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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 | |
1638a12d MZ |
64 | static void kvm_arm_set_running_vcpu(struct kvm_vcpu *vcpu) |
65 | { | |
66 | BUG_ON(preemptible()); | |
1436c1aa | 67 | __this_cpu_write(kvm_arm_running_vcpu, vcpu); |
1638a12d MZ |
68 | } |
69 | ||
70 | /** | |
71 | * kvm_arm_get_running_vcpu - get the vcpu running on the current CPU. | |
72 | * Must be called from non-preemptible context | |
73 | */ | |
74 | struct kvm_vcpu *kvm_arm_get_running_vcpu(void) | |
75 | { | |
76 | BUG_ON(preemptible()); | |
1436c1aa | 77 | return __this_cpu_read(kvm_arm_running_vcpu); |
1638a12d MZ |
78 | } |
79 | ||
80 | /** | |
81 | * kvm_arm_get_running_vcpus - get the per-CPU array of currently running vcpus. | |
82 | */ | |
4000be42 | 83 | struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void) |
1638a12d MZ |
84 | { |
85 | return &kvm_arm_running_vcpu; | |
86 | } | |
87 | ||
13a34e06 | 88 | int kvm_arch_hardware_enable(void) |
749cf76c CD |
89 | { |
90 | return 0; | |
91 | } | |
92 | ||
93 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) | |
94 | { | |
95 | return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; | |
96 | } | |
97 | ||
749cf76c CD |
98 | int kvm_arch_hardware_setup(void) |
99 | { | |
100 | return 0; | |
101 | } | |
102 | ||
749cf76c CD |
103 | void kvm_arch_check_processor_compat(void *rtn) |
104 | { | |
105 | *(int *)rtn = 0; | |
106 | } | |
107 | ||
749cf76c | 108 | |
d5d8184d CD |
109 | /** |
110 | * kvm_arch_init_vm - initializes a VM data structure | |
111 | * @kvm: pointer to the KVM struct | |
112 | */ | |
749cf76c CD |
113 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
114 | { | |
d5d8184d CD |
115 | int ret = 0; |
116 | ||
749cf76c CD |
117 | if (type) |
118 | return -EINVAL; | |
119 | ||
d5d8184d CD |
120 | ret = kvm_alloc_stage2_pgd(kvm); |
121 | if (ret) | |
122 | goto out_fail_alloc; | |
123 | ||
124 | ret = create_hyp_mappings(kvm, kvm + 1); | |
125 | if (ret) | |
126 | goto out_free_stage2_pgd; | |
127 | ||
a1a64387 CD |
128 | kvm_timer_init(kvm); |
129 | ||
d5d8184d CD |
130 | /* Mark the initial VMID generation invalid */ |
131 | kvm->arch.vmid_gen = 0; | |
132 | ||
3caa2d8c AP |
133 | /* The maximum number of VCPUs is limited by the host's GIC model */ |
134 | kvm->arch.max_vcpus = kvm_vgic_get_max_vcpus(); | |
135 | ||
d5d8184d CD |
136 | return ret; |
137 | out_free_stage2_pgd: | |
138 | kvm_free_stage2_pgd(kvm); | |
139 | out_fail_alloc: | |
140 | return ret; | |
749cf76c CD |
141 | } |
142 | ||
143 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) | |
144 | { | |
145 | return VM_FAULT_SIGBUS; | |
146 | } | |
147 | ||
749cf76c | 148 | |
d5d8184d CD |
149 | /** |
150 | * kvm_arch_destroy_vm - destroy the VM data structure | |
151 | * @kvm: pointer to the KVM struct | |
152 | */ | |
749cf76c CD |
153 | void kvm_arch_destroy_vm(struct kvm *kvm) |
154 | { | |
155 | int i; | |
156 | ||
d5d8184d CD |
157 | kvm_free_stage2_pgd(kvm); |
158 | ||
749cf76c CD |
159 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
160 | if (kvm->vcpus[i]) { | |
161 | kvm_arch_vcpu_free(kvm->vcpus[i]); | |
162 | kvm->vcpus[i] = NULL; | |
163 | } | |
164 | } | |
c1bfb577 MZ |
165 | |
166 | kvm_vgic_destroy(kvm); | |
749cf76c CD |
167 | } |
168 | ||
784aa3d7 | 169 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
749cf76c CD |
170 | { |
171 | int r; | |
172 | switch (ext) { | |
1a89dd91 | 173 | case KVM_CAP_IRQCHIP: |
