Add basic support to run various MIPS variants via kunit_tool using the
virtualized malta platform.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@linutronix.de>
---
Changes in v4:
- Rebase on v6.16-rc1
- Pick up reviews from David
- Clarify that GIC page is linked to vDSO
- Link to v3: https://lore.kernel.org/r/20250415-kunit-mips-v3-0-4ec2461b5a7e@linutronix.de

Changes in v3:
- Also skip VDSO_RANDOMIZE_SIZE adjustment for kthreads
- Link to v2: https://lore.kernel.org/r/20250414-kunit-mips-v2-0-4cf01e1a29e6@linutronix.de

Changes in v2:
- Fix usercopy kunit test by handling ABI-less tasks in stack_top()
- Drop change to mm initialization.
  The broken test is not built by default anymore.
- Link to v1: https://lore.kernel.org/r/20250212-kunit-mips-v1-0-eb49c9d76615@linutronix.de

---
Thomas Weißschuh (2):
      MIPS: Don't crash in stack_top() for tasks without ABI or vDSO
      kunit: qemu_configs: Add MIPS configurations

 arch/mips/kernel/process.c                   | 16 +++++++++-------
 tools/testing/kunit/qemu_configs/mips.py     | 18 ++++++++++++++++++
 tools/testing/kunit/qemu_configs/mips64.py   | 19 +++++++++++++++++++
 tools/testing/kunit/qemu_configs/mips64el.py | 19 +++++++++++++++++++
 tools/testing/kunit/qemu_configs/mipsel.py   | 18 ++++++++++++++++++
 5 files changed, 83 insertions(+), 7 deletions(-)
---
base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494
change-id: 20241014-kunit-mips-e4fe1c265ed7

Best regards,
-- 
Thomas Weißschuh <thomas.weissschuh@linutronix.de>