xref: /openbmc/qemu/accel/stubs/kvm-stub.c (revision 159fb790) 
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_resamplefds_allowed;
21 bool kvm_msi_via_irqfd_allowed;
22 bool kvm_gsi_routing_allowed;
23 bool kvm_gsi_direct_mapping;
24 bool kvm_allowed;
25 bool kvm_readonly_mem_allowed;
26 bool kvm_msi_use_devid;
27 
28 void kvm_flush_coalesced_mmio_buffer(void)
29 {
30 }
31 
32 void kvm_cpu_synchronize_state(CPUState *cpu)
33 {
34 }
35 
36 bool kvm_has_sync_mmu(void)
37 {
38     return false;
39 }
40 
41 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
42 {
43     return 1;
44 }
45 
46 int kvm_on_sigbus(int code, void *addr)
47 {
48     return 1;
49 }
50 
51 int kvm_irqchip_add_msi_route(KVMRouteChange *c, int vector, PCIDevice *dev)
52 {
53     return -ENOSYS;
54 }
55 
56 void kvm_init_irq_routing(KVMState *s)
57 {
58 }
59 
60 void kvm_irqchip_release_virq(KVMState *s, int virq)
61 {
62 }
63 
64 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
65                                  PCIDevice *dev)
66 {
67     return -ENOSYS;
68 }
69 
70 void kvm_irqchip_commit_routes(KVMState *s)
71 {
72 }
73 
74 void kvm_irqchip_add_change_notifier(Notifier *n)
75 {
76 }
77 
78 void kvm_irqchip_remove_change_notifier(Notifier *n)
79 {
80 }
81 
82 void kvm_irqchip_change_notify(void)
83 {
84 }
85 
86 int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
87                                        EventNotifier *rn, int virq)
88 {
89     return -ENOSYS;
90 }
91 
92 int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
93                                           int virq)
94 {
95     return -ENOSYS;
96 }
97 
98 unsigned int kvm_get_max_memslots(void)
99 {
100     return 0;
101 }
102 
103 unsigned int kvm_get_free_memslots(void)
104 {
105     return 0;
106 }
107 
108 void kvm_init_cpu_signals(CPUState *cpu)
109 {
110     abort();
111 }
112 
113 bool kvm_arm_supports_user_irq(void)
114 {
115     return false;
116 }
117 
118 bool kvm_dirty_ring_enabled(void)
119 {
120     return false;
121 }
122 
123 uint32_t kvm_dirty_ring_size(void)
124 {
125     return 0;
126 }
127 
128 bool kvm_hwpoisoned_mem(void)
129 {
130     return false;
131 }
132 
133 int kvm_create_guest_memfd(uint64_t size, uint64_t flags, Error **errp)
134 {
135     return -ENOSYS;
136 }
137