4 * Copyright IBM, Corp. 2008
7 * Anthony Liguori <aliguori@us.ibm.com>
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"
25 #include <linux/kvm.h>
26 #include <linux/kvm_para.h>
28 /* These constants must never be used at runtime if kvm_enabled() is false.
29 * They exist so we don't need #ifdefs around KVM-specific code that already
30 * checks kvm_enabled() properly.
32 #define KVM_CPUID_SIGNATURE 0
33 #define KVM_CPUID_FEATURES 0
34 #define KVM_FEATURE_CLOCKSOURCE 0
35 #define KVM_FEATURE_NOP_IO_DELAY 0
36 #define KVM_FEATURE_MMU_OP 0
37 #define KVM_FEATURE_CLOCKSOURCE2 0
38 #define KVM_FEATURE_ASYNC_PF 0
39 #define KVM_FEATURE_STEAL_TIME 0
40 #define KVM_FEATURE_PV_EOI 0
41 #define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT 0
44 extern bool kvm_allowed
;
45 extern bool kvm_kernel_irqchip
;
46 extern bool kvm_async_interrupts_allowed
;
47 extern bool kvm_halt_in_kernel_allowed
;
48 extern bool kvm_eventfds_allowed
;
49 extern bool kvm_irqfds_allowed
;
50 extern bool kvm_resamplefds_allowed
;
51 extern bool kvm_msi_via_irqfd_allowed
;
52 extern bool kvm_gsi_routing_allowed
;
53 extern bool kvm_gsi_direct_mapping
;
54 extern bool kvm_readonly_mem_allowed
;
55 extern bool kvm_direct_msi_allowed
;
57 #if defined CONFIG_KVM || !defined NEED_CPU_H
58 #define kvm_enabled() (kvm_allowed)
60 * kvm_irqchip_in_kernel:
62 * Returns: true if the user asked us to create an in-kernel
63 * irqchip via the "kernel_irqchip=on" machine option.
64 * What this actually means is architecture and machine model
65 * specific: on PC, for instance, it means that the LAPIC,
66 * IOAPIC and PIT are all in kernel. This function should never
67 * be used from generic target-independent code: use one of the
68 * following functions or some other specific check instead.
70 #define kvm_irqchip_in_kernel() (kvm_kernel_irqchip)
73 * kvm_async_interrupts_enabled:
75 * Returns: true if we can deliver interrupts to KVM
76 * asynchronously (ie by ioctl from any thread at any time)
77 * rather than having to do interrupt delivery synchronously
78 * (where the vcpu must be stopped at a suitable point first).
80 #define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed)
85 * Returns: true if halted cpus should still get a KVM_RUN ioctl to run
86 * inside of kernel space. This only works if MP state is implemented.
88 #define kvm_halt_in_kernel() (kvm_halt_in_kernel_allowed)
91 * kvm_eventfds_enabled:
93 * Returns: true if we can use eventfds to receive notifications
94 * from a KVM CPU (ie the kernel supports eventds and we are running
95 * with a configuration where it is meaningful to use them).
97 #define kvm_eventfds_enabled() (kvm_eventfds_allowed)
100 * kvm_irqfds_enabled:
102 * Returns: true if we can use irqfds to inject interrupts into
103 * a KVM CPU (ie the kernel supports irqfds and we are running
104 * with a configuration where it is meaningful to use them).
106 #define kvm_irqfds_enabled() (kvm_irqfds_allowed)
109 * kvm_resamplefds_enabled:
111 * Returns: true if we can use resamplefds to inject interrupts into
112 * a KVM CPU (ie the kernel supports resamplefds and we are running
113 * with a configuration where it is meaningful to use them).
115 #define kvm_resamplefds_enabled() (kvm_resamplefds_allowed)
118 * kvm_msi_via_irqfd_enabled:
120 * Returns: true if we can route a PCI MSI (Message Signaled Interrupt)
121 * to a KVM CPU via an irqfd. This requires that the kernel supports
122 * this and that we're running in a configuration that permits it.
124 #define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed)
127 * kvm_gsi_routing_enabled:
129 * Returns: true if GSI routing is enabled (ie the kernel supports
130 * it and we're running in a configuration that permits it).
132 #define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed)
135 * kvm_gsi_direct_mapping:
137 * Returns: true if GSI direct mapping is enabled.
139 #define kvm_gsi_direct_mapping() (kvm_gsi_direct_mapping)
142 * kvm_readonly_mem_enabled:
144 * Returns: true if KVM readonly memory is enabled (ie the kernel
145 * supports it and we're running in a configuration that permits it).
