4 * Copyright IBM, Corp. 2008
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.
18 #include "config-host.h"
19 #include "qemu/queue.h"
21 #include "exec/memattrs.h"
24 #include <linux/kvm.h>
25 #include <linux/kvm_para.h>
27 /* These constants must never be used at runtime if kvm_enabled() is false.
28 * They exist so we don't need #ifdefs around KVM-specific code that already
29 * checks kvm_enabled() properly.
31 #define KVM_CPUID_SIGNATURE 0
32 #define KVM_CPUID_FEATURES 0
33 #define KVM_FEATURE_CLOCKSOURCE 0
34 #define KVM_FEATURE_NOP_IO_DELAY 0
35 #define KVM_FEATURE_MMU_OP 0
36 #define KVM_FEATURE_CLOCKSOURCE2 0
37 #define KVM_FEATURE_ASYNC_PF 0
38 #define KVM_FEATURE_STEAL_TIME 0
39 #define KVM_FEATURE_PV_EOI 0
40 #define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT 0
43 extern bool kvm_allowed;
44 extern bool kvm_kernel_irqchip;
45 extern bool kvm_async_interrupts_allowed;
46 extern bool kvm_halt_in_kernel_allowed;
47 extern bool kvm_eventfds_allowed;
48 extern bool kvm_irqfds_allowed;
49 extern bool kvm_resamplefds_allowed;
50 extern bool kvm_msi_via_irqfd_allowed;
51 extern bool kvm_gsi_routing_allowed;
52 extern bool kvm_gsi_direct_mapping;
53 extern bool kvm_readonly_mem_allowed;
55 #if defined CONFIG_KVM || !defined NEED_CPU_H
56 #define kvm_enabled() (kvm_allowed)
58 * kvm_irqchip_in_kernel:
60 * Returns: true if the user asked us to create an in-kernel
61 * irqchip via the "kernel_irqchip=on" machine option.
62 * What this actually means is architecture and machine model
63 * specific: on PC, for instance, it means that the LAPIC,
64 * IOAPIC and PIT are all in kernel. This function should never
65 * be used from generic target-independent code: use one of the
66 * following functions or some other specific check instead.
68 #define kvm_irqchip_in_kernel() (kvm_kernel_irqchip)
71 * kvm_async_interrupts_enabled:
73 * Returns: true if we can deliver interrupts to KVM
74 * asynchronously (ie by ioctl from any thread at any time)
75 * rather than having to do interrupt delivery synchronously
76 * (where the vcpu must be stopped at a suitable point first).
78 #define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed)
83 * Returns: true if halted cpus should still get a KVM_RUN ioctl to run
84 * inside of kernel space. This only works if MP state is implemented.
86 #define kvm_halt_in_kernel() (kvm_halt_in_kernel_allowed)
89 * kvm_eventfds_enabled:
91 * Returns: true if we can use eventfds to receive notifications
92 * from a KVM CPU (ie the kernel supports eventds and we are running
93 * with a configuration where it is meaningful to use them).
95 #define kvm_eventfds_enabled() (kvm_eventfds_allowed)
100 * Returns: true if we can use irqfds to inject interrupts into
101 * a KVM CPU (ie the kernel supports irqfds and we are running
102 * with a configuration where it is meaningful to use them).
104 #define kvm_irqfds_enabled() (kvm_irqfds_allowed)
107 * kvm_resamplefds_enabled:
109 * Returns: true if we can use resamplefds to inject interrupts into
110 * a KVM CPU (ie the kernel supports resamplefds and we are running
111 * with a configuration where it is meaningful to use them).
113 #define kvm_resamplefds_enabled() (kvm_resamplefds_allowed)
116 * kvm_msi_via_irqfd_enabled:
118 * Returns: true if we can route a PCI MSI (Message Signaled Interrupt)
119 * to a KVM CPU via an irqfd. This requires that the kernel supports
120 * this and that we're running in a configuration that permits it.
122 #define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed)
125 * kvm_gsi_routing_enabled:
127 * Returns: true if GSI routing is enabled (ie the kernel supports
128 * it and we're running in a configuration that permits it).
130 #define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed)
133 * kvm_gsi_direct_mapping:
135 * Returns: true if GSI direct mapping is enabled.
137 #define kvm_gsi_direct_mapping() (kvm_gsi_direct_mapping)
140 * kvm_readonly_mem_enabled:
142 * Returns: true if KVM readonly memory is enabled (ie the kernel
143 * supports it and we're running in a configuration that permits it).
