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| author | Philip Yang <Philip.Yang@amd.com> | 2025-11-20 16:43:04 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-01-20 17:15:46 -0500 |
| commit | d4a814f400d4f3bd1e52f9b82e7d1f11b2721cf8 (patch) | |
| tree | eadc1b0fba32649b077215fe79db6b44db8eb0fd /drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c | |
| parent | d62dec8c70934c428f80889c49e09a9d1d93c126 (diff) | |
| download | linux-next-d4a814f400d4f3bd1e52f9b82e7d1f11b2721cf8.tar.gz linux-next-d4a814f400d4f3bd1e52f9b82e7d1f11b2721cf8.zip | |
drm/amdkfd: Move gfx9.4.3 and gfx 9.5 MQD to HBM
To reduce queue switch latency further, move MQD to VRAM domain, CP
access MQD and control stack via FB aperture, this requires contiguous
pages.
After MQD is initialized, updated or restored, flush HDP to guarantee
the data is written to HBM and GPU cache is invalidated, then CP will
read the new MQD.
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c index 15770e9a7e63..877d0df50376 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c @@ -334,7 +334,8 @@ int amdgpu_amdkfd_alloc_kernel_mem(struct amdgpu_device *adev, size_t size, bp.size = size; bp.byte_align = PAGE_SIZE; bp.domain = domain; - bp.flags = AMDGPU_GEM_CREATE_CPU_GTT_USWC; + bp.flags = AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS | + AMDGPU_GEM_CREATE_CPU_GTT_USWC; bp.type = ttm_bo_type_kernel; bp.resv = NULL; bp.bo_ptr_size = sizeof(struct amdgpu_bo); |