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>
22 #include <linux/proc_fs.h>
23 #include <linux/seq_file.h>
25 #include <palacios/vmm.h>
30 #include "allow_devmem.h"
32 #include "lockcheck.h"
34 #include "linux-exts.h"
37 MODULE_LICENSE("GPL");
40 int cpu_list[NR_CPUS] = {};
42 module_param_array(cpu_list, int, &cpu_list_len, 0644);
43 MODULE_PARM_DESC(cpu_list, "Comma-delimited list of CPUs that Palacios will run on");
45 static int allow_devmem = 0;
46 module_param(allow_devmem, int, 0);
47 MODULE_PARM_DESC(allow_devmem, "Allow general user-space /dev/mem access even if kernel is strict");
49 // Palacios options parameter
51 module_param(options, charp, 0);
52 MODULE_PARM_DESC(options, "Generic options to internal Palacios modules");
58 static int v3_major_num = 0;
60 static struct v3_guest * guest_map[MAX_VMS] = {[0 ... MAX_VMS - 1] = 0};
61 static struct proc_dir_entry * palacios_proc_dir = NULL;
63 struct class * v3_class = NULL;
64 static struct cdev ctrl_dev;
66 static int register_vm(struct v3_guest * guest) {
69 for (i = 0; i < MAX_VMS; i++) {
70 if (guest_map[i] == NULL) {
81 static long v3_dev_ioctl(struct file * filp,
82 unsigned int ioctl, unsigned long arg) {
83 void __user * argp = (void __user *)arg;
84 DEBUG("V3 IOCTL %d\n", ioctl);
88 case V3_CREATE_GUEST:{
90 struct v3_guest_img user_image;
91 struct v3_guest * guest = palacios_alloc(sizeof(struct v3_guest));
94 ERROR("Palacios: Error allocating Kernel guest_image\n");
98 memset(guest, 0, sizeof(struct v3_guest));
100 INFO("Palacios: Creating V3 Guest...\n");
102 vm_minor = register_vm(guest);
104 if (vm_minor == -1) {
105 ERROR("Palacios Error: Too many VMs are currently running\n");
109 guest->vm_dev = MKDEV(v3_major_num, vm_minor);
111 if (copy_from_user(&user_image, argp, sizeof(struct v3_guest_img))) {
112 ERROR("Palacios Error: copy from user error getting guest image...\n");
116 guest->img_size = user_image.size;
118 DEBUG("Palacios: Allocating kernel memory for guest image (%llu bytes)\n", user_image.size);
119 guest->img = palacios_valloc(guest->img_size);
121 if (IS_ERR(guest->img)) {
122 ERROR("Palacios Error: Could not allocate space for guest image\n");
126 if (copy_from_user(guest->img, user_image.guest_data, guest->img_size)) {
127 ERROR("Palacios: Error loading guest data\n");
131 strncpy(guest->name, user_image.name, 127);
133 INIT_LIST_HEAD(&(guest->exts));
135 if (create_palacios_vm(guest) == -1) {
136 ERROR("Palacios: Error creating guest\n");
144 palacios_vfree(guest->img);
146 guest_map[vm_minor] = NULL;
148 palacios_free(guest);
154 case V3_FREE_GUEST: {
155 unsigned long vm_idx = arg;
156 struct v3_guest * guest;
158 if (vm_idx > MAX_VMS) {
159 ERROR("Invalid VM index: %ld\n", vm_idx);
163 guest = guest_map[vm_idx];
166 ERROR("No VM at index %ld\n",vm_idx);
170 INFO("Freeing VM (%s) (%p)\n", guest->name, guest);
172 if (free_palacios_vm(guest)<0) {
173 ERROR("Cannot free guest at index %ld\n",vm_idx);
177 guest_map[vm_idx] = NULL;
180 case V3_ADD_MEMORY: {
181 struct v3_mem_region mem;
183 memset(&mem, 0, sizeof(struct v3_mem_region));
