[Xen-devel] [PATCH 0 of 2] RFC Switch mem event ABI from domctl to memops

[Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>]

Swith mem event per page operations from domctl to XENMEM_* interface. Improve
scalabilty.

Looking for further feedback on the proposed ABI change.

This code has been tested to work generally well, save for a few blue screens.
It might be that removing the global domctl lock uncovers hidden races.

Signed-off-by: Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>
Signed-off-by: Adin Scannell <adin@xxxxxxxxxxx>

 tools/libxc/xc_mem_access.c          |   12 +-
 tools/libxc/xc_mem_event.c           |   23 +++-
 tools/libxc/xc_mem_paging.c          |   44 ++++----
 tools/libxc/xc_memshr.c              |  182 ++++++++++++++++------------------
 tools/libxc/xenctrl.h                |    6 +-
 tools/memshr/interface.c             |    4 +-
 tools/tests/mem-sharing/memshrtool.c |    4 +-
 xen/arch/x86/domctl.c                |    1 -
 xen/arch/x86/mm/mem_access.c         |    7 +-
 xen/arch/x86/mm/mem_event.c          |   68 ++++++++++--
 xen/arch/x86/mm/mem_paging.c         |   13 +-
 xen/arch/x86/mm/mem_sharing.c        |  101 +++++++++++-------
 xen/arch/x86/x86_64/compat/mm.c      |   23 ++++
 xen/arch/x86/x86_64/mm.c             |   23 ++++
 xen/include/asm-x86/mem_access.h     |    3 +-
 xen/include/asm-x86/mem_event.h      |    2 +
 xen/include/asm-x86/mem_paging.h     |    3 +-
 xen/include/asm-x86/mem_sharing.h    |    3 +
 xen/include/public/domctl.h          |   90 +++-------------
 xen/include/public/memory.h          |   87 ++++++++++++++++
 tools/libxc/xc_memshr.c              |   11 ++
 tools/libxc/xenctrl.h                |    1 +
 tools/tests/mem-sharing/memshrtool.c |   11 ++
 xen/arch/x86/mm/mem_sharing.c        |   13 +-
 xen/arch/x86/x86_64/compat/mm.c      |    3 +
 xen/arch/x86/x86_64/mm.c             |    2 +
 xen/include/asm-x86/mem_sharing.h    |    3 +-
 xen/include/public/memory.h          |    1 +
 28 files changed, 460 insertions(+), 284 deletions(-)

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