d44758c0 | 174 | case KVM_CAP_IOEVENTFD: |
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: |
ecccf0cc | 183 | case KVM_CAP_MP_STATE: |
749cf76c CD |
184 | r = 1; |
185 | break; | |
186 | case KVM_CAP_COALESCED_MMIO: | |
187 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
188 | break; | |
3401d546 CD |
189 | case KVM_CAP_ARM_SET_DEVICE_ADDR: |
190 | r = 1; | |
ca46e10f | 191 | break; |
749cf76c CD |
192 | case KVM_CAP_NR_VCPUS: |
193 | r = num_online_cpus(); | |
194 | break; | |
195 | case KVM_CAP_MAX_VCPUS: | |
196 | r = KVM_MAX_VCPUS; | |
197 | break; | |
198 | default: | |
17b1e31f | 199 | r = kvm_arch_dev_ioctl_check_extension(ext); |
749cf76c CD |
200 | break; |
201 | } | |
202 | return r; | |
203 | } | |
204 | ||
205 | long kvm_arch_dev_ioctl(struct file *filp, | |
206 | unsigned int ioctl, unsigned long arg) | |
207 | { | |
208 | return -EINVAL; | |
209 | } | |
210 | ||
749cf76c CD |
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 | ||
716139df CD |
217 | if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) { |
218 | err = -EBUSY; | |
219 | goto out; | |
220 | } | |
221 | ||
3caa2d8c AP |
222 | if (id >= kvm->arch.max_vcpus) { |
223 | err = -EINVAL; | |
224 | goto out; | |
225 | } | |
226 | ||
749cf76c CD |
227 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
228 | if (!vcpu) { | |
229 | err = -ENOMEM; | |
230 | goto out; | |
231 | } | |
232 | ||
233 | err = kvm_vcpu_init(vcpu, kvm, id); | |
234 | if (err) | |
235 | goto free_vcpu; | |
236 | ||
d5d8184d CD |
237 | err = create_hyp_mappings(vcpu, vcpu + 1); |
238 | if (err) | |
239 | goto vcpu_uninit; | |
240 | ||
749cf76c | 241 | return vcpu; |
d5d8184d CD |
242 | vcpu_uninit: |
243 | kvm_vcpu_uninit(vcpu); | |
749cf76c CD |
244 | free_vcpu: |
245 | kmem_cache_free(kvm_vcpu_cache, vcpu); | |
246 | out: | |
247 | return ERR_PTR(err); | |
248 | } | |
249 | ||
31928aa5 | 250 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
749cf76c | 251 | { |
749cf76c CD |
252 | } |
253 | ||
254 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
255 | { | |
d5d8184d | 256 | kvm_mmu_free_memory_caches(vcpu); |
967f8427 | 257 | kvm_timer_vcpu_terminate(vcpu); |
c1bfb577 | 258 | kvm_vgic_vcpu_destroy(vcpu); |
d5d8184d | 259 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
749cf76c CD |
260 | } |
261 | ||
262 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) | |
263 | { | |
264 | kvm_arch_vcpu_free(vcpu); | |
265 | } | |
266 | ||
267 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) | |
268 | { | |
1a748478 | 269 | return kvm_timer_should_fire(vcpu); |
749cf76c CD |
270 | } |
271 | ||
749cf76c CD |
272 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
273 | { | |
f7ed45be CD |
274 | /* Force users to call KVM_ARM_VCPU_INIT */ |
275 | vcpu->arch.target = -1; | |
f7fa034d | 276 | bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES); |
1a89dd91 | 277 | |
967f8427 MZ |
278 | /* Set up the timer */ |
279 | kvm_timer_vcpu_init(vcpu); | |
280 | ||
749cf76c CD |
281 | return 0; |
282 | } | |
283 | ||
749cf76c CD |
284 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
285 | { | |
86ce8535 | 286 | vcpu->cpu = cpu; |
3de50da6 | 287 | vcpu->arch.host_cpu_context = this_cpu_ptr(kvm_host_cpu_state); |
5b3e5e5b | 288 | |
1638a12d | 289 | kvm_arm_set_running_vcpu(vcpu); |
749cf76c CD |
290 | } |
291 | ||
292 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
293 | { | |
e9b152cb CD |
294 | /* |
295 | * The arch-generic KVM code expects the cpu field of a vcpu to be -1 | |
