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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 | ||
d157f4a5 | 19 | #include <linux/cpu.h> |
1fcf7ce0 | 20 | #include <linux/cpu_pm.h> |
749cf76c CD |
21 | #include <linux/errno.h> |
22 | #include <linux/err.h> | |
23 | #include <linux/kvm_host.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/vmalloc.h> | |
26 | #include <linux/fs.h> | |
27 | #include <linux/mman.h> | |
28 | #include <linux/sched.h> | |
86ce8535 | 29 | #include <linux/kvm.h> |
749cf76c CD |
30 | #include <trace/events/kvm.h> |
31 | ||
32 | #define CREATE_TRACE_POINTS | |
33 | #include "trace.h" | |
34 | ||
749cf76c CD |
35 | #include <asm/uaccess.h> |
36 | #include <asm/ptrace.h> | |
37 | #include <asm/mman.h> | |
342cd0ab | 38 | #include <asm/tlbflush.h> |
5b3e5e5b | 39 | #include <asm/cacheflush.h> |
342cd0ab CD |
40 | #include <asm/virt.h> |
41 | #include <asm/kvm_arm.h> | |
42 | #include <asm/kvm_asm.h> | |
43 | #include <asm/kvm_mmu.h> | |
f7ed45be | 44 | #include <asm/kvm_emulate.h> |
5b3e5e5b | 45 | #include <asm/kvm_coproc.h> |
aa024c2f | 46 | #include <asm/kvm_psci.h> |
749cf76c CD |
47 | |
48 | #ifdef REQUIRES_VIRT | |
49 | __asm__(".arch_extension virt"); | |
50 | #endif | |
51 | ||
342cd0ab | 52 | static DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page); |
3de50da6 | 53 | static kvm_cpu_context_t __percpu *kvm_host_cpu_state; |
342cd0ab CD |
54 | static unsigned long hyp_default_vectors; |
55 | ||
1638a12d MZ |
56 | /* Per-CPU variable containing the currently running vcpu. */ |
57 | static DEFINE_PER_CPU(struct kvm_vcpu *, kvm_arm_running_vcpu); | |
58 | ||
f7ed45be CD |
59 | /* The VMID used in the VTTBR */ |
60 | static atomic64_t kvm_vmid_gen = ATOMIC64_INIT(1); | |
61 | static u8 kvm_next_vmid; | |
62 | static DEFINE_SPINLOCK(kvm_vmid_lock); | |
342cd0ab | 63 | |
1a89dd91 MZ |
64 | static bool vgic_present; |
65 | ||
1638a12d MZ |
66 | static void kvm_arm_set_running_vcpu(struct kvm_vcpu *vcpu) |
67 | { | |
68 | BUG_ON(preemptible()); | |
1436c1aa | 69 | __this_cpu_write(kvm_arm_running_vcpu, vcpu); |
1638a12d MZ |
70 | } |
71 | ||
72 | /** | |
73 | * kvm_arm_get_running_vcpu - get the vcpu running on the current CPU. | |
74 | * Must be called from non-preemptible context | |
75 | */ | |
76 | struct kvm_vcpu *kvm_arm_get_running_vcpu(void) | |
77 | { | |
78 | BUG_ON(preemptible()); | |
1436c1aa | 79 | return __this_cpu_read(kvm_arm_running_vcpu); |
1638a12d MZ |
80 | } |
81 | ||
82 | /** | |
83 | * kvm_arm_get_running_vcpus - get the per-CPU array of currently running vcpus. | |
84 | */ | |
4000be42 | 85 | struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void) |
1638a12d MZ |
86 | { |
87 | return &kvm_arm_running_vcpu; | |
88 | } | |
89 | ||
13a34e06 | 90 | int kvm_arch_hardware_enable(void) |
749cf76c CD |
91 | { |
92 | return 0; | |
93 | } | |
94 | ||
95 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) | |
96 | { | |
97 | return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; | |
98 | } | |
99 | ||
749cf76c CD |
100 | int kvm_arch_hardware_setup(void) |
101 | { | |
102 | return 0; | |
103 | } | |
104 | ||
749cf76c CD |
105 | void kvm_arch_check_processor_compat(void *rtn) |
106 | { | |
107 | *(int *)rtn = 0; | |
108 | } | |
109 | ||
749cf76c | 110 | |
d5d8184d CD |
111 | /** |
112 | * kvm_arch_init_vm - initializes a VM data structure | |
113 | * @kvm: pointer to the KVM struct | |
114 | */ | |
749cf76c CD |
115 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
116 | { | |
d5d8184d CD |
117 | int ret = 0; |
118 | ||
749cf76c CD |
119 | if (type) |
120 | return -EINVAL; | |
121 | ||
d5d8184d CD |
122 | ret = kvm_alloc_stage2_pgd(kvm); |
123 | if (ret) | |
124 | goto out_fail_alloc; | |
125 | ||
126 | ret = create_hyp_mappings(kvm, kvm + 1); | |
127 | if (ret) | |
128 | goto out_free_stage2_pgd; | |
129 | ||
a1a64387 CD |
130 | kvm_timer_init(kvm); |
131 | ||
d5d8184d CD |
132 | /* Mark the initial VMID generation invalid */ |
133 | kvm->arch.vmid_gen = 0; | |
134 | ||
135 | return ret; | |
136 | out_free_stage2_pgd: | |
137 | kvm_free_stage2_pgd(kvm); | |
138 | out_fail_alloc: | |
139 | return ret; | |
749cf76c CD |
140 | } |
141 | ||
142 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) | |
143 | { | |
144 | return VM_FAULT_SIGBUS; | |
145 | } | |
146 | ||
749cf76c | 147 | |
d5d8184d CD |
148 | /** |
149 | * kvm_arch_destroy_vm - destroy the VM data structure | |
