Claudio Fontana | 8ef39ec | 2020-07-07 11:39:12 +0200 | [diff] [blame] | 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" |
Paolo Bonzini | 9102c96 | 2020-12-19 04:06:36 -0500 | [diff] [blame] | 18 | #include "whpx-internal.h" |
Claudio Fontana | b86f59c | 2021-02-04 17:39:25 +0100 | [diff] [blame] | 19 | #include "whpx-accel-ops.h" |
Claudio Fontana | 8ef39ec | 2020-07-07 11:39:12 +0200 | [diff] [blame] | 20 | |
Claudio Fontana | 8ef39ec | 2020-07-07 11:39:12 +0200 | [diff] [blame] | 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 | |
Claudio Fontana | b86f59c | 2021-02-04 17:39:25 +0100 | [diff] [blame] | 86 | static void whpx_accel_ops_class_init(ObjectClass *oc, void *data) |
| 87 | { |
| 88 | AccelOpsClass *ops = ACCEL_OPS_CLASS(oc); |
Claudio Fontana | 8ef39ec | 2020-07-07 11:39:12 +0200 | [diff] [blame] | 89 | |
Claudio Fontana | b86f59c | 2021-02-04 17:39:25 +0100 | [diff] [blame] | 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, |
Claudio Fontana | 8ef39ec | 2020-07-07 11:39:12 +0200 | [diff] [blame] | 105 | }; |
Claudio Fontana | b86f59c | 2021-02-04 17:39:25 +0100 | [diff] [blame] | 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); |