added device checkpoint hooks

[palacios.git] / palacios / src / devices / os_debug.c

diff --git a/palacios/src/devices/os_debug.c b/palacios/src/devices/os_debug.c
index 7abdeb0..f821415 100644 (file)
--- a/palacios/src/devices/os_debug.c
+++ b/palacios/src/devices/os_debug.c
@@ -26,7 +26,6 @@
 #define BUF_SIZE 1024
 
 #define DEBUG_PORT1 0xc0c0
-#define DEBUG_HCALL 0xc0c0
 
 struct debug_state {
     char debug_buf[BUF_SIZE];
@@ -35,8 +34,8 @@ struct debug_state {
 };
 
 
-static int handle_gen_write(ushort_t port, void * src, uint_t length, struct vm_device * dev) {
-    struct debug_state * state = (struct debug_state *)dev->private_data;
+static int handle_gen_write(struct guest_info * core, ushort_t port, void * src, uint_t length, void * priv_data) {
+    struct debug_state * state = priv_data;
 
     state->debug_buf[state->debug_offset++] = *(char*)src;
 
@@ -50,8 +49,7 @@ static int handle_gen_write(ushort_t port, void * src, uint_t length, struct vm_
 }
 
 static int handle_hcall(struct guest_info * info, uint_t hcall_id, void * priv_data) {
-    struct vm_device * dev = (struct vm_device *)priv_data;
-    struct debug_state * state = (struct debug_state *)dev->private_data;
+    struct debug_state * state = (struct debug_state *)priv_data;
 
     int msg_len = info->vm_regs.rcx;
     addr_t msg_gpa = info->vm_regs.rbx;
@@ -63,12 +61,12 @@ static int handle_hcall(struct guest_info * info, uint_t hcall_id, void * priv_d
     }
 
     if (buf_is_va == 1) {
-       if (read_guest_va_memory(info, msg_gpa, msg_len, (uchar_t *)state->debug_buf) != msg_len) {
+       if (v3_read_gva_memory(info, msg_gpa, msg_len, (uchar_t *)state->debug_buf) != msg_len) {
            PrintError("Could not read debug message\n");
            return -1;
        }
     } else {
-       if (read_guest_pa_memory(info, msg_gpa, msg_len, (uchar_t *)state->debug_buf) != msg_len) {
+       if (v3_read_gpa_memory(info, msg_gpa, msg_len, (uchar_t *)state->debug_buf) != msg_len) {
            PrintError("Could not read debug message\n");
            return -1;
        }
@@ -83,43 +81,72 @@ static int handle_hcall(struct guest_info * info, uint_t hcall_id, void * priv_d
 
 
 
-static int debug_free(struct vm_device * dev) {
-    v3_dev_unhook_io(dev, DEBUG_PORT1);
+static int debug_free(struct debug_state * state) {
 
+    // unregister hypercall
 
+    V3_Free(state);
     return 0;
 };
 
+#ifdef V3_CONFIG_CHECKPOINT
+static int debug_save(struct v3_chkpt_ctx * ctx, void * private_data) {
+    struct debug_state * dbg = (struct debug_state *)private_data;
+    
+    V3_CHKPT_STD_SAVE(ctx, dbg->debug_buf);
+    V3_CHKPT_STD_SAVE(ctx, dbg->debug_offset);
+    
+    return 0;
+}
+
+
+static int debug_load(struct v3_chkpt_ctx * ctx, void * private_data) {
+    struct debug_state * dbg = (struct debug_state *)private_data;
+    
+    V3_CHKPT_STD_LOAD(ctx, dbg->debug_buf);
+    V3_CHKPT_STD_LOAD(ctx, dbg->debug_offset);
+    
+    return 0;
+}
+
+#endif
 
 
 
 static struct v3_device_ops dev_ops = {
-    .free = debug_free,
-    .reset = NULL,
-    .start = NULL,
-    .stop = NULL,
+    .free = (int (*)(void *))debug_free,
+#ifdef V3_CONFIG_CHECKPOINT
+    .save = debug_save,
+    .load = debug_load
+#endif 
 };
 
 
 
 
-static int debug_init(struct guest_info * vm, void * cfg_data) {
+static int debug_init(struct v3_vm_info * vm, v3_cfg_tree_t * cfg) {
     struct debug_state * state = NULL;
+    char * dev_id = v3_cfg_val(cfg, "ID");
 
     state = (struct debug_state *)V3_Malloc(sizeof(struct debug_state));
 
     PrintDebug("Creating OS Debug Device\n");
 
-    struct vm_device * dev = v3_allocate_device("OS_DEBUG", &dev_ops, state);
+    struct vm_device * dev = v3_add_device(vm, dev_id, &dev_ops, state);
 
+    if (dev == NULL) {
+       PrintError("Could not attach device %s\n", dev_id);
+       V3_Free(state);
+       return -1;
+    }
 
-    if (v3_attach_device(vm, dev) == -1) {
-       PrintError("Could not attach device %s\n", "OS_DEBUG");
+    if (v3_dev_hook_io(dev, DEBUG_PORT1,  NULL, &handle_gen_write) == -1) {
+       PrintError("Error hooking OS debug IO port\n");
+       v3_remove_device(dev);
        return -1;
     }
 
-    v3_dev_hook_io(dev, DEBUG_PORT1,  NULL, &handle_gen_write);
-    v3_register_hypercall(vm, DEBUG_HCALL, handle_hcall, dev);
+    v3_register_hypercall(vm, OS_DEBUG_HCALL, handle_hcall, state);
 
     state->debug_offset = 0;
     memset(state->debug_buf, 0, BUF_SIZE);