150 | * @kvm: pointer to the KVM struct | |
151 | */ | |
749cf76c CD |
152 | void kvm_arch_destroy_vm(struct kvm *kvm) |
153 | { | |
154 | int i; | |
155 | ||
d5d8184d CD |
156 | kvm_free_stage2_pgd(kvm); |
157 | ||
749cf76c CD |
158 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
159 | if (kvm->vcpus[i]) { | |
160 | kvm_arch_vcpu_free(kvm->vcpus[i]); | |
161 | kvm->vcpus[i] = NULL; | |
162 | } | |
163 | } | |
c1bfb577 MZ |
164 | |
165 | kvm_vgic_destroy(kvm); | |
749cf76c CD |
166 | } |
167 | ||
784aa3d7 | 168 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
749cf76c CD |
169 | { |
170 | int r; | |
171 | switch (ext) { | |
1a89dd91 MZ |
172 | case KVM_CAP_IRQCHIP: |
173 | r = vgic_present; | |
174 | break; | |
7330672b | 175 | case KVM_CAP_DEVICE_CTRL: |
749cf76c CD |
176 | case KVM_CAP_USER_MEMORY: |
177 | case KVM_CAP_SYNC_MMU: | |
178 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: | |
179 | case KVM_CAP_ONE_REG: | |
aa024c2f | 180 | case KVM_CAP_ARM_PSCI: |
4447a208 | 181 | case KVM_CAP_ARM_PSCI_0_2: |
98047888 | 182 | case KVM_CAP_READONLY_MEM: |
749cf76c CD |
183 | r = 1; |
184 | break; | |
185 | case KVM_CAP_COALESCED_MMIO: | |
186 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
187 | break; | |
3401d546 CD |
188 | case KVM_CAP_ARM_SET_DEVICE_ADDR: |
189 | r = 1; | |
ca46e10f | 190 | break; |
749cf76c CD |
191 | case KVM_CAP_NR_VCPUS: |
192 | r = num_online_cpus(); | |
193 | break; | |
194 | case KVM_CAP_MAX_VCPUS: | |
195 | r = KVM_MAX_VCPUS; | |
196 | break; | |
197 | default: | |
17b1e31f | 198 | r = kvm_arch_dev_ioctl_check_extension(ext); |
749cf76c CD |
199 | break; |
200 | } | |
201 | return r; | |
202 | } | |
203 | ||
204 | long kvm_arch_dev_ioctl(struct file *filp, | |
205 | unsigned int ioctl, unsigned long arg) | |
206 | { | |
207 | return -EINVAL; | |
208 | } | |
209 | ||
749cf76c CD |
210 | |
211 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) | |
212 | { | |
213 | int err; | |
214 | struct kvm_vcpu *vcpu; | |
215 | ||
216 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); | |
217 | if (!vcpu) { | |
218 | err = -ENOMEM; | |
219 | goto out; | |
220 | } | |
221 | ||
222 | err = kvm_vcpu_init(vcpu, kvm, id); | |
223 | if (err) | |
224 | goto free_vcpu; | |
225 | ||
d5d8184d CD |
226 | err = create_hyp_mappings(vcpu, vcpu + 1); |
227 | if (err) | |
228 | goto vcpu_uninit; | |
229 | ||
749cf76c | 230 | return vcpu; |
d5d8184d CD |
231 | vcpu_uninit: |
232 | kvm_vcpu_uninit(vcpu); | |
749cf76c CD |
233 | free_vcpu: |
234 | kmem_cache_free(kvm_vcpu_cache, vcpu); | |
235 | out: | |
236 | return ERR_PTR(err); | |
237 | } | |
238 | ||
239 | int kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) | |
240 | { | |
241 | return 0; | |
242 | } | |
243 | ||
244 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
245 | { | |
d5d8184d | 246 | kvm_mmu_free_memory_caches(vcpu); |
967f8427 | 247 | kvm_timer_vcpu_terminate(vcpu); |
c1bfb577 | 248 | kvm_vgic_vcpu_destroy(vcpu); |
d5d8184d | 249 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
749cf76c CD |
250 | } |
251 | ||
252 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) | |
253 | { | |
254 | kvm_arch_vcpu_free(vcpu); | |
255 | } | |
256 | ||
257 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) | |
258 | { | |
259 | return 0; | |
260 | } | |
261 | ||
749cf76c CD |
262 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
263 | { | |
f7ed45be CD |
264 | /* Force users to call KVM_ARM_VCPU_INIT */ |
265 | vcpu->arch.target = -1; | |
f7fa034d | 266 | bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES); |
1a89dd91 | 267 | |
967f8427 MZ |
268 | /* Set up the timer */ |
269 | kvm_timer_vcpu_init(vcpu); | |
270 | ||
749cf76c CD |
271 | return 0; |
272 | } | |
273 | ||
749cf76c CD |
274 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
275 | { | |
86ce8535 | 276 | vcpu->cpu = cpu; |
3de50da6 | 277 | vcpu->arch.host_cpu_context = this_cpu_ptr(kvm_host_cpu_state); |
5b3e5e5b CD |
278 | |
279 | /* | |
280 | * Check whether this vcpu requires the cache to be flushed on | |
281 | * this physical CPU. This is a consequence of doing dcache | |
282 | * operations by set/way on this vcpu. We do it here to be in | |
283 | * a non-preemptible section. | |
284 | */ | |
285 | if (cpumask_test_and_clear_cpu(cpu, &vcpu->arch.require_dcache_flush)) | |
286 | flush_cache_all(); /* We'd really want v7_flush_dcache_all() */ | |
1638a12d MZ |
287 | |
288 | kvm_arm_set_running_vcpu(vcpu); | |
