xref: /qemu/accel/stubs/kvm-stub.c (revision 138ca49a) 
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 "cpu.h"
15 #include "sysemu/kvm.h"
16 
17 #ifndef CONFIG_USER_ONLY
18 #include "hw/pci/msi.h"
19 #endif
20 
21 KVMState *kvm_state;
22 bool kvm_kernel_irqchip;
23 bool kvm_async_interrupts_allowed;
24 bool kvm_eventfds_allowed;
25 bool kvm_irqfds_allowed;
26 bool kvm_resamplefds_allowed;
27 bool kvm_msi_via_irqfd_allowed;
28 bool kvm_gsi_routing_allowed;
29 bool kvm_gsi_direct_mapping;
30 bool kvm_allowed;
31 bool kvm_readonly_mem_allowed;
32 bool kvm_ioeventfd_any_length_allowed;
33 bool kvm_msi_use_devid;
34 
35 void kvm_flush_coalesced_mmio_buffer(void)
36 {
37 }
38 
39 void kvm_cpu_synchronize_state(CPUState *cpu)
40 {
41 }
42 
43 bool kvm_has_sync_mmu(void)
44 {
45     return false;
46 }
47 
48 int kvm_has_many_ioeventfds(void)
49 {
50     return 0;
51 }
52 
53 int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap)
54 {
55     return -ENOSYS;
56 }
57 
58 int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
59                           target_ulong len, int type)
60 {
61     return -EINVAL;
62 }
63 
64 int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
65                           target_ulong len, int type)
66 {
67     return -EINVAL;
68 }
69 
70 void kvm_remove_all_breakpoints(CPUState *cpu)
71 {
72 }
73 
74 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
75 {
76     return 1;
77 }
78 
79 int kvm_on_sigbus(int code, void *addr)
80 {
81     return 1;
82 }
83 
84 bool kvm_memcrypt_enabled(void)
85 {
86     return false;
87 }
88 
89 int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len)
90 {
91   return 1;
92 }
93 
94 #ifndef CONFIG_USER_ONLY
95 int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
96 {
97     return -ENOSYS;
98 }
99 
100 void kvm_init_irq_routing(KVMState *s)
101 {
102 }
103 
104 void kvm_irqchip_release_virq(KVMState *s, int virq)
105 {
106 }
107 
108 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
109                                  PCIDevice *dev)
110 {
111     return -ENOSYS;
112 }
113 
114 void kvm_irqchip_commit_routes(KVMState *s)
115 {
116 }
117 
118 void kvm_irqchip_add_change_notifier(Notifier *n)
119 {
120 }
121 
122 void kvm_irqchip_remove_change_notifier(Notifier *n)
123 {
124 }
125 
126 void kvm_irqchip_change_notify(void)
127 {
128 }
129 
130 int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter)
131 {
132     return -ENOSYS;
133 }
134 
135 int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
136                                        EventNotifier *rn, int virq)
137 {
138     return -ENOSYS;
139 }
140 
141 int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
142                                           int virq)
143 {
144     return -ENOSYS;
145 }
146 
147 bool kvm_has_free_slot(MachineState *ms)
148 {
149     return false;
150 }
151 
152 void kvm_init_cpu_signals(CPUState *cpu)
153 {
154     abort();
155 }
156 
157 bool kvm_arm_supports_user_irq(void)
158 {
159     return false;
160 }
161 #endif
162