[PATCH 08/16] x86/P2M: PoD, altp2m, and nested-p2m are HVM-only

[Jan Beulich <jbeulich@xxxxxxxx>]

There's no need to initialize respective data for PV domains. Note that
p2m_teardown_{alt,nested}p2m() will handle the lack-of-initialization
case fine.

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/arch/x86/mm/p2m.c
+++ b/xen/arch/x86/mm/p2m.c
@@ -102,6 +102,9 @@ static int p2m_initialise(struct domain
     p2m->default_access = p2m_access_rwx;
     p2m->p2m_class = p2m_host;
 
+    if ( !is_hvm_domain(d) )
+        return 0;
+
     p2m_pod_init(p2m);
     p2m_nestedp2m_init(p2m);
 
@@ -259,7 +262,7 @@ int p2m_init(struct domain *d)
     int rc;
 
     rc = p2m_init_hostp2m(d);
-    if ( rc )
+    if ( rc || !is_hvm_domain(d) )
         return rc;
 
 #ifdef CONFIG_HVM
--- a/xen/arch/x86/mm/p2m.h
+++ b/xen/arch/x86/mm/p2m.h
@@ -17,6 +17,8 @@
 
 #include <xen/mem_access.h>
 
+void p2m_pod_init(struct p2m_domain *p2m);
+
 int p2m_add_identity_entry(struct domain *d, unsigned long gfn,
                            p2m_access_t p2ma, unsigned int flag);
 int p2m_remove_identity_entry(struct domain *d, unsigned long gfn);
--- a/xen/arch/x86/mm/p2m-pod.c
+++ b/xen/arch/x86/mm/p2m-pod.c
@@ -1135,6 +1135,12 @@ p2m_pod_demand_populate(struct p2m_domai
     mfn_t mfn;
     unsigned long i;
 
+    if ( !p2m_is_hostp2m(p2m) )
+    {
+        ASSERT_UNREACHABLE();
+        return false;
+    }
+
     ASSERT(gfn_locked_by_me(p2m, gfn));
     pod_lock(p2m);
 
--- a/xen/include/asm-x86/p2m.h
+++ b/xen/include/asm-x86/p2m.h
@@ -679,8 +679,6 @@ static inline long p2m_pod_entry_count(c
     return p2m->pod.entry_count;
 }
 
-void p2m_pod_init(struct p2m_domain *p2m);
-
 #else
 
 static inline bool
@@ -709,8 +707,6 @@ static inline long p2m_pod_entry_count(c
     return 0;
 }
 
-static inline void p2m_pod_init(struct p2m_domain *p2m) {}
-
 #endif