296 | * if the vcpu is no longer assigned to a cpu. This is used for the | |
297 | * optimized make_all_cpus_request path. | |
298 | */ | |
299 | vcpu->cpu = -1; | |
300 | ||
1638a12d | 301 | kvm_arm_set_running_vcpu(NULL); |
749cf76c CD |
302 | } |
303 | ||
749cf76c CD |
304 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
305 | struct kvm_mp_state *mp_state) | |
306 | { | |
ecccf0cc AB |
307 | if (vcpu->arch.pause) |
308 | mp_state->mp_state = KVM_MP_STATE_STOPPED; | |
309 | else | |
310 | mp_state->mp_state = KVM_MP_STATE_RUNNABLE; | |
311 | ||
312 | return 0; | |
749cf76c CD |
313 | } |
314 | ||
315 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
316 | struct kvm_mp_state *mp_state) | |
317 | { | |
ecccf0cc AB |
318 | switch (mp_state->mp_state) { |
319 | case KVM_MP_STATE_RUNNABLE: | |
320 | vcpu->arch.pause = false; | |
321 | break; | |
322 | case KVM_MP_STATE_STOPPED: | |
323 | vcpu->arch.pause = true; | |
324 | break; | |
325 | default: | |
326 | return -EINVAL; | |
327 | } | |
328 | ||
329 | return 0; | |
749cf76c CD |
330 | } |
331 | ||
5b3e5e5b CD |
332 | /** |
333 | * kvm_arch_vcpu_runnable - determine if the vcpu can be scheduled | |
334 | * @v: The VCPU pointer | |
335 | * | |
336 | * If the guest CPU is not waiting for interrupts or an interrupt line is | |
337 | * asserted, the CPU is by definition runnable. | |
338 | */ | |
749cf76c CD |
339 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) |
340 | { | |
1a89dd91 | 341 | return !!v->arch.irq_lines || kvm_vgic_vcpu_pending_irq(v); |
749cf76c CD |
342 | } |
343 | ||
f7ed45be CD |
344 | /* Just ensure a guest exit from a particular CPU */ |
345 | static void exit_vm_noop(void *info) | |
346 | { | |
347 | } | |
348 | ||
349 | void force_vm_exit(const cpumask_t *mask) | |
350 | { | |
351 | smp_call_function_many(mask, exit_vm_noop, NULL, true); | |
352 | } | |
353 | ||
354 | /** | |
355 | * need_new_vmid_gen - check that the VMID is still valid | |
356 | * @kvm: The VM's VMID to checkt | |
357 | * | |
358 | * return true if there is a new generation of VMIDs being used | |
359 | * | |
360 | * The hardware supports only 256 values with the value zero reserved for the | |
361 | * host, so we check if an assigned value belongs to a previous generation, | |
362 | * which which requires us to assign a new value. If we're the first to use a | |
363 | * VMID for the new generation, we must flush necessary caches and TLBs on all | |
364 | * CPUs. | |
365 | */ | |
366 | static bool need_new_vmid_gen(struct kvm *kvm) | |
367 | { | |
368 | return unlikely(kvm->arch.vmid_gen != atomic64_read(&kvm_vmid_gen)); | |
369 | } | |
370 | ||
371 | /** | |
372 | * update_vttbr - Update the VTTBR with a valid VMID before the guest runs | |
373 | * @kvm The guest that we are about to run | |
374 | * | |
375 | * Called from kvm_arch_vcpu_ioctl_run before entering the guest to ensure the | |
376 | * VM has a valid VMID, otherwise assigns a new one and flushes corresponding | |
377 | * caches and TLBs. | |
378 | */ | |
379 | static void update_vttbr(struct kvm *kvm) | |
380 | { | |
381 | phys_addr_t pgd_phys; | |
382 | u64 vmid; | |
383 | ||
384 | if (!need_new_vmid_gen(kvm)) | |
385 | return; | |
386 | ||
387 | spin_lock(&kvm_vmid_lock); | |
388 | ||
389 | /* | |
390 | * We need to re-check the vmid_gen here to ensure that if another vcpu | |
391 | * already allocated a valid vmid for this vm, then this vcpu should | |
392 | * use the same vmid. | |
