as reserved-memory on device tree

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 | 264 +++++++++++++++
 docs/man/xl.cfg.pod.5.in                   |   8 +
 docs/misc/xenstore-paths.markdown          |  47 +++
 tools/flask/policy/modules/xen.if          |   2 +
 tools/libxl/Makefile                       |   5 +-
 tools/libxl/libxl.h                        |   6 +
 tools/libxl/libxl_arch.h                   |   8 +-
 tools/libxl/libxl_arm.c                    |  67 +++-
 tools/libxl/libxl_create.c                 |  27 ++
 tools/libxl/libxl_dom.c                    |   2 +-
 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                    |  21 +-
 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 +
 25 files changed, 1302 insertions(+), 12 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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