2 Palacios main control interface
7 #include <linux/module.h>
8 #include <linux/errno.h>
9 #include <linux/percpu.h>
11 #include <linux/uaccess.h>
12 #include <linux/device.h>
13 #include <linux/cdev.h>
17 #include <linux/file.h>
18 #include <linux/spinlock.h>
19 #include <linux/kthread.h>
22 #include "palacios-mm.h"
23 #include "palacios-vm.h"
24 #include "palacios-serial.h"
25 #include "palacios-vnet.h"
26 #include "palacios-packet.h"
28 #include "linux-exts.h"
31 #ifdef V3_CONFIG_KEYED_STREAMS
32 #include "palacios-keyed-stream.h"
36 MODULE_LICENSE("GPL");
42 static int v3_major_num = 0;
44 static u8 v3_minor_map[MAX_VMS / 8] = {[0 ... (MAX_VMS / 8) - 1] = 0};
47 struct class * v3_class = NULL;
48 static struct cdev ctrl_dev;
50 static int register_vm( void ) {
54 for (i = 0; i < sizeof(v3_minor_map); i++) {
55 if (v3_minor_map[i] != 0xff) {
56 for (j = 0; j < 8; j++) {
57 if (!(v3_minor_map[i] & (0x1 << j))) {
59 v3_minor_map[i] |= (0x1 << j);
79 static long v3_dev_ioctl(struct file * filp,
80 unsigned int ioctl, unsigned long arg) {
81 void __user * argp = (void __user *)arg;
82 printk("V3 IOCTL %d\n", ioctl);
88 struct v3_guest_img user_image;
89 struct v3_guest * guest = kmalloc(sizeof(struct v3_guest), GFP_KERNEL);
92 printk("Error allocating Kernel guest_image\n");
96 memset(guest, 0, sizeof(struct v3_guest));
98 printk("Starting V3 Guest...\n");
100 vm_minor = register_vm();
102 if (vm_minor == -1) {
103 printk("Too many VMs are currently running\n");
107 guest->vm_dev = MKDEV(v3_major_num, vm_minor);
109 if (copy_from_user(&user_image, argp, sizeof(struct v3_guest_img))) {
110 printk("copy from user error getting guest image...\n");
114 guest->img_size = user_image.size;
116 printk("Allocating kernel memory for guest image (%llu bytes)\n", user_image.size);
117 guest->img = vmalloc(guest->img_size);
119 if (IS_ERR(guest->img)) {
120 printk("Error: Could not allocate space for guest image\n");
124 if (copy_from_user(guest->img, user_image.guest_data, guest->img_size)) {
125 printk("Error loading guest data\n");
129 strncpy(guest->name, user_image.name, 127);
131 printk("Launching VM\n");
133 INIT_LIST_HEAD(&(guest->exts));
136 #ifdef V3_CONFIG_HOST_DEVICE
137 INIT_LIST_HEAD(&(guest->hostdev.devs));
139 init_completion(&(guest->start_done));
140 init_completion(&(guest->thread_done));
143 struct task_struct * launch_thread = NULL;
144 // At some point we're going to want to allow the user to specify a CPU mask
145 // But for now, well just launch from the local core, and rely on the global cpu mask
148 launch_thread = kthread_create(start_palacios_vm, guest, guest->name);
150 if (IS_ERR(launch_thread)) {
152 printk("Palacios error creating launch thread for vm (%s)\n", guest->name);
156 kthread_bind(launch_thread, smp_processor_id());
159 wake_up_process(launch_thread);
162 wait_for_completion(&(guest->start_done));
164 return guest->vm_dev;
167 case V3_ADD_MEMORY: {
168 struct v3_mem_region mem;
170 memset(&mem, 0, sizeof(struct v3_mem_region));
172 if (copy_from_user(&mem, argp, sizeof(struct v3_mem_region))) {
173 printk("copy from user error getting mem_region...\n");
177 printk("Adding %llu pages to Palacios memory\n", mem.num_pages);
179 if (add_palacios_memory(mem.base_addr, mem.num_pages) == -1) {
180 printk("Error adding memory to Palacios\n");
188 printk("\tUnhandled\n");
197 static struct file_operations v3_ctrl_fops = {
198 .owner = THIS_MODULE,
199 .unlocked_ioctl = v3_dev_ioctl,
200 .compat_ioctl = v3_dev_ioctl,
205 static int __init v3_init(void) {
206 dev_t dev = MKDEV(0, 0); // We dynamicallly assign the major number
213 // Initialize Palacios
218 // initialize extensions
219 init_lnx_extensions();
222 v3_class = class_create(THIS_MODULE, "vms");
223 if (IS_ERR(v3_class)) {
224 printk("Failed to register V3 VM device class\n");
225 return PTR_ERR(v3_class);
228 printk("intializing V3 Control device\n");
230 ret = alloc_chrdev_region(&dev, 0, MAX_VMS + 1, "v3vee");
233 printk("Error registering device region for V3 devices\n");
237 v3_major_num = MAJOR(dev);
239 dev = MKDEV(v3_major_num, MAX_VMS + 1);
242 printk("Creating V3 Control device: Major %d, Minor %d\n", v3_major_num, MINOR(dev));
243 cdev_init(&ctrl_dev, &v3_ctrl_fops);
244 ctrl_dev.owner = THIS_MODULE;
245 ctrl_dev.ops = &v3_ctrl_fops;
246 cdev_add(&ctrl_dev, dev, 1);
248 device_create(v3_class, NULL, dev, NULL, "v3vee");
251 printk("Error adding v3 control device\n");
258 #ifdef V3_CONFIG_KEYED_STREAMS
259 palacios_init_keyed_streams();
262 #ifdef V3_CONFIG_GRAPHICS_CONSOLE
263 palacios_init_graphics_console();
268 #ifdef V3_CONFIG_PACKET
269 palacios_init_packet(NULL);
272 #ifdef V3_CONFIG_VNET
273 palacios_vnet_init();
276 #ifdef V3_CONFIG_HOST_DEVICE
277 palacios_init_host_dev();
283 unregister_chrdev_region(MKDEV(v3_major_num, 0), MAX_VMS + 1);
285 class_destroy(v3_class);
291 static void __exit v3_exit(void) {
292 extern u32 pg_allocs;
298 // should probably try to stop any guests
302 dev_t dev = MKDEV(v3_major_num, MAX_VMS + 1);
304 printk("Removing V3 Control device\n");
309 printk("Palacios Mallocs = %d, Frees = %d\n", mallocs, frees);
310 printk("Palacios Page Allocs = %d, Page Frees = %d\n", pg_allocs, pg_frees);
312 unregister_chrdev_region(MKDEV(v3_major_num, 0), MAX_VMS + 1);
316 device_destroy(v3_class, dev);
317 class_destroy(v3_class);
320 deinit_lnx_extensions();
324 #ifdef V3_CONFIG_VNET
325 palacios_vnet_deinit();
328 palacios_deinit_mm();
330 printk("Palacios Module Mallocs = %d, Frees = %d\n", mod_allocs, mod_frees);
335 module_init(v3_init);
336 module_exit(v3_exit);
340 void * trace_malloc(size_t size, gfp_t flags) {
344 addr = kmalloc(size, flags);
350 void trace_free(const void * objp) {