393 | */ | |
394 | if (!need_new_vmid_gen(kvm)) { | |
395 | spin_unlock(&kvm_vmid_lock); | |
396 | return; | |
397 | } | |
398 | ||
399 | /* First user of a new VMID generation? */ | |
400 | if (unlikely(kvm_next_vmid == 0)) { | |
401 | atomic64_inc(&kvm_vmid_gen); | |
402 | kvm_next_vmid = 1; | |
403 | ||
404 | /* | |
405 | * On SMP we know no other CPUs can use this CPU's or each | |
406 | * other's VMID after force_vm_exit returns since the | |
407 | * kvm_vmid_lock blocks them from reentry to the guest. | |
408 | */ | |
409 | force_vm_exit(cpu_all_mask); | |
410 | /* | |
411 | * Now broadcast TLB + ICACHE invalidation over the inner | |
412 | * shareable domain to make sure all data structures are | |
413 | * clean. | |
414 | */ | |
415 | kvm_call_hyp(__kvm_flush_vm_context); | |
416 | } | |
417 | ||
418 | kvm->arch.vmid_gen = atomic64_read(&kvm_vmid_gen); | |
419 | kvm->arch.vmid = kvm_next_vmid; | |
420 | kvm_next_vmid++; | |
421 | ||
422 | /* update vttbr to be used with the new vmid */ | |
38f791a4 | 423 | pgd_phys = virt_to_phys(kvm_get_hwpgd(kvm)); |
dbff124e | 424 | BUG_ON(pgd_phys & ~VTTBR_BADDR_MASK); |
f7ed45be | 425 | vmid = ((u64)(kvm->arch.vmid) << VTTBR_VMID_SHIFT) & VTTBR_VMID_MASK; |
dbff124e | 426 | kvm->arch.vttbr = pgd_phys | vmid; |
f7ed45be CD |
427 | |
428 | spin_unlock(&kvm_vmid_lock); | |
429 | } | |
430 | ||
f7ed45be CD |
431 | static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu) |
432 | { | |
05971120 | 433 | struct kvm *kvm = vcpu->kvm; |
e1ba0207 CD |
434 | int ret; |
435 | ||
f7ed45be CD |
436 | if (likely(vcpu->arch.has_run_once)) |
437 | return 0; | |
438 | ||
439 | vcpu->arch.has_run_once = true; | |
aa024c2f | 440 | |
01ac5e34 | 441 | /* |
6d3cfbe2 PM |
442 | * Map the VGIC hardware resources before running a vcpu the first |
443 | * time on this VM. | |
01ac5e34 | 444 | */ |
05971120 CD |
445 | if (unlikely(!vgic_ready(kvm))) { |
446 | ret = kvm_vgic_map_resources(kvm); | |
01ac5e34 MZ |
447 | if (ret) |
448 | return ret; | |
449 | } | |
450 | ||
05971120 CD |
451 | /* |
452 | * Enable the arch timers only if we have an in-kernel VGIC | |
453 | * and it has been properly initialized, since we cannot handle | |
454 | * interrupts from the virtual timer with a userspace gic. | |
455 | */ | |
456 | if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) | |
457 | kvm_timer_enable(kvm); | |
458 | ||
f7ed45be CD |
459 | return 0; |
460 | } | |
461 | ||
c1426e4c EA |
462 | bool kvm_arch_intc_initialized(struct kvm *kvm) |
463 | { | |
464 | return vgic_initialized(kvm); | |
465 | } | |
466 | ||
aa024c2f MZ |
467 | static void vcpu_pause(struct kvm_vcpu *vcpu) |
468 | { | |
469 | wait_queue_head_t *wq = kvm_arch_vcpu_wq(vcpu); | |
470 | ||
471 | wait_event_interruptible(*wq, !vcpu->arch.pause); | |
472 | } | |
473 | ||
e8180dca AP |
474 | static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu) |
475 | { | |
476 | return vcpu->arch.target >= 0; | |
477 | } | |
478 | ||
f7ed45be CD |
479 | /** |
480 | * kvm_arch_vcpu_ioctl_run - the main VCPU run function to execute guest code | |
481 | * @vcpu: The VCPU pointer | |
482 | * @run: The kvm_run structure pointer used for userspace state exchange | |
483 | * | |
484 | * This function is called through the VCPU_RUN ioctl called from user space. It | |
485 | * will execute VM code in a loop until the time slice for the process is used | |
486 | * or some emulation is needed from user space in which case the function will | |
