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| author | Philippe Mathieu-Daudé <philmd@redhat.com> | 2020-05-14 15:15:38 +0200 |
|---|---|---|
| committer | Philippe Mathieu-Daudé <philmd@redhat.com> | 2020-07-03 18:16:01 +0200 |
| commit | 3203148917d035b09f71986ac2eaa19a352d6d9d (patch) | |
| tree | 99655b5eb28e3ae47c15dfa13409791ccdc0097f /docs | |
| parent | 993aec27aa39aa90f89f227d8f82cc1f8062386e (diff) | |
| download | qemu-3203148917d035b09f71986ac2eaa19a352d6d9d.zip qemu-3203148917d035b09f71986ac2eaa19a352d6d9d.tar.gz qemu-3203148917d035b09f71986ac2eaa19a352d6d9d.tar.bz2 | |
hw/nvram/fw_cfg: Add the FW_CFG_DATA_GENERATOR interface
The FW_CFG_DATA_GENERATOR allows any object to produce
blob of data consumable by the fw_cfg device.
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20200623172726.21040-3-philmd@redhat.com>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/specs/fw_cfg.txt | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/docs/specs/fw_cfg.txt b/docs/specs/fw_cfg.txt index 8f1ebc6..bc16daa 100644 --- a/docs/specs/fw_cfg.txt +++ b/docs/specs/fw_cfg.txt @@ -219,7 +219,7 @@ To check the result, read the "control" field: = Externally Provided Items = -As of v2.4, "file" fw_cfg items (i.e., items with selector keys above +Since v2.4, "file" fw_cfg items (i.e., items with selector keys above FW_CFG_FILE_FIRST, and with a corresponding entry in the fw_cfg file directory structure) may be inserted via the QEMU command line, using the following syntax: @@ -230,6 +230,13 @@ Or -fw_cfg [name=]<item_name>,string=<string> +Since v5.1, QEMU allows some objects to generate fw_cfg-specific content, +the content is then associated with a "file" item using the 'gen_id' option +in the command line, using the following syntax: + + -object <generator-type>,id=<generated_id>,[generator-specific-options] \ + -fw_cfg [name=]<item_name>,gen_id=<generated_id> + See QEMU man page for more documentation. Using item_name with plain ASCII characters only is recommended. |