On Tue, Aug 06, 2013 at 11:56:11AM +0200, Markus Armbruster wrote:
Andreas Färber email@example.com writes:
Am 06.08.2013 10:36, schrieb Gleb Natapov:
On Tue, Aug 06, 2013 at 11:33:10AM +0300, Michael S. Tsirkin wrote:
On Tue, Aug 06, 2013 at 10:21:52AM +0300, Gleb Natapov wrote:
If you see a mouse in a room, how likely is it that there's a single mouse there?
This is a PV technology which to me looks like it was rushed through and not only set on by default, but without a way to disable it - apparently on the assumption there's 0 chance it can cause any damage. Now that we do know the chance it's not there, why not go back to the standard interface, and why not give users a chance to enable/disable it?
You should be able to disable it with: -device pvpanic,ioport=0
Doesn't work for me.
Bug that should be fixed. With this command line _STA should return zero.
Besides, both -device pvpanic and use of ioport=0 to disable it are completely undocumented.
Not the only undocumented thing in QEMU command line :)
I disagree: -device adds a device, not removes one. It will still be present.
I am neutral as to whether qemu-system-x86_64 should have it enabled by default or not.
In general, me neither. But we have -device to add a device, it's nicely self-documenting, We don't have -nodevice to remove a device except the big -nodefaults, and -nodefaults is not self-documenting, and it's not clear how it can be made self-documenting.