--- zzzz-none-000/linux-5.15.111/drivers/firmware/efi/libstub/efi-stub-helper.c	2023-05-11 14:00:40.000000000 +0000
+++ puma7-atom-6670-761/linux-5.15.111/drivers/firmware/efi/libstub/efi-stub-helper.c	2024-02-07 10:22:41.000000000 +0000
@@ -702,3 +702,38 @@
 
 	return status;
 }
+
+efi_status_t avm_for_each_protocol_call(efi_guid_t *protocol_guid,
+					efi_status_t (*callback)(void *iface, void *arg),
+					void *arg)
+{
+	unsigned long nhandles, i;
+	efi_handle_t *handles;
+	efi_status_t status;
+
+	status = efi_bs_call(locate_handle_buffer, EFI_LOCATE_BY_PROTOCOL,
+			     protocol_guid, NULL, &nhandles, &handles);
+	if (status != EFI_SUCCESS) {
+		efi_err("[%s] locate_handle_buffer failed:(%lu)\n", __func__, status);
+		return status;
+	}
+
+	for (i = 0; i < nhandles; ++i) {
+		efi_handle_t handle;
+		void *iface;
+
+		handle = efi_get_handle_at(handles, i);
+		status = efi_bs_call(handle_protocol, handle, protocol_guid, &iface);
+		if (status != EFI_SUCCESS) {
+			efi_err("[%s] Failed to handle PCI protocol: %lu\n", __func__, status);
+			continue;
+		}
+
+		status = callback(iface, arg);
+		if (status == EFI_AVM_LOOP_STOP)
+			break;
+	}
+
+	efi_bs_call(free_pool, handles);
+	return status;
+}