749cf76c CD |
289 | } |
290 | ||
291 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
292 | { | |
e9b152cb CD |
293 | /* |
294 | * The arch-generic KVM code expects the cpu field of a vcpu to be -1 | |
295 | * if the vcpu is no longer assigned to a cpu. This is used for the | |
296 | * optimized make_all_cpus_request path. | |
297 | */ | |
298 | vcpu->cpu = -1; | |
299 | ||
1638a12d | 300 | kvm_arm_set_running_vcpu(NULL); |
749cf76c CD |
301 | } |
302 | ||
303 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, | |
304 | struct kvm_guest_debug *dbg) | |
305 | { | |
306 | return -EINVAL; | |
307 | } | |
308 | ||
309 | ||
310 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, | |
311 | struct kvm_mp_state *mp_state) | |
312 | { | |
313 | return -EINVAL; | |
314 | } | |
315 | ||
316 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
317 | struct kvm_mp_state *mp_state) | |
318 | { | |
319 | return -EINVAL; | |
320 | } | |
321 | ||
5b3e5e5b CD |
322 | /** |
323 | * kvm_arch_vcpu_runnable - determine if the vcpu can be scheduled | |
324 | * @v: The VCPU pointer | |
325 | * | |
326 | * If the guest CPU is not waiting for interrupts or an interrupt line is | |
327 | * asserted, the CPU is by definition runnable. | |
328 | */ | |
749cf76c CD |
329 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) |
330 | { | |
1a89dd91 | 331 | return !!v->arch.irq_lines || kvm_vgic_vcpu_pending_irq(v); |
749cf76c CD |
332 | } |
333 | ||
f7ed45be CD |
334 | /* Just ensure a guest exit from a particular CPU */ |
335 | static void exit_vm_noop(void *info) | |
336 | { | |
337 | } | |
338 | ||
339 | void force_vm_exit(const cpumask_t *mask) | |
340 | { | |
341 | smp_call_function_many(mask, exit_vm_noop, NULL, true); | |
342 | } | |
343 | ||
344 | /** | |
345 | * need_new_vmid_gen - check that the VMID is still valid | |
346 | * @kvm: The VM's VMID to checkt | |
347 | * | |
348 | * return true if there is a new generation of VMIDs being used | |
349 | * | |
350 | * The hardware supports only 256 values with the value zero reserved for the | |
351 | * host, so we check if an assigned value belongs to a previous generation, | |
352 | * which which requires us to assign a new value. If we're the first to use a | |
353 | * VMID for the new generation, we must flush necessary caches and TLBs on all | |
354 | * CPUs. | |
355 | */ | |
356 | static bool need_new_vmid_gen(struct kvm *kvm) | |
357 | { | |
358 | return unlikely(kvm->arch.vmid_gen != atomic64_read(&kvm_vmid_gen)); | |
359 | } | |
360 | ||
361 | /** | |
362 | * update_vttbr - Update the VTTBR with a valid VMID before the guest runs | |
363 | * @kvm The guest that we are about to run | |
364 | * | |
365 | * Called from kvm_arch_vcpu_ioctl_run before entering the guest to ensure the | |
366 | * VM has a valid VMID, otherwise assigns a new one and flushes corresponding | |
367 | * caches and TLBs. | |
368 | */ | |
369 | static void update_vttbr(struct kvm *kvm) | |
370 | { | |
371 | phys_addr_t pgd_phys; | |
372 | u64 vmid; | |
373 | ||
374 | if (!need_new_vmid_gen(kvm)) | |
375 | return; | |
376 | ||
377 | spin_lock(&kvm_vmid_lock); | |
378 | ||
379 | /* | |
380 | * We need to re-check the vmid_gen here to ensure that if another vcpu | |
381 | * already allocated a valid vmid for this vm, then this vcpu should | |
382 | * use the same vmid. | |
383 | */ | |
384 | if (!need_new_vmid_gen(kvm)) { | |
385 | spin_unlock(&kvm_vmid_lock); | |
386 | return; | |
387 | } | |
388 | ||
389 | /* First user of a new VMID generation? */ | |
390 | if (unlikely(kvm_next_vmid == 0)) { | |
391 | atomic64_inc(&kvm_vmid_gen); | |
392 | kvm_next_vmid = 1; | |
393 | ||
394 | /* | |
395 | * On SMP we know no other CPUs can use this CPU's or each | |
396 | * other's VMID after force_vm_exit returns since the | |
397 | * kvm_vmid_lock blocks them from reentry to the guest. | |
398 | */ | |
399 | force_vm_exit(cpu_all_mask); | |
400 | /* | |
401 | * Now broadcast TLB + ICACHE invalidation over the inner | |
402 | * shareable domain to make sure all data structures are | |
403 | * clean. | |
404 | */ | |
405 | kvm_call_hyp(__kvm_flush_vm_context); | |
406 | } | |
407 | ||
408 | kvm->arch.vmid_gen = atomic64_read(&kvm_vmid_gen); | |
409 | kvm->arch.vmid = kvm_next_vmid; | |
410 | kvm_next_vmid++; | |
411 | ||
412 | /* update vttbr to be used with the new vmid */ | |
38f791a4 | 413 | pgd_phys = virt_to_phys(kvm_get_hwpgd(kvm)); |
