[Xen-devel] [PATCH RFC 0/7] xen: Clean-up of mem_event subsystem

[Tamas K Lengyel <tamas.lengyel@xxxxxxxxxxxx>]

This patch series aims to clean up the mem_event subsystem within Xen. The
original use-case for this system was to allow external helper applications
running in privileged domains to control various memory operations performed
by Xen. Amongs these were paging, sharing and access control. The subsystem
has since been extended to also deliver non-memory related events, namely
various HVM debugging events (INT3, MTF, MOV-TO-CR). The structures and naming
of related functions however has not caught up to these new use-cases, thus
leaving many ambigouities in the code.

In this series we convert the mem_event structures to a union of sub-structures
which clearly define the scope of information that is transmitted via the event
delivery mechanism. Afterwards, we clean up the naming of the structures and
related functions to more clearly be in line with their actual operations.

This PATCH RFC series is also available at:
https://github.com/tklengyel/xen/tree/mem_event_cleanup

Razvan Cojocaru (1):
  xen/mem_event: Cleanup of mem_event structures

Tamas K Lengyel (6):
  xen/mem_event: Rename the mem_event ring from 'access' to 'monitor'
  xen/mem_paging: Convert mem_event_op to mem_paging_op
  x86/hvm: rename hvm_memory_event_* functions to hvm_event_*
  xen/mem_event: Rename mem_event to vm_event
  xen/vm_event: Decouple vm_event and mem_access.
  tools/tests: Remove superfluous and incomplete spinlock from
    xen-access

 docs/misc/pvh-readme.txt            |   2 +-
 tools/libxc/Makefile                |   2 +-
 tools/libxc/xc_domain_restore.c     |  14 +-
 tools/libxc/xc_domain_save.c        |   4 +-
 tools/libxc/xc_hvm_build_x86.c      |   2 +-
 tools/libxc/xc_mem_access.c         |  10 +-
 tools/libxc/xc_mem_event.c          | 178 ---------
 tools/libxc/xc_mem_paging.c         |  38 +-
 tools/libxc/xc_memshr.c             |  12 +-
 tools/libxc/xc_private.h            |   9 +-
 tools/libxc/xc_vm_event.c           | 162 ++++++++
 tools/libxc/xg_save_restore.h       |   2 +-
 tools/tests/xen-access/xen-access.c | 187 ++++-----
 tools/xenpaging/pagein.c            |   2 +-
 tools/xenpaging/xenpaging.c         | 150 ++++----
 tools/xenpaging/xenpaging.h         |   8 +-
 xen/arch/x86/domain.c               |   2 +-
 xen/arch/x86/domctl.c               |   4 +-
 xen/arch/x86/hvm/emulate.c          |   4 +-
 xen/arch/x86/hvm/hvm.c              | 171 +++++----
 xen/arch/x86/hvm/vmx/vmcs.c         |   4 +-
 xen/arch/x86/hvm/vmx/vmx.c          |   6 +-
 xen/arch/x86/mm/hap/nested_ept.c    |   4 +-
 xen/arch/x86/mm/hap/nested_hap.c    |   4 +-
 xen/arch/x86/mm/mem_paging.c        |  16 +-
 xen/arch/x86/mm/mem_sharing.c       |  31 +-
 xen/arch/x86/mm/p2m-pod.c           |   4 +-
 xen/arch/x86/mm/p2m-pt.c            |   4 +-
 xen/arch/x86/mm/p2m.c               | 139 +++----
 xen/arch/x86/x86_64/compat/mm.c     |  12 +-
 xen/arch/x86/x86_64/mm.c            |  12 +-
 xen/common/Makefile                 |   2 +-
 xen/common/domain.c                 |  12 +-
 xen/common/domctl.c                 |   6 +-
 xen/common/mem_access.c             |  24 +-
 xen/common/mem_event.c              | 742 ------------------------------------
 xen/common/vm_event.c               | 742 ++++++++++++++++++++++++++++++++++++
 xen/drivers/passthrough/pci.c       |   2 +-
 xen/include/asm-arm/p2m.h           |   6 +-
 xen/include/asm-x86/domain.h        |   4 +-
 xen/include/asm-x86/hvm/emulate.h   |   2 +-
 xen/include/asm-x86/hvm/hvm.h       |  12 +-
 xen/include/asm-x86/mem_paging.h    |   2 +-
 xen/include/asm-x86/p2m.h           |  16 +-
 xen/include/public/domctl.h         |  44 +--
 xen/include/public/hvm/params.h     |   2 +-
 xen/include/public/mem_event.h      | 134 -------
 xen/include/public/memory.h         |   6 +-
 xen/include/public/vm_event.h       | 179 +++++++++
 xen/include/xen/mem_access.h        |   4 +-
 xen/include/xen/mem_event.h         | 143 -------
 xen/include/xen/p2m-common.h        |   4 +-
 xen/include/xen/sched.h             |  24 +-
 xen/include/xen/vm_event.h          |  87 +++++
 xen/include/xsm/dummy.h             |   6 +-
 xen/include/xsm/xsm.h               |  14 +-
 xen/xsm/dummy.c                     |   6 +-
 xen/xsm/flask/hooks.c               |  36 +-
 xen/xsm/flask/policy/access_vectors |   2 +-
 59 files changed, 1700 insertions(+), 1762 deletions(-)
 delete mode 100644 tools/libxc/xc_mem_event.c
 create mode 100644 tools/libxc/xc_vm_event.c
 delete mode 100644 xen/common/mem_event.c
 create mode 100644 xen/common/vm_event.c
 delete mode 100644 xen/include/public/mem_event.h
 create mode 100644 xen/include/public/vm_event.h
 delete mode 100644 xen/include/xen/mem_event.h
 create mode 100644 xen/include/xen/vm_event.h

-- 
2.1.1


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