added initial global shutdown functionality

[palacios.git] / palacios / src / palacios / vmm_shadow_paging.c

diff --git a/palacios/src/palacios/vmm_shadow_paging.c b/palacios/src/palacios/vmm_shadow_paging.c
index f4e9f32..b46469c 100644 (file)
--- a/palacios/src/palacios/vmm_shadow_paging.c
+++ b/palacios/src/palacios/vmm_shadow_paging.c
@@ -47,6 +47,8 @@
 #endif
 
 
+static const char default_strategy[] = "VTLB";
+
 
 static struct hashtable * master_shdw_pg_table = NULL;
 
@@ -93,6 +95,11 @@ int V3_init_shdw_paging() {
     return 0;
 }
 
+int V3_deinit_shdw_paging() {
+    v3_free_htable(master_shdw_pg_table, 0, 0);
+    return 0;
+}
+
 
 
 /*** 
@@ -137,26 +144,46 @@ int v3_init_shdw_pg_state(struct guest_info * core) {
 }
 
 
+int v3_deinit_shdw_pg_state(struct guest_info * core) {
+    struct v3_shdw_pg_impl * impl = core->vm_info->shdw_impl.current_impl;
+
+    if (impl->local_deinit(core) == -1) {
+       PrintError("Error deinitializing shadow paging state\n");
+       return -1;
+    }
+
+#ifdef CONFIG_SHADOW_PAGING_TELEMETRY
+    v3_remove_telemetry_cb(core->vm_info, telemetry_cb, NULL);
+#endif
+
+    return 0;
+}
+
+
 
 int v3_init_shdw_impl(struct v3_vm_info * vm) {
     struct v3_shdw_impl_state * impl_state = &(vm->shdw_impl);
     v3_cfg_tree_t * pg_cfg = v3_cfg_subtree(vm->cfg_data->cfg, "paging");
-    char * type_name = v3_cfg_val(pg_cfg, "type");
-    char * impl_name = v3_cfg_val(pg_cfg, "mode");
+    char * pg_mode = v3_cfg_val(pg_cfg, "mode");
+    char * pg_strat = v3_cfg_val(pg_cfg, "strategy");
     struct v3_shdw_pg_impl * impl = NULL;
    
     PrintDebug("Checking if shadow paging requested.\n");
-    if (type_name && (strcasecmp(type_name, "shadow") != 0)) {
-       PrintDebug("Shadow paging not specified for VM.\n");
+    if ((pg_mode != NULL) && (strcasecmp(pg_mode, "nested") == 0)) {
+       PrintDebug("Nested paging specified - not initializing shadow paging.\n");
        return 0;
     }
+
+    if (pg_strat == NULL) {
+       pg_strat = (char *)default_strategy;
+    }
        
     V3_Print("Initialization of Shadow Paging implementation\n");
 
-    impl = (struct v3_shdw_pg_impl *)v3_htable_search(master_shdw_pg_table, (addr_t)impl_name);
+    impl = (struct v3_shdw_pg_impl *)v3_htable_search(master_shdw_pg_table, (addr_t)pg_strat);
 
     if (impl == NULL) {
-       PrintError("Could not find shadow paging impl (%s)\n", impl_name);
+       PrintError("Could not find shadow paging impl (%s)\n", pg_strat);
        return -1;
     }
    
@@ -167,8 +194,16 @@ int v3_init_shdw_impl(struct v3_vm_info * vm) {
        return -1;
     }
 
-    
+    return 0;
+}
+
+int v3_deinit_shdw_impl(struct v3_vm_info * vm) {
+    struct v3_shdw_pg_impl * impl = vm->shdw_impl.current_impl;
 
+    if (impl->deinit(vm) == -1) {
+       PrintError("Error deinitializing shadow paging implementation\n");
+       return -1;
+    }
 
     return 0;
 }