[Xen-devel] Re: [PATCH 14/15] xen: destroy the VM when shutdown is requested

[Anthony Liguori <anthony@xxxxxxxxxxxxx>]

On 08/12/2010 09:10 AM, stefano.stabellini@xxxxxxxxxxxxx wrote:
> From: Anthony PERARD<anthony.perard@xxxxxxxxxx>
>
> Handle shutdown and reset requests in helper.c.
>
> Signed-off-by: Anthony PERARD<anthony.perard@xxxxxxxxxx>
> Signed-off-by: Stefano Stabellini<stefano.stabellini@xxxxxxxxxxxxx>
> ---
>   target-xen/helper.c |   17 +++++++++++++++++
>   1 files changed, 17 insertions(+), 0 deletions(-)
>
> diff --git a/target-xen/helper.c b/target-xen/helper.c
> index 4571ac0..16e628c 100644
> --- a/target-xen/helper.c
> +++ b/target-xen/helper.c
> @@ -397,6 +397,23 @@ static void cpu_handle_ioreq(void *opaque)
>
>           xen_wmb(); /* Update ioreq contents /then/ update state. */
>
> +        /*
> +         * We do this before we send the response so that the tools
> +         * have the opportunity to pick up on the reset before the
> +         * guest resumes and does a hlt with interrupts disabled which
> +         * causes Xen to powerdown the domain.
> +         */
> +        if (vm_running) {
> +            if (qemu_shutdown_requested_get()) {
> +                fprintf(stderr, "shutdown requested in cpu_handle_ioreq\n");
> +                destroy_hvm_domain();
> +            }
>    
The patches should not introduce fprintfs in expected paths.

Regards,

Anthony Liguori

> +            if (qemu_reset_requested_get()) {
> +                fprintf(stderr, "reset requested in cpu_handle_ioreq.\n");
> +                qemu_system_reset();
> +            }
> +        }
> +
>           req->state = STATE_IORESP_READY;
>           xc_evtchn_notify(xce_handle, ioreq_local_port[send_vcpu]);
>       }
>    
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