diff --git a/drivers/gpu/drm/ttm/ttm_memory.c b/drivers/gpu/drm/ttm/ttm_memory.c
index a1803fbcc898..29855be96be0 100644
--- a/drivers/gpu/drm/ttm/ttm_memory.c
+++ b/drivers/gpu/drm/ttm/ttm_memory.c
@@ -600,3 +600,9 @@ size_t ttm_round_pot(size_t size)
 	return 0;
 }
 EXPORT_SYMBOL(ttm_round_pot);
+
+uint64_t ttm_get_kernel_zone_memory_size(struct ttm_mem_global *glob)
+{
+	return glob->zone_kernel->max_mem;
+}
+EXPORT_SYMBOL(ttm_get_kernel_zone_memory_size);
diff --git a/include/drm/ttm/ttm_memory.h b/include/drm/ttm/ttm_memory.h
index 72dcbe81dd07..c4520890f267 100644
--- a/include/drm/ttm/ttm_memory.h
+++ b/include/drm/ttm/ttm_memory.h
@@ -155,4 +155,5 @@ extern int ttm_mem_global_alloc_page(struct ttm_mem_global *glob,
 extern void ttm_mem_global_free_page(struct ttm_mem_global *glob,
 				     struct page *page);
 extern size_t ttm_round_pot(size_t size);
+extern uint64_t ttm_get_kernel_zone_memory_size(struct ttm_mem_global *glob);
 #endif