[Xen-devel] [PATCH v8 0/8] 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


Main changes in v8:
- remove "add xen,dmabuf nodes" patch
- add "map reserved-memory regions as normal memory in dom0" patch
- send new device tree binding request to devicetree.org



The following changes since commit 85b00385827e4e061b2ff38b549c03d0f1e66b6a:

  xen/sched: Drop set_current_state() (2018-10-08 18:34:55 +0100)

are available in the git repository at:

  http://xenbits.xenproject.org/git-http/people/sstabellini/xen-unstable.git 
share_mem-v8

for you to fetch changes up to fc00e34ce9924b5915deacd881ae7cd6888510ba:

  xen/arm: map reserved-memory regions as normal memory in dom0 (2018-10-08 
16:34:09 -0700)

----------------------------------------------------------------
Stefano Stabellini (2):
      xen/arm: export shared memory regions as reserved-memory on device tree
      xen/arm: map reserved-memory regions as normal memory in dom0

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                        |   8 +
 tools/libxl/libxl_arch.h                   |   8 +-
 tools/libxl/libxl_arm.c                    |  76 ++++-
 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                  | 206 ++++++++++++
 tools/libxl/libxlutil.h                    |   6 +
 tools/xl/xl_parse.c                        |  25 +-
 xen/arch/arm/domain_build.c                |   7 +
 xen/arch/arm/mm.c                          |   7 +-
 xen/include/public/memory.h                |   8 +
 xen/include/xsm/dummy.h                    |  14 +
 xen/include/xsm/xsm.h                      |   6 +
 xen/xsm/dummy.c                            |   1 +
 xen/xsm/flask/hooks.c                      |   9 +
 xen/xsm/flask/policy/access_vectors        |   5 +
 26 files changed, 1315 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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