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amdkfd: MTYPE_UC for ext-coherent system memory

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Set memory mtype to UC host memory when ext-coherent
flag is set and memory is registered as a SVM allocation.

Reviewed-by: Amber Lin <Amber.Lin@amd.com>
Signed-off-by: David Yat Sin <David.YatSin@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 5d14fdab47)
This commit is contained in:
David Yat Sin
2025-06-19 17:51:13 +00:00
committed by Alex Deucher
parent 905967e359
commit 62461367f4
1 changed files with 1 additions and 1 deletions
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drivers/gpu/drm/amd/amdkfd/kfd_svm.c
+1 -1
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@@ -1278,7 +1278,7 @@ svm_range_get_pte_flags(struct kfd_node *node,
mapping_flags |= ext_coherent ? AMDGPU_VM_MTYPE_UC : AMDGPU_VM_MTYPE_NC;
/* system memory accessed by the dGPU */
} else {
if (gc_ip_version < IP_VERSION(9, 5, 0))
if (gc_ip_version < IP_VERSION(9, 5, 0) || ext_coherent)
mapping_flags |= AMDGPU_VM_MTYPE_UC;
else
mapping_flags |= AMDGPU_VM_MTYPE_NC;