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1 /*
2 * QEMU KVM support
3 *
4 * Copyright IBM, Corp. 2008
5 *
6 * Authors:
7 * Anthony Liguori <aliguori@us.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2 or later.
10 * See the COPYING file in the top-level directory.
11 *
12 */
13
14 #ifndef QEMU_KVM_H
15 #define QEMU_KVM_H
16
17 #include <errno.h>
18 #include "config-host.h"
19 #include "qemu-queue.h"
20
21 #ifdef CONFIG_KVM
22 #include <linux/kvm.h>
23 #endif
24
25 extern int kvm_allowed;
26 extern bool kvm_kernel_irqchip;
27 extern bool kvm_async_interrupts_allowed;
28 extern bool kvm_irqfds_allowed;
29 extern bool kvm_msi_via_irqfd_allowed;
30 extern bool kvm_gsi_routing_allowed;
31
32 #if defined CONFIG_KVM || !defined NEED_CPU_H
33 #define kvm_enabled() (kvm_allowed)
34 /**
35 * kvm_irqchip_in_kernel:
36 *
37 * Returns: true if the user asked us to create an in-kernel
38 * irqchip via the "kernel_irqchip=on" machine option.
39 * What this actually means is architecture and machine model
40 * specific: on PC, for instance, it means that the LAPIC,
41 * IOAPIC and PIT are all in kernel. This function should never
42 * be used from generic target-independent code: use one of the
43 * following functions or some other specific check instead.
44 */
45 #define kvm_irqchip_in_kernel() (kvm_kernel_irqchip)
46
47 /**
48 * kvm_async_interrupts_enabled:
49 *
50 * Returns: true if we can deliver interrupts to KVM
51 * asynchronously (ie by ioctl from any thread at any time)
52 * rather than having to do interrupt delivery synchronously
53 * (where the vcpu must be stopped at a suitable point first).
54 */
55 #define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed)
56
57 /**
58 * kvm_irqfds_enabled:
59 *
60 * Returns: true if we can use irqfds to inject interrupts into
61 * a KVM CPU (ie the kernel supports irqfds and we are running
62 * with a configuration where it is meaningful to use them).
63 */
64 #define kvm_irqfds_enabled() (kvm_irqfds_allowed)
65
66 /**
67 * kvm_msi_via_irqfd_enabled:
68 *
69 * Returns: true if we can route a PCI MSI (Message Signaled Interrupt)
70 * to a KVM CPU via an irqfd. This requires that the kernel supports
71 * this and that we're running in a configuration that permits it.
72 */
73 #define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed)
74
75 /**
76 * kvm_gsi_routing_enabled:
77 *
78 * Returns: true if GSI routing is enabled (ie the kernel supports
79 * it and we're running in a configuration that permits it).
80 */
81 #define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed)
82
83 #else
84 #define kvm_enabled() (0)
85 #define kvm_irqchip_in_kernel() (false)
86 #define kvm_async_interrupts_enabled() (false)
87 #define kvm_irqfds_enabled() (false)
88 #define kvm_msi_via_irqfd_enabled() (false)
89 #define kvm_gsi_routing_allowed() (false)
90 #endif
91
92 struct kvm_run;
93 struct kvm_lapic_state;
94
95 typedef struct KVMCapabilityInfo {
96 const char *name;
97 int value;
98 } KVMCapabilityInfo;
99
100 #define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP }
101 #define KVM_CAP_LAST_INFO { NULL, 0 }
102
103 struct KVMState;
104 typedef struct KVMState KVMState;
105 extern KVMState *kvm_state;
106
107 /* external API */
108
109 int kvm_init(void);
110
111 int kvm_has_sync_mmu(void);
112 int kvm_has_vcpu_events(void);
113 int kvm_has_robust_singlestep(void);
114 int kvm_has_debugregs(void);
115 int kvm_has_xsave(void);
116 int kvm_has_xcrs(void);
117 int kvm_has_pit_state2(void);
118 int kvm_has_many_ioeventfds(void);
119 int kvm_has_gsi_routing(void);
120 int kvm_has_intx_set_mask(void);
121
122 #ifdef NEED_CPU_H
123 int kvm_init_vcpu(CPUArchState *env);
124
125 int kvm_cpu_exec(CPUArchState *env);
126
127 #if !defined(CONFIG_USER_ONLY)
128 void *kvm_vmalloc(ram_addr_t size);
129 void *kvm_arch_vmalloc(ram_addr_t size);
130 void kvm_setup_guest_memory(void *start, size_t size);
131
132 void kvm_flush_coalesced_mmio_buffer(void);
133 #endif
134
135 int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
136 target_ulong len, int type);
137 int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
138 target_ulong len, int type);
139 void kvm_remove_all_breakpoints(CPUArchState *current_env);
140 int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap);
141 #ifndef _WIN32
142 int kvm_set_signal_mask(CPUArchState *env, const sigset_t *sigset);
