xref: /qemu/accel/stubs/kvm-stub.c (revision aa903cf3) 
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 bool kvm_direct_msi_allowed;
31 
32 void kvm_flush_coalesced_mmio_buffer(void)
33 {
34 }
35 
36 void kvm_cpu_synchronize_state(CPUState *cpu)
37 {
38 }
39 
40 bool kvm_has_sync_mmu(void)
41 {
42     return false;
43 }
44 
45 int kvm_has_many_ioeventfds(void)
46 {
47     return 0;
48 }
49 
50 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
51 {
52     return 1;
53 }
54 
55 int kvm_on_sigbus(int code, void *addr)
56 {
57     return 1;
58 }
59 
60 int kvm_irqchip_add_msi_route(KVMRouteChange *c, int vector, PCIDevice *dev)
61 {
62     return -ENOSYS;
63 }
64 
65 void kvm_init_irq_routing(KVMState *s)
66 {
67 }
68 
69 void kvm_irqchip_release_virq(KVMState *s, int virq)
70 {
71 }
72 
73 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
74                                  PCIDevice *dev)
75 {
76     return -ENOSYS;
77 }
78 
79 void kvm_irqchip_commit_routes(KVMState *s)
80 {
81 }
82 
83 void kvm_irqchip_add_change_notifier(Notifier *n)
84 {
85 }
86 
87 void kvm_irqchip_remove_change_notifier(Notifier *n)
88 {
89 }
90 
91 void kvm_irqchip_change_notify(void)
92 {
93 }
94 
95 int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
96 {
97     return -ENOSYS;
98 }
99 
100 int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
101                                        EventNotifier *rn, int virq)
102 {
103     return -ENOSYS;
104 }
105 
106 int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
107                                           int virq)
108 {
109     return -ENOSYS;
110 }
111 
112 bool kvm_has_free_slot(MachineState *ms)
113 {
114     return false;
115 }
116 
117 void kvm_init_cpu_signals(CPUState *cpu)
118 {
119     abort();
120 }
121 
122 bool kvm_arm_supports_user_irq(void)
123 {
124     return false;
125 }
126 
127 bool kvm_dirty_ring_enabled(void)
128 {
129     return false;
130 }
131 
132 uint32_t kvm_dirty_ring_size(void)
133 {
134     return 0;
135 }
136