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Diffstat (limited to 'docs/specs/fw_cfg.txt')
| -rw-r--r-- | docs/specs/fw_cfg.txt | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/docs/specs/fw_cfg.txt b/docs/specs/fw_cfg.txt index 74351dd18f..c0e76aaee9 100644 --- a/docs/specs/fw_cfg.txt +++ b/docs/specs/fw_cfg.txt @@ -216,6 +216,21 @@ the following syntax: where <item_name> is the fw_cfg item name, and <path> is the location on the host file system of a file containing the data to be inserted. +Small enough items may be provided directly as strings on the command +line, using the syntax: + + -fw_cfg [name=]<item_name>,string=<string> + +The terminating NUL character of the content <string> will NOT be +included as part of the fw_cfg item data, which is consistent with +the absence of a NUL terminator for items inserted via the file option. + +Both <item_name> and, if applicable, the content <string> are passed +through by QEMU without any interpretation, expansion, or further +processing. Any such processing (potentially performed e.g., by the shell) +is outside of QEMU's responsibility; as such, using plain ASCII characters +is recommended. + NOTE: Users *SHOULD* choose item names beginning with the prefix "opt/" when using the "-fw_cfg" command line option, to avoid conflicting with item names used internally by QEMU. For instance: |