Expose HVM state to host + Linux host /proc additions for it

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

diff --git a/palacios/src/palacios/vmm_mem_hook.c b/palacios/src/palacios/vmm_mem_hook.c
index f4040ff..1d49294 100644 (file)
--- a/palacios/src/palacios/vmm_mem_hook.c
+++ b/palacios/src/palacios/vmm_mem_hook.c
@@ -359,6 +359,12 @@ int v3_hook_write_mem(struct v3_vm_info * vm, uint16_t core_id,
 
     entry = v3_create_mem_region(vm, core_id, guest_addr_start, guest_addr_end);
 
+    if (!entry) { 
+       PrintError(vm, VCORE_NONE, "Cannot allocate a memory region\n");
+       V3_Free(hook);
+       return -1;
+    }
+
     hook->region = entry;
 
     entry->host_addr = host_addr;
@@ -370,6 +376,7 @@ int v3_hook_write_mem(struct v3_vm_info * vm, uint16_t core_id,
     entry->flags.alloced = 1;
 
     if (v3_insert_mem_region(vm, entry) == -1) {
+        PrintError(vm, VCORE_NONE, "Cannot insert memory region\n");
        V3_Free(entry);
        V3_Free(hook);
        return -1;
@@ -498,6 +505,7 @@ static int free_hook(struct v3_vm_info * vm, struct mem_hook * hook) {
 // We do not support unhooking subregions
 int v3_unhook_mem(struct v3_vm_info * vm, uint16_t core_id, addr_t guest_addr_start) {
     struct v3_mem_region * reg = v3_get_mem_region(vm, core_id, guest_addr_start);
+    struct v3_mem_hooks * hooks = &(vm->mem_hooks);
     struct mem_hook * hook = NULL;
 
     if (reg == NULL) {
@@ -515,6 +523,8 @@ int v3_unhook_mem(struct v3_vm_info * vm, uint16_t core_id, addr_t guest_addr_st
     
     free_hook(vm, hook);
 
+    v3_htable_remove(hooks->reg_table, (addr_t)reg, 0);
+
     return 0;
 }