[PATCH v6 8/9] drm/xe/vf: Refresh utilization buffer during migration recovery

[Michał Winiarski]

On Fri, Jul 04, 2025 at 11:02:27PM +0200, Tomasz Lis wrote:
> The WA buffer we use to capture context utilization contains GGTT
> references. This means its instructions have to be either fixed or
> re-emitted during VF post-migration recovery.
> 
> This patch adds re-emitting content of the utilization WA BB during
> the recovery.
> 
> The way we write to vram requires scratch buffer to be used before
> the whole block is memcopied. We are re-using a scratch buffer
> introduced in earlier part of the recovery.
> 
> v2: Notable rebase after "Prepare WA BB setup for more users" patch
> 
> Signed-off-by: Tomasz Lis <tomasz.lis at intel.com>
> Cc: Michal Wajdeczko <michal.wajdeczko at intel.com>
> Cc: Michal Winiarski <michal.winiarski at intel.com>

Needs to be rebased onto current drm-tip (and the tmp buffer allocation
should probably be shifted down the stack).
But still:

Reviewed-by: Michał Winiarski <michal.winiarski at intel.com>

Thanks,
-Michał

> ---
>  drivers/gpu/drm/xe/xe_exec_queue.c |  1 +
>  drivers/gpu/drm/xe/xe_lrc.c        | 54 ++++++++++++++++++++----------
>  drivers/gpu/drm/xe/xe_lrc.h        |  4 +++
>  drivers/gpu/drm/xe/xe_sriov_vf.c   |  2 +-
>  4 files changed, 42 insertions(+), 19 deletions(-)