147 #define kvm_readonly_mem_enabled() (kvm_readonly_mem_allowed)
150 * kvm_direct_msi_enabled:
152 * Returns: true if KVM allows direct MSI injection.
154 #define kvm_direct_msi_enabled() (kvm_direct_msi_allowed)
157 #define kvm_enabled() (0)
158 #define kvm_irqchip_in_kernel() (false)
159 #define kvm_async_interrupts_enabled() (false)
160 #define kvm_halt_in_kernel() (false)
161 #define kvm_eventfds_enabled() (false)
162 #define kvm_irqfds_enabled() (false)
163 #define kvm_resamplefds_enabled() (false)
164 #define kvm_msi_via_irqfd_enabled() (false)
165 #define kvm_gsi_routing_allowed() (false)
166 #define kvm_gsi_direct_mapping() (false)
167 #define kvm_readonly_mem_enabled() (false)
168 #define kvm_direct_msi_enabled() (false)
172 struct kvm_lapic_state
;
173 struct kvm_irq_routing_entry
;
175 typedef struct KVMCapabilityInfo
{
180 #define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP }
181 #define KVM_CAP_LAST_INFO { NULL, 0 }
184 typedef struct KVMState KVMState
;
185 extern KVMState
*kvm_state
;
189 bool kvm_has_free_slot(MachineState
*ms
);
190 int kvm_has_sync_mmu(void);
191 int kvm_has_vcpu_events(void);
192 int kvm_has_robust_singlestep(void);
193 int kvm_has_debugregs(void);
194 int kvm_has_pit_state2(void);
195 int kvm_has_many_ioeventfds(void);
196 int kvm_has_gsi_routing(void);
197 int kvm_has_intx_set_mask(void);
199 int kvm_init_vcpu(CPUState
*cpu
);
200 int kvm_cpu_exec(CPUState
*cpu
);
204 void kvm_setup_guest_memory(void *start
, size_t size
);
205 void kvm_flush_coalesced_mmio_buffer(void);
207 int kvm_insert_breakpoint(CPUState
*cpu
, target_ulong addr
,
208 target_ulong len
, int type
);
209 int kvm_remove_breakpoint(CPUState
*cpu
, target_ulong addr
,
210 target_ulong len
, int type
);
211 void kvm_remove_all_breakpoints(CPUState
*cpu
);
212 int kvm_update_guest_debug(CPUState
*cpu
, unsigned long reinject_trap
);
214 int kvm_set_signal_mask(CPUState
*cpu
, const sigset_t
*sigset
);
217 int kvm_on_sigbus_vcpu(CPUState
*cpu
, int code
, void *addr
);
218 int kvm_on_sigbus(int code
, void *addr
);
220 /* interface with exec.c */
222 void phys_mem_set_alloc(void *(*alloc
)(size_t, uint64_t *align
));
226 int kvm_ioctl(KVMState
*s
, int type
, ...);
228 int kvm_vm_ioctl(KVMState
*s
, int type
, ...);
230 int kvm_vcpu_ioctl(CPUState
*cpu
, int type
, ...);
233 * kvm_device_ioctl - call an ioctl on a kvm device
234 * @fd: The KVM device file descriptor as returned from KVM_CREATE_DEVICE
235 * @type: The device-ctrl ioctl number
237 * Returns: -errno on error, nonnegative on success
239 int kvm_device_ioctl(int fd
, int type
, ...);
242 * kvm_vm_check_attr - check for existence of a specific vm attribute
243 * @s: The KVMState pointer
245 * @attr: the attribute of that group to query for
247 * Returns: 1 if the attribute exists
248 * 0 if the attribute either does not exist or if the vm device
249 * interface is unavailable
251 int kvm_vm_check_attr(KVMState
*s
, uint32_t group
, uint64_t attr
);
254 * kvm_device_check_attr - check for existence of a specific device attribute
255 * @fd: The device file descriptor
257 * @attr: the attribute of that group to query for
259 * Returns: 1 if the attribute exists
260 * 0 if the attribute either does not exist or if the vm device
261 * interface is unavailable
263 int kvm_device_check_attr(int fd
, uint32_t group
, uint64_t attr
);
266 * kvm_device_access - set or get value of a specific vm attribute
267 * @fd: The device file descriptor
269 * @attr: the attribute of that group to set or get
270 * @val: pointer to a storage area for the value
271 * @write: true for set and false for get operation
273 * This function is not allowed to fail. Use kvm_device_check_attr()
274 * in order to check for the availability of optional attributes.
