Re: [PATCH v3 0/3] drm/xe: add VM_BIND DECOMPRESS support and on‑demand decompression

[Matthew Brost <matthew.brost@intel.com>]

On Wed, Oct 15, 2025 at 04:17:06PM +0530, Nitin Gote wrote:
> This series implements VM_BIND decompression support in the XE driver
> for both non-fault mode and fault mode.
> 
> Tested with https://patchwork.freedesktop.org/series/154711/
> which validates basic VM_BIND DECOMPRESS behavior for both
> regular and FAULT_MODE VMs.
> 

This series is getting close to being ready to merged - I'll do another
review shortly. But to merge this we will need a UMD PR which uses this
new uAPI. Has the compute UMD tested this code yet? Can you see if they
can post a PR which can be referenced in the cover letter?

Matt 

> v3: (Matt)
>    - s/xe_bo_schedule_decompress/xe_bo_decompress
>    - skip the decrompress step if the BO isn't in VRAM
>    - start/size not required in xe_bo_schedule_decompress
>    - Use xe_bo_move_notify instead of xe_vm_invalidate_vma
>      with respect to invalidation.
>    - Nits
>  
> v2:
>    - Add kernel doc (Matt)
>    - Move decompression work out of vm_bind ioctl. (Matt)
>    - Put that work in a small helper at the BO/migrate layer invoke it
>      from vma_lock_and_validate which already runs under drm_exec.
>    - Move lightweight checks to vm_bind_ioctl_check_args (Matthew Auld)
> 
> 
> Nitin Gote (3):
>   drm/xe: add VM_BIND DECOMPRESS uapi flag
>   drm/xe: add xe_migrate_resolve wrapper and is_vram_resolve support
>   drm/xe: implement VM_BIND decompression in vm_bind_ioctl
> 
>  drivers/gpu/drm/xe/xe_bo.c       | 50 ++++++++++++++++++
>  drivers/gpu/drm/xe/xe_bo.h       |  2 +
>  drivers/gpu/drm/xe/xe_migrate.c  | 90 ++++++++++++++++++++++----------
>  drivers/gpu/drm/xe/xe_migrate.h  |  7 +++
>  drivers/gpu/drm/xe/xe_vm.c       | 40 ++++++++++----
>  drivers/gpu/drm/xe/xe_vm_types.h |  2 +
>  include/uapi/drm/xe_drm.h        |  8 +++
>  7 files changed, 161 insertions(+), 38 deletions(-)
> 
> -- 
> 2.25.1
>