--- zzzz-none-000/linux-3.10.107/include/xen/xen.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/include/xen/xen.h	2021-02-04 17:41:59.000000000 +0000
@@ -29,4 +29,18 @@
 #define xen_initial_domain()	(0)
 #endif	/* CONFIG_XEN_DOM0 */
 
+#ifdef CONFIG_XEN_PVH
+/* This functionality exists only for x86. The XEN_PVHVM support exists
+ * only in x86 world - hence on ARM it will be always disabled.
+ * N.B. ARM guests are neither PV nor HVM nor PVHVM.
+ * It's a bit like PVH but is different also (it's further towards the H
+ * end of the spectrum than even PVH).
+ */
+#include <xen/features.h>
+#define xen_pvh_domain() (xen_pv_domain() && \
+			  xen_feature(XENFEAT_auto_translated_physmap) && \
+			  xen_have_vector_callback)
+#else
+#define xen_pvh_domain()	(0)
+#endif
 #endif	/* _XEN_XEN_H */