276 void kvm_device_access(int fd
, int group
, uint64_t attr
,
277 void *val
, bool write
);
280 * kvm_create_device - create a KVM device for the device control API
281 * @KVMState: The KVMState pointer
282 * @type: The KVM device type (see Documentation/virtual/kvm/devices in the
284 * @test: If true, only test if device can be created, but don't actually
287 * Returns: -errno on error, nonnegative on success: @test ? 0 : device fd;
289 int kvm_create_device(KVMState
*s
, uint64_t type
, bool test
);
292 /* Arch specific hooks */
294 extern const KVMCapabilityInfo kvm_arch_required_capabilities
[];
296 void kvm_arch_pre_run(CPUState
*cpu
, struct kvm_run
*run
);
297 MemTxAttrs
kvm_arch_post_run(CPUState
*cpu
, struct kvm_run
*run
);
299 int kvm_arch_handle_exit(CPUState
*cpu
, struct kvm_run
*run
);
301 int kvm_arch_process_async_events(CPUState
*cpu
);
303 int kvm_arch_get_registers(CPUState
*cpu
);
305 /* state subset only touched by the VCPU itself during runtime */
306 #define KVM_PUT_RUNTIME_STATE 1
307 /* state subset modified during VCPU reset */
308 #define KVM_PUT_RESET_STATE 2
309 /* full state set, modified during initialization or on vmload */
310 #define KVM_PUT_FULL_STATE 3
312 int kvm_arch_put_registers(CPUState
*cpu
, int level
);
314 int kvm_arch_init(MachineState
*ms
, KVMState
*s
);
316 int kvm_arch_init_vcpu(CPUState
*cpu
);
318 /* Returns VCPU ID to be used on KVM_CREATE_VCPU ioctl() */
319 unsigned long kvm_arch_vcpu_id(CPUState
*cpu
);
321 int kvm_arch_on_sigbus_vcpu(CPUState
*cpu
, int code
, void *addr
);
322 int kvm_arch_on_sigbus(int code
, void *addr
);
324 void kvm_arch_init_irq_routing(KVMState
*s
);
326 int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry
*route
,
327 uint64_t address
, uint32_t data
, PCIDevice
*dev
);
329 int kvm_arch_msi_data_to_gsi(uint32_t data
);
331 int kvm_set_irq(KVMState
*s
, int irq
, int level
);
332 int kvm_irqchip_send_msi(KVMState
*s
, MSIMessage msg
);
334 void kvm_irqchip_add_irq_route(KVMState
*s
, int gsi
, int irqchip
, int pin
);
335 void kvm_irqchip_commit_routes(KVMState
*s
);
337 void kvm_put_apic_state(DeviceState
*d
, struct kvm_lapic_state
*kapic
);
338 void kvm_get_apic_state(DeviceState
*d
, struct kvm_lapic_state
*kapic
);
340 struct kvm_guest_debug
;
341 struct kvm_debug_exit_arch
;
343 struct kvm_sw_breakpoint
{
345 target_ulong saved_insn
;
347 QTAILQ_ENTRY(kvm_sw_breakpoint
) entry
;
350 QTAILQ_HEAD(kvm_sw_breakpoint_head
, kvm_sw_breakpoint
);
352 struct kvm_sw_breakpoint
*kvm_find_sw_breakpoint(CPUState
*cpu
,
355 int kvm_sw_breakpoints_active(CPUState
*cpu
);
357 int kvm_arch_insert_sw_breakpoint(CPUState
*cpu
,
358 struct kvm_sw_breakpoint
*bp
);
359 int kvm_arch_remove_sw_breakpoint(CPUState
*cpu
,
360 struct kvm_sw_breakpoint
*bp
);
361 int kvm_arch_insert_hw_breakpoint(target_ulong addr
,
362 target_ulong len
, int type
);
363 int kvm_arch_remove_hw_breakpoint(target_ulong addr
,
364 target_ulong len
, int type
);
365 void kvm_arch_remove_all_hw_breakpoints(void);
367 void kvm_arch_update_guest_debug(CPUState
*cpu
, struct kvm_guest_debug
*dbg
);
369 bool kvm_arch_stop_on_emulation_error(CPUState
*cpu
);
371 int kvm_check_extension(KVMState
*s
, unsigned int extension
);
373 int kvm_vm_check_extension(KVMState
*s
, unsigned int extension
);
375 #define kvm_vm_enable_cap(s, capability, cap_flags, ...) \
377 struct kvm_enable_cap cap = { \
379 .flags = cap_flags, \
