XSM: make .dm_op() hook dependent upon IOREQ_SERVER=y

It's unreachable / dead otherwise.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Daniel P. Smith <dpsmith@apertussolutions.com>

xen/include/xsm/dummy.h

@@ -739,11 +739,13 @@ static XSM_INLINE int cf_check xsm_pmu_op(
 
 #endif /* CONFIG_X86 */
 
+#ifdef CONFIG_IOREQ_SERVER
 static XSM_INLINE int cf_check xsm_dm_op(XSM_DEFAULT_ARG struct domain *d)
 {
     XSM_ASSERT_ACTION(XSM_DM_PRIV);
     return xsm_default_action(action, current->domain, d);
 }
+#endif
 
 #ifdef CONFIG_ARGO
 static XSM_INLINE int cf_check xsm_argo_enable(const struct domain *d)

xen/include/xsm/hooks.h

@@ -145,7 +145,10 @@ XSM_HOOK(int, ioport_mapping, struct domain *, uint32_t, uint32_t, uint8_t)
 XSM_HOOK(int, pmu_op, struct domain *, unsigned int)
 #endif /* CONFIG_X86 */
 
+#ifdef CONFIG_IOREQ_SERVER
 XSM_HOOK(int, dm_op, struct domain *)
+#endif
+
 XSM_HOOK(int, xen_version, uint32_t)
 XSM_HOOK(int, domain_resource_map, struct domain *)
 

xen/xsm/flask/hooks.c

@@ -1852,10 +1852,12 @@ static int cf_check flask_pmu_op(struct domain *d, unsigned int op)
 }
 #endif /* CONFIG_X86 */
 
+#ifdef CONFIG_IOREQ_SERVER
 static int cf_check flask_dm_op(struct domain *d)
 {
     return current_has_perm(d, SECCLASS_HVM, HVM__DM);
 }
+#endif
 
 static int cf_check flask_xen_version(uint32_t op)
 {