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 "qemu/queue.h" |
18 | #include "hw/core/cpu.h" |
19 | #include "exec/memattrs.h" |
20 | |
21 | #ifdef NEED_CPU_H |
22 | # ifdef CONFIG_KVM |
23 | # include <linux/kvm.h> |
24 | # define CONFIG_KVM_IS_POSSIBLE |
25 | # endif |
26 | #else |
27 | # define CONFIG_KVM_IS_POSSIBLE |
28 | #endif |
29 | |
30 | #ifdef CONFIG_KVM_IS_POSSIBLE |
31 | |
32 | extern bool kvm_allowed; |
33 | extern bool kvm_kernel_irqchip; |
34 | extern bool kvm_split_irqchip; |
35 | extern bool kvm_async_interrupts_allowed; |
36 | extern bool kvm_halt_in_kernel_allowed; |
37 | extern bool kvm_eventfds_allowed; |
38 | extern bool kvm_irqfds_allowed; |
39 | extern bool kvm_resamplefds_allowed; |
40 | extern bool kvm_msi_via_irqfd_allowed; |
41 | extern bool kvm_gsi_routing_allowed; |
42 | extern bool kvm_gsi_direct_mapping; |
43 | extern bool kvm_readonly_mem_allowed; |
44 | extern bool kvm_direct_msi_allowed; |
45 | extern bool kvm_ioeventfd_any_length_allowed; |
46 | extern bool kvm_msi_use_devid; |
47 | |
48 | #define kvm_enabled() (kvm_allowed) |
49 | /** |
50 | * kvm_irqchip_in_kernel: |
51 | * |
52 | * Returns: true if the user asked us to create an in-kernel |
53 | * irqchip via the "kernel_irqchip=on" machine option. |
54 | * What this actually means is architecture and machine model |
55 | * specific: on PC, for instance, it means that the LAPIC, |
56 | * IOAPIC and PIT are all in kernel. This function should never |
57 | * be used from generic target-independent code: use one of the |
58 | * following functions or some other specific check instead. |
59 | */ |
60 | #define kvm_irqchip_in_kernel() (kvm_kernel_irqchip) |
61 | |
62 | /** |
63 | * kvm_irqchip_is_split: |
64 | * |
65 | * Returns: true if the user asked us to split the irqchip |
66 | * implementation between user and kernel space. The details are |
67 | * architecture and machine specific. On PC, it means that the PIC, |
68 | * IOAPIC, and PIT are in user space while the LAPIC is in the kernel. |
69 | */ |
70 | #define kvm_irqchip_is_split() (kvm_split_irqchip) |
71 | |
72 | /** |
73 | * kvm_async_interrupts_enabled: |
74 | * |
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). |
79 | */ |
80 | #define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed) |
81 | |
82 | /** |
83 | * kvm_halt_in_kernel |
84 | * |
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. |
87 | */ |
88 | #define kvm_halt_in_kernel() (kvm_halt_in_kernel_allowed) |
89 | |
90 | /** |
91 | * kvm_eventfds_enabled: |
92 | * |
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). |
96 | */ |
97 | #define kvm_eventfds_enabled() (kvm_eventfds_allowed) |
98 | |
99 | /** |
100 | * kvm_irqfds_enabled: |
101 | * |
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). |
105 | */ |
106 | #define kvm_irqfds_enabled() (kvm_irqfds_allowed) |
107 | |
108 | /** |
109 | * kvm_resamplefds_enabled: |
110 | * |
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). |
114 | */ |
115 | #define kvm_resamplefds_enabled() (kvm_resamplefds_allowed) |
116 | |
117 | /** |
118 | * kvm_msi_via_irqfd_enabled: |
119 | * |
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. |
123 | */ |
124 | #define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed) |
125 | |
126 | /** |
127 | * kvm_gsi_routing_enabled: |
128 | * |
129 | * Returns: true if GSI routing is enabled (ie the kernel supports |
130 | * it and we're running in a configuration that permits it). |
131 | */ |
132 | #define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed) |
133 | |
134 | /** |
135 | * kvm_gsi_direct_mapping: |
136 | * |
137 | * Returns: true if GSI direct mapping is enabled. |
138 | */ |
139 | #define kvm_gsi_direct_mapping() (kvm_gsi_direct_mapping) |
140 | |
141 | /** |
142 | * kvm_readonly_mem_enabled: |
143 | * |
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). |
