[PATCH v4 09/11] silo: remove circular xsm hook call

["Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>]

SILO implements a few XSM hooks to extended the decision logic beyond
what is defined in the dummy/default policy. For each of the hooks, it
falls back to the dummy/default policy. The fall back is done a slight
round-about way. This commit makes the direct call to the default policy's
logic, xsm_default_action().

Signed-off-by: Daniel P. Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>
---
 xen/xsm/silo.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/xen/xsm/silo.c b/xen/xsm/silo.c
index 6db793f35c..56a330a831 100644
--- a/xen/xsm/silo.c
+++ b/xen/xsm/silo.c
@@ -17,6 +17,7 @@
  * You should have received a copy of the GNU General Public License along with
  * this program; If not, see <http://www.gnu.org/licenses/>.
  */
+#include <xsm/xsm-core.h>
 #include <xsm/dummy.h>
 
 /*
@@ -43,7 +44,7 @@ static int silo_evtchn_unbound(struct domain *d1, struct 
evtchn *chn,
     else
     {
         if ( silo_mode_dom_check(d1, d2) )
-            rc = xsm_evtchn_unbound(d1, chn, id2);
+            rc = xsm_default_action(XSM_TARGET, current->domain, d1);
         rcu_unlock_domain(d2);
     }
 
@@ -54,7 +55,7 @@ static int silo_evtchn_interdomain(struct domain *d1, struct 
evtchn *chan1,
                                    struct domain *d2, struct evtchn *chan2)
 {
     if ( silo_mode_dom_check(d1, d2) )
-        return xsm_evtchn_interdomain(d1, chan1, d2, chan2);
+        return xsm_default_action(XSM_HOOK, d1, d2);
     return -EPERM;
 }
 
@@ -62,21 +63,21 @@ static int silo_grant_mapref(struct domain *d1, struct 
domain *d2,
                              uint32_t flags)
 {
     if ( silo_mode_dom_check(d1, d2) )
-        return xsm_grant_mapref(d1, d2, flags);
+        return xsm_default_action(XSM_HOOK, d1, d2);
     return -EPERM;
 }
 
 static int silo_grant_transfer(struct domain *d1, struct domain *d2)
 {
     if ( silo_mode_dom_check(d1, d2) )
-        return xsm_grant_transfer(d1, d2);
+        return xsm_default_action(XSM_HOOK, d1, d2);
     return -EPERM;
 }
 
 static int silo_grant_copy(struct domain *d1, struct domain *d2)
 {
     if ( silo_mode_dom_check(d1, d2) )
-        return xsm_grant_copy(d1, d2);
+        return xsm_default_action(XSM_HOOK, d1, d2);
     return -EPERM;
 }
 
@@ -86,14 +87,14 @@ static int silo_argo_register_single_source(const struct 
domain *d1,
                                             const struct domain *d2)
 {
     if ( silo_mode_dom_check(d1, d2) )
-        return xsm_argo_register_single_source(d1, d2);
+        return 0;
     return -EPERM;
 }
 
 static int silo_argo_send(const struct domain *d1, const struct domain *d2)
 {
     if ( silo_mode_dom_check(d1, d2) )
-        return xsm_argo_send(d1, d2);
+        return 0;
     return -EPERM;
 }
 
-- 
2.20.1