487 | * return with return value 0 and with the kvm_run structure filled in with the | |
488 | * required data for the requested emulation. | |
489 | */ | |
749cf76c CD |
490 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) |
491 | { | |
f7ed45be CD |
492 | int ret; |
493 | sigset_t sigsaved; | |
494 | ||
e8180dca | 495 | if (unlikely(!kvm_vcpu_initialized(vcpu))) |
f7ed45be CD |
496 | return -ENOEXEC; |
497 | ||
498 | ret = kvm_vcpu_first_run_init(vcpu); | |
499 | if (ret) | |
500 | return ret; | |
501 | ||
45e96ea6 CD |
502 | if (run->exit_reason == KVM_EXIT_MMIO) { |
503 | ret = kvm_handle_mmio_return(vcpu, vcpu->run); | |
504 | if (ret) | |
505 | return ret; | |
506 | } | |
507 | ||
f7ed45be CD |
508 | if (vcpu->sigset_active) |
509 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
510 | ||
511 | ret = 1; | |
512 | run->exit_reason = KVM_EXIT_UNKNOWN; | |
513 | while (ret > 0) { | |
514 | /* | |
515 | * Check conditions before entering the guest | |
516 | */ | |
517 | cond_resched(); | |
518 | ||
519 | update_vttbr(vcpu->kvm); | |
520 | ||
aa024c2f MZ |
521 | if (vcpu->arch.pause) |
522 | vcpu_pause(vcpu); | |
523 | ||
1a89dd91 | 524 | kvm_vgic_flush_hwstate(vcpu); |
c7e3ba64 | 525 | kvm_timer_flush_hwstate(vcpu); |
1a89dd91 | 526 | |
1b3d546d | 527 | preempt_disable(); |
f7ed45be CD |
528 | local_irq_disable(); |
529 | ||
530 | /* | |
531 | * Re-check atomic conditions | |
532 | */ | |
533 | if (signal_pending(current)) { | |
534 | ret = -EINTR; | |
535 | run->exit_reason = KVM_EXIT_INTR; | |
536 | } | |
537 | ||
538 | if (ret <= 0 || need_new_vmid_gen(vcpu->kvm)) { | |
539 | local_irq_enable(); | |
1b3d546d | 540 | preempt_enable(); |
c7e3ba64 | 541 | kvm_timer_sync_hwstate(vcpu); |
1a89dd91 | 542 | kvm_vgic_sync_hwstate(vcpu); |
f7ed45be CD |
543 | continue; |
544 | } | |
545 | ||
546 | /************************************************************** | |
547 | * Enter the guest | |
548 | */ | |
549 | trace_kvm_entry(*vcpu_pc(vcpu)); | |
ccf73aaf | 550 | __kvm_guest_enter(); |
f7ed45be CD |
551 | vcpu->mode = IN_GUEST_MODE; |
552 | ||
553 | ret = kvm_call_hyp(__kvm_vcpu_run, vcpu); | |
554 | ||
555 | vcpu->mode = OUTSIDE_GUEST_MODE; | |
1b3d546d CD |
556 | /* |
557 | * Back from guest | |
558 | *************************************************************/ | |
559 | ||
f7ed45be CD |
560 | /* |
561 | * We may have taken a host interrupt in HYP mode (ie | |
562 | * while executing the guest). This interrupt is still | |
563 | * pending, as we haven't serviced it yet! | |
564 | * | |
565 | * We're now back in SVC mode, with interrupts | |
566 | * disabled. Enabling the interrupts now will have | |
567 | * the effect of taking the interrupt again, in SVC | |
568 | * mode this time. | |
569 | */ | |
570 | local_irq_enable(); | |
571 | ||
572 | /* | |
1b3d546d CD |
573 | * We do local_irq_enable() before calling kvm_guest_exit() so |
574 | * that if a timer interrupt hits while running the guest we | |
575 | * account that tick as being spent in the guest. We enable | |
576 | * preemption after calling kvm_guest_exit() so that if we get | |
577 | * preempted we make sure ticks after that is not counted as | |
578 | * guest time. | |
579 | */ | |
580 | kvm_guest_exit(); | |
581 | trace_kvm_exit(kvm_vcpu_trap_get_class(vcpu), *vcpu_pc(vcpu)); | |
582 | preempt_enable(); | |
583 | ||
f7ed45be | 584 | |
c7e3ba64 | 585 | kvm_timer_sync_hwstate(vcpu); |
1a89dd91 MZ |
586 | kvm_vgic_sync_hwstate(vcpu); |
587 | ||
f7ed45be CD |
