[Qemu-devel] Re: [PATCH 2/2] qdev: add command line option to set global defaults for properties.

[Gerd Hoffmann]

On 11/24/09 15:11, Michael S. Tsirkin wrote:
> On Tue, Nov 24, 2009 at 12:06:28PM +0100, Gerd Hoffmann wrote:
> > 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"
>
> Where's this documented?

config file syntax is git-style, the details are not (yet) documented.

Easiest way to get one if you want to play with it is
  "qemu <all-your-vm-options-here> -writeconfig <filename>".

Note that not all command line options are covered.

I've attached a sample to this mail.  Needs a few patches sent to the 
list yesterday and today to actually work though.

> How would one figure out the command lines you give in
> the examples above?

"info qtree" in monitor prints the device names and properties for all 
devices used by the virtual machine.

"info qdm" and '-device ?' list all devices known to qemu.  The device 
properties are not listed there though (one of the items on my todo list).

cheers,
  Gerd

x86-gfx.cfg
Description: Text document