Re: [Qemu-devel] [PATCH v14 3/4] introduce pvevent device to deal with panicked event

[Hu Tao]

On Thu, Mar 14, 2013 at 10:14:12AM +0100, Paolo Bonzini wrote:
> Il 14/03/2013 09:15, Hu Tao ha scritto:
> > pvevent device is used to send guest panic event from guest to qemu.
> > 
> > When guest panic happens, pvevent device driver will write a event
> > number to IO port 0x505(which is the IO port occupied by pvevent device,
> > by default). On receiving the event, pvevent device will pause guest
> > cpu(s), and send a qmp event QEVENT_GUEST_PANICKED.  
> > 
> > TODO: make the IO port configurable
> 
> The port is already configurable as far as the device is concerned; when
> you add the port to the PC boards you will have to wind up fw-cfg.

Yes, by configurable, I mean to pass io port through fw-cfg to seabios
and patch it.