diff --git a/contrib/ofed/libmlx5/buf.c b/contrib/ofed/libmlx5/buf.c
--- a/contrib/ofed/libmlx5/buf.c
+++ b/contrib/ofed/libmlx5/buf.c
@@ -320,6 +320,36 @@
 		mlx5_spin_unlock(&ctx->hugetlb_lock);
 }
 
+void mlx5_free_buf_extern(struct mlx5_context *ctx, struct mlx5_buf *buf)
+{
+	ibv_dofork_range(buf->buf, buf->length);
+	ctx->extern_alloc.free(buf->buf, ctx->extern_alloc.data);
+}
+
+int mlx5_alloc_buf_extern(struct mlx5_context *ctx, struct mlx5_buf *buf,
+		size_t size)
+{
+	void *addr;
+
+	addr = ctx->extern_alloc.alloc(size, ctx->extern_alloc.data);
+	if (addr || size == 0) {
+		if (ibv_dontfork_range(addr, size)) {
+			mlx5_dbg(stderr, MLX5_DBG_CONTIG,
+					"External mode dontfork_range failed\n");
+			ctx->extern_alloc.free(addr,
+					ctx->extern_alloc.data);
+			return -1;
+		}
+		buf->buf = addr;
+		buf->length = size;
+		buf->type = MLX5_ALLOC_TYPE_EXTERNAL;
+		return 0;
+	}
+
+	mlx5_dbg(stderr, MLX5_DBG_CONTIG, "External alloc failed\n");
+	return -1;
+}
+
 int mlx5_alloc_prefered_buf(struct mlx5_context *mctx,
 			    struct mlx5_buf *buf,
 			    size_t size, int page_size,
@@ -362,6 +392,9 @@
 			 "Contig allocation failed, fallback to default mode\n");
 	}
 
+	if (type == MLX5_ALLOC_TYPE_EXTERNAL)
+		return mlx5_alloc_buf_extern(mctx, buf, size);
+
 	return mlx5_alloc_buf(buf, size, page_size);
 
 }
@@ -382,6 +415,11 @@
 	case MLX5_ALLOC_TYPE_CONTIG:
 		mlx5_free_buf_contig(ctx, buf);
 		break;
+
+	case MLX5_ALLOC_TYPE_EXTERNAL:
+		mlx5_free_buf_extern(ctx, buf);
+		break;
+
 	default:
 		fprintf(stderr, "Bad allocation type\n");
 	}
@@ -414,7 +452,13 @@
 	return r;
 }
 
-void mlx5_get_alloc_type(const char *component,
+bool mlx5_is_extern_alloc(struct mlx5_context *context)
+{
+	return context->extern_alloc.alloc && context->extern_alloc.free;
+}
+
+void mlx5_get_alloc_type(struct mlx5_context *context,
+			 const char *component,
 			 enum mlx5_alloc_type *alloc_type,
 			 enum mlx5_alloc_type default_type)
 
@@ -422,6 +466,11 @@
 	char *env_value;
 	char name[128];
 
+	if (mlx5_is_extern_alloc(context)) {
+		*alloc_type = MLX5_ALLOC_TYPE_EXTERNAL;
+		return;
+	}
+
 	snprintf(name, sizeof(name), "%s_ALLOC_TYPE", component);
 
 	*alloc_type = default_type;
diff --git a/contrib/ofed/libmlx5/cq.c b/contrib/ofed/libmlx5/cq.c
--- a/contrib/ofed/libmlx5/cq.c
+++ b/contrib/ofed/libmlx5/cq.c
@@ -1499,7 +1499,7 @@
 	if (mlx5_use_huge("HUGE_CQ"))
 		default_type = MLX5_ALLOC_TYPE_HUGE;
 