381 uint64_t args_tmp[] = { __VA_ARGS__ }; \
383 for (i = 0; i < (int)ARRAY_SIZE(args_tmp) && \
384 i < ARRAY_SIZE(cap.args); i++) { \
385 cap.args[i] = args_tmp[i]; \
387 kvm_vm_ioctl(s, KVM_ENABLE_CAP, &cap); \
390 #define kvm_vcpu_enable_cap(cpu, capability, cap_flags, ...) \
392 struct kvm_enable_cap cap = { \
394 .flags = cap_flags, \
396 uint64_t args_tmp[] = { __VA_ARGS__ }; \
398 for (i = 0; i < (int)ARRAY_SIZE(args_tmp) && \
399 i < ARRAY_SIZE(cap.args); i++) { \
400 cap.args[i] = args_tmp[i]; \
402 kvm_vcpu_ioctl(cpu, KVM_ENABLE_CAP, &cap); \
405 uint32_t kvm_arch_get_supported_cpuid(KVMState
*env
, uint32_t function
,
406 uint32_t index
, int reg
);
408 void kvm_set_sigmask_len(KVMState
*s
, unsigned int sigmask_len
);
410 #if !defined(CONFIG_USER_ONLY)
411 int kvm_physical_memory_addr_from_host(KVMState
*s
, void *ram_addr
,
415 #endif /* NEED_CPU_H */
417 void kvm_cpu_synchronize_state(CPUState
*cpu
);
418 void kvm_cpu_synchronize_post_reset(CPUState
*cpu
);
419 void kvm_cpu_synchronize_post_init(CPUState
*cpu
);
421 /* generic hooks - to be moved/refactored once there are more users */
423 static inline void cpu_synchronize_state(CPUState
*cpu
)
426 kvm_cpu_synchronize_state(cpu
);
430 static inline void cpu_synchronize_post_reset(CPUState
*cpu
)
433 kvm_cpu_synchronize_post_reset(cpu
);
437 static inline void cpu_synchronize_post_init(CPUState
*cpu
)
440 kvm_cpu_synchronize_post_init(cpu
);
444 int kvm_irqchip_add_msi_route(KVMState
*s
, MSIMessage msg
, PCIDevice
*dev
);
445 int kvm_irqchip_update_msi_route(KVMState
*s
, int virq
, MSIMessage msg
,
447 void kvm_irqchip_release_virq(KVMState
*s
, int virq
);
449 int kvm_irqchip_add_adapter_route(KVMState
*s
, AdapterInfo
*adapter
);
451 int kvm_irqchip_add_irqfd_notifier_gsi(KVMState
*s
, EventNotifier
*n
,
452 EventNotifier
*rn
, int virq
);
453 int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState
*s
, EventNotifier
*n
,
455 int kvm_irqchip_add_irqfd_notifier(KVMState
*s
, EventNotifier
*n
,
456 EventNotifier
*rn
, qemu_irq irq
);
457 int kvm_irqchip_remove_irqfd_notifier(KVMState
*s
, EventNotifier
*n
,
459 void kvm_irqchip_set_qemuirq_gsi(KVMState
*s
, qemu_irq irq
, int gsi
);
460 void kvm_pc_gsi_handler(void *opaque
, int n
, int level
);
461 void kvm_pc_setup_irq_routing(bool pci_enabled
);
462 void kvm_init_irq_routing(KVMState
*s
);
465 * kvm_arch_irqchip_create:
466 * @KVMState: The KVMState pointer
468 * Allow architectures to create an in-kernel irq chip themselves.
470 * Returns: < 0: error
471 * 0: irq chip was not created
472 * > 0: irq chip was created
474 int kvm_arch_irqchip_create(KVMState
*s
);
477 * kvm_set_one_reg - set a register value in KVM via KVM_SET_ONE_REG ioctl
478 * @id: The register ID
479 * @source: The pointer to the value to be set. It must point to a variable
480 * of the correct type/size for the register being accessed.
482 * Returns: 0 on success, or a negative errno on failure.
484 int kvm_set_one_reg(CPUState
*cs
, uint64_t id
, void *source
);
487 * kvm_get_one_reg - get a register value from KVM via KVM_GET_ONE_REG ioctl
488 * @id: The register ID
489 * @target: The pointer where the value is to be stored. It must point to a
490 * variable of the correct type/size for the register being accessed.
492 * Returns: 0 on success, or a negative errno on failure.
494 int kvm_get_one_reg(CPUState
*cs
, uint64_t id
, void *target
);