145 #define kvm_readonly_mem_enabled() (kvm_readonly_mem_allowed)
148 #define kvm_enabled() (0)
149 #define kvm_irqchip_in_kernel() (false)
150 #define kvm_async_interrupts_enabled() (false)
151 #define kvm_halt_in_kernel() (false)
152 #define kvm_eventfds_enabled() (false)
153 #define kvm_irqfds_enabled() (false)
154 #define kvm_msi_via_irqfd_enabled() (false)
155 #define kvm_gsi_routing_allowed() (false)
156 #define kvm_gsi_direct_mapping() (false)
157 #define kvm_readonly_mem_enabled() (false)
161 struct kvm_lapic_state;
162 struct kvm_irq_routing_entry;
164 typedef struct KVMCapabilityInfo {
169 #define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP }
170 #define KVM_CAP_LAST_INFO { NULL, 0 }
173 typedef struct KVMState KVMState;
174 extern KVMState *kvm_state;
178 bool kvm_has_free_slot(MachineState *ms);
179 int kvm_has_sync_mmu(void);
180 int kvm_has_vcpu_events(void);
181 int kvm_has_robust_singlestep(void);
182 int kvm_has_debugregs(void);
183 int kvm_has_xsave(void);
184 int kvm_has_xcrs(void);
185 int kvm_has_pit_state2(void);
186 int kvm_has_many_ioeventfds(void);
187 int kvm_has_gsi_routing(void);
188 int kvm_has_intx_set_mask(void);
190 int kvm_init_vcpu(CPUState *cpu);
191 int kvm_cpu_exec(CPUState *cpu);
195 void kvm_setup_guest_memory(void *start, size_t size);
196 void kvm_flush_coalesced_mmio_buffer(void);
198 int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr,
199 target_ulong len, int type);
200 int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr,
201 target_ulong len, int type);
202 void kvm_remove_all_breakpoints(CPUState *cpu);
203 int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap);
205 int kvm_set_signal_mask(CPUState *cpu, const sigset_t *sigset);
208 int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr);
209 int kvm_on_sigbus(int code, void *addr);
213 int kvm_ioctl(KVMState *s, int type, ...);
215 int kvm_vm_ioctl(KVMState *s, int type, ...);
217 int kvm_vcpu_ioctl(CPUState *cpu, int type, ...);
220 * kvm_device_ioctl - call an ioctl on a kvm device
221 * @fd: The KVM device file descriptor as returned from KVM_CREATE_DEVICE
222 * @type: The device-ctrl ioctl number
224 * Returns: -errno on error, nonnegative on success
226 int kvm_device_ioctl(int fd, int type, ...);
229 * kvm_vm_check_attr - check for existence of a specific vm attribute
230 * @s: The KVMState pointer
232 * @attr: the attribute of that group to query for
234 * Returns: 1 if the attribute exists
235 * 0 if the attribute either does not exist or if the vm device
236 * interface is unavailable
238 int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr);
241 * kvm_create_device - create a KVM device for the device control API
242 * @KVMState: The KVMState pointer
243 * @type: The KVM device type (see Documentation/virtual/kvm/devices in the
245 * @test: If true, only test if device can be created, but don't actually
248 * Returns: -errno on error, nonnegative on success: @test ? 0 : device fd;
250 int kvm_create_device(KVMState *s, uint64_t type, bool test);
253 /* Arch specific hooks */
255 extern const KVMCapabilityInfo kvm_arch_required_capabilities[];
257 void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run);
258 MemTxAttrs kvm_arch_post_run(CPUState *cpu, struct kvm_run *run);
260 int kvm_arch_handle_exit(CPUState *cpu, struct kvm_run *run);
262 int kvm_arch_process_async_events(CPUState *cpu);
264 int kvm_arch_get_registers(CPUState *cpu);
266 /* state subset only touched by the VCPU itself during runtime */
267 #define KVM_PUT_RUNTIME_STATE 1
268 /* state subset modified during VCPU reset */
269 #define KVM_PUT_RESET_STATE 2
270 /* full state set, modified during initialization or on vmload */
271 #define KVM_PUT_FULL_STATE 3
273 int kvm_arch_put_registers(CPUState *cpu, int level);
275 int kvm_arch_init(MachineState *ms, KVMState *s);
277 int kvm_arch_init_vcpu(CPUState *cpu);
279 /* Returns VCPU ID to be used on KVM_CREATE_VCPU ioctl() */
280 unsigned long kvm_arch_vcpu_id(CPUState *cpu);
282 int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr);
283 int kvm_arch_on_sigbus(int code, void *addr);
285 void kvm_arch_init_irq_routing(KVMState *s);
287 int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
288 uint64_t address, uint32_t data);
290 int kvm_set_irq(KVMState *s, int irq, int level);
291 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg);
293 void kvm_irqchip_add_irq_route(KVMState *s, int gsi, int irqchip, int pin);
