Re: Exception handling between QEMU and KVM

[Avi Kivity <avi-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>]

On 07/01/2009 04:59 PM, Christoffer Dall wrote:
> OK, my question is this:
>
> If I want to tell QEMU to quit from within the KVM_RUN ioctl in a way
> that causes QEMU to exit gracefully (e.g. free any allocated memory
> etc.) what is the way to do that?
>    

Have KVM_RUN return -ESOMETHING, qemu should abort when it sees that.

> I have tried setting EXIT_REASON to both KVM_EXIT_EXCEPTION and
> KVM_EXIT_SHUTDOWN, but QEMU stays in the execution loop and
> re-executes the machine over and over.
>
> Is this some logic that has to be done architecture specifically in
> kvm_arch_post_run(...) or ?
>    

I don't remember exactly.  It also depends on what version of the source 
you're looking at.

> And yes, any exceptions should be handled in KVM, but in the case of
> an unrecoverable error I'm left with reporting this to the user and
> end the QEMU process, right?
>    

Yes.  Current sources pause the vm so you can inspect guest state via 
the monitor.

-- 
error compiling committee.c: too many arguments to function

--
To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html