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_instrument.h>
25 #include <palacios/vmm_ctrl_regs.h>
26 #include <palacios/vmm_lowlevel.h>
27 #include <palacios/vmm_sprintf.h>
30 #include <palacios/svm.h>
33 #include <palacios/vmx.h>
37 #include <palacios/vmm_vnet.h>
41 v3_cpu_arch_t v3_cpu_types[CONFIG_MAX_CPUS];
42 struct v3_os_hooks * os_hooks = NULL;
44 int v3_dbg_enable = 0;
48 static void init_cpu(void * arg) {
49 uint32_t cpu_id = (uint32_t)(addr_t)arg;
52 if (v3_is_svm_capable()) {
53 PrintDebug("Machine is SVM Capable\n");
54 v3_init_svm_cpu(cpu_id);
59 if (v3_is_vmx_capable()) {
60 PrintDebug("Machine is VMX Capable\n");
61 v3_init_vmx_cpu(cpu_id);
66 PrintError("CPU has no virtualizationExtensions\n");
72 void Init_V3(struct v3_os_hooks * hooks, int num_cpus) {
75 V3_Print("V3 Print statement to fix a Kitten page fault bug\n");
77 // Set global variables.
80 for (i = 0; i < CONFIG_MAX_CPUS; i++) {
81 v3_cpu_types[i] = V3_INVALID_CPU;
84 // Register all the possible device types
87 // Register all shadow paging handlers
88 V3_init_shdw_paging();
95 #ifdef CONFIG_INSTRUMENT_VMM
96 v3_init_instrumentation();
105 #ifdef CONFIG_MULTITHREAD_OS
106 if ((hooks) && (hooks->call_on_cpu)) {
108 for (i = 0; i < num_cpus; i++) {
110 V3_Print("Initializing VMM extensions on cpu %d\n", i);
111 hooks->call_on_cpu(i, &init_cpu, (void *)(addr_t)i);
121 v3_cpu_arch_t v3_get_cpu_type(int cpu_id) {
122 return v3_cpu_types[cpu_id];
126 struct v3_vm_info * v3_create_vm(void * cfg, void * priv_data, char * name) {
127 struct v3_vm_info * vm = v3_config_guest(cfg, priv_data);
129 V3_Print("CORE 0 RIP=%p\n", (void *)(addr_t)(vm->cores[0].rip));
133 PrintError("Could not configure guest\n");
139 } else if (strlen(name) >= 128) {
140 PrintError("VM name is too long. Will be truncated to 128 chars.\n");
143 memset(vm->name, 0, 128);
144 strncpy(vm->name, name, 127);
150 static int start_core(void * p)
152 struct guest_info * core = (struct guest_info *)p;
155 PrintDebug("core %u: in start_core (RIP=%p)\n",
156 core->cpu_id, (void *)(addr_t)core->rip);
159 // JRL: Whoa WTF? cpu_types are tied to the vcoreID????
160 switch (v3_cpu_types[core->cpu_id]) {
163 case V3_SVM_REV3_CPU:
164 return v3_start_svm_guest(core);
170 return v3_start_vmx_guest(core);
174 PrintError("Attempting to enter a guest on an invalid CPU\n");
182 // For the moment very ugly. Eventually we will shift the cpu_mask to an arbitrary sized type...
186 int v3_start_vm(struct v3_vm_info * vm, unsigned int cpu_mask) {
189 uint8_t * core_mask = (uint8_t *)&cpu_mask; // This is to make future expansion easier
190 uint32_t avail_cores = 0;
194 /// CHECK IF WE ARE MULTICORE ENABLED....
