2 Palacios main control interface
7 #include <linux/module.h>
8 #include <linux/moduleparam.h>
9 #include <linux/errno.h>
10 #include <linux/percpu.h>
12 #include <linux/uaccess.h>
13 #include <linux/device.h>
14 #include <linux/cdev.h>
18 #include <linux/file.h>
19 #include <linux/spinlock.h>
20 #include <linux/kthread.h>
26 #include "linux-exts.h"
30 MODULE_LICENSE("GPL");
33 int cpu_list[NR_CPUS] = {};
35 module_param_array(cpu_list, int, &cpu_list_len, 0644);
36 MODULE_PARM_DESC(cpu_list, "Comma-delimited list of CPUs that Palacios will run on");
42 static int v3_major_num = 0;
44 static struct v3_guest * guest_map[MAX_VMS] = {[0 ... MAX_VMS - 1] = 0};
46 struct class * v3_class = NULL;
47 static struct cdev ctrl_dev;
49 static int register_vm(struct v3_guest * guest) {
52 for (i = 0; i < MAX_VMS; i++) {
53 if (guest_map[i] == NULL) {
64 static long v3_dev_ioctl(struct file * filp,
65 unsigned int ioctl, unsigned long arg) {
66 void __user * argp = (void __user *)arg;
67 DEBUG("V3 IOCTL %d\n", ioctl);
71 case V3_CREATE_GUEST:{
73 struct v3_guest_img user_image;
74 struct v3_guest * guest = kmalloc(sizeof(struct v3_guest), GFP_KERNEL);
77 ERROR("Palacios: Error allocating Kernel guest_image\n");
81 memset(guest, 0, sizeof(struct v3_guest));
83 INFO("Palacios: Creating V3 Guest...\n");
85 vm_minor = register_vm(guest);
88 ERROR("Palacios Error: Too many VMs are currently running\n");
92 guest->vm_dev = MKDEV(v3_major_num, vm_minor);
94 if (copy_from_user(&user_image, argp, sizeof(struct v3_guest_img))) {
95 ERROR("Palacios Error: copy from user error getting guest image...\n");
99 guest->img_size = user_image.size;
101 DEBUG("Palacios: Allocating kernel memory for guest image (%llu bytes)\n", user_image.size);
102 guest->img = vmalloc(guest->img_size);
104 if (IS_ERR(guest->img)) {
105 ERROR("Palacios Error: Could not allocate space for guest image\n");
109 if (copy_from_user(guest->img, user_image.guest_data, guest->img_size)) {
110 ERROR("Palacios: Error loading guest data\n");
114 strncpy(guest->name, user_image.name, 127);
116 INIT_LIST_HEAD(&(guest->exts));
118 if (create_palacios_vm(guest) == -1) {
119 ERROR("Palacios: Error creating guest\n");
126 case V3_FREE_GUEST: {
127 unsigned long vm_idx = arg;
128 struct v3_guest * guest = guest_map[vm_idx];
130 INFO("Freeing VM (%s) (%p)\n", guest->name, guest);
132 free_palacios_vm(guest);
133 guest_map[vm_idx] = NULL;
136 case V3_ADD_MEMORY: {
137 struct v3_mem_region mem;
139 memset(&mem, 0, sizeof(struct v3_mem_region));
141 if (copy_from_user(&mem, argp, sizeof(struct v3_mem_region))) {
142 ERROR("copy from user error getting mem_region...\n");
146 DEBUG("Adding %llu pages to Palacios memory\n", mem.num_pages);
148 if (add_palacios_memory(mem.base_addr, mem.num_pages) == -1) {
149 ERROR("Error adding memory to Palacios\n");
157 ERROR("\tUnhandled\n");
166 static struct file_operations v3_ctrl_fops = {
167 .owner = THIS_MODULE,
168 .unlocked_ioctl = v3_dev_ioctl,
169 .compat_ioctl = v3_dev_ioctl,
174 static int __init v3_init(void) {
175 dev_t dev = MKDEV(0, 0); // We dynamicallly assign the major number
181 // Initialize Palacios
185 // initialize extensions
186 init_lnx_extensions();
189 v3_class = class_create(THIS_MODULE, "vms");
190 if (IS_ERR(v3_class)) {
191 ERROR("Failed to register V3 VM device class\n");
192 return PTR_ERR(v3_class);
195 INFO("intializing V3 Control device\n");
197 ret = alloc_chrdev_region(&dev, 0, MAX_VMS + 1, "v3vee");
200 ERROR("Error registering device region for V3 devices\n");
204 v3_major_num = MAJOR(dev);
206 dev = MKDEV(v3_major_num, MAX_VMS + 1);
209 DEBUG("Creating V3 Control device: Major %d, Minor %d\n", v3_major_num, MINOR(dev));
210 cdev_init(&ctrl_dev, &v3_ctrl_fops);
211 ctrl_dev.owner = THIS_MODULE;
212 ctrl_dev.ops = &v3_ctrl_fops;
213 cdev_add(&ctrl_dev, dev, 1);
215 device_create(v3_class, NULL, dev, NULL, "v3vee");
218 ERROR("Error adding v3 control device\n");
227 unregister_chrdev_region(MKDEV(v3_major_num, 0), MAX_VMS + 1);
229 class_destroy(v3_class);
235 static void __exit v3_exit(void) {
236 extern u32 pg_allocs;
242 // should probably try to stop any guests
246 dev_t dev = MKDEV(v3_major_num, MAX_VMS + 1);
248 INFO("Removing V3 Control device\n");
253 DEBUG("Palacios Mallocs = %d, Frees = %d\n", mallocs, frees);
254 DEBUG("Palacios Page Allocs = %d, Page Frees = %d\n", pg_allocs, pg_frees);
256 unregister_chrdev_region(MKDEV(v3_major_num, 0), MAX_VMS + 1);
260 device_destroy(v3_class, dev);
261 class_destroy(v3_class);
264 deinit_lnx_extensions();
266 palacios_deinit_mm();
268 DEBUG("Palacios Module Mallocs = %d, Frees = %d\n", mod_allocs, mod_frees);
273 module_init(v3_init);
274 module_exit(v3_exit);
278 void * trace_malloc(size_t size, gfp_t flags) {
282 addr = kmalloc(size, flags);
288 void trace_free(const void * objp) {