xen: Add versions of rcu_lock_*_domain without IS_PRIV

These functions will be used to avoid duplication of IS_PRIV calls
that will be introduced in XSM hooks. This also fixes a build error
with XSM enabled introduced by 25925:d1c3375c3f11 which depends on
this patch.

Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
Committed-by: Keir Fraser <keir@xen.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/xen/common/domain.c b/xen/common/domain.c
index a1aa05e03b..52489b3924 100644
--- a/xen/common/domain.c
+++ b/xen/common/domain.c
@@ -420,6 +420,13 @@ struct domain *rcu_lock_domain_by_id(domid_t dom)
     return d;
 }
 
+struct domain *rcu_lock_domain_by_any_id(domid_t dom)
+{
+    if ( dom == DOMID_SELF )
+        return rcu_lock_current_domain();
+    return rcu_lock_domain_by_id(dom);
+}
+
 int rcu_lock_target_domain_by_id(domid_t dom, struct domain **d)
 {
     if ( dom == DOMID_SELF )
@@ -454,6 +461,20 @@ int rcu_lock_remote_target_domain_by_id(domid_t dom, struct domain **d)
     return 0;
 }
 
+int rcu_lock_remote_domain_by_id(domid_t dom, struct domain **d)
+{
+    if ( (*d = rcu_lock_domain_by_id(dom)) == NULL )
+        return -ESRCH;
+
+    if ( *d == current->domain )
+    {
+        rcu_unlock_domain(*d);
+        return -EPERM;
+    }
+
+    return 0;
+}
+
 int domain_kill(struct domain *d)
 {
     int rc = 0;