Re: [PATCH] xen/pvhvm: add soft reset on kexec/kdump support

[Boris Ostrovsky]

On 09/25/2015 03:01 PM, Konrad Rzeszutek Wilk wrote:
> On Fri, Sep 25, 2015 at 01:17:40PM -0400, Boris Ostrovsky wrote:
> > On 09/25/2015 12:07 PM, Vitaly Kuznetsov wrote:
> > > > Also, I am not sure I see how this new op will be used in the
> > > > hypervisor --- currently AFAICS it is only processed under
> > > > is_hardware_domain(). Are there other patches that will support HVM
> > > > guests?
> > > Please see my Xen series:
> > > http://lists.xenproject.org/archives/html/xen-devel/2015-09/msg00547.html
> > > (last 'full' submission).
> > >
> > > All patches from my 'toolstack-assisted approach to PVHVM guest kexec'
> > > are already merged to xen.git (first 10 are already in 'master' and the
> > > last one is in 'staging').
> >
> > OK, so I was looking at the right tree. Then I don't understand how
> > SHUTDOWN_soft_reset would be reached for a non-privileged domain. The only
> > path that I see is
> >
> >      domain_shutdown()
> >      {
> >          ...
> >          if ( is_hardware_domain(d) )
> >              hwdom_shutdown(reason);
> >          ...
> >      }
> >
> > Is there another path to handle this op?
> Yes:
>   e1bd9812966de9a16f30a58e7162b80bd6af361b libxc: support XEN_DOMCTL_soft_reset operation
> and
>   c57e6ebd8c3e490e353e68d96abec1dad01e72f5 (lib)xl: soft reset support


That's toolstack issuing hypercalls from dom0.

I am asking about (non-privileged) guest itself calling SCHEDOP_shutdown.

-boris
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/