xref: /openbmc/qemu/accel/stubs/kvm-stub.c (revision 5a28fa5ba17254d0398a854657b47af3096bd86a) 
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 "system/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 bool kvm_has_sync_mmu(void)
33 {
34     return false;
35 }
36 
37 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr)
38 {
39     return 1;
40 }
41 
42 int kvm_on_sigbus(int code, void *addr)
43 {
44     return 1;
45 }
46 
47 int kvm_irqchip_add_msi_route(KVMRouteChange *c, int vector, PCIDevice *dev)
48 {
49     return -ENOSYS;
50 }
51 
52 void kvm_init_irq_routing(KVMState *s)
53 {
54 }
55 
56 void kvm_irqchip_release_virq(KVMState *s, int virq)
57 {
58 }
59 
60 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
61                                  PCIDevice *dev)
62 {
63     return -ENOSYS;
64 }
65 
66 void kvm_irqchip_commit_routes(KVMState *s)
67 {
68 }
69 
70 void kvm_irqchip_add_change_notifier(Notifier *n)
71 {
72 }
73 
74 void kvm_irqchip_remove_change_notifier(Notifier *n)
75 {
76 }
77 
78 void kvm_irqchip_change_notify(void)
79 {
80 }
81 
82 int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
83                                        EventNotifier *rn, int virq)
84 {
85     return -ENOSYS;
86 }
87 
88 int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
89                                           int virq)
90 {
91     return -ENOSYS;
92 }
93 
94 unsigned int kvm_get_max_memslots(void)
95 {
96     return 0;
97 }
98 
99 unsigned int kvm_get_free_memslots(void)
100 {
101     return 0;
102 }
103 
104 bool kvm_arm_supports_user_irq(void)
105 {
106     return false;
107 }
108 
109 bool kvm_dirty_ring_enabled(void)
110 {
111     return false;
112 }
113 
114 uint32_t kvm_dirty_ring_size(void)
115 {
116     return 0;
117 }
118 
119 bool kvm_hwpoisoned_mem(void)
120 {
121     return false;
122 }
123 
124 int kvm_create_guest_memfd(uint64_t size, uint64_t flags, Error **errp)
125 {
126     return -ENOSYS;
127 }
128