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-rw-r--r--qemu-options.hx4
1 files changed, 4 insertions, 0 deletions
diff --git a/qemu-options.hx b/qemu-options.hx
index 5fe8ea57d2..68f2c09b00 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -4086,9 +4086,13 @@ DEF("fw_cfg", HAS_ARG, QEMU_OPTION_fwcfg,
 SRST
 ``-fw_cfg [name=]name,file=file``
     Add named fw\_cfg entry with contents from file file.
+    If the filename contains comma, you must double it (for instance,
+    "file=my,,file" to use file "my,file").
 
 ``-fw_cfg [name=]name,string=str``
     Add named fw\_cfg entry with contents from string str.
+    If the string contains comma, you must double it (for instance,
+    "string=my,,string" to use file "my,string").
 
     The terminating NUL character of the contents of str will not be
     included as part of the fw\_cfg item data. To insert contents with