From 5d14fdab4778c29cfd39e62c3ce84d232b4a7d8c Mon Sep 17 00:00:00 2001 From: David Yat Sin Date: Thu, 19 Jun 2025 17:51:13 +0000 Subject: [PATCH] amdkfd: MTYPE_UC for ext-coherent system memory 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 Signed-off-by: David Yat Sin Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index 865dca2547de5..7763e4742080b 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -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; -- 2.47.2