588 | ret = handle_exit(vcpu, run, ret); |
589 | } | |
590 | ||
591 | if (vcpu->sigset_active) | |
592 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
593 | return ret; | |
749cf76c CD |
594 | } |
595 | ||
86ce8535 CD |
596 | static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level) |
597 | { | |
598 | int bit_index; | |
599 | bool set; | |
600 | unsigned long *ptr; | |
601 | ||
602 | if (number == KVM_ARM_IRQ_CPU_IRQ) | |
603 | bit_index = __ffs(HCR_VI); | |
604 | else /* KVM_ARM_IRQ_CPU_FIQ */ | |
605 | bit_index = __ffs(HCR_VF); | |
606 | ||
607 | ptr = (unsigned long *)&vcpu->arch.irq_lines; | |
608 | if (level) | |
609 | set = test_and_set_bit(bit_index, ptr); | |
610 | else | |
611 | set = test_and_clear_bit(bit_index, ptr); | |
612 | ||
613 | /* | |
614 | * If we didn't change anything, no need to wake up or kick other CPUs | |
615 | */ | |
616 | if (set == level) | |
617 | return 0; | |
618 | ||
619 | /* | |
620 | * The vcpu irq_lines field was updated, wake up sleeping VCPUs and | |
621 | * trigger a world-switch round on the running physical CPU to set the | |
622 | * virtual IRQ/FIQ fields in the HCR appropriately. | |
623 | */ | |
624 | kvm_vcpu_kick(vcpu); | |
625 | ||
626 | return 0; | |
627 | } | |
628 | ||
79558f11 AG |
629 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, |
630 | bool line_status) | |
86ce8535 CD |
631 | { |
632 | u32 irq = irq_level->irq; | |
633 | unsigned int irq_type, vcpu_idx, irq_num; | |
634 | int nrcpus = atomic_read(&kvm->online_vcpus); | |
635 | struct kvm_vcpu *vcpu = NULL; | |
636 | bool level = irq_level->level; | |
637 | ||
638 | irq_type = (irq >> KVM_ARM_IRQ_TYPE_SHIFT) & KVM_ARM_IRQ_TYPE_MASK; | |
639 | vcpu_idx = (irq >> KVM_ARM_IRQ_VCPU_SHIFT) & KVM_ARM_IRQ_VCPU_MASK; | |
640 | irq_num = (irq >> KVM_ARM_IRQ_NUM_SHIFT) & KVM_ARM_IRQ_NUM_MASK; | |
641 | ||
642 | trace_kvm_irq_line(irq_type, vcpu_idx, irq_num, irq_level->level); | |
643 | ||
5863c2ce MZ |
644 | switch (irq_type) { |
645 | case KVM_ARM_IRQ_TYPE_CPU: | |
646 | if (irqchip_in_kernel(kvm)) | |
647 | return -ENXIO; | |
86ce8535 | 648 | |
5863c2ce MZ |
649 | if (vcpu_idx >= nrcpus) |
650 | return -EINVAL; | |
86ce8535 | 651 | |
5863c2ce MZ |
652 | vcpu = kvm_get_vcpu(kvm, vcpu_idx); |
653 | if (!vcpu) | |
654 | return -EINVAL; | |
86ce8535 | 655 | |
5863c2ce MZ |
656 | if (irq_num > KVM_ARM_IRQ_CPU_FIQ) |
657 | return -EINVAL; | |
658 | ||
659 | return vcpu_interrupt_line(vcpu, irq_num, level); | |
660 | case KVM_ARM_IRQ_TYPE_PPI: | |
661 | if (!irqchip_in_kernel(kvm)) | |
662 | return -ENXIO; | |
663 | ||
664 | if (vcpu_idx >= nrcpus) | |
665 | return -EINVAL; | |
666 | ||
667 | vcpu = kvm_get_vcpu(kvm, vcpu_idx); | |
668 | if (!vcpu) | |
669 | return -EINVAL; | |
670 | ||
671 | if (irq_num < VGIC_NR_SGIS || irq_num >= VGIC_NR_PRIVATE_IRQS) | |
672 | return -EINVAL; | |
86ce8535 | 673 | |
5863c2ce MZ |
674 | return kvm_vgic_inject_irq(kvm, vcpu->vcpu_id, irq_num, level); |
675 | case KVM_ARM_IRQ_TYPE_SPI: | |
676 | if (!irqchip_in_kernel(kvm)) | |
677 | return -ENXIO; | |
678 | ||
fd1d0ddf | 679 | if (irq_num < VGIC_NR_PRIVATE_IRQS) |
5863c2ce MZ |
680 | return -EINVAL; |
681 | ||
682 | return kvm_vgic_inject_irq(kvm, 0, irq_num, level); | |
683 | } | |
684 | ||
685 | return -EINVAL; | |
86ce8535 CD |
686 | } |
687 | ||
f7fa034d CD |
688 | static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, |
689 | const struct kvm_vcpu_init *init) | |
690 | { | |
691 | unsigned int i; | |
692 | int phys_target = kvm_target_cpu(); | |
