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749cf76c CD |
1 | /* |
2 | * Copyright (C) 2012 - Virtual Open Systems and Columbia University | |
3 | * Author: Christoffer Dall <c.dall@virtualopensystems.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License, version 2, as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
17 | */ | |
18 | ||
19 | #include <linux/errno.h> | |
20 | #include <linux/err.h> | |
21 | #include <linux/kvm_host.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/vmalloc.h> | |
24 | #include <linux/fs.h> | |
25 | #include <linux/mman.h> | |
26 | #include <linux/sched.h> | |
86ce8535 | 27 | #include <linux/kvm.h> |
749cf76c CD |
28 | #include <trace/events/kvm.h> |
29 | ||
30 | #define CREATE_TRACE_POINTS | |
31 | #include "trace.h" | |
32 | ||
33 | #include <asm/unified.h> | |
34 | #include <asm/uaccess.h> | |
35 | #include <asm/ptrace.h> | |
36 | #include <asm/mman.h> | |
37 | #include <asm/cputype.h> | |
342cd0ab CD |
38 | #include <asm/tlbflush.h> |
39 | #include <asm/virt.h> | |
40 | #include <asm/kvm_arm.h> | |
41 | #include <asm/kvm_asm.h> | |
42 | #include <asm/kvm_mmu.h> | |
749cf76c CD |
43 | |
44 | #ifdef REQUIRES_VIRT | |
45 | __asm__(".arch_extension virt"); | |
46 | #endif | |
47 | ||
342cd0ab CD |
48 | static DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page); |
49 | static struct vfp_hard_struct __percpu *kvm_host_vfp_state; | |
50 | static unsigned long hyp_default_vectors; | |
51 | ||
52 | ||
749cf76c CD |
53 | int kvm_arch_hardware_enable(void *garbage) |
54 | { | |
55 | return 0; | |
56 | } | |
57 | ||
58 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) | |
59 | { | |
60 | return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; | |
61 | } | |
62 | ||
63 | void kvm_arch_hardware_disable(void *garbage) | |
64 | { | |
65 | } | |
66 | ||
67 | int kvm_arch_hardware_setup(void) | |
68 | { | |
69 | return 0; | |
70 | } | |
71 | ||
72 | void kvm_arch_hardware_unsetup(void) | |
73 | { | |
74 | } | |
75 | ||
76 | void kvm_arch_check_processor_compat(void *rtn) | |
77 | { | |
78 | *(int *)rtn = 0; | |
79 | } | |
80 | ||
81 | void kvm_arch_sync_events(struct kvm *kvm) | |
82 | { | |
83 | } | |
84 | ||
d5d8184d CD |
85 | /** |
86 | * kvm_arch_init_vm - initializes a VM data structure | |
87 | * @kvm: pointer to the KVM struct | |
88 | */ | |
749cf76c CD |
89 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
90 | { | |
d5d8184d CD |
91 | int ret = 0; |
92 | ||
749cf76c CD |
93 | if (type) |
94 | return -EINVAL; | |
95 | ||
d5d8184d CD |
96 | ret = kvm_alloc_stage2_pgd(kvm); |
97 | if (ret) | |
98 | goto out_fail_alloc; | |
99 | ||
100 | ret = create_hyp_mappings(kvm, kvm + 1); | |
101 | if (ret) | |
102 | goto out_free_stage2_pgd; | |
103 | ||
104 | /* Mark the initial VMID generation invalid */ | |
105 | kvm->arch.vmid_gen = 0; | |
106 | ||
107 | return ret; | |
108 | out_free_stage2_pgd: | |
109 | kvm_free_stage2_pgd(kvm); | |
110 | out_fail_alloc: | |
111 | return ret; | |
749cf76c CD |
112 | } |
113 | ||
114 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) | |
115 | { | |
116 | return VM_FAULT_SIGBUS; | |
117 | } | |
118 | ||
119 | void kvm_arch_free_memslot(struct kvm_memory_slot *free, | |
120 | struct kvm_memory_slot *dont) | |
121 | { | |
122 | } | |
123 | ||
124 | int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) | |
125 | { | |
126 | return 0; | |
127 | } | |
128 | ||
d5d8184d CD |
129 | /** |
130 | * kvm_arch_destroy_vm - destroy the VM data structure | |
131 | * @kvm: pointer to the KVM struct | |
132 | */ | |
749cf76c CD |
133 | void kvm_arch_destroy_vm(struct kvm *kvm) |