196 V3_Print("V3 -- Starting VM (%u cores)\n", vm->num_cores);
197 V3_Print("CORE 0 RIP=%p\n", (void *)(addr_t)(vm->cores[0].rip));
199 // Check that enough cores are present in the mask to handle vcores
200 for (i = 0; i < MAX_CORES; i++) {
204 if (core_mask[major] & (0x1 << minor)) {
210 if (vm->num_cores > avail_cores) {
211 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);
216 // spawn off new threads, for other cores
217 for (i = 0, vcore_id = 1; (i < MAX_CORES) && (vcore_id < vm->num_cores); i++) {
220 void * core_thread = NULL;
221 struct guest_info * core = &(vm->cores[vcore_id]);
223 if (i == V3_Get_CPU()) {
224 // We skip the local CPU, because it is reserved for vcore 0
229 if ((core_mask[major] & (0x1 << minor)) == 0) {
230 // cpuid not set in cpu_mask
234 PrintDebug("Starting virtual core %u on logical core %u\n",
237 sprintf(core->exec_name, "%s-%u", vm->name, vcore_id);
239 PrintDebug("run: core=%u, func=0x%p, arg=0x%p, name=%s\n",
240 i, start_core, core, core->exec_name);
242 // TODO: actually manage these threads instead of just launching them
243 core_thread = V3_CREATE_THREAD_ON_CPU(i, start_core, core, core->exec_name);
245 if (core_thread == NULL) {
246 PrintError("Thread launch failed\n");
253 sprintf(vm->cores[0].exec_name, "%s", vm->name);
255 if (start_core(&(vm->cores[0])) != 0) {
256 PrintError("Error starting VM core 0\n");
268 int v3_stop_vm(struct v3_vm_info * vm) {
270 vm->run_state = VM_STOPPED;
272 // force exit all cores via a cross call/IPI
277 int still_running = 0;
279 for (i = 0; i < vm->num_cores; i++) {
280 if (vm->cores[i].core_run_state != CORE_STOPPED) {
285 if (still_running == 0) {
289 V3_Print("Yielding\n");
294 V3_Print("VM stopped. Returning\n");
300 int v3_free_vm(struct v3_vm_info * vm) {
301 // deinitialize guest (free memory, etc...)
303 v3_dev_mgr_deinit(vm);
311 v3_cpu_mode_t v3_get_host_cpu_mode() {
321 cr4 = (struct cr4_32 *)&(cr4_val);
324 return PROTECTED_PAE;
332 v3_cpu_mode_t v3_get_host_cpu_mode() {
339 #define V3_Yield(addr) \
341 extern struct v3_os_hooks * os_hooks; \
342 if ((os_hooks) && (os_hooks)->yield_cpu) { \
343 (os_hooks)->yield_cpu(); \
349 void v3_yield_cond(struct guest_info * info) {
351 cur_cycle = v3_get_host_time(&info->time_state);
353 if (cur_cycle > (info->yield_start_cycle + info->vm_info->yield_cycle_period)) {
356 PrintDebug("Conditional Yield (cur_cyle=%p, start_cycle=%p, period=%p)\n",
357 (void *)cur_cycle, (void *)info->yield_start_cycle, (void *)info->yield_cycle_period);
360 info->yield_start_cycle = v3_get_host_time(&info->time_state);
366 * unconditional cpu yield
367 * if the yielding thread is a guest context, the guest quantum is reset on resumption
368 * Non guest context threads should call this function with a NULL argument
370 void v3_yield(struct guest_info * info) {
374 info->yield_start_cycle = v3_get_host_time(&info->time_state);
381 void v3_print_cond(const char * fmt, ...) {
382 if (v3_dbg_enable == 1) {
387 vsnprintf(buf, 2048, fmt, ap);
395 #ifdef CONFIG_MULTITHREAD_OS
397 void v3_interrupt_cpu(struct v3_vm_info * vm, int logical_cpu, int vector) {
398 extern struct v3_os_hooks * os_hooks;
400 if ((os_hooks) && (os_hooks)->interrupt_cpu) {
401 (os_hooks)->interrupt_cpu(vm, logical_cpu, vector);
408 int v3_vm_enter(struct guest_info * info) {
409 switch (v3_cpu_types[info->cpu_id]) {
412 case V3_SVM_REV3_CPU:
413 return v3_svm_enter(info);
419 return v3_vmx_enter(info);
423 PrintError("Attemping to enter a guest on an invalid CPU\n");