X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fvmm.c;h=8b4eed596649e70a8009ef7f7dddddbe7bf64b5e;hb=8a3dbb70c29175bad79764a0b2f3961b98138bb2;hp=2194ae5b7c9db8d04521eecaebd25540cc9c5cb6;hpb=92edfe79109b322a996a9ad06d568b5555862003;p=palacios.git diff --git a/palacios/src/palacios/vmm.c b/palacios/src/palacios/vmm.c index 2194ae5..8b4eed5 100644 --- a/palacios/src/palacios/vmm.c +++ b/palacios/src/palacios/vmm.c @@ -21,41 +21,41 @@ #include #include #include -#include #include #include #include +#include -#ifdef CONFIG_SVM +#ifdef V3_CONFIG_SVM #include #endif -#ifdef CONFIG_VMX +#ifdef V3_CONFIG_VMX #include #endif -#ifdef CONFIG_VNET -#include +#ifdef V3_CONFIG_CHECKPOINT +#include #endif -v3_cpu_arch_t v3_cpu_types[CONFIG_MAX_CPUS]; +v3_cpu_arch_t v3_cpu_types[V3_CONFIG_MAX_CPUS]; struct v3_os_hooks * os_hooks = NULL; - int v3_dbg_enable = 0; + static void init_cpu(void * arg) { uint32_t cpu_id = (uint32_t)(addr_t)arg; -#ifdef CONFIG_SVM +#ifdef V3_CONFIG_SVM if (v3_is_svm_capable()) { PrintDebug("Machine is SVM Capable\n"); v3_init_svm_cpu(cpu_id); } else #endif -#ifdef CONFIG_VMX +#ifdef V3_CONFIG_VMX if (v3_is_vmx_capable()) { PrintDebug("Machine is VMX Capable\n"); v3_init_vmx_cpu(cpu_id); @@ -63,7 +63,35 @@ static void init_cpu(void * arg) { } else #endif { - PrintError("CPU has no virtualizationExtensions\n"); + PrintError("CPU has no virtualization Extensions\n"); + } +} + + +static void deinit_cpu(void * arg) { + uint32_t cpu_id = (uint32_t)(addr_t)arg; + + + switch (v3_cpu_types[cpu_id]) { +#ifdef V3_CONFIG_SVM + case V3_SVM_CPU: + case V3_SVM_REV3_CPU: + PrintDebug("Deinitializing SVM CPU %d\n", cpu_id); + v3_deinit_svm_cpu(cpu_id); + break; +#endif +#ifdef V3_CONFIG_VMX + case V3_VMX_CPU: + case V3_VMX_EPT_CPU: + case V3_VMX_EPT_UG_CPU: + PrintDebug("Deinitializing VMX CPU %d\n", cpu_id); + v3_deinit_vmx_cpu(cpu_id); + break; +#endif + case V3_INVALID_CPU: + default: + PrintError("CPU has no virtualization Extensions\n"); + break; } } @@ -77,29 +105,30 @@ void Init_V3(struct v3_os_hooks * hooks, int num_cpus) { // Set global variables. os_hooks = hooks; - for (i = 0; i < CONFIG_MAX_CPUS; i++) { + for (i = 0; i < V3_CONFIG_MAX_CPUS; i++) { v3_cpu_types[i] = V3_INVALID_CPU; } // Register all the possible device types - v3_init_devices(); + V3_init_devices(); // Register all shadow paging handlers V3_init_shdw_paging(); + // Register all extensions + V3_init_extensions(); + -#ifdef CONFIG_SYMMOD +#ifdef V3_CONFIG_SYMMOD V3_init_symmod(); #endif -#ifdef CONFIG_INSTRUMENT_VMM - v3_init_instrumentation(); +#ifdef V3_CONFIG_CHECKPOINT + V3_init_checkpoint(); #endif -#ifdef CONFIG_VNET - V3_init_vnet(); -#endif + if ((hooks) && (hooks->call_on_cpu)) { @@ -109,6 +138,37 @@ void Init_V3(struct v3_os_hooks * hooks, int num_cpus) { hooks->call_on_cpu(i, &init_cpu, (void *)(addr_t)i); } } + + +} + + +void Shutdown_V3() { + int i; + + V3_deinit_devices(); + V3_deinit_shdw_paging(); + + V3_deinit_extensions(); + +#ifdef V3_CONFIG_SYMMOD + V3_deinit_symmod(); +#endif + +#ifdef V3_CONFIG_CHECKPOINT + V3_deinit_checkpoint(); +#endif + + + if ((os_hooks) && (os_hooks->call_on_cpu)) { + for (i = 0; i < V3_CONFIG_MAX_CPUS; i++) { + if (v3_cpu_types[i] != V3_INVALID_CPU) { + V3_Call_On_CPU(i, deinit_cpu, (void *)(addr_t)i); + //deinit_cpu((void *)(addr_t)i); + } + } + } + } @@ -117,42 +177,51 @@ v3_cpu_arch_t v3_get_cpu_type(int cpu_id) { } -struct v3_vm_info * v3_create_vm(void * cfg) { - struct v3_vm_info * vm = v3_config_guest(cfg); +struct v3_vm_info * v3_create_vm(void * cfg, void * priv_data, char * name) { + struct v3_vm_info * vm = v3_config_guest(cfg, priv_data); if (vm == NULL) { PrintError("Could not configure guest\n"); return NULL; } + V3_Print("CORE 0 RIP=%p\n", (void *)(addr_t)(vm->cores[0].rip)); + + if (name == NULL) { + name = "[V3_VM]"; + } else if (strlen(name) >= 128) { + PrintError("VM name is too long. Will be truncated to 128 chars.