134 | { | |
135 | int i; | |
136 | ||
d5d8184d CD |
137 | kvm_free_stage2_pgd(kvm); |
138 | ||
749cf76c CD |
139 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
140 | if (kvm->vcpus[i]) { | |
141 | kvm_arch_vcpu_free(kvm->vcpus[i]); | |
142 | kvm->vcpus[i] = NULL; | |
143 | } | |
144 | } | |
145 | } | |
146 | ||
147 | int kvm_dev_ioctl_check_extension(long ext) | |
148 | { | |
149 | int r; | |
150 | switch (ext) { | |
151 | case KVM_CAP_USER_MEMORY: | |
152 | case KVM_CAP_SYNC_MMU: | |
153 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: | |
154 | case KVM_CAP_ONE_REG: | |
155 | r = 1; | |
156 | break; | |
157 | case KVM_CAP_COALESCED_MMIO: | |
158 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
159 | break; | |
160 | case KVM_CAP_NR_VCPUS: | |
161 | r = num_online_cpus(); | |
162 | break; | |
163 | case KVM_CAP_MAX_VCPUS: | |
164 | r = KVM_MAX_VCPUS; | |
165 | break; | |
166 | default: | |
167 | r = 0; | |
168 | break; | |
169 | } | |
170 | return r; | |
171 | } | |
172 | ||
173 | long kvm_arch_dev_ioctl(struct file *filp, | |
174 | unsigned int ioctl, unsigned long arg) | |
175 | { | |
176 | return -EINVAL; | |
177 | } | |
178 | ||
179 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
180 | struct kvm_userspace_memory_region *mem, | |
181 | struct kvm_memory_slot old, | |
182 | int user_alloc) | |
183 | { | |
184 | return 0; | |
185 | } | |
186 | ||
187 | int kvm_arch_prepare_memory_region(struct kvm *kvm, | |
188 | struct kvm_memory_slot *memslot, | |
189 | struct kvm_memory_slot old, | |
190 | struct kvm_userspace_memory_region *mem, | |
191 | int user_alloc) | |
192 | { | |
193 | return 0; | |
194 | } | |
195 | ||
196 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
197 | struct kvm_userspace_memory_region *mem, | |
198 | struct kvm_memory_slot old, | |
199 | int user_alloc) | |
200 | { | |
201 | } | |
202 | ||
203 | void kvm_arch_flush_shadow_all(struct kvm *kvm) | |
204 | { | |
205 | } | |
206 | ||
207 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, | |
208 | struct kvm_memory_slot *slot) | |
209 | { | |
210 | } | |
211 | ||
212 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) | |
213 | { | |
214 | int err; | |
215 | struct kvm_vcpu *vcpu; | |
216 | ||
217 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); | |
218 | if (!vcpu) { | |
219 | err = -ENOMEM; | |
220 | goto out; | |
221 | } | |
222 | ||
223 | err = kvm_vcpu_init(vcpu, kvm, id); | |
224 | if (err) | |
225 | goto free_vcpu; | |
226 | ||
d5d8184d CD |
227 | err = create_hyp_mappings(vcpu, vcpu + 1); |
228 | if (err) | |
229 | goto vcpu_uninit; | |
230 | ||
749cf76c | 231 | return vcpu; |
d5d8184d CD |
232 | vcpu_uninit: |
233 | kvm_vcpu_uninit(vcpu); | |
749cf76c CD |
234 | free_vcpu: |
235 | kmem_cache_free(kvm_vcpu_cache, vcpu); | |
236 | out: | |
237 | return ERR_PTR(err); | |
238 | } | |
239 | ||
240 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) | |
241 | { | |
242 | return 0; | |
243 | } | |
244 | ||
245 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
246 | { | |
d5d8184d CD |
247 | kvm_mmu_free_memory_caches(vcpu); |
248 | kmem_cache_free(kvm_vcpu_cache, vcpu); | |
749cf76c CD |
249 | } |
250 | ||
251 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) | |
252 | { | |
253 | kvm_arch_vcpu_free(vcpu); | |
254 | } | |
255 | ||
256 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) | |
257 | { | |
258 | return 0; | |
259 | } | |
260 | ||
261 | int __attribute_const__ kvm_target_cpu(void) | |
262 | { | |
263 | unsigned long implementor = read_cpuid_implementor(); | |
264 | unsigned long part_number = read_cpuid_part_number(); | |
