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Claudio Fontana8ef39ec2020-07-07 11:39:12 +02001/*
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 Bonzini9102c962020-12-19 04:06:36 -050018#include "whpx-internal.h"
Claudio Fontanab86f59c2021-02-04 17:39:25 +010019#include "whpx-accel-ops.h"
Claudio Fontana8ef39ec2020-07-07 11:39:12 +020020
Claudio Fontana8ef39ec2020-07-07 11:39:12 +020021static 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
63static 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
79static void whpx_kick_vcpu_thread(CPUState *cpu)
80{
81 if (!qemu_cpu_is_self(cpu)) {
82 whpx_vcpu_kick(cpu);
83 }
84}
85
Claudio Fontanab86f59c2021-02-04 17:39:25 +010086static void whpx_accel_ops_class_init(ObjectClass *oc, void *data)
87{
88 AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
Claudio Fontana8ef39ec2020-07-07 11:39:12 +020089
Claudio Fontanab86f59c2021-02-04 17:39:25 +010090 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
99static 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 Fontana8ef39ec2020-07-07 11:39:12 +0200105};
Claudio Fontanab86f59c2021-02-04 17:39:25 +0100106
107static void whpx_accel_ops_register_types(void)
108{
109 type_register_static(&whpx_accel_ops_type);
110}
111type_init(whpx_accel_ops_register_types);