dbff124e | 414 | BUG_ON(pgd_phys & ~VTTBR_BADDR_MASK); |
f7ed45be | 415 | vmid = ((u64)(kvm->arch.vmid) << VTTBR_VMID_SHIFT) & VTTBR_VMID_MASK; |
dbff124e | 416 | kvm->arch.vttbr = pgd_phys | vmid; |
f7ed45be CD |
417 | |
418 | spin_unlock(&kvm_vmid_lock); | |
419 | } | |
420 | ||
f7ed45be CD |
421 | static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu) |
422 | { | |
e1ba0207 CD |
423 | int ret; |
424 | ||
f7ed45be CD |
425 | if (likely(vcpu->arch.has_run_once)) |
426 | return 0; | |
427 | ||
428 | vcpu->arch.has_run_once = true; | |
aa024c2f | 429 | |
01ac5e34 MZ |
430 | /* |
431 | * Initialize the VGIC before running a vcpu the first time on | |
432 | * this VM. | |
433 | */ | |
e1ba0207 CD |
434 | if (unlikely(!vgic_initialized(vcpu->kvm))) { |
435 | ret = kvm_vgic_init(vcpu->kvm); | |
01ac5e34 MZ |
436 | if (ret) |
437 | return ret; | |
438 | } | |
439 | ||
f7ed45be CD |
440 | return 0; |
441 | } | |
442 | ||
aa024c2f MZ |
443 | static void vcpu_pause(struct kvm_vcpu *vcpu) |
444 | { | |
445 | wait_queue_head_t *wq = kvm_arch_vcpu_wq(vcpu); | |
446 | ||
447 | wait_event_interruptible(*wq, !vcpu->arch.pause); | |
448 | } | |
449 | ||
e8180dca AP |
450 | static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu) |
451 | { | |
452 | return vcpu->arch.target >= 0; | |
453 | } | |
454 | ||
f7ed45be CD |
455 | /** |
456 | * kvm_arch_vcpu_ioctl_run - the main VCPU run function to execute guest code | |
457 | * @vcpu: The VCPU pointer | |
458 | * @run: The kvm_run structure pointer used for userspace state exchange | |
459 | * | |
460 | * This function is called through the VCPU_RUN ioctl called from user space. It | |
461 | * will execute VM code in a loop until the time slice for the process is used | |
462 | * or some emulation is needed from user space in which case the function will | |
463 | * return with return value 0 and with the kvm_run structure filled in with the | |
464 | * required data for the requested emulation. | |
465 | */ | |
749cf76c CD |
466 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) |
467 | { | |
f7ed45be CD |
468 | int ret; |
469 | sigset_t sigsaved; | |
470 | ||
e8180dca | 471 | if (unlikely(!kvm_vcpu_initialized(vcpu))) |
f7ed45be CD |
472 | return -ENOEXEC; |
473 | ||
474 | ret = kvm_vcpu_first_run_init(vcpu); | |
475 | if (ret) | |
476 | return ret; | |
477 | ||
45e96ea6 CD |
478 | if (run->exit_reason == KVM_EXIT_MMIO) { |
479 | ret = kvm_handle_mmio_return(vcpu, vcpu->run); | |
480 | if (ret) | |
481 | return ret; | |
482 | } | |
483 | ||
f7ed45be CD |
484 | if (vcpu->sigset_active) |
485 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
486 | ||
487 | ret = 1; | |
488 | run->exit_reason = KVM_EXIT_UNKNOWN; | |
489 | while (ret > 0) { | |
490 | /* | |
491 | * Check conditions before entering the guest | |
492 | */ | |
493 | cond_resched(); | |
494 | ||
495 | update_vttbr(vcpu->kvm); | |
496 | ||
aa024c2f MZ |
497 | if (vcpu->arch.pause) |
498 | vcpu_pause(vcpu); | |
499 | ||
1a89dd91 | 500 | kvm_vgic_flush_hwstate(vcpu); |
c7e3ba64 | 501 | kvm_timer_flush_hwstate(vcpu); |
1a89dd91 | 502 | |
f7ed45be CD |
503 | local_irq_disable(); |
504 | ||
505 | /* | |
506 | * Re-check atomic conditions | |
507 | */ | |
508 | if (signal_pending(current)) { | |
509 | ret = -EINTR; | |
510 | run->exit_reason = KVM_EXIT_INTR; | |
511 | } | |
512 | ||
513 | if (ret <= 0 || need_new_vmid_gen(vcpu->kvm)) { | |
514 | local_irq_enable(); | |
c7e3ba64 | 515 | kvm_timer_sync_hwstate(vcpu); |
1a89dd91 | 516 | kvm_vgic_sync_hwstate(vcpu); |
f7ed45be CD |
517 | continue; |
518 | } | |
519 | ||
520 | /************************************************************** | |
521 | * Enter the guest | |
522 | */ | |
523 | trace_kvm_entry(*vcpu_pc(vcpu)); | |
524 | kvm_guest_enter(); | |
525 | vcpu->mode = IN_GUEST_MODE; | |
526 | ||
527 | ret = kvm_call_hyp(__kvm_vcpu_run, vcpu); | |
528 | ||
529 | vcpu->mode = OUTSIDE_GUEST_MODE; | |
5b3e5e5b | 530 | vcpu->arch.last_pcpu = smp_processor_id(); |
f7ed45be CD |
531 | kvm_guest_exit(); |
532 | trace_kvm_exit(*vcpu_pc(vcpu)); | |
533 | /* | |
534 | * We may have taken a host interrupt in HYP mode (ie | |
535 | * while executing the guest). This interrupt is still | |
536 | * pending, as we haven't serviced it yet! | |
537 | * | |
538 | * We're now back in SVC mode, with interrupts | |
539 | * disabled. Enabling the interrupts now will have | |
540 | * the effect of taking the interrupt again, in SVC | |
