drm/amdkfd: new range accessible by all GPUs

If xnack is on, new range is created to recover retry vm fault or
created by SVM API calls, set all GPUs have access to the range.
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>

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

@@ -258,6 +258,7 @@ svm_range *svm_range_new(struct svm_range_list *svms, uint64_t start,
 {
 	uint64_t size = last - start + 1;
 	struct svm_range *prange;
+	struct kfd_process *p;
 
 	prange = kzalloc(sizeof(*prange), GFP_KERNEL);
 	if (!prange)
@@ -277,6 +278,11 @@ svm_range *svm_range_new(struct svm_range_list *svms, uint64_t start,
 	prange->validate_timestamp = 0;
 	mutex_init(&prange->migrate_mutex);
 	mutex_init(&prange->lock);
+
+	p = container_of(svms, struct kfd_process, svms);
+	if (p->xnack_enabled)
+		bitmap_fill(prange->bitmap_access, MAX_GPU_INSTANCE);
+
 	svm_range_set_default_attributes(&prange->preferred_loc,
 					 &prange->prefetch_loc,
 					 &prange->granularity, &prange->flags);
@@ -2246,7 +2252,7 @@ svm_range *svm_range_create_unregistered_range(struct amdgpu_device *adev,
 
 	prange = svm_range_new(&p->svms, start, last);
 	if (!prange) {
-		pr_debug("Failed to create prange in address [0x%llx]\\n", addr);
+		pr_debug("Failed to create prange in address [0x%llx]\n", addr);
 		return NULL;
 	}
 	if (kfd_process_gpuid_from_kgd(p, adev, &gpuid, &gpuidx)) {
@@ -2254,9 +2260,7 @@ svm_range *svm_range_create_unregistered_range(struct amdgpu_device *adev,
 		svm_range_free(prange);
 		return NULL;
 	}
-	prange->preferred_loc = gpuid;
-	prange->actual_loc = 0;
-	/* Gurantee prange is migrate it */
+
 	svm_range_add_to_svms(prange);
 	svm_range_add_notifier_locked(mm, prange);