6 #include <linux/device.h>
7 #include <linux/cdev.h>
8 #include <linux/errno.h>
9 #include <linux/percpu.h>
11 #include <linux/uaccess.h>
12 #include <linux/poll.h>
13 #include <linux/anon_inodes.h>
14 #include <linux/sched.h>
15 #include <linux/vmalloc.h>
16 #include <linux/file.h>
17 #include <linux/spinlock.h>
18 #include <linux/rbtree.h>
20 #include <palacios/vmm.h>
24 #include "linux-exts.h"
30 int (*handler)(struct v3_guest * guest,
31 unsigned int cmd, unsigned long arg,
36 struct rb_node tree_node;
40 static inline struct vm_ctrl * __insert_ctrl(struct v3_guest * vm,
41 struct vm_ctrl * ctrl) {
42 struct rb_node ** p = &(vm->vm_ctrls.rb_node);
43 struct rb_node * parent = NULL;
44 struct vm_ctrl * tmp_ctrl = NULL;
48 tmp_ctrl = rb_entry(parent, struct vm_ctrl, tree_node);
50 if (ctrl->cmd < tmp_ctrl->cmd) {
52 } else if (ctrl->cmd > tmp_ctrl->cmd) {
59 rb_link_node(&(ctrl->tree_node), parent, p);
66 int add_guest_ctrl(struct v3_guest * guest, unsigned int cmd,
67 int (*handler)(struct v3_guest * guest,
68 unsigned int cmd, unsigned long arg,
71 struct vm_ctrl * ctrl = kmalloc(sizeof(struct vm_ctrl), GFP_KERNEL);
74 printk("Error: Could not allocate vm ctrl %d\n", cmd);
79 ctrl->handler = handler;
80 ctrl->priv_data = priv_data;
82 if (__insert_ctrl(guest, ctrl) != NULL) {
83 printk("Could not insert guest ctrl %d\n", cmd);
88 rb_insert_color(&(ctrl->tree_node), &(guest->vm_ctrls));
94 static struct vm_ctrl * get_ctrl(struct v3_guest * guest, unsigned int cmd) {
95 struct rb_node * n = guest->vm_ctrls.rb_node;
96 struct vm_ctrl * ctrl = NULL;
99 ctrl = rb_entry(n, struct vm_ctrl, tree_node);
101 if (cmd < ctrl->cmd) {
103 } else if (cmd > ctrl->cmd) {
119 extern struct class * v3_class;
122 static long v3_vm_ioctl(struct file * filp,
123 unsigned int ioctl, unsigned long arg) {
125 struct v3_guest * guest = filp->private_data;
127 printk("V3 IOCTL %d\n", ioctl);
132 printk("Stopping VM (%s)\n", guest->name);
133 stop_palacios_vm(guest);
137 printk("Pausing VM (%s)\n", guest->name);
138 v3_pause_vm(guest->v3_ctx);
141 case V3_VM_CONTINUE: {
142 printk("Continuing VM (%s)\n", guest->name);
143 v3_continue_vm(guest->v3_ctx);
146 case V3_VM_MOVE_CORE: {
147 struct v3_core_move_cmd cmd;
148 void __user * argp = (void __user *)arg;
150 memset(&cmd, 0, sizeof(struct v3_core_move_cmd));
152 if (copy_from_user(&cmd, argp, sizeof(struct v3_core_move_cmd))) {
153 printk("copy from user error getting migrate command...\n");
157 printk("moving guest %s vcore %d to CPU %d\n", guest->name, cmd.vcore_id, cmd.pcore_id);
159 v3_move_vm_core(guest->v3_ctx, cmd.vcore_id, cmd.pcore_id);
164 struct vm_ctrl * ctrl = get_ctrl(guest, ioctl);
167 return ctrl->handler(guest, ioctl, arg, ctrl->priv_data);
171 printk("\tUnhandled ctrl cmd: %d\n", ioctl);
179 static int v3_vm_open(struct inode * inode, struct file * filp) {
180 struct v3_guest * guest = container_of(inode->i_cdev, struct v3_guest, cdev);
181 filp->private_data = guest;
186 static ssize_t v3_vm_read(struct file * filp, char __user * buf, size_t size, loff_t * offset) {
192 static ssize_t v3_vm_write(struct file * filp, const char __user * buf, size_t size, loff_t * offset) {
198 static struct file_operations v3_vm_fops = {
199 .owner = THIS_MODULE,
200 .unlocked_ioctl = v3_vm_ioctl,
201 .compat_ioctl = v3_vm_ioctl,
204 .write = v3_vm_write,
208 extern u32 pg_allocs;
213 int start_palacios_vm(void * arg) {
214 struct v3_guest * guest = (struct v3_guest *)arg;
218 daemonize(guest->name);
219 // allow_signal(SIGKILL);
222 init_vm_extensions(guest);
224 guest->v3_ctx = v3_create_vm(guest->img, (void *)guest, guest->name);
226 if (guest->v3_ctx == NULL) {
227 printk("palacios: failed to create vm\n");
228 complete(&(guest->start_done));
233 printk("Creating VM device: Major %d, Minor %d\n", MAJOR(guest->vm_dev), MINOR(guest->vm_dev));
235 cdev_init(&(guest->cdev), &v3_vm_fops);
237 guest->cdev.owner = THIS_MODULE;
238 guest->cdev.ops = &v3_vm_fops;
241 printk("Adding VM device\n");
242 err = cdev_add(&(guest->cdev), guest->vm_dev, 1);
245 printk("Fails to add cdev\n");
246 v3_free_vm(guest->v3_ctx);
247 complete(&(guest->start_done));
251 if (device_create(v3_class, NULL, guest->vm_dev, guest, "v3-vm%d", MINOR(guest->vm_dev)) == NULL){
252 printk("Fails to create device\n");
253 cdev_del(&(guest->cdev));
254 v3_free_vm(guest->v3_ctx);
255 complete(&(guest->start_done));
259 complete(&(guest->start_done));
261 printk("palacios: launching vm\n");
263 if (v3_start_vm(guest->v3_ctx, 0xffffffff) < 0) {
264 printk("palacios: launch of vm failed\n");
265 device_destroy(v3_class, guest->vm_dev);
266 cdev_del(&(guest->cdev));
267 v3_free_vm(guest->v3_ctx);
271 complete(&(guest->thread_done));
273 printk("palacios: vm completed. returning.\n");
281 int stop_palacios_vm(struct v3_guest * guest) {
283 v3_stop_vm(guest->v3_ctx);
285 wait_for_completion(&(guest->thread_done));
287 v3_free_vm(guest->v3_ctx);
289 device_destroy(v3_class, guest->vm_dev);
291 cdev_del(&(guest->cdev));