185 if (copy_from_user(&mem, argp, sizeof(struct v3_mem_region))) {
186 ERROR("copy from user error getting mem_region...\n");
190 DEBUG("Adding %llu pages to Palacios memory\n", mem.num_pages);
192 if (add_palacios_memory(&mem) == -1) {
193 ERROR("Error adding memory to Palacios\n");
200 case V3_RESET_MEMORY: {
201 if (palacios_init_mm() == -1) {
202 ERROR("Error resetting Palacios memory\n");
209 struct global_ctrl * ctrl = get_global_ctrl(ioctl);
212 return ctrl->handler(ioctl, arg);
215 WARNING("\tUnhandled global ctrl cmd: %d\n", ioctl);
226 static struct file_operations v3_ctrl_fops = {
227 .owner = THIS_MODULE,
228 .unlocked_ioctl = v3_dev_ioctl,
229 .compat_ioctl = v3_dev_ioctl,
234 struct proc_dir_entry *palacios_get_procdir(void)
236 // INFO("Returning procdir=%p\n",palacios_proc_dir);
237 return palacios_proc_dir;
241 #define MAX_VCORES 256
242 #define MAX_REGIONS 1024
246 static int read_guests_details(struct seq_file *s, void *v)
250 struct v3_vm_base_state *base=0;
251 struct v3_vm_core_state *core=0;
252 struct v3_vm_mem_state *mem=0;
254 base = palacios_alloc(sizeof(struct v3_vm_base_state));
257 ERROR("No space for base state structure\n");
261 core = palacios_alloc(sizeof(struct v3_vm_core_state) + MAX_VCORES*sizeof(struct v3_vm_vcore_state));
264 ERROR("No space for core state structure\n");
268 mem = palacios_alloc(sizeof(struct v3_vm_mem_state) + MAX_REGIONS*sizeof(struct v3_vm_mem_region));
271 ERROR("No space for memory state structure\n");
275 for(i = 0; i < MAX_VMS; i++) {
276 if (guest_map[i] != NULL) {
278 "---------------------------------------------------------------------------------------\n");
282 "Device: /dev/v3-vm%d\n",
283 i,guest_map[i]->name, i);
286 core->num_vcores=MAX_VCORES; // max we can handle
287 mem->num_regions=MAX_REGIONS; // max we can handle
289 if (v3_get_state_vm(guest_map[i]->v3_ctx, base, core, mem)) {
290 ERROR("Cannot get VM info\n");
291 seq_printf(s, "<unable to get data for this VM>\n");
297 base->state==V3_VM_INVALID ? "INVALID" :
298 base->state==V3_VM_RUNNING ? "running" :
299 base->state==V3_VM_STOPPED ? "stopped" :
300 base->state==V3_VM_PAUSED ? "paused" :
301 base->state==V3_VM_ERROR ? "ERROR" :
302 base->state==V3_VM_SIMULATING ? "simulating" : "UNKNOWN",
305 seq_printf(s, "Core States\n");
307 for (j=0;j<core->num_vcores;j++) {
309 " vcore %u %s on pcore %lu %llu exits rip=0x%p %s %s %s\n",
311 core->vcore[j].state==V3_VCORE_INVALID ? "INVALID" :
312 core->vcore[j].state==V3_VCORE_RUNNING ? "running" :
313 core->vcore[j].state==V3_VCORE_STOPPED ? "stopped" : "UNKNOWN",
314 core->vcore[j].pcore,
315 core->vcore[j].num_exits,
316 core->vcore[j].last_rip,
317 core->vcore[j].cpu_mode==V3_VCORE_CPU_REAL ? "real" :
318 core->vcore[j].cpu_mode==V3_VCORE_CPU_PROTECTED ? "protected" :
319 core->vcore[j].cpu_mode==V3_VCORE_CPU_PROTECTED_PAE ? "protectedpae" :
320 core->vcore[j].cpu_mode==V3_VCORE_CPU_LONG ? "long" :
321 core->vcore[j].cpu_mode==V3_VCORE_CPU_LONG_32_COMPAT ? "long32" :
322 core->vcore[j].cpu_mode==V3_VCORE_CPU_LONG_16_COMPAT ? "long16" : "UNKNOWN",
