1 /* 2 * QEMU Windows Hypervisor Platform accelerator (WHPX) 3 * 4 * Copyright Microsoft Corp. 2017 5 * 6 * This work is licensed under the terms of the GNU GPL, version 2 or later. 7 * See the COPYING file in the top-level directory. 8 * 9 */ 10 11 #include "qemu/osdep.h" 12 #include "sysemu/kvm_int.h" 13 #include "qemu/main-loop.h" 14 #include "sysemu/cpus.h" 15 #include "qemu/guest-random.h" 16 17 #include "sysemu/whpx.h" 18 #include "whpx-internal.h" 19 #include "whpx-accel-ops.h" 20 21 static void *whpx_cpu_thread_fn(void *arg) 22 { 23 CPUState *cpu = arg; 24 int r; 25 26 rcu_register_thread(); 27 28 qemu_mutex_lock_iothread(); 29 qemu_thread_get_self(cpu->thread); 30 cpu->thread_id = qemu_get_thread_id(); 31 current_cpu = cpu; 32 33 r = whpx_init_vcpu(cpu); 34 if (r < 0) { 35 fprintf(stderr, "whpx_init_vcpu failed: %s\n", strerror(-r)); 36 exit(1); 37 } 38 39 /* signal CPU creation */ 40 cpu_thread_signal_created(cpu); 41 qemu_guest_random_seed_thread_part2(cpu->random_seed); 42 43 do { 44 if (cpu_can_run(cpu)) { 45 r = whpx_vcpu_exec(cpu); 46 if (r == EXCP_DEBUG) { 47 cpu_handle_guest_debug(cpu); 48 } 49 } 50 while (cpu_thread_is_idle(cpu)) { 51 qemu_cond_wait_iothread(cpu->halt_cond); 52 } 53 qemu_wait_io_event_common(cpu); 54 } while (!cpu->unplug || cpu_can_run(cpu)); 55 56 whpx_destroy_vcpu(cpu); 57 cpu_thread_signal_destroyed(cpu); 58 qemu_mutex_unlock_iothread(); 59 rcu_unregister_thread(); 60 return NULL; 61 } 62 63 static void whpx_start_vcpu_thread(CPUState *cpu) 64 { 65 char thread_name[VCPU_THREAD_NAME_SIZE]; 66 67 cpu->thread = g_malloc0(sizeof(QemuThread)); 68 cpu->halt_cond = g_malloc0(sizeof(QemuCond)); 69 qemu_cond_init(cpu->halt_cond); 70 snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/WHPX", 71 cpu->cpu_index); 72 qemu_thread_create(cpu->thread, thread_name, whpx_cpu_thread_fn, 73 cpu, QEMU_THREAD_JOINABLE); 74 #ifdef _WIN32 75 cpu->hThread = qemu_thread_get_handle(cpu->thread); 76 #endif 77 } 78 79 static void whpx_kick_vcpu_thread(CPUState *cpu) 80 { 81 if (!qemu_cpu_is_self(cpu)) { 82 whpx_vcpu_kick(cpu); 83 } 84 } 85 86 static void whpx_accel_ops_class_init(ObjectClass *oc, void *data) 87 { 88 AccelOpsClass *ops = ACCEL_OPS_CLASS(oc); 89 90 ops->create_vcpu_thread = whpx_start_vcpu_thread; 91 ops->kick_vcpu_thread = whpx_kick_vcpu_thread; 92 93 ops->synchronize_post_reset = whpx_cpu_synchronize_post_reset; 94 ops->synchronize_post_init = whpx_cpu_synchronize_post_init; 95 ops->synchronize_state = whpx_cpu_synchronize_state; 96 ops->synchronize_pre_loadvm = whpx_cpu_synchronize_pre_loadvm; 97 } 98 99 static const TypeInfo whpx_accel_ops_type = { 100 .name = ACCEL_OPS_NAME("whpx"), 101 102 .parent = TYPE_ACCEL_OPS, 103 .class_init = whpx_accel_ops_class_init, 104 .abstract = true, 105 }; 106 107 static void whpx_accel_ops_register_types(void) 108 { 109 type_register_static(&whpx_accel_ops_type); 110 } 111 type_init(whpx_accel_ops_register_types); 112