146 | */ |
147 | #define kvm_readonly_mem_enabled() (kvm_readonly_mem_allowed) |
148 | |
149 | /** |
150 | * kvm_direct_msi_enabled: |
151 | * |
152 | * Returns: true if KVM allows direct MSI injection. |
153 | */ |
154 | #define kvm_direct_msi_enabled() (kvm_direct_msi_allowed) |
155 | |
156 | /** |
157 | * kvm_ioeventfd_any_length_enabled: |
158 | * Returns: true if KVM allows any length io eventfd. |
159 | */ |
160 | #define kvm_ioeventfd_any_length_enabled() (kvm_ioeventfd_any_length_allowed) |
161 | |
162 | /** |
163 | * kvm_msi_devid_required: |
164 | * Returns: true if KVM requires a device id to be provided while |
165 | * defining an MSI routing entry. |
166 | */ |
167 | #define kvm_msi_devid_required() (kvm_msi_use_devid) |
168 | |
169 | #else |
170 | |
171 | #define kvm_enabled() (0) |
172 | #define kvm_irqchip_in_kernel() (false) |
173 | #define kvm_irqchip_is_split() (false) |
174 | #define kvm_async_interrupts_enabled() (false) |
175 | #define kvm_halt_in_kernel() (false) |
176 | #define kvm_eventfds_enabled() (false) |
177 | #define kvm_irqfds_enabled() (false) |
178 | #define kvm_resamplefds_enabled() (false) |
179 | #define kvm_msi_via_irqfd_enabled() (false) |
180 | #define kvm_gsi_routing_allowed() (false) |
181 | #define kvm_gsi_direct_mapping() (false) |
182 | #define kvm_readonly_mem_enabled() (false) |
183 | #define kvm_direct_msi_enabled() (false) |
184 | #define kvm_ioeventfd_any_length_enabled() (false) |
185 | #define kvm_msi_devid_required() (false) |
186 | |
187 | #endif /* CONFIG_KVM_IS_POSSIBLE */ |
188 | |
189 | struct kvm_run; |
190 | struct kvm_lapic_state; |
191 | struct kvm_irq_routing_entry; |
192 | |
193 | typedef struct KVMCapabilityInfo { |
194 | const char *name; |
195 | int value; |
196 | } KVMCapabilityInfo; |
197 | |
198 | #define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP } |
199 | #define KVM_CAP_LAST_INFO { NULL, 0 } |
200 | |
201 | struct KVMState; |
202 | typedef struct KVMState KVMState; |
203 | extern KVMState *kvm_state; |
204 | |
205 | /* external API */ |
206 | |
207 | bool kvm_has_free_slot(MachineState *ms); |
208 | bool kvm_has_sync_mmu(void); |
209 | int kvm_has_vcpu_events(void); |
210 | int kvm_has_robust_singlestep(void); |
211 | int kvm_has_debugregs(void); |
212 | int kvm_max_nested_state_length(void); |
213 | int kvm_has_pit_state2(void); |
214 | int kvm_has_many_ioeventfds(void); |
215 | int kvm_has_gsi_routing(void); |
216 | int kvm_has_intx_set_mask(void); |
217 | |
218 | int kvm_init_vcpu(CPUState *cpu); |
219 | int kvm_cpu_exec(CPUState *cpu); |
220 | int kvm_destroy_vcpu(CPUState *cpu); |
221 | |
222 | /** |
223 | * kvm_arm_supports_user_irq |
224 | * |
225 | * Not all KVM implementations support notifications for kernel generated |
226 | * interrupt events to user space. This function indicates whether the current |
227 | * KVM implementation does support them. |
228 | * |
229 | * Returns: true if KVM supports using kernel generated IRQs from user space |
230 | */ |
231 | bool kvm_arm_supports_user_irq(void); |
232 | |
233 | /** |
234 | * kvm_memcrypt_enabled - return boolean indicating whether memory encryption |
235 | * is enabled |
236 | * Returns: 1 memory encryption is enabled |
237 | * 0 memory encryption is disabled |
238 | */ |
239 | bool kvm_memcrypt_enabled(void); |
240 | |
241 | /** |
242 | * kvm_memcrypt_encrypt_data: encrypt the memory range |
243 | * |
244 | * Return: 1 failed to encrypt the range |
245 | * 0 succesfully encrypted memory region |
246 | */ |
247 | int kvm_memcrypt_encrypt_data(uint8_t *ptr, uint64_t len); |
248 | |
249 | |
250 | #ifdef NEED_CPU_H |
251 | #include "cpu.h" |
252 | |
253 | void kvm_flush_coalesced_mmio_buffer(void); |
254 | |
255 | int kvm_insert_breakpoint(CPUState *cpu, target_ulong addr, |
256 | target_ulong len, int type); |
257 | int kvm_remove_breakpoint(CPUState *cpu, target_ulong addr, |
