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qemu-options: Improve -global documentation 

Recent commit 3751d7c "vl: allow full-blown QemuOpts syntax for
-global" overloaded its existing argument syntax DRIVER.PROP=VALUE
with QemuOpts syntax.  Unambigious as long as no DRIVER contains '='.

Its documentation claims that "the two syntaxes are equivalent."
Improve it to spell out how exactly the old syntax gets desugared into
the new one.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Markus Armbruster 2015-06-15 14:35:58 +02:00 committed by Michael Tokarev
parent 6b932c0a5f
commit ae08fd5a36
1 changed files with 3 additions and 2 deletions
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5
qemu-options.hx
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@ -189,8 +189,9 @@ In particular, you can use this to set driver properties for devices which are
created automatically by the machine model. To create a device which is not
created automatically and set properties on it, use -@option{device}.
The two syntaxes are equivalent. The longer one works for drivers whose name
contains a dot.
-global @var{driver}.@var{prop}=@var{value} is shorthand for -global
driver=@var{driver},property=@var{prop},value=@var{value}. The
longhand syntax works even when @var{driver} contains a dot.
ETEXI
DEF("boot", HAS_ARG, QEMU_OPTION_boot,