541 | * mode this time. | |
542 | */ | |
543 | local_irq_enable(); | |
544 | ||
545 | /* | |
546 | * Back from guest | |
547 | *************************************************************/ | |
548 | ||
c7e3ba64 | 549 | kvm_timer_sync_hwstate(vcpu); |
1a89dd91 MZ |
550 | kvm_vgic_sync_hwstate(vcpu); |
551 | ||
f7ed45be CD |
552 | ret = handle_exit(vcpu, run, ret); |
553 | } | |
554 | ||
555 | if (vcpu->sigset_active) | |
556 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
557 | return ret; | |
749cf76c CD |
558 | } |
559 | ||
86ce8535 CD |
560 | static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level) |
561 | { | |
562 | int bit_index; | |
563 | bool set; | |
564 | unsigned long *ptr; | |
565 | ||
566 | if (number == KVM_ARM_IRQ_CPU_IRQ) | |
567 | bit_index = __ffs(HCR_VI); | |
568 | else /* KVM_ARM_IRQ_CPU_FIQ */ | |
569 | bit_index = __ffs(HCR_VF); | |
570 | ||
571 | ptr = (unsigned long *)&vcpu->arch.irq_lines; | |
572 | if (level) | |
573 | set = test_and_set_bit(bit_index, ptr); | |
574 | else | |
575 | set = test_and_clear_bit(bit_index, ptr); | |
576 | ||
577 | /* | |
578 | * If we didn't change anything, no need to wake up or kick other CPUs | |
579 | */ | |
580 | if (set == level) | |
581 | return 0; | |
582 | ||
583 | /* | |
584 | * The vcpu irq_lines field was updated, wake up sleeping VCPUs and | |
585 | * trigger a world-switch round on the running physical CPU to set the | |
586 | * virtual IRQ/FIQ fields in the HCR appropriately. | |
587 | */ | |
588 | kvm_vcpu_kick(vcpu); | |
589 | ||
590 | return 0; | |
591 | } | |
592 | ||
79558f11 AG |
593 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, |
594 | bool line_status) | |
86ce8535 CD |
595 | { |
596 | u32 irq = irq_level->irq; | |
597 | unsigned int irq_type, vcpu_idx, irq_num; | |
598 | int nrcpus = atomic_read(&kvm->online_vcpus); | |
599 | struct kvm_vcpu *vcpu = NULL; | |
600 | bool level = irq_level->level; | |
601 | ||
602 | irq_type = (irq >> KVM_ARM_IRQ_TYPE_SHIFT) & KVM_ARM_IRQ_TYPE_MASK; | |
603 | vcpu_idx = (irq >> KVM_ARM_IRQ_VCPU_SHIFT) & KVM_ARM_IRQ_VCPU_MASK; | |
604 | irq_num = (irq >> KVM_ARM_IRQ_NUM_SHIFT) & KVM_ARM_IRQ_NUM_MASK; | |
605 | ||
606 | trace_kvm_irq_line(irq_type, vcpu_idx, irq_num, irq_level->level); | |
607 | ||
5863c2ce MZ |
608 | switch (irq_type) { |
609 | case KVM_ARM_IRQ_TYPE_CPU: | |
610 | if (irqchip_in_kernel(kvm)) | |
611 | return -ENXIO; | |
86ce8535 | 612 | |
5863c2ce MZ |
613 | if (vcpu_idx >= nrcpus) |
614 | return -EINVAL; | |
86ce8535 | 615 | |
5863c2ce MZ |
616 | vcpu = kvm_get_vcpu(kvm, vcpu_idx); |
617 | if (!vcpu) | |
618 | return -EINVAL; | |
86ce8535 | 619 | |
5863c2ce MZ |
620 | if (irq_num > KVM_ARM_IRQ_CPU_FIQ) |
621 | return -EINVAL; | |
622 | ||
623 | return vcpu_interrupt_line(vcpu, irq_num, level); | |
624 | case KVM_ARM_IRQ_TYPE_PPI: | |
625 | if (!irqchip_in_kernel(kvm)) | |
626 | return -ENXIO; | |
627 | ||
628 | if (vcpu_idx >= nrcpus) | |
629 | return -EINVAL; | |
630 | ||
631 | vcpu = kvm_get_vcpu(kvm, vcpu_idx); | |
632 | if (!vcpu) | |
633 | return -EINVAL; | |
634 | ||
635 | if (irq_num < VGIC_NR_SGIS || irq_num >= VGIC_NR_PRIVATE_IRQS) | |
636 | return -EINVAL; | |
86ce8535 | 637 | |
5863c2ce MZ |
638 | return kvm_vgic_inject_irq(kvm, vcpu->vcpu_id, irq_num, level); |
639 | case KVM_ARM_IRQ_TYPE_SPI: | |
640 | if (!irqchip_in_kernel(kvm)) | |
641 | return -ENXIO; | |
642 | ||
643 | if (irq_num < VGIC_NR_PRIVATE_IRQS || | |
644 | irq_num > KVM_ARM_IRQ_GIC_MAX) | |
645 | return -EINVAL; | |
646 | ||
647 | return kvm_vgic_inject_irq(kvm, 0, irq_num, level); | |
648 | } | |
649 | ||
650 | return -EINVAL; | |
86ce8535 CD |
651 | } |
652 | ||
f7fa034d CD |
653 | static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, |
654 | const struct kvm_vcpu_init *init) | |
655 | { | |
656 | unsigned int i; | |
657 | int phys_target = kvm_target_cpu(); | |
658 | ||
659 | if (init->target != phys_target) | |
660 | return -EINVAL; | |
661 | ||
662 | /* | |
663 | * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must | |
664 | * use the same target. | |
665 | */ | |
666 | if (vcpu->arch.target != -1 && vcpu->arch.target != init->target) | |
667 | return -EINVAL; | |
668 | ||
669 | /* -ENOENT for unknown features, -EINVAL for invalid combinations. */ | |
670 | for (i = 0; i < sizeof(init->features) * 8; i++) { | |
671 | bool set = (init->features[i / 32] & (1 << (i % 32))); | |
672 | ||
