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"
27 #include "linux-exts.h"
30 #ifdef V3_CONFIG_KEYED_STREAMS
31 #include "palacios-keyed-stream.h"
35 MODULE_LICENSE("GPL");
41 static int v3_major_num = 0;
43 static u8 v3_minor_map[MAX_VMS / 8] = {[0 ... (MAX_VMS / 8) - 1] = 0};
46 struct class * v3_class = NULL;
47 static struct cdev ctrl_dev;
49 static int register_vm( void ) {
53 for (i = 0; i < sizeof(v3_minor_map); i++) {
54 if (v3_minor_map[i] != 0xff) {
55 for (j = 0; j < 8; j++) {
56 if (!(v3_minor_map[i] & (0x1 << j))) {
58 v3_minor_map[i] |= (0x1 << j);
78 static long v3_dev_ioctl(struct file * filp,
79 unsigned int ioctl, unsigned long arg) {
80 void __user * argp = (void __user *)arg;
81 printk("V3 IOCTL %d\n", ioctl);
87 struct v3_guest_img user_image;
88 struct v3_guest * guest = kmalloc(sizeof(struct v3_guest), GFP_KERNEL);
91 printk("Error allocating Kernel guest_image\n");
95 memset(guest, 0, sizeof(struct v3_guest));
97 printk("Starting V3 Guest...\n");
99 vm_minor = register_vm();
101 if (vm_minor == -1) {
102 printk("Too many VMs are currently running\n");
106 guest->vm_dev = MKDEV(v3_major_num, vm_minor);
108 if (copy_from_user(&user_image, argp, sizeof(struct v3_guest_img))) {
109 printk("copy from user error getting guest image...\n");
113 guest->img_size = user_image.size;
115 printk("Allocating kernel memory for guest image (%llu bytes)\n", user_image.size);
116 guest->img = vmalloc(guest->img_size);
118 if (IS_ERR(guest->img)) {
119 printk("Error: Could not allocate space for guest image\n");
123 if (copy_from_user(guest->img, user_image.guest_data, guest->img_size)) {
124 printk("Error loading guest data\n");
128 strncpy(guest->name, user_image.name, 127);
130 printk("Launching VM\n");
132 INIT_LIST_HEAD(&(guest->exts));
135 #ifdef V3_CONFIG_HOST_DEVICE
136 INIT_LIST_HEAD(&(guest->hostdev.devs));
138 init_completion(&(guest->start_done));
139 init_completion(&(guest->thread_done));
142 struct task_struct * launch_thread = NULL;
143 // At some point we're going to want to allow the user to specify a CPU mask
144 // But for now, well just launch from the local core, and rely on the global cpu mask
147 launch_thread = kthread_create(start_palacios_vm, guest, guest->name);
149 if (IS_ERR(launch_thread)) {
151 printk("Palacios error creating launch thread for vm (%s)\n", guest->name);
155 kthread_bind(launch_thread, smp_processor_id());
158 wake_up_process(launch_thread);
161 wait_for_completion(&(guest->start_done));
163 return guest->vm_dev;
166 case V3_ADD_MEMORY: {
167 struct v3_mem_region mem;
169 memset(&mem, 0, sizeof(struct v3_mem_region));
171 if (copy_from_user(&mem, argp, sizeof(struct v3_mem_region))) {
172 printk("copy from user error getting mem_region...\n");
176 printk("Adding %llu pages to Palacios memory\n", mem.num_pages);
178 if (add_palacios_memory(mem.base_addr, mem.num_pages) == -1) {
179 printk("Error adding memory to Palacios\n");
187 printk("\tUnhandled\n");
196 static struct file_operations v3_ctrl_fops = {
197 .owner = THIS_MODULE,
198 .unlocked_ioctl = v3_dev_ioctl,
199 .compat_ioctl = v3_dev_ioctl,
204 static int __init v3_init(void) {
205 dev_t dev = MKDEV(0, 0); // We dynamicallly assign the major number
212 // Initialize Palacios
217 // initialize extensions
218 init_lnx_extensions();
221 v3_class = class_create(THIS_MODULE, "vms");
222 if (IS_ERR(v3_class)) {
223 printk("Failed to register V3 VM device class\n");
224 return PTR_ERR(v3_class);
227 printk("intializing V3 Control device\n");
229 ret = alloc_chrdev_region(&dev, 0, MAX_VMS + 1, "v3vee");
232 printk("Error registering device region for V3 devices\n");
236 v3_major_num = MAJOR(dev);
238 dev = MKDEV(v3_major_num, MAX_VMS + 1);
241 printk("Creating V3 Control device: Major %d, Minor %d\n", v3_major_num, MINOR(dev));
242 cdev_init(&ctrl_dev, &v3_ctrl_fops);
243 ctrl_dev.owner = THIS_MODULE;
244 ctrl_dev.ops = &v3_ctrl_fops;
245 cdev_add(&ctrl_dev, dev, 1);
247 device_create(v3_class, NULL, dev, NULL, "v3vee");
250 printk("Error adding v3 control device\n");
257 #ifdef V3_CONFIG_KEYED_STREAMS
258 palacios_init_keyed_streams();
261 #ifdef V3_CONFIG_GRAPHICS_CONSOLE
262 palacios_init_graphics_console();
265 #ifdef V3_CONFIG_VNET
266 palacios_vnet_init();
269 #ifdef V3_CONFIG_HOST_DEVICE
270 palacios_init_host_dev();
276 unregister_chrdev_region(MKDEV(v3_major_num, 0), MAX_VMS + 1);
278 class_destroy(v3_class);
284 static void __exit v3_exit(void) {
285 extern u32 pg_allocs;
291 // should probably try to stop any guests
295 dev_t dev = MKDEV(v3_major_num, MAX_VMS + 1);
297 printk("Removing V3 Control device\n");
302 printk("Palacios Mallocs = %d, Frees = %d\n", mallocs, frees);
303 printk("Palacios Page Allocs = %d, Page Frees = %d\n", pg_allocs, pg_frees);
305 unregister_chrdev_region(MKDEV(v3_major_num, 0), MAX_VMS + 1);
309 device_destroy(v3_class, dev);
310 class_destroy(v3_class);
313 deinit_lnx_extensions();
317 #ifdef V3_CONFIG_VNET
318 palacios_vnet_deinit();
321 palacios_deinit_mm();
323 printk("Palacios Module Mallocs = %d, Frees = %d\n", mod_allocs, mod_frees);
328 module_init(v3_init);
329 module_exit(v3_exit);
333 void * trace_malloc(size_t size, gfp_t flags) {
337 addr = kmalloc(size, flags);
343 void trace_free(const void * objp) {