[PATCH i-g-t v3 0/4] tests/intel/xe_madvise: Add atomic madvise subtests

[Varun Gupta <varun.gupta@intel.com>]

Add three subtests to validate DRM_XE_MEM_RANGE_ATTR_ATOMIC madvise on
fault-mode SVM VMAs:

  atomic-device — GPU MI_ATOMIC_INC succeeds via fault handler
  atomic-global — CPU atomic increments + GPU MI_ATOMIC_INC with
                  fault-driven SMEM-to-VRAM migration
  atomic-cpu    — GPU MI_ATOMIC_INC rejected (-EACCES), engine reset

Patch 1 generalizes the test metadata and groups existing purgeable
subtests so the atomic subtests can coexist without being gated on
purgeable support.

v2:
  - Add UNMAP of CPU_ADDR_MIRROR binding before xe_vm_destroy in all
    three atomic tests (Nishit)
  - Add pagefault count print before/after exec in atomic-device and
    atomic-global (Nishit)
  - Add comment explaining single-engine rationale in atomic-cpu (Nishit)
v3:
  - Print pagefault count only when count changed (Nishit)

Varun Gupta (4):
  tests/intel/xe_madvise: Generalize metadata and group purgeable
    subtests
  tests/intel/xe_madvise: Add atomic-device subtest
  tests/intel/xe_madvise: Add atomic-global subtest
  tests/intel/xe_madvise: Add atomic-cpu subtest

 tests/intel/xe_madvise.c | 381 ++++++++++++++++++++++++++++++++++-----
 1 file changed, 338 insertions(+), 43 deletions(-)

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2.43.0