xref: /openbmc/qemu/accel/stubs/kvm-stub.c (revision 3607715a) 
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 int kvm_destroy_vcpu(CPUState *cpu)
36 {
37     return -ENOSYS;
38 }
39 
40 int kvm_init_vcpu(CPUState *cpu)
41 {
42     return -ENOSYS;
43 }
44 
45 void kvm_flush_coalesced_mmio_buffer(void)
46 {
47 }
48 
49 void kvm_cpu_synchronize_state(CPUState *cpu)
50 {
51 }
52 
53 void kvm_cpu_synchronize_post_reset(CPUState *cpu)
54 {
55 }
56 
57 void kvm_cpu_synchronize_post_init(CPUState *cpu)
58 {
59 }
60 
61 int kvm_cpu_exec(CPUState *cpu)
62 {
63     abort();
64 }
65 
66 bool kvm_has_sync_mmu(void)
67 {
68     return false;
69 }
70 
71 int kvm_has_many_ioeventfds(void)
72 {
73     return 0;
74 }
75 
76 int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
77 {
78     return -ENOSYS;
79 }
80 
81 int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
82                           target_ulong len, int type)
83 {
84     return -EINVAL;
85 }
86 
87 int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
88                           target_ulong len, int type)
89 {
90     return -EINVAL;
91 }
92 
93 void kvm_remove_all_breakpoints(CPUState *cpu)
94 {
95 }
96 
97 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
98 {
99     return 1;
100 }
101 
102 int kvm_on_sigbus(int code, void *addr)
103 {
104     return 1;
105 }
106 
107 bool kvm_memcrypt_enabled(void)
108 {
109     return false;
110 }
111 
112 int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len)
113 {
114   return 1;
115 }
116 
117 #ifndef CONFIG_USER_ONLY
118 int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
119 {
120     return -ENOSYS;
121 }
122 
123 void kvm_init_irq_routing(KVMState *s)
124 {
125 }
126 
127 void kvm_irqchip_release_virq(KVMState *s, int virq)
128 {
129 }
130 
131 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
132                                  PCIDevice *dev)
133 {
134     return -ENOSYS;
135 }
136 
137 void kvm_irqchip_commit_routes(KVMState *s)
138 {
139 }
140 
141 void kvm_irqchip_add_change_notifier(Notifier *n)
142 {
143 }
144 
145 void kvm_irqchip_remove_change_notifier(Notifier *n)
146 {
147 }
148 
149 void kvm_irqchip_change_notify(void)
150 {
151 }
152 
153 int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
154 {
155     return -ENOSYS;
156 }
157 
158 int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
159                                        EventNotifier *rn, int virq)
160 {
161     return -ENOSYS;
162 }
163 
164 int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
165                                           int virq)
166 {
167     return -ENOSYS;
168 }
169 
170 bool kvm_has_free_slot(MachineState *ms)
171 {
172     return false;
173 }
174 
175 void kvm_init_cpu_signals(CPUState *cpu)
176 {
177     abort();
178 }
179 
180 bool kvm_arm_supports_user_irq(void)
181 {
182     return false;
183 }
184 #endif
185