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"
23 #include <linux/kvm.h>
24 #include <linux/kvm_para.h>
26 /* These constants must never be used at runtime if kvm_enabled() is false.
27 * They exist so we don't need #ifdefs around KVM-specific code that already
28 * checks kvm_enabled() properly.
30 #define KVM_CPUID_SIGNATURE 0
31 #define KVM_CPUID_FEATURES 0
32 #define KVM_FEATURE_CLOCKSOURCE 0
33 #define KVM_FEATURE_NOP_IO_DELAY 0
34 #define KVM_FEATURE_MMU_OP 0
35 #define KVM_FEATURE_CLOCKSOURCE2 0
36 #define KVM_FEATURE_ASYNC_PF 0
37 #define KVM_FEATURE_STEAL_TIME 0
38 #define KVM_FEATURE_PV_EOI 0
39 #define KVM_FEATURE_CLOCKSOURCE_STABLE_BIT 0
42 extern bool kvm_allowed
;
43 extern bool kvm_kernel_irqchip
;
44 extern bool kvm_async_interrupts_allowed
;
45 extern bool kvm_halt_in_kernel_allowed
;
46 extern bool kvm_irqfds_allowed
;
47 extern bool kvm_msi_via_irqfd_allowed
;
48 extern bool kvm_gsi_routing_allowed
;
49 extern bool kvm_gsi_direct_mapping
;
50 extern bool kvm_readonly_mem_allowed
;
52 #if defined CONFIG_KVM || !defined NEED_CPU_H
53 #define kvm_enabled() (kvm_allowed)
55 * kvm_irqchip_in_kernel:
57 * Returns: true if the user asked us to create an in-kernel
58 * irqchip via the "kernel_irqchip=on" machine option.
59 * What this actually means is architecture and machine model
60 * specific: on PC, for instance, it means that the LAPIC,
61 * IOAPIC and PIT are all in kernel. This function should never
62 * be used from generic target-independent code: use one of the
63 * following functions or some other specific check instead.
65 #define kvm_irqchip_in_kernel() (kvm_kernel_irqchip)
68 * kvm_async_interrupts_enabled:
70 * Returns: true if we can deliver interrupts to KVM
71 * asynchronously (ie by ioctl from any thread at any time)
72 * rather than having to do interrupt delivery synchronously
73 * (where the vcpu must be stopped at a suitable point first).
75 #define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed)
80 * Returns: true if halted cpus should still get a KVM_RUN ioctl to run
81 * inside of kernel space. This only works if MP state is implemented.
83 #define kvm_halt_in_kernel() (kvm_halt_in_kernel_allowed)
88 * Returns: true if we can use irqfds to inject interrupts into
89 * a KVM CPU (ie the kernel supports irqfds and we are running
90 * with a configuration where it is meaningful to use them).
92 #define kvm_irqfds_enabled() (kvm_irqfds_allowed)
95 * kvm_msi_via_irqfd_enabled:
97 * Returns: true if we can route a PCI MSI (Message Signaled Interrupt)
98 * to a KVM CPU via an irqfd. This requires that the kernel supports
99 * this and that we're running in a configuration that permits it.
101 #define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed)
104 * kvm_gsi_routing_enabled:
106 * Returns: true if GSI routing is enabled (ie the kernel supports
107 * it and we're running in a configuration that permits it).
109 #define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed)
112 * kvm_gsi_direct_mapping:
114 * Returns: true if GSI direct mapping is enabled.
116 #define kvm_gsi_direct_mapping() (kvm_gsi_direct_mapping)
119 * kvm_readonly_mem_enabled:
121 * Returns: true if KVM readonly memory is enabled (ie the kernel
122 * supports it and we're running in a configuration that permits it).