323 core->vcore[j].mem_mode==V3_VCORE_MEM_MODE_PHYSICAL ? "physical" :
324 core->vcore[j].mem_mode==V3_VCORE_MEM_MODE_VIRTUAL ? "virtual" : "UNKNOWN",
325 core->vcore[j].mem_state==V3_VCORE_MEM_STATE_SHADOW ? "shadow" :
326 core->vcore[j].mem_state==V3_VCORE_MEM_STATE_NESTED ? "nested" : "UNKNOWN");
329 seq_printf(s, "\nMemory Regions\n");
330 for (j=0;j<mem->num_regions;j++) {
331 seq_printf(s," region %u has HPAs 0x%p-0x%p\n",
332 j, mem->region[j].host_paddr, mem->region[j].host_paddr+mem->region[j].size);
336 "---------------------------------------------------------------------------------------\n");
342 if (mem) { palacios_free(mem); }
343 if (core) { palacios_free(core); }
344 if (base) { palacios_free(base); }
349 static int read_guests(struct seq_file *s, void *v)
352 struct v3_vm_base_state *base=0;
353 struct v3_vm_core_state *core=0;
354 struct v3_vm_mem_state *mem=0;
356 base = palacios_alloc(sizeof(struct v3_vm_base_state));
359 ERROR("No space for base state structure\n");
363 core = palacios_alloc(sizeof(struct v3_vm_core_state) + MAX_VCORES*sizeof(struct v3_vm_vcore_state));
366 ERROR("No space for core state structure\n");
370 mem = palacios_alloc(sizeof(struct v3_vm_mem_state) + MAX_REGIONS*sizeof(struct v3_vm_mem_region));
373 ERROR("No space for memory state structure\n");
377 for(i = 0; i < MAX_VMS; i++) {
378 if (guest_map[i] != NULL) {
379 seq_printf(s,"%s\t/dev/v3-vm%d", guest_map[i]->name, i);
381 core->num_vcores=MAX_VCORES; // max we can handle
382 mem->num_regions=MAX_REGIONS; // max we can handle
384 if (v3_get_state_vm(guest_map[i]->v3_ctx, base, core, mem)) {
385 ERROR("Cannot get VM info\n");
386 seq_printf(s, "\t<unable to get data for this VM>\n");
388 seq_printf(s,"\t%s\t%lu vcores\t%lu regions\n",
389 base->state==V3_VM_INVALID ? "INVALID" :
390 base->state==V3_VM_RUNNING ? "running" :
391 base->state==V3_VM_STOPPED ? "stopped" :
392 base->state==V3_VM_PAUSED ? "paused" :
393 base->state==V3_VM_ERROR ? "ERROR" :
394 base->state==V3_VM_SIMULATING ? "simulating" : "UNKNOWN",
403 if (mem) { palacios_free(mem); }
404 if (core) { palacios_free(core); }
405 if (base) { palacios_free(base); }
411 static int guests_short_proc_open(struct inode * inode, struct file * filp)
413 struct proc_dir_entry * proc_entry = PDE(inode);
414 return single_open(filp, read_guests, proc_entry->data);
417 static int guests_full_proc_open(struct inode * inode, struct file * filp)
419 struct proc_dir_entry * proc_entry = PDE(inode);
420 return single_open(filp, read_guests_details, proc_entry->data);
425 static struct file_operations guest_full_proc_ops = {
426 .owner = THIS_MODULE,
427 .open = guests_full_proc_open,
430 .release = single_release,
433 static struct file_operations guest_short_proc_ops = {
434 .owner = THIS_MODULE,
435 .open = guests_short_proc_open,
438 .release = single_release,
442 static int __init v3_init(void) {
444 dev_t dev = MKDEV(0, 0); // We dynamicallly assign the major number
450 palacios_proc_dir = proc_mkdir("v3vee", NULL);
451 if (!palacios_proc_dir) {
452 ERROR("Could not create proc entry\n");
457 // this will populate the v3vee tree...
