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drm/amdkfd: Optimize svm range map to GPU with XNACK on

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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 <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Philip Yang
2023-04-24 14:46:16 -04:00
committed by Alex Deucher
parent 9420a03406
commit 435af0b919
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/amd/amdkfd/kfd_svm.c
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@@ -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) {