258 | target_ulong len, int type); |
259 | void kvm_remove_all_breakpoints(CPUState *cpu); |
260 | int kvm_update_guest_debug(CPUState *cpu, unsigned long reinject_trap); |
261 | |
262 | int kvm_on_sigbus_vcpu(CPUState *cpu, int code, void *addr); |
263 | int kvm_on_sigbus(int code, void *addr); |
264 | |
265 | /* interface with exec.c */ |
266 | |
267 | void phys_mem_set_alloc(void *(*alloc)(size_t, uint64_t *align, bool shared)); |
268 | |
269 | /* internal API */ |
270 | |
271 | int kvm_ioctl(KVMState *s, int type, ...); |
272 | |
273 | int kvm_vm_ioctl(KVMState *s, int type, ...); |
274 | |
275 | int kvm_vcpu_ioctl(CPUState *cpu, int type, ...); |
276 | |
277 | /** |
278 | * kvm_device_ioctl - call an ioctl on a kvm device |
279 | * @fd: The KVM device file descriptor as returned from KVM_CREATE_DEVICE |
280 | * @type: The device-ctrl ioctl number |
281 | * |
282 | * Returns: -errno on error, nonnegative on success |
283 | */ |
284 | int kvm_device_ioctl(int fd, int type, ...); |
285 | |
286 | /** |
287 | * kvm_vm_check_attr - check for existence of a specific vm attribute |
288 | * @s: The KVMState pointer |
289 | * @group: the group |
290 | * @attr: the attribute of that group to query for |
291 | * |
292 | * Returns: 1 if the attribute exists |
293 | * 0 if the attribute either does not exist or if the vm device |
294 | * interface is unavailable |
295 | */ |
296 | int kvm_vm_check_attr(KVMState *s, uint32_t group, uint64_t attr); |
297 | |
298 | /** |
299 | * kvm_device_check_attr - check for existence of a specific device attribute |
300 | * @fd: The device file descriptor |
301 | * @group: the group |
302 | * @attr: the attribute of that group to query for |
303 | * |
304 | * Returns: 1 if the attribute exists |
305 | * 0 if the attribute either does not exist or if the vm device |
306 | * interface is unavailable |
307 | */ |
308 | int kvm_device_check_attr(int fd, uint32_t group, uint64_t attr); |
309 | |
310 | /** |
311 | * kvm_device_access - set or get value of a specific vm attribute |
312 | * @fd: The device file descriptor |
313 | * @group: the group |
314 | * @attr: the attribute of that group to set or get |
315 | * @val: pointer to a storage area for the value |
316 | * @write: true for set and false for get operation |
317 | * @errp: error object handle |
318 | * |
319 | * Returns: 0 on success |
320 | * < 0 on error |
321 | * Use kvm_device_check_attr() in order to check for the availability |
322 | * of optional attributes. |
323 | */ |
324 | int kvm_device_access(int fd, int group, uint64_t attr, |
325 | void *val, bool write, Error **errp); |
326 | |
327 | /** |
328 | * kvm_create_device - create a KVM device for the device control API |
329 | * @KVMState: The KVMState pointer |
330 | * @type: The KVM device type (see Documentation/virtual/kvm/devices in the |
331 | * kernel source) |
332 | * @test: If true, only test if device can be created, but don't actually |
333 | * create the device. |
334 | * |
335 | * Returns: -errno on error, nonnegative on success: @test ? 0 : device fd; |
336 | */ |
337 | int kvm_create_device(KVMState *s, uint64_t type, bool test); |
338 | |
339 | /** |
340 | * kvm_device_supported - probe whether KVM supports specific device |
341 | * |
342 | * @vmfd: The fd handler for VM |
343 | * @type: type of device |
344 | * |
345 | * @return: true if supported, otherwise false. |
346 | */ |
347 | bool kvm_device_supported(int vmfd, uint64_t type); |
348 | |
349 | /* Arch specific hooks */ |
350 | |
351 | extern const KVMCapabilityInfo kvm_arch_required_capabilities[]; |
352 | |
353 | void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run); |
354 | MemTxAttrs kvm_arch_post_run(CPUState *cpu, struct kvm_run *run); |
355 | |
356 | int kvm_arch_handle_exit(CPUState *cpu, struct kvm_run *run); |
357 | |
