2 * This file is part of the Palacios Virtual Machine Monitor developed
3 * by the V3VEE Project with funding from the United States National
4 * Science Foundation and the Department of Energy.
6 * The V3VEE Project is a joint project between Northwestern University
7 * and the University of New Mexico. You can find out more at
10 * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
11 * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
12 * All rights reserved.
14 * Author: Jack Lange <jarusl@cs.northwestern.edu>
16 * This is free software. You are permitted to use,
17 * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
20 #include <palacios/vmm.h>
21 #include <palacios/vmm_intr.h>
22 #include <palacios/vmm_config.h>
23 #include <palacios/vm_guest.h>
24 #include <palacios/vmm_ctrl_regs.h>
25 #include <palacios/vmm_lowlevel.h>
26 #include <palacios/vmm_sprintf.h>
27 #include <palacios/vmm_extensions.h>
30 #include <palacios/svm.h>
33 #include <palacios/vmx.h>
37 v3_cpu_arch_t v3_cpu_types[V3_CONFIG_MAX_CPUS];
38 struct v3_os_hooks * os_hooks = NULL;
39 int v3_dbg_enable = 0;
44 static void init_cpu(void * arg) {
45 uint32_t cpu_id = (uint32_t)(addr_t)arg;
48 if (v3_is_svm_capable()) {
49 PrintDebug("Machine is SVM Capable\n");
50 v3_init_svm_cpu(cpu_id);
55 if (v3_is_vmx_capable()) {
56 PrintDebug("Machine is VMX Capable\n");
57 v3_init_vmx_cpu(cpu_id);
62 PrintError("CPU has no virtualization Extensions\n");
67 static void deinit_cpu(void * arg) {
68 uint32_t cpu_id = (uint32_t)(addr_t)arg;
71 switch (v3_cpu_types[cpu_id]) {
75 PrintDebug("Deinitializing SVM CPU %d\n", cpu_id);
76 v3_deinit_svm_cpu(cpu_id);
82 case V3_VMX_EPT_UG_CPU:
83 PrintDebug("Deinitializing VMX CPU %d\n", cpu_id);
84 v3_deinit_vmx_cpu(cpu_id);
89 PrintError("CPU has no virtualization Extensions\n");
96 void Init_V3(struct v3_os_hooks * hooks, int num_cpus) {
99 V3_Print("V3 Print statement to fix a Kitten page fault bug\n");
101 // Set global variables.
104 for (i = 0; i < V3_CONFIG_MAX_CPUS; i++) {
105 v3_cpu_types[i] = V3_INVALID_CPU;
108 // Register all the possible device types
111 // Register all shadow paging handlers
112 V3_init_shdw_paging();
114 // Register all extensions
115 V3_init_extensions();
118 #ifdef V3_CONFIG_SYMMOD
124 #ifdef V3_CONFIG_MULTITHREAD_OS
125 if ((hooks) && (hooks->call_on_cpu)) {
127 for (i = 0; i < num_cpus; i++) {
129 V3_Print("Initializing VMM extensions on cpu %d\n", i);
130 hooks->call_on_cpu(i, &init_cpu, (void *)(addr_t)i);
144 V3_deinit_shdw_paging();
146 V3_deinit_extensions();
148 #ifdef V3_CONFIG_SYMMOD
153 #ifdef V3_CONFIG_MULTITHREAD_OS
154 if ((os_hooks) && (os_hooks->call_on_cpu)) {
155 for (i = 0; i < V3_CONFIG_MAX_CPUS; i++) {
156 if (v3_cpu_types[i] != V3_INVALID_CPU) {
157 deinit_cpu((void *)(addr_t)i);
168 v3_cpu_arch_t v3_get_cpu_type(int cpu_id) {
169 return v3_cpu_types[cpu_id];
173 struct v3_vm_info * v3_create_vm(void * cfg, void * priv_data, char * name) {
174 struct v3_vm_info * vm = v3_config_guest(cfg, priv_data);
177 PrintError("Could not configure guest\n");
181 V3_Print("CORE 0 RIP=%p\n", (void *)(addr_t)(vm->cores[0].rip));
185 } else if (strlen(name) >= 128) {
186 PrintError("VM name is too long. Will be truncated to 128 chars.\n");
189 memset(vm->name, 0, 128);
190 strncpy(vm->name, name, 127);
198 static int start_core(void * p)
200 struct guest_info * core = (struct guest_info *)p;
203 PrintDebug("virtual core %u (on logical core %u): in start_core (RIP=%p)\n",
204 core->vcpu_id, core->pcpu_id, (void *)(addr_t)core->rip);
206 switch (v3_cpu_types[0]) {
209 case V3_SVM_REV3_CPU:
210 return v3_start_svm_guest(core);
216 case V3_VMX_EPT_UG_CPU:
217 return v3_start_vmx_guest(core);
221 PrintError("Attempting to enter a guest on an invalid CPU\n");
229 // For the moment very ugly. Eventually we will shift the cpu_mask to an arbitrary sized type...
