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qdev: add command line option to set global defaults for properties.

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This patch adds infrastructure and command line option for setting
global defaults for device properties, i.e. you can for example use

  -global virtio-blk-pci.vectors=0

to turn off msi by default for all virtio block devices.  The config
file syntax is:

[global]
  driver = "virtio-blk-pci"
  property = "vectors"
  value = "0"

This can also be used to set properties for devices which are not
created via -device but implicitly via machine init, i.e.

  -global isa-fdc,driveA=<name>

This patch uses the mechanism which configures properties for the
compatibility machine types (pc-0.10 & friends).  The command line
takes precedence over the machine type values.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Gerd Hoffmann 2009-12-08 13:11:34 +01:00 • committed by Anthony Liguori
parent 458fb6792d
commit d0fef6fbea
4 changed files with 67 additions and 0 deletions
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2
qemu-config.h
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@ -9,6 +9,8 @@ extern QemuOptsList qemu_net_opts;
extern QemuOptsList qemu_rtc_opts;
int qemu_set_option(const char *str);
int qemu_global_option(const char *str);
void qemu_add_globals(void);
void qemu_config_write(FILE *fp);
int qemu_config_parse(FILE *fp);