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>
29 #include <palacios/svm.h>
32 #include <palacios/vmx.h>
36 #include <palacios/vmm_vnet.h>
40 v3_cpu_arch_t v3_cpu_types[CONFIG_MAX_CPUS];
41 struct v3_os_hooks * os_hooks = NULL;
42 int v3_dbg_enable = 0;
46 static void init_cpu(void * arg) {
47 uint32_t cpu_id = (uint32_t)(addr_t)arg;
50 if (v3_is_svm_capable()) {
51 PrintDebug("Machine is SVM Capable\n");
52 v3_init_svm_cpu(cpu_id);
57 if (v3_is_vmx_capable()) {
58 PrintDebug("Machine is VMX Capable\n");
59 v3_init_vmx_cpu(cpu_id);
64 PrintError("CPU has no virtualization Extensions\n");
69 static void deinit_cpu(void * arg) {
70 uint32_t cpu_id = (uint32_t)(addr_t)arg;
73 switch (v3_cpu_types[cpu_id]) {
77 PrintDebug("Machine is SVM Capable\n");
78 v3_deinit_svm_cpu(cpu_id);
84 PrintDebug("Machine is VMX Capable\n");
85 v3_deinit_vmx_cpu(cpu_id);
90 PrintError("CPU has no virtualization Extensions\n");
97 void Init_V3(struct v3_os_hooks * hooks, int num_cpus) {
100 V3_Print("V3 Print statement to fix a Kitten page fault bug\n");
102 // Set global variables.
105 for (i = 0; i < CONFIG_MAX_CPUS; i++) {
106 v3_cpu_types[i] = V3_INVALID_CPU;
109 // Register all the possible device types
112 // Register all shadow paging handlers
113 V3_init_shdw_paging();
126 #ifdef CONFIG_MULTITHREAD_OS
127 if ((hooks) && (hooks->call_on_cpu)) {
129 for (i = 0; i < num_cpus; i++) {
131 V3_Print("Initializing VMM extensions on cpu %d\n", i);
132 hooks->call_on_cpu(i, &init_cpu, (void *)(addr_t)i);
146 V3_deinit_shdw_paging();
157 #ifdef CONFIG_MULTITHREAD_OS
158 if ((os_hooks) && (os_hooks->call_on_cpu)) {
159 for (i = 0; i < CONFIG_MAX_CPUS; i++) {
160 if (v3_cpu_types[i] != V3_INVALID_CPU) {
161 deinit_cpu((void *)(addr_t)i);
172 v3_cpu_arch_t v3_get_cpu_type(int cpu_id) {
173 return v3_cpu_types[cpu_id];
177 struct v3_vm_info * v3_create_vm(void * cfg, void * priv_data, char * name) {
178 struct v3_vm_info * vm = v3_config_guest(cfg, priv_data);
180 V3_Print("CORE 0 RIP=%p\n", (void *)(addr_t)(vm->cores[0].rip));
184 PrintError("Could not configure guest\n");
190 } else if (strlen(name) >= 128) {
191 PrintError("VM name is too long. Will be truncated to 128 chars.\n");
194 memset(vm->name, 0, 128);
195 strncpy(vm->name, name, 127);
201 static int start_core(void * p)
203 struct guest_info * core = (struct guest_info *)p;
206 PrintDebug("virtual core %u: in start_core (RIP=%p)\n",
207 core->cpu_id, (void *)(addr_t)core->rip);
209 switch (v3_cpu_types[0]) {
212 case V3_SVM_REV3_CPU:
213 return v3_start_svm_guest(core);
219 return v3_start_vmx_guest(core);
223 PrintError("Attempting to enter a guest on an invalid CPU\n");
231 // For the moment very ugly. Eventually we will shift the cpu_mask to an arbitrary sized type...
232 #ifdef CONFIG_MULTITHREAD_OS
239 int v3_start_vm(struct v3_vm_info * vm, unsigned int cpu_mask) {
241 uint8_t * core_mask = (uint8_t *)&cpu_mask; // This is to make future expansion easier
242 uint32_t avail_cores = 0;
245 /// CHECK IF WE ARE MULTICORE ENABLED....