143 #endif
144
145 int kvm_on_sigbus_vcpu(CPUArchState *env, int code, void *addr);
146 int kvm_on_sigbus(int code, void *addr);
147
148 /* internal API */
149
150 int kvm_ioctl(KVMState *s, int type, ...);
151
152 int kvm_vm_ioctl(KVMState *s, int type, ...);
153
154 int kvm_vcpu_ioctl(CPUArchState *env, int type, ...);
155
156 /* Arch specific hooks */
157
158 extern const KVMCapabilityInfo kvm_arch_required_capabilities[];
159
160 void kvm_arch_pre_run(CPUArchState *env, struct kvm_run *run);
161 void kvm_arch_post_run(CPUArchState *env, struct kvm_run *run);
162
163 int kvm_arch_handle_exit(CPUArchState *env, struct kvm_run *run);
164
165 int kvm_arch_process_async_events(CPUArchState *env);
166
167 int kvm_arch_get_registers(CPUArchState *env);
168
169 /* state subset only touched by the VCPU itself during runtime */
170 #define KVM_PUT_RUNTIME_STATE 1
171 /* state subset modified during VCPU reset */
172 #define KVM_PUT_RESET_STATE 2
173 /* full state set, modified during initialization or on vmload */
174 #define KVM_PUT_FULL_STATE 3
175
176 int kvm_arch_put_registers(CPUArchState *env, int level);
177
178 int kvm_arch_init(KVMState *s);
179
180 int kvm_arch_init_vcpu(CPUArchState *env);
181
182 void kvm_arch_reset_vcpu(CPUArchState *env);
183
184 int kvm_arch_on_sigbus_vcpu(CPUArchState *env, int code, void *addr);
185 int kvm_arch_on_sigbus(int code, void *addr);
186
187 void kvm_arch_init_irq_routing(KVMState *s);
188
189 int kvm_set_irq(KVMState *s, int irq, int level);
190 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg);
191
192 void kvm_irqchip_add_irq_route(KVMState *s, int gsi, int irqchip, int pin);
193
194 void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
195 void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
196
197 struct kvm_guest_debug;
198 struct kvm_debug_exit_arch;
199
200 struct kvm_sw_breakpoint {
201 target_ulong pc;
202 target_ulong saved_insn;
203 int use_count;
204 QTAILQ_ENTRY(kvm_sw_breakpoint) entry;
205 };
206
207 QTAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint);
208
209 struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUArchState *env,
210 target_ulong pc);
211
212 int kvm_sw_breakpoints_active(CPUArchState *env);
213
214 int kvm_arch_insert_sw_breakpoint(CPUArchState *current_env,
215 struct kvm_sw_breakpoint *bp);
216 int kvm_arch_remove_sw_breakpoint(CPUArchState *current_env,
217 struct kvm_sw_breakpoint *bp);
218 int kvm_arch_insert_hw_breakpoint(target_ulong addr,
219 target_ulong len, int type);
220 int kvm_arch_remove_hw_breakpoint(target_ulong addr,
221 target_ulong len, int type);
222 void kvm_arch_remove_all_hw_breakpoints(void);
223
224 void kvm_arch_update_guest_debug(CPUArchState *env, struct kvm_guest_debug *dbg);
225
226 bool kvm_arch_stop_on_emulation_error(CPUArchState *env);
227
228 int kvm_check_extension(KVMState *s, unsigned int extension);
229
230 uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
231 uint32_t index, int reg);
232 void kvm_cpu_synchronize_state(CPUArchState *env);
233 void kvm_cpu_synchronize_post_reset(CPUArchState *env);
234 void kvm_cpu_synchronize_post_init(CPUArchState *env);
235
236 /* generic hooks - to be moved/refactored once there are more users */
237
238 static inline void cpu_synchronize_state(CPUArchState *env)
239 {
240 if (kvm_enabled()) {
241 kvm_cpu_synchronize_state(env);
242 }
243 }
244
245 static inline void cpu_synchronize_post_reset(CPUArchState *env)
246 {
247 if (kvm_enabled()) {
248 kvm_cpu_synchronize_post_reset(env);
249 }
250 }
251
252 static inline void cpu_synchronize_post_init(CPUArchState *env)
253 {
254 if (kvm_enabled()) {
255 kvm_cpu_synchronize_post_init(env);
256 }
257 }
258
259
260 #if !defined(CONFIG_USER_ONLY)
261 int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
262 target_phys_addr_t *phys_addr);
263 #endif
264
265 #endif
266 int kvm_set_ioeventfd_mmio(int fd, uint32_t adr, uint32_t val, bool assign,
267 uint32_t size);
268
269 int kvm_set_ioeventfd_pio_word(int fd, uint16_t adr, uint16_t val, bool assign);
270
271 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg);
272 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg);
273 void kvm_irqchip_release_virq(KVMState *s, int virq);
274
275 int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, int virq);
276 int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq);
277 #endif