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 "system/kvm_int.h" 13 #include "qemu/main-loop.h" 14 #include "system/accel-ops.h" 15 #include "system/cpus.h" 16 #include "qemu/guest-random.h" 17 18 #include "system/whpx.h" 19 #include "whpx-internal.h" 20 #include "whpx-accel-ops.h" 21 22 static void *whpx_cpu_thread_fn(void *arg) 23 { 24 CPUState *cpu = arg; 25 int r; 26 27 rcu_register_thread(); 28 29 bql_lock(); 30 qemu_thread_get_self(cpu->thread); 31 cpu->thread_id = qemu_get_thread_id(); 32 current_cpu = cpu; 33 34 r = whpx_init_vcpu(cpu); 35 if (r < 0) { 36 fprintf(stderr, "whpx_init_vcpu failed: %s\n", strerror(-r)); 37 exit(1); 38 } 39 40 /* signal CPU creation */ 41 cpu_thread_signal_created(cpu); 42 qemu_guest_random_seed_thread_part2(cpu->random_seed); 43 44 do { 45 if (cpu_can_run(cpu)) { 46 r = whpx_vcpu_exec(cpu); 47 if (r == EXCP_DEBUG) { 48 cpu_handle_guest_debug(cpu); 49 } 50 } 51 while (cpu_thread_is_idle(cpu)) { 52 qemu_cond_wait_bql(cpu->halt_cond); 53 } 54 qemu_wait_io_event_common(cpu); 55 } while (!cpu->unplug || cpu_can_run(cpu)); 56 57 whpx_destroy_vcpu(cpu); 58 cpu_thread_signal_destroyed(cpu); 59 bql_unlock(); 60 rcu_unregister_thread(); 61 return NULL; 62 } 63 64 static void whpx_start_vcpu_thread(CPUState *cpu) 65 { 66 char thread_name[VCPU_THREAD_NAME_SIZE]; 67 68 snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/WHPX", 69 cpu->cpu_index); 70 qemu_thread_create(cpu->thread, thread_name, whpx_cpu_thread_fn, 71 cpu, QEMU_THREAD_JOINABLE); 72 } 73 74 static void whpx_kick_vcpu_thread(CPUState *cpu) 75 { 76 if (!qemu_cpu_is_self(cpu)) { 77 whpx_vcpu_kick(cpu); 78 } 79 } 80 81 static bool whpx_vcpu_thread_is_idle(CPUState *cpu) 82 { 83 return !whpx_apic_in_platform(); 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 ops->cpu_thread_is_idle = whpx_vcpu_thread_is_idle; 93 94 ops->synchronize_post_reset = whpx_cpu_synchronize_post_reset; 95 ops->synchronize_post_init = whpx_cpu_synchronize_post_init; 96 ops->synchronize_state = whpx_cpu_synchronize_state; 97 ops->synchronize_pre_loadvm = whpx_cpu_synchronize_pre_loadvm; 98 ops->synchronize_pre_resume = whpx_cpu_synchronize_pre_resume; 99 } 100 101 static const TypeInfo whpx_accel_ops_type = { 102 .name = ACCEL_OPS_NAME("whpx"), 103 104 .parent = TYPE_ACCEL_OPS, 105 .class_init = whpx_accel_ops_class_init, 106 .abstract = true, 107 }; 108 109 static void whpx_accel_ops_register_types(void) 110 { 111 type_register_static(&whpx_accel_ops_type); 112 } 113 type_init(whpx_accel_ops_register_types); 114