xref: /qemu/accel/stubs/kvm-stub.c (revision 336d354b) 
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 "sysemu/kvm.h"
15 #include "hw/pci/msi.h"
16 
17 KVMState *kvm_state;
18 bool kvm_kernel_irqchip;
19 bool kvm_async_interrupts_allowed;
20 bool kvm_eventfds_allowed;
21 bool kvm_irqfds_allowed;
22 bool kvm_resamplefds_allowed;
23 bool kvm_msi_via_irqfd_allowed;
24 bool kvm_gsi_routing_allowed;
25 bool kvm_gsi_direct_mapping;
26 bool kvm_allowed;
27 bool kvm_readonly_mem_allowed;
28 bool kvm_ioeventfd_any_length_allowed;
29 bool kvm_msi_use_devid;
30 
31 void kvm_flush_coalesced_mmio_buffer(void)
32 {
33 }
34 
35 void kvm_cpu_synchronize_state(CPUState *cpu)
36 {
37 }
38 
39 bool kvm_has_sync_mmu(void)
40 {
41     return false;
42 }
43 
44 int kvm_has_many_ioeventfds(void)
45 {
46     return 0;
47 }
48 
49 int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
50 {
51     return -ENOSYS;
52 }
53 
54 int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
55                           target_ulong len, int type)
56 {
57     return -EINVAL;
58 }
59 
60 int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
61                           target_ulong len, int type)
62 {
63     return -EINVAL;
64 }
65 
66 void kvm_remove_all_breakpoints(CPUState *cpu)
67 {
68 }
69 
70 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
71 {
72     return 1;
73 }
74 
75 int kvm_on_sigbus(int code, void *addr)
76 {
77     return 1;
78 }
79 
80 int kvm_irqchip_add_msi_route(KVMRouteChange *c, int vector, PCIDevice *dev)
81 {
82     return -ENOSYS;
83 }
84 
85 void kvm_init_irq_routing(KVMState *s)
86 {
87 }
88 
89 void kvm_irqchip_release_virq(KVMState *s, int virq)
90 {
91 }
92 
93 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
94                                  PCIDevice *dev)
95 {
96     return -ENOSYS;
97 }
98 
99 void kvm_irqchip_commit_routes(KVMState *s)
100 {
101 }
102 
103 void kvm_irqchip_add_change_notifier(Notifier *n)
104 {
105 }
106 
107 void kvm_irqchip_remove_change_notifier(Notifier *n)
108 {
109 }
110 
111 void kvm_irqchip_change_notify(void)
112 {
113 }
114 
115 int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
116 {
117     return -ENOSYS;
118 }
119 
120 int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
121                                        EventNotifier *rn, int virq)
122 {
123     return -ENOSYS;
124 }
125 
126 int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
127                                           int virq)
128 {
129     return -ENOSYS;
130 }
131 
132 bool kvm_has_free_slot(MachineState *ms)
133 {
134     return false;
135 }
136 
137 void kvm_init_cpu_signals(CPUState *cpu)
138 {
139     abort();
140 }
141 
142 bool kvm_arm_supports_user_irq(void)
143 {
144     return false;
145 }
146 
147 bool kvm_dirty_ring_enabled(void)
148 {
149     return false;
150 }
151