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| author | Rob Clark <[email protected]> | 2025-06-29 20:13:01 +0000 |
|---|---|---|
| committer | Rob Clark <[email protected]> | 2025-07-05 00:48:35 +0000 |
| commit | dbbde63c9e9d472743a88f975baac412ba93f29d (patch) | |
| tree | 6f79b6693e7a8d306dc3443315a55823d6f9bc3b /drivers/gpu/drm/msm/msm_gem.c | |
| parent | drm/msm: Add mmu support for non-zero offset (diff) | |
| download | kernel-dbbde63c9e9d472743a88f975baac412ba93f29d.tar.gz kernel-dbbde63c9e9d472743a88f975baac412ba93f29d.zip | |
drm/msm: Add PRR support
Add PRR (Partial Resident Region) is a bypass address which make GPU
writes go to /dev/null and reads return zero. This is used to implement
vulkan sparse residency.
To support PRR/NULL mappings, we allocate a page to reserve a physical
address which we know will not be used as part of a GEM object, and
configure the SMMU to use this address for PRR/NULL mappings.
Signed-off-by: Rob Clark <[email protected]>
Signed-off-by: Rob Clark <[email protected]>
Tested-by: Antonino Maniscalco <[email protected]>
Reviewed-by: Antonino Maniscalco <[email protected]>
Patchwork: https://patchwork.freedesktop.org/patch/661486/
Diffstat (limited to 'drivers/gpu/drm/msm/msm_gem.c')
0 files changed, 0 insertions, 0 deletions