124 #define kvm_readonly_mem_enabled() (kvm_readonly_mem_allowed)
127 #define kvm_enabled() (0)
128 #define kvm_irqchip_in_kernel() (false)
129 #define kvm_async_interrupts_enabled() (false)
130 #define kvm_halt_in_kernel() (false)
131 #define kvm_irqfds_enabled() (false)
132 #define kvm_msi_via_irqfd_enabled() (false)
133 #define kvm_gsi_routing_allowed() (false)
134 #define kvm_gsi_direct_mapping() (false)
135 #define kvm_readonly_mem_enabled() (false)
139 struct kvm_lapic_state
;
141 typedef struct KVMCapabilityInfo
{
146 #define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP }
147 #define KVM_CAP_LAST_INFO { NULL, 0 }
150 typedef struct KVMState KVMState
;
151 extern KVMState
*kvm_state
;
155 int kvm_init(MachineClass
*mc
);
157 int kvm_has_sync_mmu(void);
158 int kvm_has_vcpu_events(void);
159 int kvm_has_robust_singlestep(void);
160 int kvm_has_debugregs(void);
161 int kvm_has_xsave(void);
162 int kvm_has_xcrs(void);
163 int kvm_has_pit_state2(void);
164 int kvm_has_many_ioeventfds(void);
165 int kvm_has_gsi_routing(void);
166 int kvm_has_intx_set_mask(void);
168 int kvm_init_vcpu(CPUState
*cpu
);
169 int kvm_cpu_exec(CPUState
*cpu
);
173 void kvm_setup_guest_memory(void *start
, size_t size
);
174 void kvm_flush_coalesced_mmio_buffer(void);
176 int kvm_insert_breakpoint(CPUState
*cpu
, target_ulong addr
,
177 target_ulong len
, int type
);
178 int kvm_remove_breakpoint(CPUState
*cpu
, target_ulong addr
,
179 target_ulong len
, int type
);
180 void kvm_remove_all_breakpoints(CPUState
*cpu
);
181 int kvm_update_guest_debug(CPUState
*cpu
, unsigned long reinject_trap
);
183 int kvm_set_signal_mask(CPUState
*cpu
, const sigset_t
*sigset
);
186 int kvm_on_sigbus_vcpu(CPUState
*cpu
, int code
, void *addr
);
187 int kvm_on_sigbus(int code
, void *addr
);
191 int kvm_ioctl(KVMState
*s
, int type
, ...);
193 int kvm_vm_ioctl(KVMState
*s
, int type
, ...);
195 int kvm_vcpu_ioctl(CPUState
*cpu
, int type
, ...);
198 * kvm_device_ioctl - call an ioctl on a kvm device
199 * @fd: The KVM device file descriptor as returned from KVM_CREATE_DEVICE
200 * @type: The device-ctrl ioctl number
202 * Returns: -errno on error, nonnegative on success
204 int kvm_device_ioctl(int fd
, int type
, ...);
207 * kvm_create_device - create a KVM device for the device control API
208 * @KVMState: The KVMState pointer
209 * @type: The KVM device type (see Documentation/virtual/kvm/devices in the
211 * @test: If true, only test if device can be created, but don't actually
214 * Returns: -errno on error, nonnegative on success: @test ? 0 : device fd;
216 int kvm_create_device(KVMState
*s
, uint64_t type
, bool test
);
219 /* Arch specific hooks */
221 extern const KVMCapabilityInfo kvm_arch_required_capabilities
[];
223 void kvm_arch_pre_run(CPUState
*cpu
, struct kvm_run
*run
);
224 void kvm_arch_post_run(CPUState
*cpu
, struct kvm_run
*run
);
226 int kvm_arch_handle_exit(CPUState
*cpu
, struct kvm_run
*run
);
228 int kvm_arch_process_async_events(CPUState
*cpu
);
230 int kvm_arch_get_registers(CPUState
*cpu
);
232 /* state subset only touched by the VCPU itself during runtime */
233 #define KVM_PUT_RUNTIME_STATE 1
234 /* state subset modified during VCPU reset */
235 #define KVM_PUT_RESET_STATE 2
236 /* full state set, modified during initialization or on vmload */
237 #define KVM_PUT_FULL_STATE 3
239 int kvm_arch_put_registers(CPUState
*cpu
, int level
);
241 int kvm_arch_init(KVMState
*s
);
243 int kvm_arch_init_vcpu(CPUState
*cpu
);
245 /* Returns VCPU ID to be used on KVM_CREATE_VCPU ioctl() */
246 unsigned long kvm_arch_vcpu_id(CPUState
*cpu
);
248 int kvm_arch_on_sigbus_vcpu(CPUState
*cpu
, int code
, void *addr
);
249 int kvm_arch_on_sigbus(int code
, void *addr
);
251 void kvm_arch_init_irq_routing(KVMState
*s
);
253 int kvm_set_irq(KVMState
*s
, int irq
, int level
);
254 int kvm_irqchip_send_msi(KVMState
*s
, MSIMessage msg
);
256 void kvm_irqchip_add_irq_route(KVMState
*s
, int gsi
, int irqchip
, int pin
);
257 void kvm_irqchip_commit_routes(KVMState
*s
);
259 void kvm_put_apic_state(DeviceState
*d
, struct kvm_lapic_state
*kapic
);
