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();
104 if ((hooks) && (hooks->call_on_cpu)) {
106 for (i = 0; i < num_cpus; i++) {
108 V3_Print("Initializing VMM extensions on cpu %d\n", i);
109 hooks->call_on_cpu(i, &init_cpu, (void *)(addr_t)i);
115 v3_cpu_arch_t v3_get_cpu_type(int cpu_id) {
116 return v3_cpu_types[cpu_id];
120 struct v3_vm_info * v3_create_vm(void * cfg) {
121 struct v3_vm_info * vm = v3_config_guest(cfg);
124 PrintError("Could not configure guest\n");
132 static int start_core(void *p)
134 struct guest_info * info = (struct guest_info*)p;
137 PrintDebug("core %u: in start_core\n",info->cpu_id);
139 // we assume here that the APs are in INIT mode
140 // and only the BSP is in REAL
141 // the per-architecture code will rely on this
145 switch (v3_cpu_types[info->cpu_id]) {
148 case V3_SVM_REV3_CPU:
149 return v3_start_svm_guest(info);
155 return v3_start_vmx_guest(info);
159 PrintError("Attempting to enter a guest on an invalid CPU\n");
167 static uint32_t get_next_core(unsigned int cpu_mask, uint32_t last_proc)
169 uint32_t proc_to_use;
171 PrintDebug("In get_next_core cpu_mask=0x%x last_proc=%u\n",cpu_mask,last_proc);
173 proc_to_use=(last_proc+1) % 32; // only 32 procs
174 // This will wrap around, and eventually we can use proc 0,
175 // since that's clearly available
176 while (!((cpu_mask >> proc_to_use)&0x1)) {
177 proc_to_use=(proc_to_use+1)%32;
182 int v3_start_vm(struct v3_vm_info * vm, unsigned int cpu_mask) {
185 uint32_t proc_to_use;
188 V3_Print("V3 -- Starting VM (%u cores)\n",vm->num_cores);
190 // We assume that we are running on CPU 0 of the underlying system
193 // We will fork off cores 1..n first, then boot core zero
195 // for the AP, we need to create threads
197 for (i = 1; i < vm->num_cores; i++) {
198 if (!os_hooks->start_thread_on_cpu) {
199 PrintError("Host OS does not support start_thread_on_cpu - FAILING\n");
203 proc_to_use=get_next_core(cpu_mask,last_proc);
204 last_proc=proc_to_use;
206 // vm->cores[i].cpu_id=i;
207 // vm->cores[i].physical_cpu_id=proc_to_use;
209 PrintDebug("Starting virtual core %u on logical core %u\n",i,proc_to_use);
211 sprintf(tname,"core%u",i);
213 PrintDebug("run: core=%u, func=0x%p, arg=0x%p, name=%s\n",
214 proc_to_use, start_core, &(vm->cores[i]), tname);
216 // TODO: actually manage these threads instead of just launching them
217 if (!(os_hooks->start_thread_on_cpu(proc_to_use,start_core,&(vm->cores[i]),tname))) {
218 PrintError("Thread launch failed\n");
223 // vm->cores[0].cpu_id=0;
224 // vm->cores[0].physical_cpu_id=0;
226 // Finally launch the BSP on core 0
227 sprintf(tname,"core%u",0);
228 if (!os_hooks->start_thread_on_cpu(0,start_core,&(vm->cores[0]),tname)) {
229 PrintError("Thread launch failed\n");
240 v3_cpu_mode_t v3_get_host_cpu_mode() {
250 cr4 = (struct cr4_32 *)&(cr4_val);
253 return PROTECTED_PAE;
261 v3_cpu_mode_t v3_get_host_cpu_mode() {
268 #define V3_Yield(addr) \
270 extern struct v3_os_hooks * os_hooks; \
271 if ((os_hooks) && (os_hooks)->yield_cpu) { \
272 (os_hooks)->yield_cpu(); \
278 void v3_yield_cond(struct guest_info * info) {
282 if (cur_cycle > (info->yield_start_cycle + info->vm_info->yield_cycle_period)) {
285 PrintDebug("Conditional Yield (cur_cyle=%p, start_cycle=%p, period=%p)\n",
286 (void *)cur_cycle, (void *)info->yield_start_cycle, (void *)info->yield_cycle_period);
289 rdtscll(info->yield_start_cycle);
295 * unconditional cpu yield
296 * if the yielding thread is a guest context, the guest quantum is reset on resumption
297 * Non guest context threads should call this function with a NULL argument
299 void v3_yield(struct guest_info * info) {
303 rdtscll(info->yield_start_cycle);
310 void v3_print_cond(const char * fmt, ...) {
311 if (v3_dbg_enable == 1) {
316 vsnprintf(buf, 2048, fmt, ap);
326 void v3_interrupt_cpu(struct v3_vm_info * vm, int logical_cpu, int vector) {
327 extern struct v3_os_hooks * os_hooks;
329 if ((os_hooks) && (os_hooks)->interrupt_cpu) {
330 (os_hooks)->interrupt_cpu(vm, logical_cpu, vector);
336 unsigned int v3_get_cpu_id() {
337 extern struct v3_os_hooks * os_hooks;
338 unsigned int ret = (unsigned int)-1;
340 if ((os_hooks) && (os_hooks)->get_cpu) {
341 ret = os_hooks->get_cpu();
349 int v3_vm_enter(struct guest_info * info) {
350 switch (v3_cpu_types[info->cpu_id]) {
353 case V3_SVM_REV3_CPU:
354 return v3_svm_enter(info);
360 return v3_vmx_enter(info);
364 PrintError("Attemping to enter a guest on an invalid CPU\n");