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- /*
- * QEMU Windows Hypervisor Platform accelerator (WHPX)
- *
- * Copyright Microsoft Corp. 2017
- *
- * This work is licensed under the terms of the GNU GPL, version 2 or later.
- * See the COPYING file in the top-level directory.
- *
- */
- #include "qemu/osdep.h"
- #include "system/kvm_int.h"
- #include "qemu/main-loop.h"
- #include "system/accel-ops.h"
- #include "system/cpus.h"
- #include "qemu/guest-random.h"
- #include "system/whpx.h"
- #include "whpx-internal.h"
- #include "whpx-accel-ops.h"
- static void *whpx_cpu_thread_fn(void *arg)
- {
- CPUState *cpu = arg;
- int r;
- rcu_register_thread();
- bql_lock();
- qemu_thread_get_self(cpu->thread);
- cpu->thread_id = qemu_get_thread_id();
- current_cpu = cpu;
- r = whpx_init_vcpu(cpu);
- if (r < 0) {
- fprintf(stderr, "whpx_init_vcpu failed: %s\n", strerror(-r));
- exit(1);
- }
- /* signal CPU creation */
- cpu_thread_signal_created(cpu);
- qemu_guest_random_seed_thread_part2(cpu->random_seed);
- do {
- if (cpu_can_run(cpu)) {
- r = whpx_vcpu_exec(cpu);
- if (r == EXCP_DEBUG) {
- cpu_handle_guest_debug(cpu);
- }
- }
- while (cpu_thread_is_idle(cpu)) {
- qemu_cond_wait_bql(cpu->halt_cond);
- }
- qemu_wait_io_event_common(cpu);
- } while (!cpu->unplug || cpu_can_run(cpu));
- whpx_destroy_vcpu(cpu);
- cpu_thread_signal_destroyed(cpu);
- bql_unlock();
- rcu_unregister_thread();
- return NULL;
- }
- static void whpx_start_vcpu_thread(CPUState *cpu)
- {
- char thread_name[VCPU_THREAD_NAME_SIZE];
- snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/WHPX",
- cpu->cpu_index);
- qemu_thread_create(cpu->thread, thread_name, whpx_cpu_thread_fn,
- cpu, QEMU_THREAD_JOINABLE);
- }
- static void whpx_kick_vcpu_thread(CPUState *cpu)
- {
- if (!qemu_cpu_is_self(cpu)) {
- whpx_vcpu_kick(cpu);
- }
- }
- static bool whpx_vcpu_thread_is_idle(CPUState *cpu)
- {
- return !whpx_apic_in_platform();
- }
- static void whpx_accel_ops_class_init(ObjectClass *oc, void *data)
- {
- AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
- ops->create_vcpu_thread = whpx_start_vcpu_thread;
- ops->kick_vcpu_thread = whpx_kick_vcpu_thread;
- ops->cpu_thread_is_idle = whpx_vcpu_thread_is_idle;
- ops->synchronize_post_reset = whpx_cpu_synchronize_post_reset;
- ops->synchronize_post_init = whpx_cpu_synchronize_post_init;
- ops->synchronize_state = whpx_cpu_synchronize_state;
- ops->synchronize_pre_loadvm = whpx_cpu_synchronize_pre_loadvm;
- ops->synchronize_pre_resume = whpx_cpu_synchronize_pre_resume;
- }
- static const TypeInfo whpx_accel_ops_type = {
- .name = ACCEL_OPS_NAME("whpx"),
- .parent = TYPE_ACCEL_OPS,
- .class_init = whpx_accel_ops_class_init,
- .abstract = true,
- };
- static void whpx_accel_ops_register_types(void)
- {
- type_register_static(&whpx_accel_ops_type);
- }
- type_init(whpx_accel_ops_register_types);
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