}
-int v3_start_vm(struct v3_vm_info * vm, unsigned int cpu_mask) {
- int i = 0;
- V3_Print("V3 -- Starting VM\n");
+static int start_core(void *p)
+{
+ struct guest_info * info = (struct guest_info*)p;
- for (i = 0; i < vm->num_cores; i++) {
- struct guest_info * info = &(vm->cores[i]);
+ PrintDebug("core %u: in start_core\n",info->cpu_id);
+
+ // we assume here that the APs are in INIT mode
+ // and only the BSP is in REAL
+ // the per-architecture code will rely on this
+ // assumption
- /* GRUESOM HACK... */
- // vm->cpu_id = v3_get_cpu_id();
- switch (v3_cpu_types[info->cpu_id]) {
+ switch (v3_cpu_types[info->cpu_id]) {
#ifdef CONFIG_SVM
- case V3_SVM_CPU:
- case V3_SVM_REV3_CPU:
- return v3_start_svm_guest(info);
- break;
+ case V3_SVM_CPU:
+ case V3_SVM_REV3_CPU:
+ return v3_start_svm_guest(info);
+ break;
#endif
#if CONFIG_VMX
- case V3_VMX_CPU:
- case V3_VMX_EPT_CPU:
- return v3_start_vmx_guest(info);
- break;
+ case V3_VMX_CPU:
+ case V3_VMX_EPT_CPU:
+ return v3_start_vmx_guest(info);
+ break;
#endif
- default:
- PrintError("Attemping to enter a guest on an invalid CPU\n");
- return -1;
+ default:
+ PrintError("Attemping to enter a guest on an invalid CPU\n");
+ return -1;
+ }
+ // should not happen
+ return 0;
+}
+
+
+static uint32_t get_next_core(unsigned int cpu_mask, uint32_t last_proc)
+{
+ uint32_t proc_to_use;
+
+ PrintDebug("In get_next_core cpu_mask=0x%x last_proc=%u\n",cpu_mask,last_proc);
+
+ proc_to_use=(last_proc+1) % 32; // only 32 procs
+ // This will wrap around, and eventually we can use proc 0,
+ // since that's clearly available
+ while (!((cpu_mask >> proc_to_use)&0x1)) {
+ proc_to_use=(proc_to_use+1)%32;
+ }
+ return proc_to_use;
+}
+
+int v3_start_vm(struct v3_vm_info * vm, unsigned int cpu_mask) {
+ uint32_t i;
+ uint32_t last_proc;
+ uint32_t proc_to_use;
+ char tname[16];
+
+ V3_Print("V3 -- Starting VM (%u cores)\n",vm->num_cores);
+
+ // We assume that we are running on CPU 0 of the underlying system
+ last_proc=0;
+
+ // We will fork off cores 1..n first, then boot core zero
+
+ // for the AP, we need to create threads
+
+ for (i = 1; i < vm->num_cores; i++) {
+ if (!os_hooks->start_thread_on_cpu) {
+ PrintError("Host OS does not support start_thread_on_cpu - FAILING\n");
+ return -1;
}
+
+ proc_to_use=get_next_core(cpu_mask,last_proc);
+ last_proc=proc_to_use;
+
+ PrintDebug("Starting virtual core %u on logical core %u\n",i,proc_to_use);
+
+ sprintf(tname,"core%u",i);
+
+ PrintDebug("run: core=%u, func=0x%p, arg=0x%p, name=%s\n",
+ proc_to_use, start_core, &(vm->cores[i]), tname);
+
+ // TODO: actually manage these threads instead of just launching them
+ if (!(os_hooks->start_thread_on_cpu(proc_to_use,start_core,&(vm->cores[i]),tname))) {
+ PrintError("Thread launch failed\n");
+ return -1;
+ }
+ }
+
+ // Finally launch the BSP on core 0
+ sprintf(tname,"core%u",0);
+ if (!os_hooks->start_thread_on_cpu(0,start_core,&(vm->cores[0]),tname)) {
+ PrintError("Thread launch failed\n");
+ return -1;
}
return 0;
+
}