673 | if (set && i >= KVM_VCPU_MAX_FEATURES) | |
674 | return -ENOENT; | |
675 | ||
676 | /* | |
677 | * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must | |
678 | * use the same feature set. | |
679 | */ | |
680 | if (vcpu->arch.target != -1 && i < KVM_VCPU_MAX_FEATURES && | |
681 | test_bit(i, vcpu->arch.features) != set) | |
682 | return -EINVAL; | |
683 | ||
684 | if (set) | |
685 | set_bit(i, vcpu->arch.features); | |
686 | } | |
687 | ||
688 | vcpu->arch.target = phys_target; | |
689 | ||
690 | /* Now we know what it is, we can reset it. */ | |
691 | return kvm_reset_vcpu(vcpu); | |
692 | } | |
693 | ||
694 | ||
478a8237 CD |
695 | static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu, |
696 | struct kvm_vcpu_init *init) | |
697 | { | |
698 | int ret; | |
699 | ||
700 | ret = kvm_vcpu_set_target(vcpu, init); | |
701 | if (ret) | |
702 | return ret; | |
703 | ||
957db105 CD |
704 | /* |
705 | * Ensure a rebooted VM will fault in RAM pages and detect if the | |
706 | * guest MMU is turned off and flush the caches as needed. | |
707 | */ | |
708 | if (vcpu->arch.has_run_once) | |
709 | stage2_unmap_vm(vcpu->kvm); | |
710 | ||
b856a591 CD |
711 | vcpu_reset_hcr(vcpu); |
712 | ||
478a8237 CD |
713 | /* |
714 | * Handle the "start in power-off" case by marking the VCPU as paused. | |
715 | */ | |
03f1d4c1 | 716 | if (test_bit(KVM_ARM_VCPU_POWER_OFF, vcpu->arch.features)) |
478a8237 | 717 | vcpu->arch.pause = true; |
3ad8b3de CD |
718 | else |
719 | vcpu->arch.pause = false; | |
478a8237 CD |
720 | |
721 | return 0; | |
722 | } | |
723 | ||
749cf76c CD |
724 | long kvm_arch_vcpu_ioctl(struct file *filp, |
725 | unsigned int ioctl, unsigned long arg) | |
726 | { | |
727 | struct kvm_vcpu *vcpu = filp->private_data; | |
728 | void __user *argp = (void __user *)arg; | |
729 | ||
730 | switch (ioctl) { | |
731 | case KVM_ARM_VCPU_INIT: { | |
732 | struct kvm_vcpu_init init; | |
733 | ||
734 | if (copy_from_user(&init, argp, sizeof(init))) | |
735 | return -EFAULT; | |
736 | ||
478a8237 | 737 | return kvm_arch_vcpu_ioctl_vcpu_init(vcpu, &init); |
749cf76c CD |
738 | } |
739 | case KVM_SET_ONE_REG: | |
740 | case KVM_GET_ONE_REG: { | |
741 | struct kvm_one_reg reg; | |
e8180dca AP |
742 | |
743 | if (unlikely(!kvm_vcpu_initialized(vcpu))) | |
744 | return -ENOEXEC; | |
745 | ||
749cf76c CD |
746 | if (copy_from_user(®, argp, sizeof(reg))) |
747 | return -EFAULT; | |
748 | if (ioctl == KVM_SET_ONE_REG) | |
749 | return kvm_arm_set_reg(vcpu, ®); | |
750 | else | |
751 | return kvm_arm_get_reg(vcpu, ®); | |
752 | } | |
753 | case KVM_GET_REG_LIST: { | |
754 | struct kvm_reg_list __user *user_list = argp; | |
755 | struct kvm_reg_list reg_list; | |
756 | unsigned n; | |
757 | ||
e8180dca AP |
758 | if (unlikely(!kvm_vcpu_initialized(vcpu))) |
759 | return -ENOEXEC; | |
760 | ||
749cf76c CD |
761 | if (copy_from_user(®_list, user_list, sizeof(reg_list))) |
762 | return -EFAULT; | |
763 | n = reg_list.n; | |
764 | reg_list.n = kvm_arm_num_regs(vcpu); | |
765 | if (copy_to_user(user_list, ®_list, sizeof(reg_list))) | |
766 | return -EFAULT; | |
767 | if (n < reg_list.n) | |
768 | return -E2BIG; | |
769 | return kvm_arm_copy_reg_indices(vcpu, user_list->reg); | |
770 | } | |
771 | default: | |
772 | return -EINVAL; | |
773 | } | |
774 | } | |
775 | ||
776 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) | |
777 | { | |
778 | return -EINVAL; | |
779 | } | |
780 | ||
3401d546 CD |
781 | static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm, |
782 | struct kvm_arm_device_addr *dev_addr) | |
783 | { | |
330690cd CD |
784 | unsigned long dev_id, type; |
785 | ||
786 | dev_id = (dev_addr->id & KVM_ARM_DEVICE_ID_MASK) >> | |
787 | KVM_ARM_DEVICE_ID_SHIFT; | |
788 | type = (dev_addr->id & KVM_ARM_DEVICE_TYPE_MASK) >> | |
789 | KVM_ARM_DEVICE_TYPE_SHIFT; | |
790 | ||
791 | switch (dev_id) { | |
792 | case KVM_ARM_DEVICE_VGIC_V2: | |
793 | if (!vgic_present) | |
794 | return -ENXIO; | |
ce01e4e8 | 795 | return kvm_vgic_addr(kvm, type, &dev_addr->addr, true); |
330690cd CD |
796 | default: |
797 | return -ENODEV; | |
798 | } | |
3401d546 CD |
799 | } |
800 | ||
749cf76c CD |
801 | long kvm_arch_vm_ioctl(struct file *filp, |
802 | unsigned int ioctl, unsigned long arg) | |
803 | { | |
3401d546 CD |
804 | struct kvm *kvm = filp->private_data; |
805 | void __user *argp = (void __user *)arg; | |
806 | ||
807 | switch (ioctl) { | |
5863c2ce MZ |
808 | case KVM_CREATE_IRQCHIP: { |