\n"); + } + + memset(vm->name, 0, 128); + strncpy(vm->name, name, 127); + return vm; } -static int start_core(void *p) -{ - struct guest_info * info = (struct guest_info*)p; - 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 +static int start_core(void * p) +{ + struct guest_info * core = (struct guest_info *)p; - switch (v3_cpu_types[info->cpu_id]) { -#ifdef CONFIG_SVM + PrintDebug("virtual core %u (on logical core %u): in start_core (RIP=%p)\n", + core->vcpu_id, core->pcpu_id, (void *)(addr_t)core->rip); + + switch (v3_cpu_types[0]) { +#ifdef V3_CONFIG_SVM case V3_SVM_CPU: case V3_SVM_REV3_CPU: - return v3_start_svm_guest(info); + return v3_start_svm_guest(core); break; #endif -#if CONFIG_VMX +#if V3_CONFIG_VMX case V3_VMX_CPU: case V3_VMX_EPT_CPU: - return v3_start_vmx_guest(info); + case V3_VMX_EPT_UG_CPU: + return v3_start_vmx_guest(core); break; #endif default: @@ -164,87 +233,288 @@ static int start_core(void *p) } -static uint32_t get_next_core(unsigned int cpu_mask, uint32_t last_proc) -{ - uint32_t proc_to_use; +// For the moment very ugly. Eventually we will shift the cpu_mask to an arbitrary sized type... +#define MAX_CORES 32 - 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]; + uint8_t * core_mask = (uint8_t *)&cpu_mask; // This is to make future expansion easier + uint32_t avail_cores = 0; + int vcore_id = 0; - V3_Print("V3 -- Starting VM (%u cores)\n",vm->num_cores); + /// CHECK IF WE ARE MULTICORE ENABLED.... - // We assume that we are running on CPU 0 of the underlying system - last_proc=0; + V3_Print("V3 -- Starting VM (%u cores)\n", vm->num_cores); + V3_Print("CORE 0 RIP=%p\n", (void *)(addr_t)(vm->cores[0].rip)); - // 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; + + // Check that enough cores are present in the mask to handle vcores + for (i = 0; i < MAX_CORES; i++) { + int major = i / 8; + int minor = i % 8; + + if (core_mask[major] & (0x1 << minor)) { + avail_cores++; } + } + - proc_to_use=get_next_core(cpu_mask,last_proc); - last_proc=proc_to_use; + if (vm->num_cores > avail_cores) { + 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); + return -1; + } - // vm->cores[i].cpu_id=i; - // vm->cores[i].physical_cpu_id=proc_to_use; + // Spawn off threads for each core. + // We work backwards, so that core 0 is always started last. + for (i = 0, vcore_id = vm->num_cores - 1; (i < MAX_CORES) && (vcore_id >= 0); i++) { + int major = 0; + int minor = 0; + struct guest_info * core = &(vm->cores[vcore_id]); + char * specified_cpu = v3_cfg_val(core->core_cfg_data, "target_cpu"); + uint32_t core_idx = 0; + + if (specified_cpu != NULL) { + core_idx = atoi(specified_cpu); + + if ((core_idx < 0) || (core_idx >= MAX_CORES)) { + PrintError("Target CPU out of bounds (%d) (MAX_CORES=%d)\n", core_idx, MAX_CORES); + } + + i--; // We reset the logical core idx. Not strictly necessary I guess... + } else { + core_idx = i; + } + + major = core_idx / 8; + minor = core_idx % 8; + + if ((core_mask[major] & (0x1 << minor)) == 0) { + PrintError("Logical CPU %d not available for virtual core %d; not started\n", + core_idx, vcore_id); + + if (specified_cpu != NULL) { + PrintError("CPU was specified explicitly (%d). HARD ERROR\n", core_idx); + v3_stop_vm(vm); + return -1; + } + + continue; + } - PrintDebug("Starting virtual core %u on logical core %u\n",i,proc_to_use); + PrintDebug("Starting virtual core %u on logical core %u\n", + vcore_id, core_idx); - sprintf(tname,"core%u",i); + sprintf(core->exec_name, "%s-%u", vm->name, vcore_id); PrintDebug("run: core=%u, func=0x%p, arg=0x%p, name=%s\n", - proc_to_use, start_core, &(vm->cores[i]), tname); + core_idx, start_core, core, core->exec_name); - // 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))) { + core->pcpu_id = core_idx; + core->core_thread = V3_CREATE_THREAD_ON_CPU(core_idx, start_core, core, core->exec_name); + + if (core->core_thread == NULL) { PrintError("Thread launch failed\n"); + v3_stop_vm(vm); return -1; } + + vcore_id--; + } + + + return 0; + +} + + +int v3_reset_vm_core(struct guest_info * core, addr_t rip) { + + switch (v3_cpu_types[core->pcpu_id]) { +#ifdef V3_CONFIG_SVM + case V3_SVM_CPU: + case V3_SVM_REV3_CPU: + PrintDebug("Resetting SVM Guest CPU %d\n", core->vcpu_id); + return v3_reset_svm_vm_core(core, rip); +#endif +#ifdef V3_CONFIG_VMX + case V3_VMX_CPU: + case V3_VMX_EPT_CPU: + case V3_VMX_EPT_UG_CPU: + PrintDebug("Resetting VMX Guest CPU %d\n", core->vcpu_id); + return v3_reset_vmx_vm_core(core, rip); +#endif + case V3_INVALID_CPU: + default: + PrintError("CPU has no virtualization Extensions\n"); + break; + } + + return -1; +} + + + +/* move a virtual core to different physical core */ +int v3_move_vm_core(struct v3_vm_info * vm, int vcore_id, int target_cpu) { + struct guest_info * core = NULL; + + if ((vcore_id < 0) || (vcore_id >= vm->num_cores)) { + PrintError("Attempted to migrate invalid virtual core (%d)\n", vcore_id); + return -1; } - // vm->cores[0].cpu_id=0; - // vm->cores[0].physical_cpu_id=0; + core = &(vm->cores[vcore_id]); - // Finally launch the BSP on core 0 - sprintf(tname,"core%u",0); + if (target_cpu == core->pcpu_id) { + PrintError("Attempted to migrate to local core (%d)\n", target_cpu); + // well that was pointless + return 0; + } -#if CONFIG_LINUX - if (vm->num_cores==1) { - start_core(&(vm->cores[0])); + if (core->core_thread == NULL) { + PrintError("Attempted to migrate a core without a valid thread context\n"); return -1; - } else { - if (!os_hooks->start_thread_on_cpu(0,start_core,&(vm->cores[0]),tname)) { - PrintError("Thread launch failed\n"); + } + + while (v3_raise_barrier(vm, NULL) == -1); + + V3_Print("Performing Migration from %d to %d\n", core->pcpu_id, target_cpu); + + // Double check that we weren't preemptively migrated + if (target_cpu != core->pcpu_id) { + + V3_Print("Moving Core\n"); + + +#ifdef V3_CONFIG_VMX + switch (v3_cpu_types[core->pcpu_id]) { + case V3_VMX_CPU: + case V3_VMX_EPT_CPU: + case V3_VMX_EPT_UG_CPU: + PrintDebug("Flushing VMX Guest CPU %d\n", core->vcpu_id); + V3_Call_On_CPU(core->pcpu_id, (void (*)(void *))v3_flush_vmx_vm_core, (void *)core); + break; + default: + break; + } +#endif + + if (V3_MOVE_THREAD_TO_CPU(target_cpu, core->core_thread) != 0) { + PrintError("Failed to move Vcore %d to CPU %d\n", + core->vcpu_id, target_cpu); + v3_lower_barrier(vm); return -1; + } + + /* There will be a benign race window here: + core->pcpu_id will be set to the target core before its fully "migrated" + However the core will NEVER run on the old core again, its just in flight to the new core + */ + core->pcpu_id = target_cpu; + + V3_Print("core now at %d\n", core->pcpu_id); + } + + v3_lower_barrier(vm); + + return 0; +} + + + +int v3_stop_vm(struct v3_vm_info * vm) { + + vm->run_state = VM_STOPPED; + + // force exit all cores via a cross call/IPI + + while (1) { + int i = 0; + int still_running = 0; + + for (i = 0; i < vm->num_cores; i++) { + if (vm->cores[i].core_run_state != CORE_STOPPED) { + still_running = 1; + } + } + + if (still_running == 0) { + break; } + + v3_yield(NULL); + } + + V3_Print("VM stopped. Returning\n"); + + return 0; +} + + +int v3_pause_vm(struct v3_vm_info * vm) { + + if (vm->run_state != VM_RUNNING) { + PrintError("Tried to pause a VM that was not running\n"); + return -1; } -#else - if (!os_hooks->start_thread_on_cpu(0,start_core,&(vm->cores[0]),tname)) { - PrintError("Thread launch failed\n"); + + while (v3_raise_barrier(vm, NULL) == -1); + + vm->run_state = VM_PAUSED; + + return 0; +} + + +int v3_continue_vm(struct v3_vm_info * vm) { + + if (vm->run_state != VM_PAUSED) { + PrintError("Tried to continue a VM that was not paused\n"); return -1; } -#endif + + v3_lower_barrier(vm); + + vm->run_state = VM_RUNNING; return 0; +} + +#ifdef V3_CONFIG_CHECKPOINT +#include +int v3_save_vm(struct v3_vm_info * vm, char * store, char * url) { + return v3_chkpt_save_vm(vm, store, url); +} + + +int v3_load_vm(struct v3_vm_info * vm, char * store, char * url) { + return v3_chkpt_load_vm(vm, store, url); +} +#endif + + +int v3_free_vm(struct v3_vm_info * vm) { + int i = 0; + // deinitialize guest (free memory, etc...) + + v3_free_vm_devices(vm); + + // free cores + for (i = 0; i < vm->num_cores; i++) { + v3_free_core(&(vm->cores[i])); + } + + // free vm + v3_free_vm_internal(vm); + + v3_free_config(vm); + + V3_Free(vm); + + return 0; } @@ -290,16 +560,15 @@ v3_cpu_mode_t v3_get_host_cpu_mode() { void v3_yield_cond(struct guest_info * info) { uint64_t cur_cycle; - rdtscll(cur_cycle); + cur_cycle = v3_get_host_time(&info->time_state); if (cur_cycle > (info->yield_start_cycle + info->vm_info->yield_cycle_period)) { - - /* - PrintDebug("Conditional Yield (cur_cyle=%p, start_cycle=%p, period=%p)\n", - (void *)cur_cycle, (void *)info->yield_start_cycle, (void *)info->yield_cycle_period); - */ + //PrintDebug("Conditional Yield (cur_cyle=%p, start_cycle=%p, period=%p)\n", + // (void *)cur_cycle, (void *)info->yield_start_cycle, + // (void *)info->yield_cycle_period); + V3_Yield(); - rdtscll(info->yield_start_cycle); + info->yield_start_cycle = v3_get_host_time(&info->time_state); } } @@ -313,7 +582,7 @@ void v3_yield(struct guest_info * info) { V3_Yield(); if (info) { - rdtscll(info->yield_start_cycle); + info->yield_start_cycle = v3_get_host_time(&info->time_state); } } @@ -335,7 +604,6 @@ void v3_print_cond(const char * fmt, ...) { - void v3_interrupt_cpu(struct v3_vm_info * vm, int logical_cpu, int vector) { extern struct v3_os_hooks * os_hooks; @@ -346,30 +614,18 @@ void v3_interrupt_cpu(struct v3_vm_info * vm, int logical_cpu, int vector) { -unsigned int v3_get_cpu_id() { - extern struct v3_os_hooks * os_hooks; - unsigned int ret = (unsigned int)-1; - - if ((os_hooks) && (os_hooks)->get_cpu) { - ret = os_hooks->get_cpu(); - } - - return ret; -} - - - int v3_vm_enter(struct guest_info * info) { - switch (v3_cpu_types[info->cpu_id]) { -#ifdef CONFIG_SVM + switch (v3_cpu_types[0]) { +#ifdef V3_CONFIG_SVM case V3_SVM_CPU: case V3_SVM_REV3_CPU: return v3_svm_enter(info); break; #endif -#if CONFIG_VMX +#if V3_CONFIG_VMX case V3_VMX_CPU: case V3_VMX_EPT_CPU: + case V3_VMX_EPT_UG_CPU: return v3_vmx_enter(info); break; #endif