230 #ifdef V3_CONFIG_MULTITHREAD_OS
237 int v3_start_vm(struct v3_vm_info * vm, unsigned int cpu_mask) {
239 uint8_t * core_mask = (uint8_t *)&cpu_mask; // This is to make future expansion easier
240 uint32_t avail_cores = 0;
243 /// CHECK IF WE ARE MULTICORE ENABLED....
245 V3_Print("V3 -- Starting VM (%u cores)\n", vm->num_cores);
246 V3_Print("CORE 0 RIP=%p\n", (void *)(addr_t)(vm->cores[0].rip));
249 // Check that enough cores are present in the mask to handle vcores
250 for (i = 0; i < MAX_CORES; i++) {
254 if (core_mask[major] & (0x1 << minor)) {
260 if (vm->num_cores > avail_cores) {
261 PrintError("Attempted to start a VM with too many cores (vm->num_cores = %d, avail_cores = %d, MAX=%d)\n",
262 vm->num_cores, avail_cores, MAX_CORES);
266 #ifdef V3_CONFIG_MULTITHREAD_OS
267 // spawn off new threads, for other cores
268 for (i = 0, vcore_id = 1; (i < MAX_CORES) && (vcore_id < vm->num_cores); i++) {
271 struct guest_info * core = &(vm->cores[vcore_id]);
272 char * specified_cpu = v3_cfg_val(core->core_cfg_data, "target_cpu");
273 uint32_t core_idx = 0;
275 if (specified_cpu != NULL) {
276 core_idx = atoi(specified_cpu);
278 if ((core_idx < 0) || (core_idx >= MAX_CORES)) {
279 PrintError("Target CPU out of bounds (%d) (MAX_CORES=%d)\n", core_idx, MAX_CORES);
282 i--; // We reset the logical core idx. Not strictly necessary I guess...
285 if (i == V3_Get_CPU()) {
286 // We skip the local CPU because it is reserved for vcore 0
293 major = core_idx / 8;
294 minor = core_idx % 8;
297 if ((core_mask[major] & (0x1 << minor)) == 0) {
298 PrintError("Logical CPU %d not available for virtual core %d; not started\n",
301 if (specified_cpu != NULL) {
302 PrintError("CPU was specified explicitly (%d). HARD ERROR\n", core_idx);
310 PrintDebug("Starting virtual core %u on logical core %u\n",
313 sprintf(core->exec_name, "%s-%u", vm->name, vcore_id);
315 PrintDebug("run: core=%u, func=0x%p, arg=0x%p, name=%s\n",
316 core_idx, start_core, core, core->exec_name);
318 // TODO: actually manage these threads instead of just launching them
319 core->pcpu_id = core_idx;
320 core->core_thread = V3_CREATE_THREAD_ON_CPU(core_idx, start_core, core, core->exec_name);
322 if (core->core_thread == NULL) {
323 PrintError("Thread launch failed\n");
332 sprintf(vm->cores[0].exec_name, "%s", vm->name);
334 vm->cores[0].pcpu_id = V3_Get_CPU();
336 if (start_core(&(vm->cores[0])) != 0) {
337 PrintError("Error starting VM core 0\n");
348 int v3_reset_vm_core(struct guest_info * core, addr_t rip) {
350 switch (v3_cpu_types[core->pcpu_id]) {
353 case V3_SVM_REV3_CPU:
354 PrintDebug("Resetting SVM Guest CPU %d\n", core->vcpu_id);
355 return v3_reset_svm_vm_core(core, rip);
360 case V3_VMX_EPT_UG_CPU:
361 PrintDebug("Resetting VMX Guest CPU %d\n", core->vcpu_id);
362 return v3_reset_vmx_vm_core(core, rip);
366 PrintError("CPU has no virtualization Extensions\n");
375 /* move a virtual core to different physical core */
376 int v3_move_vm_core(struct v3_vm_info * vm, int vcore_id, int target_cpu) {
