[PATCH v2 0/2] drm/imagination: Switch the GPUVM to immediate mode

[Gyeyoung Baek]

Switch the GPUVM to immediate mode, as a prerequisite for asynchronous
VM_BIND. A revised VM_BIND series will follow separately; v1 [1] is
linked only for context.

The switch also fixes an issue Sashiko reported on [1]: the GPUVA lists
of other objects are updated without holding their reservations [2].

Based on drm-misc-fixes (depends on 196d4d10c1b3).

Tested on BeagleY-AI with lockdep, KASAN and failslab enabled:
- All IGT imagination tests pass, including pvr_vm_map [3].
- The fail-nth reproducer in patch 1 no longer warns.

[1] https://lore.kernel.org/r/20260817-pvr-vm-bind-v1-0-0a0f21be7d38@xxxxxxxxx
[2] https://sashiko.dev/#/patchset/20260817-pvr-vm-bind-v1-0-0a0f21be7d38@xxxxxxxxx?part=1
[3] https://lore.kernel.org/igt-dev/20260930125057.1837788-1-gye976@xxxxxxxxx/

Signed-off-by: Gyeyoung Baek <gye976@xxxxxxxxx>
---
Changes in v2:
- Patch 1: drain the vm_bo that fini() deferred when map_init() fails.
  (Sashiko)
- Link to v1: https://patch.msgid.link/20261011-pvr-gpuvm-immediate-v1-0-5b298dfce4f8@xxxxxxxxx

---
Gyeyoung Baek (2):
      drm/imagination: Switch the GPUVM to immediate mode
      drm/imagination: Stop locking reservations around map and unmap

 drivers/gpu/drm/imagination/pvr_vm.c | 82 +++++++++++++-----------------------
 1 file changed, 30 insertions(+), 52 deletions(-)
---
base-commit: 6ccf996a0dec1852dab94ad865f27b4904750e12
change-id: 20261011-pvr-gpuvm-immediate-f7ea8edc2e7f

Best regards,
--  
Gyeyoung Baek <gye976@xxxxxxxxx>