Re: [Qemu-devel] [PATCH] xen: handle inbound migration of VMs without ioreq server pages

[Anthony PERARD <anthony.perard@citrix.com>]

On Mon, Aug 01, 2016 at 10:16:25AM +0100, Paul Durrant wrote:
> VMs created on older versions on Xen will not have been provisioned with
> pages to support creation of non-default ioreq servers. In this case
> the ioreq server API is not supported and QEMU's only option is to fall
> back to using the default ioreq server pages as it did prior to
> commit 3996e85c ("Xen: Use the ioreq-server API when available").
> 
> This patch therefore changes the code in xen_common.h to stop considering
> a failure of xc_hvm_create_ioreq_server() as a hard failure but simply
> as an indication that the guest is too old to support the ioreq server
> API. Instead a boolean is set to cause reversion to old behaviour such
> that the default ioreq server is then used.
> 
> Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
> Cc: Stefano Stabellini <sstabellini@kernel.org>
> Cc: Anthony Perard <anthony.perard@citrix.com>

There are just two lines too long:

WARNING: line over 80 characters
#31: FILE: include/hw/xen/xen_common.h:110:
+static inline int xen_get_default_ioreq_server_info(xc_interface *xc, domid_t dom,

WARNING: line over 80 characters
#34: FILE: include/hw/xen/xen_common.h:113:
+                                                    evtchn_port_t *bufioreq_evtchn)

With that fixed: Acked-by: Anthony PERARD <anthony.perard@citrix.com>

Thanks,

-- 
Anthony PERARD