[PATCH v10 0/3] mm/hmm/test: add self tests for HMM

[Ralph Campbell]

This series adds basic self tests for HMM and are intended for Jason
Gunthorpe's rdma tree since he is making some HMM related changes that
this can help test.

Changes v9 -> v10:
Patches 1 & 2 include Jason's changes from his cover letter:
https://lkml.org/lkml/2020/4/21/1320
Patch 3 now adds the files alphbetically and removed the outdated
reference to include/uapi/linux.

Changes v8 -> v9:
Rebased to linux-5.7.0-rc1.
Moved include/uapi/linux/test_hmm.h to lib/test_hmm_uapi.h
Added calls to release_mem_region() to free device private addresses
Applied Jason's suggested changes for v8.
Added a check for no VMA read access before migrating to device private
  memory.

Changes v7 -> v8:
Rebased to Jason's rdma/hmm tree, plus Jason's 6 patch series
  "Small hmm_range_fault() cleanups".
Applied a number of changes from Jason's comments.

Changes v6 -> v7:
Rebased to linux-5.6.0-rc6
Reverted back to just using mmu_interval_notifier_insert() and making
  this series only introduce HMM self tests.

Changes v5 -> v6:
Rebased to linux-5.5.0-rc6
Refactored mmu interval notifier patches
Converted nouveau to use the new mmu interval notifier API

Changes v4 -> v5:
Added mmu interval notifier insert/remove/update callable from the
  invalidate() callback
Updated HMM tests to use the new core interval notifier API

Changes v1 -> v4:
https://lore.kernel.org/linux-mm/20191104222141.5173-1-rcampbell@xxxxxxxxxx

Ralph Campbell (3):
  mm/hmm/test: add selftest driver for HMM
  mm/hmm/test: add selftests for HMM
  MAINTAINERS: add HMM selftests

 MAINTAINERS                            |    2 +
 lib/Kconfig.debug                      |   13 +
 lib/Makefile                           |    1 +
 lib/test_hmm.c                         | 1149 ++++++++++++++++++++
 lib/test_hmm_uapi.h                    |   59 +
 tools/testing/selftests/vm/.gitignore  |    1 +
 tools/testing/selftests/vm/Makefile    |    3 +
 tools/testing/selftests/vm/config      |    2 +
 tools/testing/selftests/vm/hmm-tests.c | 1359 ++++++++++++++++++++++++
 tools/testing/selftests/vm/run_vmtests |   16 +
 tools/testing/selftests/vm/test_hmm.sh |   97 ++
 11 files changed, 2702 insertions(+)
 create mode 100644 lib/test_hmm.c
 create mode 100644 lib/test_hmm_uapi.h
 create mode 100644 tools/testing/selftests/vm/hmm-tests.c
 create mode 100755 tools/testing/selftests/vm/test_hmm.sh

-- 
2.25.2