265 | ||
266 | if (implementor != ARM_CPU_IMP_ARM) | |
267 | return -EINVAL; | |
268 | ||
269 | switch (part_number) { | |
270 | case ARM_CPU_PART_CORTEX_A15: | |
271 | return KVM_ARM_TARGET_CORTEX_A15; | |
272 | default: | |
273 | return -EINVAL; | |
274 | } | |
275 | } | |
276 | ||
277 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
278 | { | |
279 | return 0; | |
280 | } | |
281 | ||
282 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
283 | { | |
284 | } | |
285 | ||
286 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
287 | { | |
86ce8535 | 288 | vcpu->cpu = cpu; |
749cf76c CD |
289 | } |
290 | ||
291 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
292 | { | |
293 | } | |
294 | ||
295 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, | |
296 | struct kvm_guest_debug *dbg) | |
297 | { | |
298 | return -EINVAL; | |
299 | } | |
300 | ||
301 | ||
302 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, | |
303 | struct kvm_mp_state *mp_state) | |
304 | { | |
305 | return -EINVAL; | |
306 | } | |
307 | ||
308 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
309 | struct kvm_mp_state *mp_state) | |
310 | { | |
311 | return -EINVAL; | |
312 | } | |
313 | ||
314 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) | |
315 | { | |
316 | return 0; | |
317 | } | |
318 | ||
319 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
320 | { | |
321 | return -EINVAL; | |
322 | } | |
323 | ||
86ce8535 CD |
324 | static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level) |
325 | { | |
326 | int bit_index; | |
327 | bool set; | |
328 | unsigned long *ptr; | |
329 | ||
330 | if (number == KVM_ARM_IRQ_CPU_IRQ) | |
331 | bit_index = __ffs(HCR_VI); | |
332 | else /* KVM_ARM_IRQ_CPU_FIQ */ | |
333 | bit_index = __ffs(HCR_VF); | |
334 | ||
335 | ptr = (unsigned long *)&vcpu->arch.irq_lines; | |
336 | if (level) | |
337 | set = test_and_set_bit(bit_index, ptr); | |
338 | else | |
339 | set = test_and_clear_bit(bit_index, ptr); | |
340 | ||
341 | /* | |
342 | * If we didn't change anything, no need to wake up or kick other CPUs | |
343 | */ | |
344 | if (set == level) | |
345 | return 0; | |
346 | ||
347 | /* | |
348 | * The vcpu irq_lines field was updated, wake up sleeping VCPUs and | |
349 | * trigger a world-switch round on the running physical CPU to set the | |
350 | * virtual IRQ/FIQ fields in the HCR appropriately. | |
351 | */ | |
352 | kvm_vcpu_kick(vcpu); | |
353 | ||
354 | return 0; | |
355 | } | |
356 | ||
357 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level) | |
358 | { | |
359 | u32 irq = irq_level->irq; | |
360 | unsigned int irq_type, vcpu_idx, irq_num; | |
361 | int nrcpus = atomic_read(&kvm->online_vcpus); | |
362 | struct kvm_vcpu *vcpu = NULL; | |
363 | bool level = irq_level->level; | |
364 | ||
365 | irq_type = (irq >> KVM_ARM_IRQ_TYPE_SHIFT) & KVM_ARM_IRQ_TYPE_MASK; | |
366 | vcpu_idx = (irq >> KVM_ARM_IRQ_VCPU_SHIFT) & KVM_ARM_IRQ_VCPU_MASK; | |
367 | irq_num = (irq >> KVM_ARM_IRQ_NUM_SHIFT) & KVM_ARM_IRQ_NUM_MASK; | |
368 | ||
369 | trace_kvm_irq_line(irq_type, vcpu_idx, irq_num, irq_level->level); | |
370 | ||
371 | if (irq_type != KVM_ARM_IRQ_TYPE_CPU) | |
372 | return -EINVAL; | |
373 | ||
374 | if (vcpu_idx >= nrcpus) | |
375 | return -EINVAL; | |
376 | ||
377 | vcpu = kvm_get_vcpu(kvm, vcpu_idx); | |
378 | if (!vcpu) | |
379 | return -EINVAL; | |
380 | ||
381 | if (irq_num > KVM_ARM_IRQ_CPU_FIQ) | |
382 | return -EINVAL; | |
383 | ||
384 | return vcpu_interrupt_line(vcpu, irq_num, level); | |
385 | } | |
386 | ||
749cf76c CD |
387 | long kvm_arch_vcpu_ioctl(struct file *filp, |
