xref: /qemu/accel/stubs/kvm-stub.c (revision 29b62a10) 
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_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
50 {
51     return 1;
52 }
53 
54 int kvm_on_sigbus(int code, void *addr)
55 {
56     return 1;
57 }
58 
59 int kvm_irqchip_add_msi_route(KVMRouteChange *c, int vector, PCIDevice *dev)
60 {
61     return -ENOSYS;
62 }
63 
64 void kvm_init_irq_routing(KVMState *s)
65 {
66 }
67 
68 void kvm_irqchip_release_virq(KVMState *s, int virq)
69 {
70 }
71 
72 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
73                                  PCIDevice *dev)
74 {
75     return -ENOSYS;
76 }
77 
78 void kvm_irqchip_commit_routes(KVMState *s)
79 {
80 }
81 
82 void kvm_irqchip_add_change_notifier(Notifier *n)
83 {
84 }
85 
86 void kvm_irqchip_remove_change_notifier(Notifier *n)
87 {
88 }
89 
90 void kvm_irqchip_change_notify(void)
91 {
92 }
93 
94 int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
95 {
96     return -ENOSYS;
97 }
98 
99 int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
100                                        EventNotifier *rn, int virq)
101 {
102     return -ENOSYS;
103 }
104 
105 int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
106                                           int virq)
107 {
108     return -ENOSYS;
109 }
110 
111 bool kvm_has_free_slot(MachineState *ms)
112 {
113     return false;
114 }
115 
116 void kvm_init_cpu_signals(CPUState *cpu)
117 {
118     abort();
119 }
120 
121 bool kvm_arm_supports_user_irq(void)
122 {
123     return false;
124 }
125 
126 bool kvm_dirty_ring_enabled(void)
127 {
128     return false;
129 }
130 
131 uint32_t kvm_dirty_ring_size(void)
132 {
133     return 0;
134 }
135