247 V3_Print("V3 -- Starting VM (%u cores)\n", vm->num_cores);
248 V3_Print("CORE 0 RIP=%p\n", (void *)(addr_t)(vm->cores[0].rip));
251 // Check that enough cores are present in the mask to handle vcores
252 for (i = 0; i < MAX_CORES; i++) {
256 if (core_mask[major] & (0x1 << minor)) {
262 if (vm->num_cores > avail_cores) {
263 PrintError("Attempted to start a VM with too many cores (vm->num_cores = %d, avail_cores = %d, MAX=%d)\n", vm->num_cores, avail_cores, MAX_CORES);
267 #ifdef CONFIG_MULTITHREAD_OS
268 // spawn off new threads, for other cores
269 for (i = 0, vcore_id = 1; (i < MAX_CORES) && (vcore_id < vm->num_cores); i++) {
272 void * core_thread = NULL;
273 struct guest_info * core = &(vm->cores[vcore_id]);
275 /* This assumes that the core 0 thread has been mapped to physical core 0 */
276 if (i == V3_Get_CPU()) {
277 // We skip the local CPU because it is reserved for vcore 0
281 if ((core_mask[major] & (0x1 << minor)) == 0) {
282 PrintError("Logical CPU %d not available for virtual core %d; not started\n",
287 PrintDebug("Starting virtual core %u on logical core %u\n",
290 sprintf(core->exec_name, "%s-%u", vm->name, vcore_id);
292 PrintDebug("run: core=%u, func=0x%p, arg=0x%p, name=%s\n",
293 i, start_core, core, core->exec_name);
295 // TODO: actually manage these threads instead of just launching them
296 core_thread = V3_CREATE_THREAD_ON_CPU(i, start_core, core, core->exec_name);
298 if (core_thread == NULL) {
299 PrintError("Thread launch failed\n");
307 sprintf(vm->cores[0].exec_name, "%s", vm->name);
309 if (start_core(&(vm->cores[0])) != 0) {
310 PrintError("Error starting VM core 0\n");
322 int v3_stop_vm(struct v3_vm_info * vm) {
324 vm->run_state = VM_STOPPED;
326 // force exit all cores via a cross call/IPI
330 int still_running = 0;
332 for (i = 0; i < vm->num_cores; i++) {
333 if (vm->cores[i].core_run_state != CORE_STOPPED) {
338 if (still_running == 0) {
342 V3_Print("Yielding\n");
347 V3_Print("VM stopped. Returning\n");
353 int v3_free_vm(struct v3_vm_info * vm) {
355 // deinitialize guest (free memory, etc...)
357 v3_free_vm_devices(vm);
360 for (i = 0; i < vm->num_cores; i++) {
361 v3_free_core(&(vm->cores[i]));
365 v3_free_vm_internal(vm);
377 v3_cpu_mode_t v3_get_host_cpu_mode() {
387 cr4 = (struct cr4_32 *)&(cr4_val);
390 return PROTECTED_PAE;
398 v3_cpu_mode_t v3_get_host_cpu_mode() {
405 #define V3_Yield(addr) \
407 extern struct v3_os_hooks * os_hooks; \
408 if ((os_hooks) && (os_hooks)->yield_cpu) { \
409 (os_hooks)->yield_cpu(); \
415 void v3_yield_cond(struct guest_info * info) {
417 cur_cycle = v3_get_host_time(&info->time_state);
419 if (cur_cycle > (info->yield_start_cycle + info->vm_info->yield_cycle_period)) {
422 PrintDebug("Conditional Yield (cur_cyle=%p, start_cycle=%p, period=%p)\n",
423 (void *)cur_cycle, (void *)info->yield_start_cycle, (void *)info->yield_cycle_period);
426 info->yield_start_cycle = v3_get_host_time(&info->time_state);
432 * unconditional cpu yield
433 * if the yielding thread is a guest context, the guest quantum is reset on resumption
434 * Non guest context threads should call this function with a NULL argument
436 void v3_yield(struct guest_info * info) {
440 info->yield_start_cycle = v3_get_host_time(&info->time_state);
447 void v3_print_cond(const char * fmt, ...) {
448 if (v3_dbg_enable == 1) {
453 vsnprintf(buf, 2048, fmt, ap);
461 #ifdef CONFIG_MULTITHREAD_OS
463 void v3_interrupt_cpu(struct v3_vm_info * vm, int logical_cpu, int vector) {
464 extern struct v3_os_hooks * os_hooks;
466 if ((os_hooks) && (os_hooks)->interrupt_cpu) {
467 (os_hooks)->interrupt_cpu(vm, logical_cpu, vector);
474 int v3_vm_enter(struct guest_info * info) {
475 switch (v3_cpu_types[0]) {
478 case V3_SVM_REV3_CPU:
479 return v3_svm_enter(info);
485 return v3_vmx_enter(info);
489 PrintError("Attemping to enter a guest on an invalid CPU\n");