| 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 "accel/accel-cpu-ops.h" |
| 15 | #include "system/cpus.h" |
| 16 | #include "qemu/guest-random.h" |
| 17 | |
| 18 | #include "system/whpx.h" |
| 19 | #include "system/whpx-internal.h" |
| 20 | #include "system/whpx-all.h" |
| 21 | #include "system/whpx-accel-ops.h" |
| 22 | |
| 23 | static void *whpx_cpu_thread_fn(void *arg) |
| 24 | { |
| 25 | CPUState *cpu = arg; |
| 26 | int r; |
| 27 | |
| 28 | rcu_register_thread(); |
| 29 | |
| 30 | bql_lock(); |
| 31 | qemu_thread_get_self(cpu->thread); |
| 32 | cpu->thread_id = qemu_get_thread_id(); |
| 33 | current_cpu = cpu; |
| 34 | |
| 35 | r = whpx_init_vcpu(cpu); |
| 36 | if (r < 0) { |
| 37 | fprintf(stderr, "whpx_init_vcpu failed: %s\n", strerror(-r)); |
| 38 | exit(1); |
| 39 | } |
| 40 | |
| 41 | /* signal CPU creation */ |
| 42 | cpu_thread_signal_created(cpu); |
| 43 | qemu_guest_random_seed_thread_part2(cpu->random_seed); |
| 44 | |
| 45 | do { |
| 46 | qemu_process_cpu_events(cpu); |
| 47 | |
| 48 | if (cpu_can_run(cpu)) { |
| 49 | r = whpx_vcpu_exec(cpu); |
| 50 | if (r == EXCP_DEBUG) { |
| 51 | cpu_handle_guest_debug(cpu); |
| 52 | } |
| 53 | } |
| 54 | } while (!cpu->unplug || cpu_can_run(cpu)); |
| 55 | |
| 56 | whpx_destroy_vcpu(cpu); |
| 57 | cpu_thread_signal_destroyed(cpu); |
| 58 | bql_unlock(); |
| 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 | snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/WHPX", |
| 68 | cpu->cpu_index); |
| 69 | qemu_thread_create(cpu->thread, thread_name, whpx_cpu_thread_fn, |
| 70 | cpu, QEMU_THREAD_JOINABLE); |
| 71 | } |
| 72 | |
| 73 | static void whpx_kick_vcpu_thread(CPUState *cpu) |
| 74 | { |
| 75 | if (!qemu_cpu_is_self(cpu)) { |
| 76 | whpx_vcpu_kick(cpu); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | static bool whpx_vcpu_thread_is_idle(CPUState *cpu) |
| 81 | { |
| 82 | return !whpx_irqchip_in_kernel(); |
| 83 | } |
| 84 | |
| 85 | |
| 86 | static void whpx_accel_ops_class_init(ObjectClass *oc, const 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 | ops->handle_interrupt = generic_handle_interrupt; |
| 94 | |
| 95 | ops->synchronize_post_reset = whpx_cpu_synchronize_post_reset; |
| 96 | ops->synchronize_post_init = whpx_cpu_synchronize_post_init; |
| 97 | ops->synchronize_state = whpx_cpu_synchronize_state; |
| 98 | ops->synchronize_pre_loadvm = whpx_cpu_synchronize_pre_loadvm; |
| 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); |