693 | ||
694 | if (init->target != phys_target) | |
695 | return -EINVAL; | |
696 | ||
697 | /* | |
698 | * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must | |
699 | * use the same target. | |
700 | */ | |
701 | if (vcpu->arch.target != -1 && vcpu->arch.target != init->target) | |
702 | return -EINVAL; | |
703 | ||
704 | /* -ENOENT for unknown features, -EINVAL for invalid combinations. */ | |
705 | for (i = 0; i < sizeof(init->features) * 8; i++) { | |
706 | bool set = (init->features[i / 32] & (1 << (i % 32))); | |
707 | ||
708 | if (set && i >= KVM_VCPU_MAX_FEATURES) | |
709 | return -ENOENT; | |
710 | ||
711 | /* | |
712 | * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must | |
713 | * use the same feature set. | |
714 | */ | |
715 | if (vcpu->arch.target != -1 && i < KVM_VCPU_MAX_FEATURES && | |
716 | test_bit(i, vcpu->arch.features) != set) | |
717 | return -EINVAL; | |
718 | ||
719 | if (set) | |
720 | set_bit(i, vcpu->arch.features); | |
721 | } | |
722 | ||
723 | vcpu->arch.target = phys_target; | |
724 | ||
725 | /* Now we know what it is, we can reset it. */ | |
726 | return kvm_reset_vcpu(vcpu); | |
727 | } | |
728 | ||
729 | ||
478a8237 CD |
730 | static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu, |
731 | struct kvm_vcpu_init *init) | |
732 | { | |
733 | int ret; | |
734 | ||
735 | ret = kvm_vcpu_set_target(vcpu, init); | |
736 | if (ret) | |
737 | return ret; | |
738 | ||
957db105 CD |
739 | /* |
740 | * Ensure a rebooted VM will fault in RAM pages and detect if the | |
741 | * guest MMU is turned off and flush the caches as needed. | |
742 | */ | |
743 | if (vcpu->arch.has_run_once) | |
744 | stage2_unmap_vm(vcpu->kvm); | |
745 | ||
b856a591 CD |
746 | vcpu_reset_hcr(vcpu); |
747 | ||
478a8237 CD |
748 | /* |
749 | * Handle the "start in power-off" case by marking the VCPU as paused. | |
750 | */ | |
03f1d4c1 | 751 | if (test_bit(KVM_ARM_VCPU_POWER_OFF, vcpu->arch.features)) |
478a8237 | 752 | vcpu->arch.pause = true; |
3ad8b3de CD |
753 | else |
754 | vcpu->arch.pause = false; | |
478a8237 CD |
755 | |
756 | return 0; | |
757 | } | |
758 | ||
749cf76c CD |
759 | long kvm_arch_vcpu_ioctl(struct file *filp, |
760 | unsigned int ioctl, unsigned long arg) | |
761 | { | |
762 | struct kvm_vcpu *vcpu = filp->private_data; | |
763 | void __user *argp = (void __user *)arg; | |
764 | ||
765 | switch (ioctl) { | |
766 | case KVM_ARM_VCPU_INIT: { | |
767 | struct kvm_vcpu_init init; | |
768 | ||
769 | if (copy_from_user(&init, argp, sizeof(init))) | |
770 | return -EFAULT; | |
771 | ||
478a8237 | 772 | return kvm_arch_vcpu_ioctl_vcpu_init(vcpu, &init); |
749cf76c CD |
773 | } |
774 | case KVM_SET_ONE_REG: | |
775 | case KVM_GET_ONE_REG: { | |
776 | struct kvm_one_reg reg; | |
e8180dca AP |
777 | |
778 | if (unlikely(!kvm_vcpu_initialized(vcpu))) | |
779 | return -ENOEXEC; | |
780 | ||
749cf76c CD |
781 | if (copy_from_user(®, argp, sizeof(reg))) |
782 | return -EFAULT; | |
783 | if (ioctl == KVM_SET_ONE_REG) | |
784 | return kvm_arm_set_reg(vcpu, ®); | |
785 | else | |
786 | return kvm_arm_get_reg(vcpu, ®); | |
787 | } | |
788 | case KVM_GET_REG_LIST: { | |
789 | struct kvm_reg_list __user *user_list = argp; | |
790 | struct kvm_reg_list reg_list; | |
791 | unsigned n; | |
792 | ||
e8180dca AP |
793 | if (unlikely(!kvm_vcpu_initialized(vcpu))) |
794 | return -ENOEXEC; | |
795 | ||
749cf76c CD |
796 | if (copy_from_user(®_list, user_list, sizeof(reg_list))) |
797 | return -EFAULT; | |