358 | int kvm_arch_process_async_events(CPUState *cpu); |
359 | |
360 | int kvm_arch_get_registers(CPUState *cpu); |
361 | |
362 | /* state subset only touched by the VCPU itself during runtime */ |
363 | #define KVM_PUT_RUNTIME_STATE 1 |
364 | /* state subset modified during VCPU reset */ |
365 | #define KVM_PUT_RESET_STATE 2 |
366 | /* full state set, modified during initialization or on vmload */ |
367 | #define KVM_PUT_FULL_STATE 3 |
368 | |
369 | int kvm_arch_put_registers(CPUState *cpu, int level); |
370 | |
371 | int kvm_arch_init(MachineState *ms, KVMState *s); |
372 | |
373 | int kvm_arch_init_vcpu(CPUState *cpu); |
374 | int kvm_arch_destroy_vcpu(CPUState *cpu); |
375 | |
376 | bool kvm_vcpu_id_is_valid(int vcpu_id); |
377 | |
378 | /* Returns VCPU ID to be used on KVM_CREATE_VCPU ioctl() */ |
379 | unsigned long kvm_arch_vcpu_id(CPUState *cpu); |
380 | |
381 | #ifdef TARGET_I386 |
382 | #define KVM_HAVE_MCE_INJECTION 1 |
383 | void kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr); |
384 | #endif |
385 | |
386 | void kvm_arch_init_irq_routing(KVMState *s); |
387 | |
388 | int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route, |
389 | uint64_t address, uint32_t data, PCIDevice *dev); |
390 | |
391 | /* Notify arch about newly added MSI routes */ |
392 | int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route, |
393 | int vector, PCIDevice *dev); |
394 | /* Notify arch about released MSI routes */ |
395 | int kvm_arch_release_virq_post(int virq); |
396 | |
397 | int kvm_arch_msi_data_to_gsi(uint32_t data); |
398 | |
399 | int kvm_set_irq(KVMState *s, int irq, int level); |
400 | int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg); |
401 | |
402 | void kvm_irqchip_add_irq_route(KVMState *s, int gsi, int irqchip, int pin); |
403 | |
404 | void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic); |
405 | |
406 | struct kvm_guest_debug; |
407 | struct kvm_debug_exit_arch; |
408 | |
409 | struct kvm_sw_breakpoint { |
410 | target_ulong pc; |
411 | target_ulong saved_insn; |
412 | int use_count; |
413 | QTAILQ_ENTRY(kvm_sw_breakpoint) entry; |
414 | }; |
415 | |
416 | struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu, |
417 | target_ulong pc); |
418 | |
419 | int kvm_sw_breakpoints_active(CPUState *cpu); |
420 | |
421 | int kvm_arch_insert_sw_breakpoint(CPUState *cpu, |
422 | struct kvm_sw_breakpoint *bp); |
423 | int kvm_arch_remove_sw_breakpoint(CPUState *cpu, |
424 | struct kvm_sw_breakpoint *bp); |
425 | int kvm_arch_insert_hw_breakpoint(target_ulong addr, |
426 | target_ulong len, int type); |
427 | int kvm_arch_remove_hw_breakpoint(target_ulong addr, |
428 | target_ulong len, int type); |
429 | void kvm_arch_remove_all_hw_breakpoints(void); |
430 | |
431 | void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg); |
432 | |
433 | bool kvm_arch_stop_on_emulation_error(CPUState *cpu); |
434 | |
435 | int kvm_check_extension(KVMState *s, unsigned int extension); |
436 | |
437 | int kvm_vm_check_extension(KVMState *s, unsigned int extension); |
438 | |
439 | #define kvm_vm_enable_cap(s, capability, cap_flags, ...) \ |
440 | ({ \ |
441 | struct kvm_enable_cap cap = { \ |
442 | .cap = capability, \ |
443 | .flags = cap_flags, \ |
444 | }; \ |
445 | uint64_t args_tmp[] = { __VA_ARGS__ }; \ |
446 | size_t n = MIN(ARRAY_SIZE(args_tmp), ARRAY_SIZE(cap.args)); \ |
447 | memcpy(cap.args, args_tmp, n * sizeof(cap.args[0])); \ |
448 | kvm_vm_ioctl(s, KVM_ENABLE_CAP, &cap); \ |
449 | }) |
450 | |
451 | #define kvm_vcpu_enable_cap(cpu, capability, cap_flags, ...) \ |
452 | ({ \ |
453 | struct kvm_enable_cap cap = { \ |
454 | .cap = capability, \ |
455 | .flags = cap_flags, \ |
456 | }; \ |
457 | uint64_t args_tmp[] = { __VA_ARGS__ }; \ |
458 | size_t n = MIN(ARRAY_SIZE(args_tmp), ARRAY_SIZE(cap.args)); \ |
459 | memcpy(cap.args, args_tmp, n * sizeof(cap.args[0])); \ |