388 | unsigned int ioctl, unsigned long arg) | |
389 | { | |
390 | struct kvm_vcpu *vcpu = filp->private_data; | |
391 | void __user *argp = (void __user *)arg; | |
392 | ||
393 | switch (ioctl) { | |
394 | case KVM_ARM_VCPU_INIT: { | |
395 | struct kvm_vcpu_init init; | |
396 | ||
397 | if (copy_from_user(&init, argp, sizeof(init))) | |
398 | return -EFAULT; | |
399 | ||
400 | return kvm_vcpu_set_target(vcpu, &init); | |
401 | ||
402 | } | |
403 | case KVM_SET_ONE_REG: | |
404 | case KVM_GET_ONE_REG: { | |
405 | struct kvm_one_reg reg; | |
406 | if (copy_from_user(®, argp, sizeof(reg))) | |
407 | return -EFAULT; | |
408 | if (ioctl == KVM_SET_ONE_REG) | |
409 | return kvm_arm_set_reg(vcpu, ®); | |
410 | else | |
411 | return kvm_arm_get_reg(vcpu, ®); | |
412 | } | |
413 | case KVM_GET_REG_LIST: { | |
414 | struct kvm_reg_list __user *user_list = argp; | |
415 | struct kvm_reg_list reg_list; | |
416 | unsigned n; | |
417 | ||
418 | if (copy_from_user(®_list, user_list, sizeof(reg_list))) | |
419 | return -EFAULT; | |
420 | n = reg_list.n; | |
421 | reg_list.n = kvm_arm_num_regs(vcpu); | |
422 | if (copy_to_user(user_list, ®_list, sizeof(reg_list))) | |
423 | return -EFAULT; | |
424 | if (n < reg_list.n) | |
425 | return -E2BIG; | |
426 | return kvm_arm_copy_reg_indices(vcpu, user_list->reg); | |
427 | } | |
428 | default: | |
429 | return -EINVAL; | |
430 | } | |
431 | } | |
432 | ||
433 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) | |
434 | { | |
435 | return -EINVAL; | |
436 | } | |
437 | ||
438 | long kvm_arch_vm_ioctl(struct file *filp, | |
439 | unsigned int ioctl, unsigned long arg) | |
440 | { | |
441 | return -EINVAL; | |
442 | } | |
443 | ||
342cd0ab CD |
444 | static void cpu_init_hyp_mode(void *vector) |
445 | { | |
446 | unsigned long long pgd_ptr; | |
447 | unsigned long pgd_low, pgd_high; | |
448 | unsigned long hyp_stack_ptr; | |
449 | unsigned long stack_page; | |
450 | unsigned long vector_ptr; | |
451 | ||
452 | /* Switch from the HYP stub to our own HYP init vector */ | |
453 | __hyp_set_vectors((unsigned long)vector); | |
454 | ||
455 | pgd_ptr = (unsigned long long)kvm_mmu_get_httbr(); | |
456 | pgd_low = (pgd_ptr & ((1ULL << 32) - 1)); | |
457 | pgd_high = (pgd_ptr >> 32ULL); | |
458 | stack_page = __get_cpu_var(kvm_arm_hyp_stack_page); | |
459 | hyp_stack_ptr = stack_page + PAGE_SIZE; | |
460 | vector_ptr = (unsigned long)__kvm_hyp_vector; | |
461 | ||
462 | /* | |
463 | * Call initialization code, and switch to the full blown | |
464 | * HYP code. The init code doesn't need to preserve these registers as | |
465 | * r1-r3 and r12 are already callee save according to the AAPCS. | |
466 | * Note that we slightly misuse the prototype by casing the pgd_low to | |
467 | * a void *. | |
468 | */ | |
469 | kvm_call_hyp((void *)pgd_low, pgd_high, hyp_stack_ptr, vector_ptr); | |
470 | } | |
471 | ||
472 | /** | |
473 | * Inits Hyp-mode on all online CPUs | |
474 | */ | |
475 | static int init_hyp_mode(void) | |
476 | { | |
477 | phys_addr_t init_phys_addr; | |
478 | int cpu; | |
479 | int err = 0; | |
480 | ||
481 | /* | |
482 | * Allocate Hyp PGD and setup Hyp identity mapping | |
483 | */ | |
484 | err = kvm_mmu_init(); | |
485 | if (err) | |
486 | goto out_err; | |
487 | ||
488 | /* | |
489 | * It is probably enough to obtain the default on one | |
490 | * CPU. It's unlikely to be different on the others. | |
491 | */ | |
492 | hyp_default_vectors = __hyp_get_vectors(); | |
493 | ||
494 | /* | |
495 | * Allocate stack pages for Hypervisor-mode | |
496 | */ | |
497 | for_each_possible_cpu(cpu) { | |
498 | unsigned long stack_page; | |
499 | ||