294 void kvm_irqchip_commit_routes(KVMState *s);
296 void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
297 void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
299 struct kvm_guest_debug;
300 struct kvm_debug_exit_arch;
302 struct kvm_sw_breakpoint {
304 target_ulong saved_insn;
306 QTAILQ_ENTRY(kvm_sw_breakpoint) entry;
309 QTAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint);
311 struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu,
314 int kvm_sw_breakpoints_active(CPUState *cpu);
316 int kvm_arch_insert_sw_breakpoint(CPUState *cpu,
317 struct kvm_sw_breakpoint *bp);
318 int kvm_arch_remove_sw_breakpoint(CPUState *cpu,
319 struct kvm_sw_breakpoint *bp);
320 int kvm_arch_insert_hw_breakpoint(target_ulong addr,
321 target_ulong len, int type);
322 int kvm_arch_remove_hw_breakpoint(target_ulong addr,
323 target_ulong len, int type);
324 void kvm_arch_remove_all_hw_breakpoints(void);
326 void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg);
328 bool kvm_arch_stop_on_emulation_error(CPUState *cpu);
330 int kvm_check_extension(KVMState *s, unsigned int extension);
332 int kvm_vm_check_extension(KVMState *s, unsigned int extension);
334 #define kvm_vm_enable_cap(s, capability, cap_flags, ...) \
336 struct kvm_enable_cap cap = { \
338 .flags = cap_flags, \
340 uint64_t args_tmp[] = { __VA_ARGS__ }; \
342 for (i = 0; i < (int)ARRAY_SIZE(args_tmp) && \
343 i < ARRAY_SIZE(cap.args); i++) { \
344 cap.args[i] = args_tmp[i]; \
346 kvm_vm_ioctl(s, KVM_ENABLE_CAP, &cap); \
349 #define kvm_vcpu_enable_cap(cpu, capability, cap_flags, ...) \
351 struct kvm_enable_cap cap = { \
353 .flags = cap_flags, \
355 uint64_t args_tmp[] = { __VA_ARGS__ }; \
357 for (i = 0; i < (int)ARRAY_SIZE(args_tmp) && \
358 i < ARRAY_SIZE(cap.args); i++) { \
359 cap.args[i] = args_tmp[i]; \
361 kvm_vcpu_ioctl(cpu, KVM_ENABLE_CAP, &cap); \
364 uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
365 uint32_t index, int reg);
367 void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len);
369 #if !defined(CONFIG_USER_ONLY)
370 int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
374 #endif /* NEED_CPU_H */
376 void kvm_cpu_synchronize_state(CPUState *cpu);
377 void kvm_cpu_synchronize_post_reset(CPUState *cpu);
378 void kvm_cpu_synchronize_post_init(CPUState *cpu);
379 void kvm_cpu_clean_state(CPUState *cpu);
381 /* generic hooks - to be moved/refactored once there are more users */
383 static inline void cpu_synchronize_state(CPUState *cpu)
386 kvm_cpu_synchronize_state(cpu);
390 static inline void cpu_synchronize_post_reset(CPUState *cpu)
393 kvm_cpu_synchronize_post_reset(cpu);
397 static inline void cpu_synchronize_post_init(CPUState *cpu)
400 kvm_cpu_synchronize_post_init(cpu);
404 static inline void cpu_clean_state(CPUState *cpu)
407 kvm_cpu_clean_state(cpu);
411 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg);
412 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg);
413 void kvm_irqchip_release_virq(KVMState *s, int virq);
415 int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter);
417 int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n,
418 EventNotifier *rn, int virq);
419 int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq);
420 void kvm_pc_gsi_handler(void *opaque, int n, int level);
421 void kvm_pc_setup_irq_routing(bool pci_enabled);
422 void kvm_init_irq_routing(KVMState *s);
425 * kvm_arch_irqchip_create:
426 * @KVMState: The KVMState pointer
428 * Allow architectures to create an in-kernel irq chip themselves.
430 * Returns: < 0: error
431 * 0: irq chip was not created
432 * > 0: irq chip was created
434 int kvm_arch_irqchip_create(KVMState *s);
437 * kvm_set_one_reg - set a register value in KVM via KVM_SET_ONE_REG ioctl
438 * @id: The register ID
439 * @source: The pointer to the value to be set. It must point to a variable
440 * of the correct type/size for the register being accessed.
442 * Returns: 0 on success, or a negative errno on failure.
444 int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source);
447 * kvm_get_one_reg - get a register value from KVM via KVM_GET_ONE_REG ioctl
448 * @id: The register ID
449 * @target: The pointer where the value is to be stored. It must point to a
450 * variable of the correct type/size for the register being accessed.
452 * Returns: 0 on success, or a negative errno on failure.
454 int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target);