xref: /openbmc/qemu/accel/stubs/kvm-stub.c (revision bb4776be7733659bdbce4548e2c042107bad76f4) 
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 "cpu.h"
15 #include "sysemu/kvm.h"
16 
17 #ifndef CONFIG_USER_ONLY
18 #include "hw/pci/msi.h"
19 #endif
20 
21 KVMState *kvm_state;
22 bool kvm_kernel_irqchip;
23 bool kvm_async_interrupts_allowed;
24 bool kvm_eventfds_allowed;
25 bool kvm_irqfds_allowed;
26 bool kvm_resamplefds_allowed;
27 bool kvm_msi_via_irqfd_allowed;
28 bool kvm_gsi_routing_allowed;
29 bool kvm_gsi_direct_mapping;
30 bool kvm_allowed;
31 bool kvm_readonly_mem_allowed;
32 bool kvm_ioeventfd_any_length_allowed;
33 bool kvm_msi_use_devid;
34 
35 void kvm_destroy_vcpu(CPUState *cpu)
36 {
37 }
38 
39 int kvm_init_vcpu(CPUState *cpu)
40 {
41     return -ENOSYS;
42 }
43 
44 void kvm_flush_coalesced_mmio_buffer(void)
45 {
46 }
47 
48 void kvm_cpu_synchronize_state(CPUState *cpu)
49 {
50 }
51 
52 void kvm_cpu_synchronize_post_reset(CPUState *cpu)
53 {
54 }
55 
56 void kvm_cpu_synchronize_post_init(CPUState *cpu)
57 {
58 }
59 
60 int kvm_cpu_exec(CPUState *cpu)
61 {
62     abort();
63 }
64 
65 bool kvm_has_sync_mmu(void)
66 {
67     return false;
68 }
69 
70 int kvm_has_many_ioeventfds(void)
71 {
72     return 0;
73 }
74 
75 int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
76 {
77     return -ENOSYS;
78 }
79 
80 int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
81                           target_ulong len, int type)
82 {
83     return -EINVAL;
84 }
85 
86 int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
87                           target_ulong len, int type)
88 {
89     return -EINVAL;
90 }
91 
92 void kvm_remove_all_breakpoints(CPUState *cpu)
93 {
94 }
95 
96 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
97 {
98     return 1;
99 }
100 
101 int kvm_on_sigbus(int code, void *addr)
102 {
103     return 1;
104 }
105 
106 bool kvm_memcrypt_enabled(void)
107 {
108     return false;
109 }
110 
111 int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len)
112 {
113   return 1;
114 }
115 
116 #ifndef CONFIG_USER_ONLY
117 int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
118 {
119     return -ENOSYS;
120 }
121 
122 void kvm_init_irq_routing(KVMState *s)
123 {
124 }
125 
126 void kvm_irqchip_release_virq(KVMState *s, int virq)
127 {
128 }
129 
130 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
131                                  PCIDevice *dev)
132 {
133     return -ENOSYS;
134 }
135 
136 void kvm_irqchip_commit_routes(KVMState *s)
137 {
138 }
139 
140 void kvm_irqchip_add_change_notifier(Notifier *n)
141 {
142 }
143 
144 void kvm_irqchip_remove_change_notifier(Notifier *n)
145 {
146 }
147 
148 void kvm_irqchip_change_notify(void)
149 {
150 }
151 
152 int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
153 {
154     return -ENOSYS;
155 }
156 
157 int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
158                                        EventNotifier *rn, int virq)
159 {
160     return -ENOSYS;
161 }
162 
163 int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
164                                           int virq)
165 {
166     return -ENOSYS;
167 }
168 
169 bool kvm_has_free_slot(MachineState *ms)
170 {
171     return false;
172 }
173 
174 void kvm_init_cpu_signals(CPUState *cpu)
175 {
176     abort();
177 }
178 
179 bool kvm_arm_supports_user_irq(void)
180 {
181     return false;
182 }
183 #endif
184