integrated new configuration system

[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 adf9b06..a51dc19 100644 (file)
--- a/palacios/src/devices/os_debug.c
+++ b/palacios/src/devices/os_debug.c
@@ -18,13 +18,15 @@
  */
 
 
-#include <devices/os_debug.h>
+
 #include <palacios/vmm.h>
+#include <palacios/vmm_dev_mgr.h>
+#include <palacios/vm_guest_mem.h>
 
 #define BUF_SIZE 1024
 
 #define DEBUG_PORT1 0xc0c0
-
+#define DEBUG_HCALL 0xc0c0
 
 struct debug_state {
     char debug_buf[BUF_SIZE];
@@ -47,19 +49,41 @@ static int handle_gen_write(ushort_t port, void * src, uint_t length, struct vm_
     return length;
 }
 
-
-static int debug_init(struct vm_device * dev) {
+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;
 
-    v3_dev_hook_io(dev, DEBUG_PORT1,  NULL, &handle_gen_write);
+    int msg_len = info->vm_regs.rcx;
+    addr_t msg_gpa = info->vm_regs.rbx;
+    int buf_is_va = info->vm_regs.rdx;
+
+    if (msg_len >= BUF_SIZE) {
+       PrintError("Console message too large for buffer (len=%d)\n", msg_len);
+       return -1;
+    }
+
+    if (buf_is_va == 1) {
+       if (read_guest_va_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) {
+           PrintError("Could not read debug message\n");
+           return -1;
+       }
+    }  
+
+    state->debug_buf[msg_len] = 0;
+
+    PrintDebug("VM_CONSOLE>%s\n", state->debug_buf);
 
-    state->debug_offset = 0;
-    memset(state->debug_buf, 0, BUF_SIZE);
-  
     return 0;
 }
 
-static int debug_deinit(struct vm_device * dev) {
+
+
+static int debug_free(struct vm_device * dev) {
     v3_dev_unhook_io(dev, DEBUG_PORT1);
 
 
@@ -69,24 +93,40 @@ static int debug_deinit(struct vm_device * dev) {
 
 
 
-static struct vm_device_ops dev_ops = {
-    .init = debug_init,
-    .deinit = debug_deinit,
+static struct v3_device_ops dev_ops = {
+    .free = debug_free,
     .reset = NULL,
     .start = NULL,
     .stop = NULL,
 };
 
 
-struct vm_device * v3_create_os_debug() {
+
+
+static int debug_init(struct guest_info * vm, v3_cfg_tree_t * cfg) {
     struct debug_state * state = NULL;
+    char * name = v3_cfg_val(cfg, "name");
 
     state = (struct debug_state *)V3_Malloc(sizeof(struct debug_state));
 
     PrintDebug("Creating OS Debug Device\n");
-    struct vm_device * device = v3_create_device("OS Debug", &dev_ops, state);
+
+    struct vm_device * dev = v3_allocate_device(name, &dev_ops, state);
 
 
+    if (v3_attach_device(vm, dev) == -1) {
+       PrintError("Could not attach device %s\n", name);
+       return -1;
+    }
+
+    v3_dev_hook_io(dev, DEBUG_PORT1,  NULL, &handle_gen_write);
+    v3_register_hypercall(vm, DEBUG_HCALL, handle_hcall, dev);
 
-    return device;
+    state->debug_offset = 0;
+    memset(state->debug_buf, 0, BUF_SIZE);
+  
+    return 0;
 }
+
+
+device_register("OS_DEBUG", debug_init)