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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 "sysemu/kvm_int.h"
#include "qemu/main-loop.h"
#include "sysemu/cpus.h"
#include "qemu/guest-random.h"
#include "sysemu/whpx.h"
#include "whpx-internal.h"
#include "whpx-cpus.h"
static void *whpx_cpu_thread_fn(void *arg)
{
CPUState *cpu = arg;
int r;
rcu_register_thread();
qemu_mutex_lock_iothread();
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_iothread(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);
qemu_mutex_unlock_iothread();
rcu_unregister_thread();
return NULL;
}
static void whpx_start_vcpu_thread(CPUState *cpu)
{
char thread_name[VCPU_THREAD_NAME_SIZE];
cpu->thread = g_malloc0(sizeof(QemuThread));
cpu->halt_cond = g_malloc0(sizeof(QemuCond));
qemu_cond_init(cpu->halt_cond);
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);
#ifdef _WIN32
cpu->hThread = qemu_thread_get_handle(cpu->thread);
#endif
}
static void whpx_kick_vcpu_thread(CPUState *cpu)
{
if (!qemu_cpu_is_self(cpu)) {
whpx_vcpu_kick(cpu);
}
}
const CpusAccel whpx_cpus = {
.create_vcpu_thread = whpx_start_vcpu_thread,
.kick_vcpu_thread = whpx_kick_vcpu_thread,
.synchronize_post_reset = whpx_cpu_synchronize_post_reset,
.synchronize_post_init = whpx_cpu_synchronize_post_init,
.synchronize_state = whpx_cpu_synchronize_state,
.synchronize_pre_loadvm = whpx_cpu_synchronize_pre_loadvm,
};
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