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vl: allow full-blown QemuOpts syntax for -global

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-global does not work for drivers that have a dot in their name, such as
cfi.pflash01.  This is just a parsing limitation, because such globals
can be declared easily inside a -readconfig file.

To allow this usage, support the full QemuOpts key/value syntax for -global
too, for example "-global driver=cfi.pflash01,property=secure,value=on".
The two formats do not conflict, because the key/value syntax does not have
a period before the first equal sign.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-04-09 14:16:19 +02:00
parent f71e42a5c9
commit 3751d7c43f
2 changed files with 17 additions and 8 deletions
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18
qdev-monitor.c
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@ -822,15 +822,19 @@ int qemu_global_option(const char *str)
QemuOpts *opts;
int rc, offset;
rc = sscanf(str, "%63[^.].%63[^=]%n", driver, property, &offset);
if (rc < 2 || str[offset] != '=') {
error_report("can't parse: \"%s\"", str);
rc = sscanf(str, "%63[^.=].%63[^=]%n", driver, property, &offset);
if (rc == 2 && str[offset] == '=') {
opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
qemu_opt_set(opts, "driver", driver, &error_abort);
qemu_opt_set(opts, "property", property, &error_abort);
qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
return 0;
}
opts = qemu_opts_parse(&qemu_global_opts, str, false);
if (!opts) {
return -1;
}
opts = qemu_opts_create(&qemu_global_opts, NULL, 0, &error_abort);
qemu_opt_set(opts, "driver", driver, &error_abort);
qemu_opt_set(opts, "property", property, &error_abort);
qemu_opt_set(opts, "value", str + offset + 1, &error_abort);
return 0;
}

7
qemu-options.hx
View file

@ -171,11 +171,13 @@ Set parameter @var{arg} for item @var{id} of type @var{group}\n"
ETEXI
DEF("global", HAS_ARG, QEMU_OPTION_global,
"-global driver.prop=value\n"
"-global driver.property=value\n"
"-global driver=driver,property=property,value=value\n"
" set a global default for a driver property\n",
QEMU_ARCH_ALL)
STEXI
@item -global @var{driver}.@var{prop}=@var{value}
@itemx -global driver=@var{driver},property=@var{property},value=@var{value}
@findex -global
Set default value of @var{driver}'s property @var{prop} to @var{value}, e.g.:
@ -186,6 +188,9 @@ qemu-system-i386 -global ide-drive.physical_block_size=4096 -drive file=file,if=
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.
ETEXI
DEF("boot", HAS_ARG, QEMU_OPTION_boot,