diff options
| author | Matt Roper <matthew.d.roper@intel.com> | 2023-03-29 20:33:32 +0300 |
|---|---|---|
| committer | Rodrigo Vivi <rodrigo.vivi@intel.com> | 2023-12-20 02:30:26 +0300 |
| commit | 681818fdb97de821cc1ee6b81c7a09f3ef8fc96d (patch) | |
| tree | 354f9e01bb464e14dd2a907cb870be6c06cec03e /scripts/stackdelta | |
| parent | 3d4451d30f36ffe21f8c5eea7db9678330ee83c4 (diff) | |
| download | linux-681818fdb97de821cc1ee6b81c7a09f3ef8fc96d.tar.xz | |
drm/xe: Include hardware prefetch buffer in batchbuffer allocations
The hardware prefetches several cachelines of data from batchbuffers
before they are parsed. This prefetching only stops when the parser
encounters an MI_BATCH_BUFFER_END instruction (or a nested
MI_BATCH_BUFFER_START), so we must ensure that there is enough padding
at the end of the batchbuffer to prevent the prefetcher from running
past the end of the allocation and potentially faulting.
Bspec: 45717
Link: https://lore.kernel.org/r/20230329173334.4015124-2-matthew.d.roper@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Diffstat (limited to 'scripts/stackdelta')
0 files changed, 0 insertions, 0 deletions