-	mlx5_get_alloc_type(MLX5_CQ_PREFIX, &type, default_type);
+	mlx5_get_alloc_type(mctx, MLX5_CQ_PREFIX, &type, default_type);
 
 	ret = mlx5_alloc_prefered_buf(mctx, buf,
 				      align(nent * cqe_sz, dev->page_size),
diff --git a/contrib/ofed/libmlx5/dbrec.c b/contrib/ofed/libmlx5/dbrec.c
--- a/contrib/ofed/libmlx5/dbrec.c
+++ b/contrib/ofed/libmlx5/dbrec.c
@@ -53,6 +53,7 @@
 	int pp;
 	int i;
 	int nlong;
+	int ret;
 
 	pp = ps / context->cache_line_size;
 	nlong = (pp + 8 * sizeof(long) - 1) / (8 * sizeof(long));
@@ -61,7 +62,11 @@
 	if (!page)
 		return NULL;
 
-	if (mlx5_alloc_buf(&page->buf, ps, ps)) {
+	if (mlx5_is_extern_alloc(context))
+		ret = mlx5_alloc_buf_extern(context, &page->buf, ps);
+	else
+		ret = mlx5_alloc_buf(&page->buf, ps, ps);
+	if (ret) {
 		free(page);
 		return NULL;
 	}
@@ -139,7 +144,11 @@
 		if (page->next)
 			page->next->prev = page->prev;
 
-		mlx5_free_buf(&page->buf);
+		if (page->buf.type == MLX5_ALLOC_TYPE_EXTERNAL)
+			mlx5_free_buf_extern(context, &page->buf);
+		else
+			mlx5_free_buf(&page->buf);
+
 		free(page);
 	}
 
diff --git a/contrib/ofed/libmlx5/libmlx5.map b/contrib/ofed/libmlx5/libmlx5.map
--- a/contrib/ofed/libmlx5/libmlx5.map
+++ b/contrib/ofed/libmlx5/libmlx5.map
@@ -14,4 +14,5 @@
 MLX5_1.2 {
 	global:
 		mlx5dv_init_obj;
+		mlx5dv_set_context_attr;
 } MLX5_1.1;
diff --git a/contrib/ofed/libmlx5/mlx5.h b/contrib/ofed/libmlx5/mlx5.h
--- a/contrib/ofed/libmlx5/mlx5.h
+++ b/contrib/ofed/libmlx5/mlx5.h
@@ -162,6 +162,7 @@
 	MLX5_ALLOC_TYPE_CONTIG,
 	MLX5_ALLOC_TYPE_PREFER_HUGE,
 	MLX5_ALLOC_TYPE_PREFER_CONTIG,
+	MLX5_ALLOC_TYPE_EXTERNAL,
 	MLX5_ALLOC_TYPE_ALL
 };
 
@@ -268,6 +269,7 @@
 	uint32_t			uar_size;
 	uint64_t			vendor_cap_flags; /* Use enum mlx5_vendor_cap_flags */
 	struct mlx5dv_cqe_comp_caps	cqe_comp_caps;
+	struct mlx5dv_ctx_allocators	extern_alloc;
 };
 
 struct mlx5_bitmap {
@@ -558,10 +560,15 @@
 			    enum mlx5_alloc_type alloc_type,
 			    const char *component);
 int mlx5_free_actual_buf(struct mlx5_context *ctx, struct mlx5_buf *buf);
-void mlx5_get_alloc_type(const char *component,
+void mlx5_get_alloc_type(struct mlx5_context *context,
+			 const char *component,
 			 enum mlx5_alloc_type *alloc_type,
 			 enum mlx5_alloc_type default_alloc_type);
 int mlx5_use_huge(const char *key);
+bool mlx5_is_extern_alloc(struct mlx5_context *context);
+int mlx5_alloc_buf_extern(struct mlx5_context *ctx, struct mlx5_buf *buf,
+		size_t size);
+void mlx5_free_buf_extern(struct mlx5_context *ctx, struct mlx5_buf *buf);
 
