[RFC][PATCH 0/4] Add V4V to Xen

[Jean Guyader <jean.guyader@citrix.com>]

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v4 changes:
        - Stop using ssize_t, use long instead
        - Return -MSGSIZE for message bigger than 2GB
        - Fixup size handling
        - Rename protocol with message_type to avoid the
          confusion with the IP protocol flag
        - Replaced V4V_DOMID_ANY value with DOMID_INVALID
        - Replaced v4v_pfn_t with xen_pfn_t
        - Add padding to struct v4v_info
        - Fixup hypercall documentation
        - Move V4V_ROUNDUP to v4v.c
        - Remove v4v_utils.h (we could potentially add it later).

v3 changes:
        - Switch to event channel
                - Allocated a unbound event channel
                  per domain.
                - Add a new v4v call to share the
                  event channel port.
        - Public headers with actual type definition
        - Align all the v4v type to 64 bits
        - Modify v4v MAGIC numbers because we won't
          but backward compatible anymore
        - Merge insert and insertv
        - Merge send and sendv
        - Turn all the lock prerequisite from comment
          to ASSERT()
        - Make use or write_atomic instead of volatile pointers
        - Merge v4v_memcpy_to_guest_ring and
          v4v_memcpy_to_guest_ring_from_guest
                - Introduce copy_from_guest_maybe that can take
                  a void * and a handle as src address.
        - Replace 6 arguments hypercalls with 5 arguments hypercalls.

v2 changes:
        - Cleanup plugin header
        - Include basic access control
        - Use guest_handle_for_field

Jan Beulich (1):
  xen: Introduce guest_handle_for_field

Jean Guyader (3):
  xen: virq, remove VIRQ_XC_RESERVED
  xen: events, exposes evtchn_alloc_unbound_domain
  xen: Add V4V implementation

 xen/arch/x86/hvm/hvm.c             |    9 +-
 xen/arch/x86/x86_32/entry.S        |    2 +
 xen/arch/x86/x86_64/compat/entry.S |    2 +
 xen/arch/x86/x86_64/entry.S        |    2 +
 xen/common/Makefile                |    1 +
 xen/common/domain.c                |   13 +-
 xen/common/event_channel.c         |   39 +-
 xen/common/v4v.c                   | 1907 ++++++++++++++++++++++++++++++++++++
 xen/include/asm-x86/guest_access.h |    3 +
 xen/include/public/v4v.h           |  305 ++++++
 xen/include/public/xen.h           |    3 +-
 xen/include/xen/event.h            |    3 +
 xen/include/xen/sched.h            |    4 +
 xen/include/xen/v4v.h              |  133 +++
 14 files changed, 2408 insertions(+), 18 deletions(-)
 create mode 100644 xen/common/v4v.c
 create mode 100644 xen/include/public/v4v.h
 create mode 100644 xen/include/xen/v4v.h

-- 
1.7.9.5


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