809 | if (vgic_present) | |
810 | return kvm_vgic_create(kvm); | |
811 | else | |
812 | return -ENXIO; | |
813 | } | |
3401d546 CD |
814 | case KVM_ARM_SET_DEVICE_ADDR: { |
815 | struct kvm_arm_device_addr dev_addr; | |
816 | ||
817 | if (copy_from_user(&dev_addr, argp, sizeof(dev_addr))) | |
818 | return -EFAULT; | |
819 | return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr); | |
820 | } | |
42c4e0c7 AP |
821 | case KVM_ARM_PREFERRED_TARGET: { |
822 | int err; | |
823 | struct kvm_vcpu_init init; | |
824 | ||
825 | err = kvm_vcpu_preferred_target(&init); | |
826 | if (err) | |
827 | return err; | |
828 | ||
829 | if (copy_to_user(argp, &init, sizeof(init))) | |
830 | return -EFAULT; | |
831 | ||
832 | return 0; | |
833 | } | |
3401d546 CD |
834 | default: |
835 | return -EINVAL; | |
836 | } | |
749cf76c CD |
837 | } |
838 | ||
d157f4a5 | 839 | static void cpu_init_hyp_mode(void *dummy) |
342cd0ab | 840 | { |
dac288f7 MZ |
841 | phys_addr_t boot_pgd_ptr; |
842 | phys_addr_t pgd_ptr; | |
342cd0ab CD |
843 | unsigned long hyp_stack_ptr; |
844 | unsigned long stack_page; | |
845 | unsigned long vector_ptr; | |
846 | ||
847 | /* Switch from the HYP stub to our own HYP init vector */ | |
5a677ce0 | 848 | __hyp_set_vectors(kvm_get_idmap_vector()); |
342cd0ab | 849 | |
dac288f7 MZ |
850 | boot_pgd_ptr = kvm_mmu_get_boot_httbr(); |
851 | pgd_ptr = kvm_mmu_get_httbr(); | |
1436c1aa | 852 | stack_page = __this_cpu_read(kvm_arm_hyp_stack_page); |
342cd0ab CD |
853 | hyp_stack_ptr = stack_page + PAGE_SIZE; |
854 | vector_ptr = (unsigned long)__kvm_hyp_vector; | |
855 | ||
5a677ce0 | 856 | __cpu_init_hyp_mode(boot_pgd_ptr, pgd_ptr, hyp_stack_ptr, vector_ptr); |
342cd0ab CD |
857 | } |
858 | ||
d157f4a5 MZ |
859 | static int hyp_init_cpu_notify(struct notifier_block *self, |
860 | unsigned long action, void *cpu) | |
861 | { | |
862 | switch (action) { | |
863 | case CPU_STARTING: | |
864 | case CPU_STARTING_FROZEN: | |
37a34ac1 VM |
865 | if (__hyp_get_vectors() == hyp_default_vectors) |
866 | cpu_init_hyp_mode(NULL); | |
d157f4a5 MZ |
867 | break; |
868 | } | |
869 | ||
870 | return NOTIFY_OK; | |
342cd0ab CD |
871 | } |
872 | ||
d157f4a5 MZ |
873 | static struct notifier_block hyp_init_cpu_nb = { |
874 | .notifier_call = hyp_init_cpu_notify, | |
875 | }; | |
876 | ||
1fcf7ce0 LP |
877 | #ifdef CONFIG_CPU_PM |
878 | static int hyp_init_cpu_pm_notifier(struct notifier_block *self, | |
879 | unsigned long cmd, | |
880 | void *v) | |
881 | { | |
b20c9f29 MZ |
882 | if (cmd == CPU_PM_EXIT && |
883 | __hyp_get_vectors() == hyp_default_vectors) { | |
1fcf7ce0 LP |
884 | cpu_init_hyp_mode(NULL); |
885 | return NOTIFY_OK; | |
886 | } | |
887 | ||
888 | return NOTIFY_DONE; | |
889 | } | |
890 | ||
891 | static struct notifier_block hyp_init_cpu_pm_nb = { | |
892 | .notifier_call = hyp_init_cpu_pm_notifier, | |
893 | }; | |
894 | ||
895 | static void __init hyp_cpu_pm_init(void) | |
896 | { | |
897 | cpu_pm_register_notifier(&hyp_init_cpu_pm_nb); | |
898 | } | |
899 | #else | |
900 | static inline void hyp_cpu_pm_init(void) | |
901 | { | |
902 | } | |
903 | #endif | |
904 | ||
342cd0ab CD |
905 | /** |
906 | * Inits Hyp-mode on all online CPUs | |
907 | */ | |
908 | static int init_hyp_mode(void) | |
909 | { | |
342cd0ab CD |
910 | int cpu; |
911 | int err = 0; | |
912 | ||
913 | /* | |
914 | * Allocate Hyp PGD and setup Hyp identity mapping | |
915 | */ | |
916 | err = kvm_mmu_init(); | |
917 | if (err) | |
918 | goto out_err; | |
919 | ||
920 | /* | |
921 | * It is probably enough to obtain the default on one | |
922 | * CPU. It's unlikely to be different on the others. | |
923 | */ | |
924 | hyp_default_vectors = __hyp_get_vectors(); | |
925 | ||
926 | /* | |
927 | * Allocate stack pages for Hypervisor-mode | |
928 | */ | |
929 | for_each_possible_cpu(cpu) { | |
930 | unsigned long stack_page; | |
931 | ||
932 | stack_page = __get_free_page(GFP_KERNEL); | |
933 | if (!stack_page) { | |
934 | err = -ENOMEM; | |
935 | goto out_free_stack_pages; | |
936 | } | |
937 | ||
938 | per_cpu(kvm_arm_hyp_stack_page, cpu) = stack_page; | |
939 | } | |
940 | ||
342cd0ab CD |
941 | /* |
942 | * Map the Hyp-code called directly from the host | |
943 | */ | |
944 | err = create_hyp_mappings(__kvm_hyp_code_start, __kvm_hyp_code_end); | |
945 | if (err) { | |
946 | kvm_err("Cannot map world-switch code\n"); | |
947 | goto out_free_mappings; | |
948 | } | |
949 | ||
950 | /* | |
