4 * Copyright IBM, Corp. 2008
8 * Anthony Liguori <aliguori@us.ibm.com>
9 * Glauber Costa <gcosta@redhat.com>
11 * This work is licensed under the terms of the GNU GPL, version 2 or later.
12 * See the COPYING file in the top-level directory.
16 #include "qemu/osdep.h"
17 #include "qemu/error-report.h"
18 #include "qemu/main-loop.h"
19 #include "sysemu/kvm.h"
20 #include "sysemu/kvm_int.h"
21 #include "sysemu/runstate.h"
22 #include "sysemu/cpus.h"
23 #include "qemu/guest-random.h"
24 #include "qapi/error.h"
26 #include <linux/kvm.h>
29 static void *kvm_vcpu_thread_fn(void *arg
)
34 rcu_register_thread();
36 qemu_mutex_lock_iothread();
37 qemu_thread_get_self(cpu
->thread
);
38 cpu
->thread_id
= qemu_get_thread_id();
42 r
= kvm_init_vcpu(cpu
, &error_fatal
);
43 kvm_init_cpu_signals(cpu
);
45 /* signal CPU creation */
46 cpu_thread_signal_created(cpu
);
47 qemu_guest_random_seed_thread_part2(cpu
->random_seed
);
50 if (cpu_can_run(cpu
)) {
51 r
= kvm_cpu_exec(cpu
);
52 if (r
== EXCP_DEBUG
) {
53 cpu_handle_guest_debug(cpu
);
56 qemu_wait_io_event(cpu
);
57 } while (!cpu
->unplug
|| cpu_can_run(cpu
));
59 kvm_destroy_vcpu(cpu
);
60 cpu_thread_signal_destroyed(cpu
);
61 qemu_mutex_unlock_iothread();
62 rcu_unregister_thread();
66 static void kvm_start_vcpu_thread(CPUState
*cpu
)
68 char thread_name
[VCPU_THREAD_NAME_SIZE
];
70 cpu
->thread
= g_malloc0(sizeof(QemuThread
));
71 cpu
->halt_cond
= g_malloc0(sizeof(QemuCond
));
72 qemu_cond_init(cpu
->halt_cond
);
73 snprintf(thread_name
, VCPU_THREAD_NAME_SIZE
, "CPU %d/KVM",
75 qemu_thread_create(cpu
->thread
, thread_name
, kvm_vcpu_thread_fn
,
76 cpu
, QEMU_THREAD_JOINABLE
);
79 static bool kvm_vcpu_thread_is_idle(CPUState
*cpu
)
81 return !kvm_halt_in_kernel();
84 static bool kvm_cpus_are_resettable(void)
86 return !kvm_enabled() || kvm_cpu_check_are_resettable();
89 #ifdef KVM_CAP_SET_GUEST_DEBUG
90 static int kvm_update_guest_debug_ops(CPUState
*cpu
)
92 return kvm_update_guest_debug(cpu
, 0);
96 static void kvm_accel_ops_class_init(ObjectClass
*oc
, void *data
)
98 AccelOpsClass
*ops
= ACCEL_OPS_CLASS(oc
);
100 ops
->create_vcpu_thread
= kvm_start_vcpu_thread
;
101 ops
->cpu_thread_is_idle
= kvm_vcpu_thread_is_idle
;
102 ops
->cpus_are_resettable
= kvm_cpus_are_resettable
;
103 ops
->synchronize_post_reset
= kvm_cpu_synchronize_post_reset
;
104 ops
->synchronize_post_init
= kvm_cpu_synchronize_post_init
;
105 ops
->synchronize_state
= kvm_cpu_synchronize_state
;
106 ops
->synchronize_pre_loadvm
= kvm_cpu_synchronize_pre_loadvm
;
108 #ifdef KVM_CAP_SET_GUEST_DEBUG
109 ops
->update_guest_debug
= kvm_update_guest_debug_ops
;
110 ops
->supports_guest_debug
= kvm_supports_guest_debug
;
111 ops
->insert_breakpoint
= kvm_insert_breakpoint
;
112 ops
->remove_breakpoint
= kvm_remove_breakpoint
;
113 ops
->remove_all_breakpoints
= kvm_remove_all_breakpoints
;
117 static const TypeInfo kvm_accel_ops_type
= {
118 .name
= ACCEL_OPS_NAME("kvm"),
120 .parent
= TYPE_ACCEL_OPS
,
121 .class_init
= kvm_accel_ops_class_init
,
125 static void kvm_accel_ops_register_types(void)
127 type_register_static(&kvm_accel_ops_type
);
129 type_init(kvm_accel_ops_register_types
);