 __be32 *mlx5_alloc_dbrec(struct mlx5_context *context);
 void mlx5_free_db(struct mlx5_context *context, __be32 *db);
diff --git a/contrib/ofed/libmlx5/mlx5.c b/contrib/ofed/libmlx5/mlx5.c
--- a/contrib/ofed/libmlx5/mlx5.c
+++ b/contrib/ofed/libmlx5/mlx5.c
@@ -736,6 +736,22 @@
 	return ret;
 }
 
+int mlx5dv_set_context_attr(struct ibv_context *ibv_ctx,
+		enum mlx5dv_set_ctx_attr_type type, void *attr)
+{
+	struct mlx5_context *ctx = to_mctx(ibv_ctx);
+
+	switch (type) {
+	case MLX5DV_CTX_ATTR_BUF_ALLOCATORS:
+		ctx->extern_alloc = *((struct mlx5dv_ctx_allocators *)attr);
+		break;
+	default:
+		return ENOTSUP;
+	}
+
+	return 0;
+}
+
 static void adjust_uar_info(struct mlx5_device *mdev,
 			    struct mlx5_context *context,
 			    struct mlx5_alloc_ucontext_resp resp)
diff --git a/contrib/ofed/libmlx5/mlx5dv.h b/contrib/ofed/libmlx5/mlx5dv.h
--- a/contrib/ofed/libmlx5/mlx5dv.h
+++ b/contrib/ofed/libmlx5/mlx5dv.h
@@ -620,4 +620,24 @@
 	seg->inline_hdr_sz	= htobe16(inline_hdr_sz);
 	memcpy(seg->inline_hdr_start, inline_hdr_start, inline_hdr_sz);
 }
+
+enum mlx5dv_set_ctx_attr_type {
+	MLX5DV_CTX_ATTR_BUF_ALLOCATORS = 1,
+};
+
+struct mlx5dv_ctx_allocators {
+	void *(*alloc)(size_t size, void *priv_data);
+	void (*free)(void *ptr, void *priv_data);
+	void *data;
+};
+
+/*
+ * Generic context attributes set API
+ *
+ * Returns 0 on success, or the value of errno on failure
+ * (which indicates the failure reason).
+ */
+int mlx5dv_set_context_attr(struct ibv_context *context,
+		enum mlx5dv_set_ctx_attr_type type, void *attr);
+
 #endif /* _MLX5DV_H_ */
diff --git a/contrib/ofed/libmlx5/verbs.c b/contrib/ofed/libmlx5/verbs.c
--- a/contrib/ofed/libmlx5/verbs.c
+++ b/contrib/ofed/libmlx5/verbs.c
@@ -1077,7 +1077,7 @@
 	if (mlx5_use_huge(qp_huge_key))
 		default_alloc_type = MLX5_ALLOC_TYPE_HUGE;
 
-	mlx5_get_alloc_type(MLX5_QP_PREFIX, &alloc_type,
+	mlx5_get_alloc_type(to_mctx(context), MLX5_QP_PREFIX, &alloc_type,
 			    default_alloc_type);
 
 	err = mlx5_alloc_prefered_buf(to_mctx(context), &qp->buf,
@@ -2002,7 +2002,10 @@
 			      int size)
 {
 	int err;
-	enum mlx5_alloc_type default_alloc_type = MLX5_ALLOC_TYPE_PREFER_CONTIG;
+	enum mlx5_alloc_type alloc_type;
+
+	mlx5_get_alloc_type(to_mctx(context), MLX5_RWQ_PREFIX,
+			    &alloc_type, MLX5_ALLOC_TYPE_ANON);
 
 	rwq->rq.wrid = malloc(rwq->rq.wqe_cnt * sizeof(uint64_t));
 	if (!rwq->rq.wrid) {
@@ -2014,7 +2017,7 @@
 				      align(rwq->buf_size, to_mdev
 				      (context->device)->page_size),
 				      to_mdev(context->device)->page_size,
-				      default_alloc_type,
+				      alloc_type,
 				      MLX5_RWQ_PREFIX);
 
 	if (err) {