[Xen-devel] [PATCH RFC 0/7] Mem_event and mem_access for ARM

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

The ARM virtualization extension provides 2-stage paging, a similar mechanisms
to Intel's EPT, which can be used to trace the memory accesses performed by
the guest systems. This series moves the mem_access and mem_event codebase
into Xen common, then sets up the necessary infrastructure in the ARM code
to deliver the event on R/W/X traps. Lastly, we turn on the compilation of
the xen-access test tool.

This is an early RFC on the series to solicite feedback. The series thus far
has only been boot-tested on an Arndale board.

The series is also available at:
https://github.com/tklengyel/xen/tree/arm_memaccess_rfc

Tamas K Lengyel (7):
  xen: Relocate mem_access and mem_event into common.
  xen/mem_event: Clean out superflous white-spaces
  xen/arm: Enable the compilation of mem_access and mem_event on ARM.
  tools/libxc: Allocate magic page for mem access on ARM
  xen/arm: Data abort exception (R/W) mem_events.
  xen/arm: Instruction prefetch abort (X) mem_event handling
  tools/tests: Enable xen-access on ARM

 tools/libxc/xc_dom_arm.c            |   6 +-
 tools/tests/xen-access/Makefile     |   4 +-
 tools/tests/xen-access/xen-access.c |  53 ++-
 xen/arch/arm/domctl.c               |  36 +-
 xen/arch/arm/mm.c                   |  18 +-
 xen/arch/arm/p2m.c                  | 412 ++++++++++++++++++---
 xen/arch/arm/traps.c                |  51 ++-
 xen/arch/x86/domctl.c               |   2 +-
 xen/arch/x86/hvm/hvm.c              |  61 +--
 xen/arch/x86/mm/Makefile            |   2 -
 xen/arch/x86/mm/hap/nested_ept.c    |   2 +-
 xen/arch/x86/mm/hap/nested_hap.c    |   2 +-
 xen/arch/x86/mm/mem_access.c        | 133 -------
 xen/arch/x86/mm/mem_event.c         | 705 -----------------------------------
 xen/arch/x86/mm/mem_paging.c        |   2 +-
 xen/arch/x86/mm/mem_sharing.c       |   2 +-
 xen/arch/x86/mm/p2m-pod.c           |   2 +-
 xen/arch/x86/mm/p2m-pt.c            |   2 +-
 xen/arch/x86/mm/p2m.c               |   2 +-
 xen/arch/x86/x86_64/compat/mm.c     |   4 +-
 xen/arch/x86/x86_64/mm.c            |   4 +-
 xen/common/Makefile                 |   2 +
 xen/common/domain.c                 |   1 +
 xen/common/mem_access.c             | 135 +++++++
 xen/common/mem_event.c              | 716 ++++++++++++++++++++++++++++++++++++
 xen/common/memory.c                 |  62 ++++
 xen/include/asm-arm/mm.h            |   1 -
 xen/include/asm-arm/p2m.h           | 109 ++++--
 xen/include/asm-arm/processor.h     |  10 +-
 xen/include/asm-x86/hvm/hvm.h       |   6 -
 xen/include/asm-x86/mem_access.h    |  39 --
 xen/include/asm-x86/mem_event.h     |  82 -----
 xen/include/asm-x86/mm.h            |   2 -
 xen/include/xen/mem_access.h        |  39 ++
 xen/include/xen/mem_event.h         |  98 +++++
 xen/include/xen/mm.h                |   6 +
 xen/include/xen/sched.h             |   1 -
 xen/include/xsm/dummy.h             |  24 +-
 xen/include/xsm/xsm.h               |  25 +-
 xen/xsm/dummy.c                     |   4 +-
 40 files changed, 1685 insertions(+), 1182 deletions(-)
 delete mode 100644 xen/arch/x86/mm/mem_access.c
 delete mode 100644 xen/arch/x86/mm/mem_event.c
 create mode 100644 xen/common/mem_access.c
 create mode 100644 xen/common/mem_event.c
 delete mode 100644 xen/include/asm-x86/mem_access.h
 delete mode 100644 xen/include/asm-x86/mem_event.h
 create mode 100644 xen/include/xen/mem_access.h
 create mode 100644 xen/include/xen/mem_event.h

-- 
2.0.1


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