260 void kvm_get_apic_state(DeviceState
*d
, struct kvm_lapic_state
*kapic
);
262 struct kvm_guest_debug
;
263 struct kvm_debug_exit_arch
;
265 struct kvm_sw_breakpoint
{
267 target_ulong saved_insn
;
269 QTAILQ_ENTRY(kvm_sw_breakpoint
) entry
;
272 QTAILQ_HEAD(kvm_sw_breakpoint_head
, kvm_sw_breakpoint
);
274 struct kvm_sw_breakpoint
*kvm_find_sw_breakpoint(CPUState
*cpu
,
277 int kvm_sw_breakpoints_active(CPUState
*cpu
);
279 int kvm_arch_insert_sw_breakpoint(CPUState
*cpu
,
280 struct kvm_sw_breakpoint
*bp
);
281 int kvm_arch_remove_sw_breakpoint(CPUState
*cpu
,
282 struct kvm_sw_breakpoint
*bp
);
283 int kvm_arch_insert_hw_breakpoint(target_ulong addr
,
284 target_ulong len
, int type
);
285 int kvm_arch_remove_hw_breakpoint(target_ulong addr
,
286 target_ulong len
, int type
);
287 void kvm_arch_remove_all_hw_breakpoints(void);
289 void kvm_arch_update_guest_debug(CPUState
*cpu
, struct kvm_guest_debug
*dbg
);
291 bool kvm_arch_stop_on_emulation_error(CPUState
*cpu
);
293 int kvm_check_extension(KVMState
*s
, unsigned int extension
);
295 #define kvm_vm_enable_cap(s, capability, cap_flags, ...) \
297 struct kvm_enable_cap cap = { \
299 .flags = cap_flags, \
301 uint64_t args_tmp[] = { __VA_ARGS__ }; \
303 for (i = 0; i < ARRAY_SIZE(args_tmp) && \
304 i < ARRAY_SIZE(cap.args); i++) { \
305 cap.args[i] = args_tmp[i]; \
307 kvm_vm_ioctl(s, KVM_ENABLE_CAP, &cap); \
310 #define kvm_vcpu_enable_cap(cpu, capability, cap_flags, ...) \
312 struct kvm_enable_cap cap = { \
314 .flags = cap_flags, \
316 uint64_t args_tmp[] = { __VA_ARGS__ }; \
318 for (i = 0; i < ARRAY_SIZE(args_tmp) && \
319 i < ARRAY_SIZE(cap.args); i++) { \
320 cap.args[i] = args_tmp[i]; \
322 kvm_vcpu_ioctl(cpu, KVM_ENABLE_CAP, &cap); \
325 uint32_t kvm_arch_get_supported_cpuid(KVMState
*env
, uint32_t function
,
326 uint32_t index
, int reg
);
328 #if !defined(CONFIG_USER_ONLY)
329 int kvm_physical_memory_addr_from_host(KVMState
*s
, void *ram_addr
,
333 #endif /* NEED_CPU_H */
335 void kvm_cpu_synchronize_state(CPUState
*cpu
);
336 void kvm_cpu_synchronize_post_reset(CPUState
*cpu
);
337 void kvm_cpu_synchronize_post_init(CPUState
*cpu
);
339 /* generic hooks - to be moved/refactored once there are more users */
341 static inline void cpu_synchronize_state(CPUState
*cpu
)
344 kvm_cpu_synchronize_state(cpu
);
348 static inline void cpu_synchronize_post_reset(CPUState
*cpu
)
351 kvm_cpu_synchronize_post_reset(cpu
);
355 static inline void cpu_synchronize_post_init(CPUState
*cpu
)
358 kvm_cpu_synchronize_post_init(cpu
);
362 int kvm_irqchip_add_msi_route(KVMState
*s
, MSIMessage msg
);
363 int kvm_irqchip_update_msi_route(KVMState
*s
, int virq
, MSIMessage msg
);
364 void kvm_irqchip_release_virq(KVMState
*s
, int virq
);
366 int kvm_irqchip_add_irqfd_notifier(KVMState
*s
, EventNotifier
*n
,
367 EventNotifier
*rn
, int virq
);
368 int kvm_irqchip_remove_irqfd_notifier(KVMState
*s
, EventNotifier
*n
, int virq
);
369 void kvm_pc_gsi_handler(void *opaque
, int n
, int level
);
370 void kvm_pc_setup_irq_routing(bool pci_enabled
);
371 void kvm_init_irq_routing(KVMState
*s
);
374 * kvm_arch_irqchip_create:
375 * @KVMState: The KVMState pointer
377 * Allow architectures to create an in-kernel irq chip themselves.
379 * Returns: < 0: error
380 * 0: irq chip was not created
381 * > 0: irq chip was created
383 int kvm_arch_irqchip_create(KVMState
*s
);
386 * kvm_set_one_reg - set a register value in KVM via KVM_SET_ONE_REG ioctl
387 * @id: The register ID
388 * @source: The pointer to the value to be set. It must point to a variable
389 * of the correct type/size for the register being accessed.
391 * Returns: 0 on success, or a negative errno on failure.
393 int kvm_set_one_reg(CPUState
*cs
, uint64_t id
, void *source
);
396 * kvm_get_one_reg - get a register value from KVM via KVM_GET_ONE_REG ioctl
397 * @id: The register ID
398 * @target: The pointer where the value is to be stored. It must point to a
399 * variable of the correct type/size for the register being accessed.
401 * Returns: 0 on success, or a negative errno on failure.
403 int kvm_get_one_reg(CPUState
*cs
, uint64_t id
, void *target
);