89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
/*
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* QEMU KVM support
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*
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* Copyright IBM, Corp. 2008
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* Red Hat, Inc. 2008
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*
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* Authors:
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* Anthony Liguori <aliguori@us.ibm.com>
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* Glauber Costa <gcosta@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "qemu/error-report.h"
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#include "qemu/main-loop.h"
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#include "sysemu/kvm_int.h"
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#include "sysemu/runstate.h"
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#include "sysemu/cpus.h"
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#include "qemu/guest-random.h"
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#include "kvm-cpus.h"
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static void *kvm_vcpu_thread_fn(void *arg)
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{
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CPUState *cpu = arg;
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int r;
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rcu_register_thread();
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qemu_mutex_lock_iothread();
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qemu_thread_get_self(cpu->thread);
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cpu->thread_id = qemu_get_thread_id();
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cpu->can_do_io = 1;
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current_cpu = cpu;
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r = kvm_init_vcpu(cpu);
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if (r < 0) {
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error_report("kvm_init_vcpu failed: %s", strerror(-r));
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exit(1);
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}
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kvm_init_cpu_signals(cpu);
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/* signal CPU creation */
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cpu_thread_signal_created(cpu);
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qemu_guest_random_seed_thread_part2(cpu->random_seed);
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do {
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if (cpu_can_run(cpu)) {
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r = kvm_cpu_exec(cpu);
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if (r == EXCP_DEBUG) {
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cpu_handle_guest_debug(cpu);
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}
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}
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qemu_wait_io_event(cpu);
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} while (!cpu->unplug || cpu_can_run(cpu));
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kvm_destroy_vcpu(cpu);
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cpu_thread_signal_destroyed(cpu);
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qemu_mutex_unlock_iothread();
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rcu_unregister_thread();
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return NULL;
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}
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static void kvm_start_vcpu_thread(CPUState *cpu)
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{
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char thread_name[VCPU_THREAD_NAME_SIZE];
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cpu->thread = g_malloc0(sizeof(QemuThread));
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cpu->halt_cond = g_malloc0(sizeof(QemuCond));
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qemu_cond_init(cpu->halt_cond);
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snprintf(thread_name, VCPU_THREAD_NAME_SIZE, "CPU %d/KVM",
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cpu->cpu_index);
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qemu_thread_create(cpu->thread, thread_name, kvm_vcpu_thread_fn,
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cpu, QEMU_THREAD_JOINABLE);
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}
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const CpusAccel kvm_cpus = {
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.create_vcpu_thread = kvm_start_vcpu_thread,
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.synchronize_post_reset = kvm_cpu_synchronize_post_reset,
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.synchronize_post_init = kvm_cpu_synchronize_post_init,
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.synchronize_state = kvm_cpu_synchronize_state,
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.synchronize_pre_loadvm = kvm_cpu_synchronize_pre_loadvm,
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};
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