[PATCH v11 00/10] Add support for SVM atomics in Nouveau

[Alistair Popple <apopple@nvidia.com>]

Hi Andrew,

This is my series to add support for SVM atomics in Nouveau rebased onto
v5.13-rc6-mmots-2021-06-15-20-28. Functionally there are no changes from
the previous v10, however some changes were made during the rebase. If
anyone would like to see a diff-of-diffs I can post it but my exhaustive
(assuming I didn't miss anything in the diff-of-diff) summary below is
probably easier to read.

Hugh - based on our previous disscussion I'm reasonably confident I haven't
missed anything from you in the rebase, but patch 4 ("Split migration into
its own function") might be worth looking at as that contained the largest
conflicts. Thanks.

[PATCH 01/10] mm: Remove special swap entry functions

- Fixed migration_entry_to_page() reference in __split_huge_pmd_locked()
  introduced by Hugh's "mm/thp: fix __split_huge_pmd_locked() on shmem
  migration entry".

- Fixed migration_entry_to_page() reference in page_vma_mapped_walk()
  changed by Hugh in "mm: page_vma_mapped_walk(): prettify PVMW_MIGRATION
  block"

[PATCH 02/10] mm/swapops: Rework swap entry manipulation code

- No changes required.

[PATCH 03/10] mm/rmap: Split try_to_munlock from try_to_unmap

- No changes required.

[PATCH 04/10] mm/rmap: Split migration into its own function

- Updated try_to_migrate_one() and try_to_migrate() to accept TTU_SYNC
  flag.

- Updated mmu notifier range calculation in try_to_migrate_one() to use
  vma_address_end() introduced by Hugh in "mm/thp: fix vma_address() if
  virtual address below file offset".

- Update to unmap_page() in mm/hugh_memory.c to pass TTU_SYNC and check
  page_mapped() now that try_to_{unmap|migrate} return void.

[PATCH 05/10] mm: Rename migrate_pgmap_owner

- Added Peter's Reviewed-by.

[PATCH 06/10] mm/memory.c: Allow different return codes for copy_non_present_pte()

- Updated call to copy_nonpresent_pte() for extra arguments added by Peter
  in "mm/userfaultfd: fix uffd-wp special cases for fork()".

- Added Peter's Reviewed-by.

[PATCH 07/10] mm: Device exclusive memory access

- s/vma/src_vma/ in copy_nonpresent_pte() due to "mm/userfaultfd: fix
  uffd-wp special cases for fork()".

- Skip calling rmap_walk on tail pages.

[PATCH 08/10] mm: Selftests for exclusive device memory

- Squashed in a fix from Colin King (see
  https://lore.kernel.org/kernel-janitors/20210526170530.3766167-1-colin.king@canonical.com/).
  Not sure what the best way of attributing that is though given it was
  against next.

[PATCH 09/10] nouveau/svm: Refactor nouveau_range_fault

- No changes.

[PATCH 10/10] nouveau/svm: Implement atomic SVM access

- No changes.

Alistair Popple (10):
  mm: Remove special swap entry functions
  mm/swapops: Rework swap entry manipulation code
  mm/rmap: Split try_to_munlock from try_to_unmap
  mm/rmap: Split migration into its own function
  mm: Rename migrate_pgmap_owner
  mm/memory.c: Allow different return codes for copy_nonpresent_pte()
  mm: Device exclusive memory access
  mm: Selftests for exclusive device memory
  nouveau/svm: Refactor nouveau_range_fault
  nouveau/svm: Implement atomic SVM access

 Documentation/vm/hmm.rst                      |  19 +-
 Documentation/vm/unevictable-lru.rst          |  33 +-
 arch/s390/mm/pgtable.c                        |   2 +-
 drivers/gpu/drm/nouveau/include/nvif/if000c.h |   1 +
 drivers/gpu/drm/nouveau/nouveau_svm.c         | 156 ++++-
 drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmm.h |   1 +
 .../drm/nouveau/nvkm/subdev/mmu/vmmgp100.c    |   6 +
 fs/proc/task_mmu.c                            |  23 +-
 include/linux/mmu_notifier.h                  |  26 +-
 include/linux/rmap.h                          |  11 +-
 include/linux/swap.h                          |  13 +-
 include/linux/swapops.h                       | 123 ++--
 lib/test_hmm.c                                | 127 +++-
 lib/test_hmm_uapi.h                           |   2 +
 mm/debug_vm_pgtable.c                         |  12 +-
 mm/hmm.c                                      |  12 +-
 mm/huge_memory.c                              |  48 +-
 mm/hugetlb.c                                  |  10 +-
 mm/memcontrol.c                               |   2 +-
 mm/memory.c                                   | 175 ++++-
 mm/migrate.c                                  |  51 +-
 mm/mlock.c                                    |  12 +-
 mm/mprotect.c                                 |  18 +-
 mm/page_vma_mapped.c                          |  15 +-
 mm/rmap.c                                     | 612 +++++++++++++++---
 tools/testing/selftests/vm/hmm-tests.c        | 158 +++++
 26 files changed, 1341 insertions(+), 327 deletions(-)

-- 
2.20.1