xen/acpi: Domain0 acpi parser related platform hypercall

This patches implements the xen_platform_op hypercall, to pass the parsed
ACPI info to hypervisor.

Signed-off-by: Yu Ke <ke.yu@intel.com>
Signed-off-by: Tian Kevin <kevin.tian@intel.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
[v1: Added DEFINE_GUEST.. in appropiate headers]
[v2: Ripped out typedefs]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
diff --git a/include/xen/interface/xen.h b/include/xen/interface/xen.h
index 70213b4..d83cc08 100644
--- a/include/xen/interface/xen.h
+++ b/include/xen/interface/xen.h
@@ -453,6 +453,7 @@
 /* These flags are passed in the 'flags' field of start_info_t. */
 #define SIF_PRIVILEGED    (1<<0)  /* Is the domain privileged? */
 #define SIF_INITDOMAIN    (1<<1)  /* Is this the initial control domain? */
+#define SIF_PM_MASK       (0xFF<<8) /* reserve 1 byte for xen-pm options */
 
 typedef uint64_t cpumap_t;