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

[Oleksandr Andrushchenko <andr2000@xxxxxxxxx>]

Hi, Stefano!

I'm just curious if the below is on your TODO list [1]:

3. Future Directions:
====================================================

Allow users to optionally share *mfn-contiguous* pages.

Thank you,
Oleksandr

On 05/25/2018 03:55 AM, Stefano Stabellini wrote:
> 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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[1] https://lists.xen.org/archives/html/xen-devel/2017-08/msg03242.html

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