377 struct guest_info * core = NULL;
379 if(vcore_id < 0 || vcore_id > vm->num_cores) {
383 core = &(vm->cores[vcore_id]);
385 if(target_cpu != core->pcpu_id &&
386 core->core_move_state != CORE_MOVE_PENDING){
387 core->core_move_state = CORE_MOVE_PENDING;
388 core->target_pcpu_id = target_cpu;
389 v3_interrupt_cpu(vm, core->pcpu_id, 0);
391 while(core->core_move_state != CORE_MOVE_DONE){
402 int v3_stop_vm(struct v3_vm_info * vm) {
404 vm->run_state = VM_STOPPED;
406 // force exit all cores via a cross call/IPI
410 int still_running = 0;
412 for (i = 0; i < vm->num_cores; i++) {
413 if (vm->cores[i].core_run_state != CORE_STOPPED) {
418 if (still_running == 0) {
425 V3_Print("VM stopped. Returning\n");
431 int v3_pause_vm(struct v3_vm_info * vm) {
433 if (vm->run_state != VM_RUNNING) {
434 PrintError("Tried to pause a VM that was not running\n");
438 while (v3_raise_barrier(vm, NULL) == -1);
440 vm->run_state = VM_PAUSED;
446 int v3_continue_vm(struct v3_vm_info * vm) {
448 if (vm->run_state != VM_PAUSED) {
449 PrintError("Tried to continue a VM that was not paused\n");
453 v3_lower_barrier(vm);
455 vm->run_state = VM_RUNNING;
461 int v3_free_vm(struct v3_vm_info * vm) {
463 // deinitialize guest (free memory, etc...)
465 v3_free_vm_devices(vm);
468 for (i = 0; i < vm->num_cores; i++) {
469 v3_free_core(&(vm->cores[i]));
473 v3_free_vm_internal(vm);
485 v3_cpu_mode_t v3_get_host_cpu_mode() {
495 cr4 = (struct cr4_32 *)&(cr4_val);
498 return PROTECTED_PAE;
506 v3_cpu_mode_t v3_get_host_cpu_mode() {
513 #define V3_Yield(addr) \
515 extern struct v3_os_hooks * os_hooks; \
516 if ((os_hooks) && (os_hooks)->yield_cpu) { \
517 (os_hooks)->yield_cpu(); \
523 void v3_yield_cond(struct guest_info * info) {
525 cur_cycle = v3_get_host_time(&info->time_state);
527 if (cur_cycle > (info->yield_start_cycle + info->vm_info->yield_cycle_period)) {
530 PrintDebug("Conditional Yield (cur_cyle=%p, start_cycle=%p, period=%p)\n",
531 (void *)cur_cycle, (void *)info->yield_start_cycle, (void *)info->yield_cycle_period);
534 info->yield_start_cycle = v3_get_host_time(&info->time_state);
540 * unconditional cpu yield
541 * if the yielding thread is a guest context, the guest quantum is reset on resumption
542 * Non guest context threads should call this function with a NULL argument
544 void v3_yield(struct guest_info * info) {
548 info->yield_start_cycle = v3_get_host_time(&info->time_state);
555 void v3_print_cond(const char * fmt, ...) {
556 if (v3_dbg_enable == 1) {
561 vsnprintf(buf, 2048, fmt, ap);
569 #ifdef V3_CONFIG_MULTITHREAD_OS
571 void v3_interrupt_cpu(struct v3_vm_info * vm, int logical_cpu, int vector) {
572 extern struct v3_os_hooks * os_hooks;
574 if ((os_hooks) && (os_hooks)->interrupt_cpu) {
575 (os_hooks)->interrupt_cpu(vm, logical_cpu, vector);
582 int v3_vm_enter(struct guest_info * info) {
583 switch (v3_cpu_types[0]) {
586 case V3_SVM_REV3_CPU:
587 return v3_svm_enter(info);
593 case V3_VMX_EPT_UG_CPU:
594 return v3_vmx_enter(info);
598 PrintError("Attemping to enter a guest on an invalid CPU\n");