460 | kvm_vcpu_ioctl(cpu, KVM_ENABLE_CAP, &cap); \ |
461 | }) |
462 | |
463 | uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function, |
464 | uint32_t index, int reg); |
465 | uint32_t kvm_arch_get_supported_msr_feature(KVMState *s, uint32_t index); |
466 | |
467 | |
468 | void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len); |
469 | |
470 | #if !defined(CONFIG_USER_ONLY) |
471 | int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr, |
472 | hwaddr *phys_addr); |
473 | #endif |
474 | |
475 | #endif /* NEED_CPU_H */ |
476 | |
477 | void kvm_cpu_synchronize_state(CPUState *cpu); |
478 | void kvm_cpu_synchronize_post_reset(CPUState *cpu); |
479 | void kvm_cpu_synchronize_post_init(CPUState *cpu); |
480 | void kvm_cpu_synchronize_pre_loadvm(CPUState *cpu); |
481 | |
482 | void kvm_init_cpu_signals(CPUState *cpu); |
483 | |
484 | /** |
485 | * kvm_irqchip_add_msi_route - Add MSI route for specific vector |
486 | * @s: KVM state |
487 | * @vector: which vector to add. This can be either MSI/MSIX |
488 | * vector. The function will automatically detect whether |
489 | * MSI/MSIX is enabled, and fetch corresponding MSI |
490 | * message. |
491 | * @dev: Owner PCI device to add the route. If @dev is specified |
492 | * as @NULL, an empty MSI message will be inited. |
493 | * @return: virq (>=0) when success, errno (<0) when failed. |
494 | */ |
495 | int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev); |
496 | int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg, |
497 | PCIDevice *dev); |
498 | void kvm_irqchip_commit_routes(KVMState *s); |
499 | void kvm_irqchip_release_virq(KVMState *s, int virq); |
500 | |
501 | int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter); |
502 | int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint); |
503 | |
504 | int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
505 | EventNotifier *rn, int virq); |
506 | int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n, |
507 | int virq); |
508 | int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, |
509 | EventNotifier *rn, qemu_irq irq); |
510 | int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, |
511 | qemu_irq irq); |
512 | void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi); |
513 | void kvm_pc_gsi_handler(void *opaque, int n, int level); |
514 | void kvm_pc_setup_irq_routing(bool pci_enabled); |
515 | void kvm_init_irq_routing(KVMState *s); |
516 | |
517 | /** |
518 | * kvm_arch_irqchip_create: |
519 | * @KVMState: The KVMState pointer |
520 | * @MachineState: The MachineState pointer |
521 | * |
522 | * Allow architectures to create an in-kernel irq chip themselves. |
523 | * |
524 | * Returns: < 0: error |
525 | * 0: irq chip was not created |
526 | * > 0: irq chip was created |
527 | */ |
528 | int kvm_arch_irqchip_create(MachineState *ms, KVMState *s); |
529 | |
530 | /** |
531 | * kvm_set_one_reg - set a register value in KVM via KVM_SET_ONE_REG ioctl |
532 | * @id: The register ID |
533 | * @source: The pointer to the value to be set. It must point to a variable |
534 | * of the correct type/size for the register being accessed. |
535 | * |
536 | * Returns: 0 on success, or a negative errno on failure. |
537 | */ |
538 | int kvm_set_one_reg(CPUState *cs, uint64_t id, void *source); |
539 | |
540 | /** |
541 | * kvm_get_one_reg - get a register value from KVM via KVM_GET_ONE_REG ioctl |
542 | * @id: The register ID |
543 | * @target: The pointer where the value is to be stored. It must point to a |
544 | * variable of the correct type/size for the register being accessed. |
545 | * |
546 | * Returns: 0 on success, or a negative errno on failure. |
547 | */ |
548 | int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target); |
549 | struct ppc_radix_page_info *kvm_get_radix_page_info(void); |
550 | int kvm_get_max_memslots(void); |
551 | #endif |
552 | |