pvh dom0: make xsm_map_gmfn_foreign available for x86

In this patch we make xsm_map_gmfn_foreign available for x86 also. This
is used in the next patch "pvh dom0: Add and remove foreign pages" in
function p2m_add_foreign.

Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
Acked-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>

xen/include/xsm/dummy.h

@@ -477,6 +477,12 @@ static XSM_INLINE int xsm_remove_from_physmap(XSM_DEFAULT_ARG struct domain *d1,
     return xsm_default_action(action, d1, d2);
 }
 
+static XSM_INLINE int xsm_map_gmfn_foreign(XSM_DEFAULT_ARG struct domain *d, struct domain *t)
+{
+    XSM_ASSERT_ACTION(XSM_TARGET);
+    return xsm_default_action(action, d, t);
+}
+
 static XSM_INLINE int xsm_hvm_param(XSM_DEFAULT_ARG struct domain *d, unsigned long op)
 {
     XSM_ASSERT_ACTION(XSM_TARGET);
@@ -624,11 +630,3 @@ static XSM_INLINE int xsm_ioport_mapping(XSM_DEFAULT_ARG struct domain *d, uint3
 }
 
 #endif /* CONFIG_X86 */
-
-#ifdef CONFIG_ARM
-static XSM_INLINE int xsm_map_gmfn_foreign(XSM_DEFAULT_ARG struct domain *d, struct domain *t)
-{
-    XSM_ASSERT_ACTION(XSM_TARGET);
-    return xsm_default_action(action, d, t);
-}
-#endif

xen/include/xsm/xsm.h

@@ -91,6 +91,7 @@ struct xsm_operations {
     int (*memory_pin_page) (struct domain *d1, struct domain *d2, struct page_info *page);
     int (*add_to_physmap) (struct domain *d1, struct domain *d2);
     int (*remove_from_physmap) (struct domain *d1, struct domain *d2);
+    int (*map_gmfn_foreign) (struct domain *d, struct domain *t);
     int (*claim_pages) (struct domain *d);
 
     int (*console_io) (struct domain *d, int cmd);
@@ -166,9 +167,6 @@ struct xsm_operations {
     int (*ioport_permission) (struct domain *d, uint32_t s, uint32_t e, uint8_t allow);
     int (*ioport_mapping) (struct domain *d, uint32_t s, uint32_t e, uint8_t allow);
 #endif
-#ifdef CONFIG_ARM
-    int (*map_gmfn_foreign) (struct domain *d, struct domain *t);
-#endif
 };
 
 #ifdef XSM_ENABLE
@@ -354,6 +352,11 @@ static inline int xsm_remove_from_physmap(xsm_default_t def, struct domain *d1,
     return xsm_ops->remove_from_physmap(d1, d2);
 }
 
+static inline int xsm_map_gmfn_foreign (xsm_default_t def, struct domain *d, struct domain *t)
+{
+    return xsm_ops->map_gmfn_foreign(d, t);
+}
+
 static inline int xsm_claim_pages(xsm_default_t def, struct domain *d)
 {
     return xsm_ops->claim_pages(d);
@@ -634,13 +637,6 @@ static inline int xsm_ioport_mapping (xsm_default_t def, struct domain *d, uint3
 }
 #endif /* CONFIG_X86 */
 
-#ifdef CONFIG_ARM
-static inline int xsm_map_gmfn_foreign (xsm_default_t def, struct domain *d, struct domain *t)
-{
-    return xsm_ops->map_gmfn_foreign(d, t);
-}
-#endif /* CONFIG_ARM */
-
 #endif /* XSM_NO_WRAPPERS */
 
 #ifdef CONFIG_MULTIBOOT

xen/xsm/dummy.c

@@ -112,6 +112,7 @@ void xsm_fixup_ops (struct xsm_operations *ops)
 
     set_to_dummy_if_null(ops, add_to_physmap);
     set_to_dummy_if_null(ops, remove_from_physmap);
+    set_to_dummy_if_null(ops, map_gmfn_foreign);
 
 #ifdef CONFIG_X86
     set_to_dummy_if_null(ops, do_mca);
@@ -136,7 +137,4 @@ void xsm_fixup_ops (struct xsm_operations *ops)
     set_to_dummy_if_null(ops, ioport_permission);
     set_to_dummy_if_null(ops, ioport_mapping);
 #endif
-#ifdef CONFIG_ARM
-    set_to_dummy_if_null(ops, map_gmfn_foreign);
-#endif
 }

xen/xsm/flask/hooks.c

@@ -1078,6 +1078,11 @@ static int flask_remove_from_physmap(struct domain *d1, struct domain *d2)
     return domain_has_perm(d1, d2, SECCLASS_MMU, MMU__PHYSMAP);
 }
 
+static int flask_map_gmfn_foreign(struct domain *d, struct domain *t)
+{
+    return domain_has_perm(d, t, SECCLASS_MMU, MMU__MAP_READ | MMU__MAP_WRITE);
+}
+
 static int flask_hvm_param(struct domain *d, unsigned long op)
 {
     u32 perm;
@@ -1460,13 +1465,6 @@ static int flask_unbind_pt_irq (struct domain *d, struct xen_domctl_bind_pt_irq
 }
 #endif /* CONFIG_X86 */
 
-#ifdef CONFIG_ARM
-static int flask_map_gmfn_foreign(struct domain *d, struct domain *t)
-{
-    return domain_has_perm(d, t, SECCLASS_MMU, MMU__MAP_READ | MMU__MAP_WRITE);
-}
-#endif
-
 long do_flask_op(XEN_GUEST_HANDLE_PARAM(xsm_op_t) u_flask_op);
 int compat_flask_op(XEN_GUEST_HANDLE_PARAM(xsm_op_t) u_flask_op);
 
@@ -1548,7 +1546,7 @@ static struct xsm_operations flask_ops = {
 
     .add_to_physmap = flask_add_to_physmap,
     .remove_from_physmap = flask_remove_from_physmap,
-
+    .map_gmfn_foreign = flask_map_gmfn_foreign,
 
 #if defined(HAS_PASSTHROUGH) && defined(HAS_PCI)
     .get_device_group = flask_get_device_group,
@@ -1580,10 +1578,6 @@ static struct xsm_operations flask_ops = {
     .ioport_permission = flask_ioport_permission,
     .ioport_mapping = flask_ioport_mapping,
 #endif
-
-#ifdef CONFIG_ARM
-    .map_gmfn_foreign = flask_map_gmfn_foreign,
-#endif
 };
 
 static __init int flask_init(void)