951 | * Map the Hyp stack pages | |
952 | */ | |
953 | for_each_possible_cpu(cpu) { | |
954 | char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu); | |
955 | err = create_hyp_mappings(stack_page, stack_page + PAGE_SIZE); | |
956 | ||
957 | if (err) { | |
958 | kvm_err("Cannot map hyp stack\n"); | |
959 | goto out_free_mappings; | |
960 | } | |
961 | } | |
962 | ||
963 | /* | |
3de50da6 | 964 | * Map the host CPU structures |
342cd0ab | 965 | */ |
3de50da6 MZ |
966 | kvm_host_cpu_state = alloc_percpu(kvm_cpu_context_t); |
967 | if (!kvm_host_cpu_state) { | |
342cd0ab | 968 | err = -ENOMEM; |
3de50da6 | 969 | kvm_err("Cannot allocate host CPU state\n"); |
342cd0ab CD |
970 | goto out_free_mappings; |
971 | } | |
972 | ||
973 | for_each_possible_cpu(cpu) { | |
3de50da6 | 974 | kvm_cpu_context_t *cpu_ctxt; |
342cd0ab | 975 | |
3de50da6 MZ |
976 | cpu_ctxt = per_cpu_ptr(kvm_host_cpu_state, cpu); |
977 | err = create_hyp_mappings(cpu_ctxt, cpu_ctxt + 1); | |
342cd0ab CD |
978 | |
979 | if (err) { | |
3de50da6 MZ |
980 | kvm_err("Cannot map host CPU state: %d\n", err); |
981 | goto out_free_context; | |
342cd0ab CD |
982 | } |
983 | } | |
984 | ||
d157f4a5 MZ |
985 | /* |
986 | * Execute the init code on each CPU. | |
987 | */ | |
988 | on_each_cpu(cpu_init_hyp_mode, NULL, 1); | |
989 | ||
1a89dd91 MZ |
990 | /* |
991 | * Init HYP view of VGIC | |
992 | */ | |
993 | err = kvm_vgic_hyp_init(); | |
994 | if (err) | |
3de50da6 | 995 | goto out_free_context; |
1a89dd91 | 996 | |
01ac5e34 MZ |
997 | #ifdef CONFIG_KVM_ARM_VGIC |
998 | vgic_present = true; | |
999 | #endif | |
1000 | ||
967f8427 MZ |
1001 | /* |
1002 | * Init HYP architected timer support | |
1003 | */ | |
1004 | err = kvm_timer_hyp_init(); | |
1005 | if (err) | |
1006 | goto out_free_mappings; | |
1007 | ||
d157f4a5 MZ |
1008 | #ifndef CONFIG_HOTPLUG_CPU |
1009 | free_boot_hyp_pgd(); | |
1010 | #endif | |
1011 | ||
210552c1 MZ |
1012 | kvm_perf_init(); |
1013 | ||
342cd0ab | 1014 | kvm_info("Hyp mode initialized successfully\n"); |
210552c1 | 1015 | |
342cd0ab | 1016 | return 0; |
3de50da6 MZ |
1017 | out_free_context: |
1018 | free_percpu(kvm_host_cpu_state); | |
342cd0ab | 1019 | out_free_mappings: |
4f728276 | 1020 | free_hyp_pgds(); |
342cd0ab CD |
1021 | out_free_stack_pages: |
1022 | for_each_possible_cpu(cpu) | |
1023 | free_page(per_cpu(kvm_arm_hyp_stack_page, cpu)); | |
1024 | out_err: | |
1025 | kvm_err("error initializing Hyp mode: %d\n", err); | |
1026 | return err; | |
1027 | } | |
1028 | ||
d4e071ce AP |
1029 | static void check_kvm_target_cpu(void *ret) |
1030 | { | |
1031 | *(int *)ret = kvm_target_cpu(); | |
1032 | } | |
1033 | ||
342cd0ab CD |
1034 | /** |
1035 | * Initialize Hyp-mode and memory mappings on all CPUs. | |
1036 | */ | |
749cf76c CD |
1037 | int kvm_arch_init(void *opaque) |
1038 | { | |
342cd0ab | 1039 | int err; |
d4e071ce | 1040 | int ret, cpu; |
342cd0ab CD |
1041 | |
1042 | if (!is_hyp_mode_available()) { | |
1043 | kvm_err("HYP mode not available\n"); | |
1044 | return -ENODEV; | |
1045 | } | |
1046 | ||
d4e071ce AP |
1047 | for_each_online_cpu(cpu) { |
1048 | smp_call_function_single(cpu, check_kvm_target_cpu, &ret, 1); | |
1049 | if (ret < 0) { | |
1050 | kvm_err("Error, CPU %d not supported!\n", cpu); | |
1051 | return -ENODEV; | |
1052 | } | |
342cd0ab CD |
1053 | } |
1054 | ||
8146875d SB |
1055 | cpu_notifier_register_begin(); |
1056 | ||
342cd0ab CD |
1057 | err = init_hyp_mode(); |
1058 | if (err) | |
1059 | goto out_err; | |
1060 | ||
8146875d | 1061 | err = __register_cpu_notifier(&hyp_init_cpu_nb); |
d157f4a5 MZ |
1062 | if (err) { |
1063 | kvm_err("Cannot register HYP init CPU notifier (%d)\n", err); | |
1064 | goto out_err; | |
1065 | } | |
1066 | ||
8146875d SB |
1067 | cpu_notifier_register_done(); |
1068 | ||
1fcf7ce0 LP |
1069 | hyp_cpu_pm_init(); |
1070 | ||
5b3e5e5b | 1071 | kvm_coproc_table_init(); |
749cf76c | 1072 | return 0; |
342cd0ab | 1073 | out_err: |
8146875d | 1074 | cpu_notifier_register_done(); |
342cd0ab | 1075 | return err; |
749cf76c CD |
1076 | } |
1077 | ||
1078 | /* NOP: Compiling as a module not supported */ | |
1079 | void kvm_arch_exit(void) | |
1080 | { | |
210552c1 | 1081 | kvm_perf_teardown(); |
749cf76c CD |
1082 | } |
1083 | ||
1084 | static int arm_init(void) | |
1085 | { | |
1086 | int rc = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); | |
1087 | return rc; | |
1088 | } | |
1089 | ||
1090 | module_init(arm_init); |