On Wed, Nov 25, 2009 at 01:55:18PM +0100, Gerd Hoffmann wrote: > 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.
So maybe add "use -device ? to get list of all devices" to help text? [...@tuck qemu]$ ~/qemu-git/bin/qemu-system-x86_64 -device ? /home/mst/qemu-git/bin/qemu-system-x86_64: invalid option -- '-device' [...@tuck qemu]$ ~/qemu-git/bin/qemu-system-x86_64 --device ? /home/mst/qemu-git/bin/qemu-system-x86_64: invalid option -- '-device' > The device > properties are not listed there though (one of the items on my todo > list). Yes, and in fact each option should supply a help text explaining what it is. This was not done this way upfront and each day makes it harder to document as new options are added without documentation. > cheers, > Gerd