xref: /qemu/accel/stubs/kvm-stub.c (revision 7271a819) 
1 /*
2  * QEMU KVM stub
3  *
4  * Copyright Red Hat, Inc. 2010
5  *
6  * Author: Paolo Bonzini     <pbonzini@redhat.com>
7  *
8  * This work is licensed under the terms of the GNU GPL, version 2 or later.
9  * See the COPYING file in the top-level directory.
10  *
11  */
12 
13 #include "qemu/osdep.h"
14 #include "qemu-common.h"
15 #include "cpu.h"
16 #include "sysemu/kvm.h"
17 
18 #ifndef CONFIG_USER_ONLY
19 #include "hw/pci/msi.h"
20 #endif
21 
22 KVMState *kvm_state;
23 bool kvm_kernel_irqchip;
24 bool kvm_async_interrupts_allowed;
25 bool kvm_eventfds_allowed;
26 bool kvm_irqfds_allowed;
27 bool kvm_resamplefds_allowed;
28 bool kvm_msi_via_irqfd_allowed;
29 bool kvm_gsi_routing_allowed;
30 bool kvm_gsi_direct_mapping;
31 bool kvm_allowed;
32 bool kvm_readonly_mem_allowed;
33 bool kvm_ioeventfd_any_length_allowed;
34 bool kvm_msi_use_devid;
35 
36 int kvm_destroy_vcpu(CPUState *cpu)
37 {
38     return -ENOSYS;
39 }
40 
41 int kvm_init_vcpu(CPUState *cpu)
42 {
43     return -ENOSYS;
44 }
45 
46 void kvm_flush_coalesced_mmio_buffer(void)
47 {
48 }
49 
50 void kvm_cpu_synchronize_state(CPUState *cpu)
51 {
52 }
53 
54 void kvm_cpu_synchronize_post_reset(CPUState *cpu)
55 {
56 }
57 
58 void kvm_cpu_synchronize_post_init(CPUState *cpu)
59 {
60 }
61 
62 int kvm_cpu_exec(CPUState *cpu)
63 {
64     abort();
65 }
66 
67 bool kvm_has_sync_mmu(void)
68 {
69     return false;
70 }
71 
72 int kvm_has_many_ioeventfds(void)
73 {
74     return 0;
75 }
76 
77 int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
78 {
79     return -ENOSYS;
80 }
81 
82 int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
83                           target_ulong len, int type)
84 {
85     return -EINVAL;
86 }
87 
88 int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
89                           target_ulong len, int type)
90 {
91     return -EINVAL;
92 }
93 
94 void kvm_remove_all_breakpoints(CPUState *cpu)
95 {
96 }
97 
98 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
99 {
100     return 1;
101 }
102 
103 int kvm_on_sigbus(int code, void *addr)
104 {
105     return 1;
106 }
107 
108 #ifndef CONFIG_USER_ONLY
109 int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
110 {
111     return -ENOSYS;
112 }
113 
114 void kvm_init_irq_routing(KVMState *s)
115 {
116 }
117 
118 void kvm_irqchip_release_virq(KVMState *s, int virq)
119 {
120 }
121 
122 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
123                                  PCIDevice *dev)
124 {
125     return -ENOSYS;
126 }
127 
128 void kvm_irqchip_commit_routes(KVMState *s)
129 {
130 }
131 
132 int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
133 {
134     return -ENOSYS;
135 }
136 
137 int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
138                                        EventNotifier *rn, int virq)
139 {
140     return -ENOSYS;
141 }
142 
143 int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
144                                           int virq)
145 {
146     return -ENOSYS;
147 }
148 
149 bool kvm_has_free_slot(MachineState *ms)
150 {
151     return false;
152 }
153 
154 void kvm_init_cpu_signals(CPUState *cpu)
155 {
156     abort();
157 }
158 
159 bool kvm_arm_supports_user_irq(void)
160 {
161     return false;
162 }
163 #endif
164