458 if (palacios_init_mm()) {
463 palacios_allow_devmem();
466 // Initialize Palacios
467 palacios_vmm_init(options);
469 // initialize extensions
470 init_lnx_extensions();
473 v3_class = class_create(THIS_MODULE, "vms");
474 if (IS_ERR(v3_class)) {
475 ERROR("Failed to register V3 VM device class\n");
476 ret = PTR_ERR(v3_class);
480 INFO("intializing V3 Control device\n");
482 ret = alloc_chrdev_region(&dev, 0, MAX_VMS + 1, "v3vee");
485 ERROR("Error registering device region for V3 devices\n");
489 v3_major_num = MAJOR(dev);
491 dev = MKDEV(v3_major_num, MAX_VMS + 1);
494 DEBUG("Creating V3 Control device: Major %d, Minor %d\n", v3_major_num, MINOR(dev));
495 cdev_init(&ctrl_dev, &v3_ctrl_fops);
496 ctrl_dev.owner = THIS_MODULE;
497 ctrl_dev.ops = &v3_ctrl_fops;
498 cdev_add(&ctrl_dev, dev, 1);
500 device_create(v3_class, NULL, dev, NULL, "v3vee");
503 ERROR("Error adding v3 control device\n");
508 struct proc_dir_entry *entry;
510 entry = create_proc_entry("v3-guests", 0444, palacios_proc_dir);
512 entry->proc_fops = &guest_short_proc_ops;
513 INFO("/proc/v3vee/v3-guests successfully created\n");
515 ERROR("Could not create proc entry\n");
518 entry = create_proc_entry("v3-guests-details", 0444, palacios_proc_dir);
520 entry->proc_fops = &guest_full_proc_ops;
521 INFO("/proc/v3vee/v3-guests-details successfully created\n");
523 ERROR("Could not create proc entry\n");
531 remove_proc_entry("v3-guests-details", palacios_proc_dir);
533 remove_proc_entry("v3-guests", palacios_proc_dir);
535 unregister_chrdev_region(MKDEV(v3_major_num, 0), MAX_VMS + 1);
537 class_destroy(v3_class);
540 palacios_restore_devmem();
542 palacios_deinit_mm();
544 remove_proc_entry("v3vee", NULL);
553 static void __exit v3_exit(void) {
554 extern u32 pg_allocs;
561 struct v3_guest * guest;
565 /* Stop and free any running VMs */
566 for (i = 0; i < MAX_VMS; i++) {
567 if (guest_map[i] != NULL) {
568 guest = (struct v3_guest *)guest_map[i];
570 if (v3_stop_vm(guest->v3_ctx) < 0)
571 ERROR("Couldn't stop VM %d\n", i);
573 free_palacios_vm(guest);
578 dev = MKDEV(v3_major_num, MAX_VMS + 1);
580 INFO("Removing V3 Control device\n");
585 DEBUG("Palacios Mallocs = %d, Frees = %d\n", mallocs, frees);
586 DEBUG("Palacios Vmallocs = %d, Vfrees = %d\n", vmallocs, vfrees);
587 DEBUG("Palacios Page Allocs = %d, Page Frees = %d\n", pg_allocs, pg_frees);
589 unregister_chrdev_region(MKDEV(v3_major_num, 0), MAX_VMS + 1);
593 device_destroy(v3_class, dev);
594 class_destroy(v3_class);
597 deinit_lnx_extensions();
600 palacios_restore_devmem();
603 palacios_deinit_mm();
605 remove_proc_entry("v3-guests-details", palacios_proc_dir);
606 remove_proc_entry("v3-guests", palacios_proc_dir);
607 remove_proc_entry("v3vee", NULL);
609 DEBUG("Palacios Module Mallocs = %d, Frees = %d\n", mod_allocs, mod_frees);
617 module_init(v3_init);
618 module_exit(v3_exit);
622 void * trace_malloc(size_t size, gfp_t flags) {
626 addr = palacios_alloc_extended(size, flags, -1);
632 void trace_free(const void * objp) {
634 palacios_free((void*)objp);