500 | stack_page = __get_free_page(GFP_KERNEL); | |
501 | if (!stack_page) { | |
502 | err = -ENOMEM; | |
503 | goto out_free_stack_pages; | |
504 | } | |
505 | ||
506 | per_cpu(kvm_arm_hyp_stack_page, cpu) = stack_page; | |
507 | } | |
508 | ||
509 | /* | |
510 | * Execute the init code on each CPU. | |
511 | * | |
512 | * Note: The stack is not mapped yet, so don't do anything else than | |
513 | * initializing the hypervisor mode on each CPU using a local stack | |
514 | * space for temporary storage. | |
515 | */ | |
516 | init_phys_addr = virt_to_phys(__kvm_hyp_init); | |
517 | for_each_online_cpu(cpu) { | |
518 | smp_call_function_single(cpu, cpu_init_hyp_mode, | |
519 | (void *)(long)init_phys_addr, 1); | |
520 | } | |
521 | ||
522 | /* | |
523 | * Unmap the identity mapping | |
524 | */ | |
525 | kvm_clear_hyp_idmap(); | |
526 | ||
527 | /* | |
528 | * Map the Hyp-code called directly from the host | |
529 | */ | |
530 | err = create_hyp_mappings(__kvm_hyp_code_start, __kvm_hyp_code_end); | |
531 | if (err) { | |
532 | kvm_err("Cannot map world-switch code\n"); | |
533 | goto out_free_mappings; | |
534 | } | |
535 | ||
536 | /* | |
537 | * Map the Hyp stack pages | |
538 | */ | |
539 | for_each_possible_cpu(cpu) { | |
540 | char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu); | |
541 | err = create_hyp_mappings(stack_page, stack_page + PAGE_SIZE); | |
542 | ||
543 | if (err) { | |
544 | kvm_err("Cannot map hyp stack\n"); | |
545 | goto out_free_mappings; | |
546 | } | |
547 | } | |
548 | ||
549 | /* | |
550 | * Map the host VFP structures | |
551 | */ | |
552 | kvm_host_vfp_state = alloc_percpu(struct vfp_hard_struct); | |
553 | if (!kvm_host_vfp_state) { | |
554 | err = -ENOMEM; | |
555 | kvm_err("Cannot allocate host VFP state\n"); | |
556 | goto out_free_mappings; | |
557 | } | |
558 | ||
559 | for_each_possible_cpu(cpu) { | |
560 | struct vfp_hard_struct *vfp; | |
561 | ||
562 | vfp = per_cpu_ptr(kvm_host_vfp_state, cpu); | |
563 | err = create_hyp_mappings(vfp, vfp + 1); | |
564 | ||
565 | if (err) { | |
566 | kvm_err("Cannot map host VFP state: %d\n", err); | |
567 | goto out_free_vfp; | |
568 | } | |
569 | } | |
570 | ||
571 | kvm_info("Hyp mode initialized successfully\n"); | |
572 | return 0; | |
573 | out_free_vfp: | |
574 | free_percpu(kvm_host_vfp_state); | |
575 | out_free_mappings: | |
576 | free_hyp_pmds(); | |
577 | out_free_stack_pages: | |
578 | for_each_possible_cpu(cpu) | |
579 | free_page(per_cpu(kvm_arm_hyp_stack_page, cpu)); | |
580 | out_err: | |
581 | kvm_err("error initializing Hyp mode: %d\n", err); | |
582 | return err; | |
583 | } | |
584 | ||
585 | /** | |
586 | * Initialize Hyp-mode and memory mappings on all CPUs. | |
587 | */ | |
749cf76c CD |
588 | int kvm_arch_init(void *opaque) |
589 | { | |
342cd0ab CD |
590 | int err; |
591 | ||
592 | if (!is_hyp_mode_available()) { | |
593 | kvm_err("HYP mode not available\n"); | |
594 | return -ENODEV; | |
595 | } | |
596 | ||
597 | if (kvm_target_cpu() < 0) { | |
598 | kvm_err("Target CPU not supported!\n"); | |
599 | return -ENODEV; | |
600 | } | |
601 | ||
602 | err = init_hyp_mode(); | |
603 | if (err) | |
604 | goto out_err; | |
605 | ||
749cf76c | 606 | return 0; |
342cd0ab CD |
607 | out_err: |
608 | return err; | |
749cf76c CD |
609 | } |
610 | ||
611 | /* NOP: Compiling as a module not supported */ | |
612 | void kvm_arch_exit(void) | |
613 | { | |
614 | } | |
615 | ||
616 | static int arm_init(void) | |
617 | { | |
618 | int rc = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); | |
619 | return rc; | |
620 | } | |
621 | ||
622 | module_init(arm_init); |