@@ -2713,7 +2713,9 @@ DEF("readconfig", HAS_ARG, QEMU_OPTION_readconfig,
STEXI
@item -readconfig @var{file}
@findex -readconfig
-Read device configuration from @var{file}.
+Read device configuration from @var{file}. This approach is useful when you want to spawn
+QEMU process with many command line options but you don't want to exceed the command line
+character limit.
ETEXI
DEF("writeconfig", HAS_ARG, QEMU_OPTION_writeconfig,
"-writeconfig <file>\n"
@@ -2721,7 +2723,9 @@ DEF("writeconfig", HAS_ARG, QEMU_OPTION_writeconfig,
STEXI
@item -writeconfig @var{file}
@findex -writeconfig
-Write device configuration to @var{file}.
+Write device configuration to @var{file}. The @var{file} can be either filename to save
+command line and device configuration into file or dash @code{-}) character to print the
+output to stdout. This can be later used as input file for @code{-readconfig} option.
ETEXI
DEF("nodefconfig", 0, QEMU_OPTION_nodefconfig,
"-nodefconfig\n"