Commit 435af0b9 authored by Philip Yang's avatar Philip Yang Committed by Alex Deucher
Browse files

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: default avatarPhilip Yang <Philip.Yang@amd.com>
Reviewed-by: default avatarFelix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 9420a034

drivers/gpu/drm/amd/amdkfd/kfd_svm.c

+3 −1
Original line number Diff line number Diff line
@@ -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:

			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) {