Paul Durrant b7665c6027 xen: handle inbound migration of VMs without ioreq server pages ... 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> Signed-off-by: Stefano Stabellini <sstabellini@kernel.org> Acked-by: Anthony PERARD <anthony.perard@citrix.com> Acked-by: Stefano Stabellini <sstabellini@kernel.org>		2016-08-12 16:38:30 -07:00
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xen.h	Clean up decorations and whitespace around header guards	2016-07-12 16:20:46 +02:00
xen_backend.h	xen: use a common function for pv and hvm guest backend register calls	2016-08-03 14:52:11 +02:00
xen_common.h	xen: handle inbound migration of VMs without ioreq server pages	2016-08-12 16:38:30 -07:00