From 435af0b919bf9eb78f4e05e8596ebed9ca7885b7 Mon Sep 17 00:00:00 2001 From: Philip Yang Date: Mon, 24 Apr 2023 14:46:16 -0400 Subject: [PATCH] drm/amdkfd: Optimize svm range map to GPU with XNACK on With XNACK on if svm_range_set_attr set the range access or access_in_place attribute, we don't call svm_range_validate_and_map to update GPU mapping. This avoids prefaulting the range pages on system memory if the range is not prefetch to VRAM and not mapped to GPUs. Signed-off-by: Philip Yang Reviewed-by: Felix Kuehling Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdkfd/kfd_svm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c index 96a138a39515..c02430537e9c 100644 --- a/drivers/gpu/drm/amd/amdkfd/kfd_svm.c +++ b/drivers/gpu/drm/amd/amdkfd/kfd_svm.c @@ -735,7 +735,9 @@ svm_range_apply_attrs(struct kfd_process *p, struct svm_range *prange, case KFD_IOCTL_SVM_ATTR_ACCESS: case KFD_IOCTL_SVM_ATTR_ACCESS_IN_PLACE: case KFD_IOCTL_SVM_ATTR_NO_ACCESS: - *update_mapping = true; + if (!p->xnack_enabled) + *update_mapping = true; + gpuidx = kfd_process_gpuidx_from_gpuid(p, attrs[i].value); if (attrs[i].type == KFD_IOCTL_SVM_ATTR_NO_ACCESS) { -- 2.34.1