xref: /openbmc/qemu/accel/stubs/kvm-stub.c (revision a788260b2000f1fe826885c06f2a34df1c5b335c) 
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_resamplefds_allowed;
22 bool kvm_msi_via_irqfd_allowed;
23 bool kvm_gsi_routing_allowed;
24 bool kvm_gsi_direct_mapping;
25 bool kvm_allowed;
26 bool kvm_readonly_mem_allowed;
27 bool kvm_ioeventfd_any_length_allowed;
28 bool kvm_msi_use_devid;
29 
30 void kvm_flush_coalesced_mmio_buffer(void)
31 {
32 }
33 
34 void kvm_cpu_synchronize_state(CPUState *cpu)
35 {
36 }
37 
38 bool kvm_has_sync_mmu(void)
39 {
40     return false;
41 }
42 
43 int kvm_has_many_ioeventfds(void)
44 {
45     return 0;
46 }
47 
48 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
49 {
50     return 1;
51 }
52 
53 int kvm_on_sigbus(int code, void *addr)
54 {
55     return 1;
56 }
57 
58 int kvm_irqchip_add_msi_route(KVMRouteChange *c, int vector, PCIDevice *dev)
59 {
60     return -ENOSYS;
61 }
62 
63 void kvm_init_irq_routing(KVMState *s)
64 {
65 }
66 
67 void kvm_irqchip_release_virq(KVMState *s, int virq)
68 {
69 }
70 
71 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
72                                  PCIDevice *dev)
73 {
74     return -ENOSYS;
75 }
76 
77 void kvm_irqchip_commit_routes(KVMState *s)
78 {
79 }
80 
81 void kvm_irqchip_add_change_notifier(Notifier *n)
82 {
83 }
84 
85 void kvm_irqchip_remove_change_notifier(Notifier *n)
86 {
87 }
88 
89 void kvm_irqchip_change_notify(void)
90 {
91 }
92 
93 int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
94                                        EventNotifier *rn, int virq)
95 {
96     return -ENOSYS;
97 }
98 
99 int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
100                                           int virq)
101 {
102     return -ENOSYS;
103 }
104 
105 unsigned int kvm_get_max_memslots(void)
106 {
107     return 0;
108 }
109 
110 unsigned int kvm_get_free_memslots(void)
111 {
112     return 0;
113 }
114 
115 void kvm_init_cpu_signals(CPUState *cpu)
116 {
117     abort();
118 }
119 
120 bool kvm_arm_supports_user_irq(void)
121 {
122     return false;
123 }
124 
125 bool kvm_dirty_ring_enabled(void)
126 {
127     return false;
128 }
129 
130 uint32_t kvm_dirty_ring_size(void)
131 {
132     return 0;
133 }
134