798 | n = reg_list.n; | |
799 | reg_list.n = kvm_arm_num_regs(vcpu); | |
800 | if (copy_to_user(user_list, ®_list, sizeof(reg_list))) | |
801 | return -EFAULT; | |
802 | if (n < reg_list.n) | |
803 | return -E2BIG; | |
804 | return kvm_arm_copy_reg_indices(vcpu, user_list->reg); | |
805 | } | |
806 | default: | |
807 | return -EINVAL; | |
808 | } | |
809 | } | |
810 | ||
53c810c3 MS |
811 | /** |
812 | * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot | |
813 | * @kvm: kvm instance | |
814 | * @log: slot id and address to which we copy the log | |
815 | * | |
816 | * Steps 1-4 below provide general overview of dirty page logging. See | |
817 | * kvm_get_dirty_log_protect() function description for additional details. | |
818 | * | |
819 | * We call kvm_get_dirty_log_protect() to handle steps 1-3, upon return we | |
820 | * always flush the TLB (step 4) even if previous step failed and the dirty | |
821 | * bitmap may be corrupt. Regardless of previous outcome the KVM logging API | |
822 | * does not preclude user space subsequent dirty log read. Flushing TLB ensures | |
823 | * writes will be marked dirty for next log read. | |
824 | * | |
825 | * 1. Take a snapshot of the bit and clear it if needed. | |
826 | * 2. Write protect the corresponding page. | |
827 | * 3. Copy the snapshot to the userspace. | |
828 | * 4. Flush TLB's if needed. | |
829 | */ | |
749cf76c CD |
830 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
831 | { | |
53c810c3 MS |
832 | bool is_dirty = false; |
833 | int r; | |
834 | ||
835 | mutex_lock(&kvm->slots_lock); | |
836 | ||
837 | r = kvm_get_dirty_log_protect(kvm, log, &is_dirty); | |
838 | ||
839 | if (is_dirty) | |
840 | kvm_flush_remote_tlbs(kvm); | |
841 | ||
842 | mutex_unlock(&kvm->slots_lock); | |
843 | return r; | |
749cf76c CD |
844 | } |
845 | ||
3401d546 CD |
846 | static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm, |
847 | struct kvm_arm_device_addr *dev_addr) | |
848 | { | |
330690cd CD |
849 | unsigned long dev_id, type; |
850 | ||
851 | dev_id = (dev_addr->id & KVM_ARM_DEVICE_ID_MASK) >> | |
852 | KVM_ARM_DEVICE_ID_SHIFT; | |
853 | type = (dev_addr->id & KVM_ARM_DEVICE_TYPE_MASK) >> | |
854 | KVM_ARM_DEVICE_TYPE_SHIFT; | |
855 | ||
856 | switch (dev_id) { | |
857 | case KVM_ARM_DEVICE_VGIC_V2: | |
ce01e4e8 | 858 | return kvm_vgic_addr(kvm, type, &dev_addr->addr, true); |
330690cd CD |
859 | default: |
860 | return -ENODEV; | |
861 | } | |
3401d546 CD |
862 | } |
863 | ||
749cf76c CD |
864 | long kvm_arch_vm_ioctl(struct file *filp, |
865 | unsigned int ioctl, unsigned long arg) | |
866 | { | |
3401d546 CD |
867 | struct kvm *kvm = filp->private_data; |
868 | void __user *argp = (void __user *)arg; | |
869 | ||
870 | switch (ioctl) { | |
5863c2ce | 871 | case KVM_CREATE_IRQCHIP: { |
69ff5c61 | 872 | return kvm_vgic_create(kvm, KVM_DEV_TYPE_ARM_VGIC_V2); |
5863c2ce | 873 | } |
3401d546 CD |
874 | case KVM_ARM_SET_DEVICE_ADDR: { |
875 | struct kvm_arm_device_addr dev_addr; | |
876 | ||
877 | if (copy_from_user(&dev_addr, argp, sizeof(dev_addr))) | |
878 | return -EFAULT; | |
879 | return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr); | |
880 | } | |
42c4e0c7 AP |
881 | case KVM_ARM_PREFERRED_TARGET: { |
882 | int err; | |
883 | struct kvm_vcpu_init init; | |
884 | ||
885 | err = kvm_vcpu_preferred_target(&init); | |
886 | if (err) | |
887 | return err; | |
888 | ||
889 | if (copy_to_user(argp, &init, sizeof(init))) | |
890 | return -EFAULT; | |
891 | ||
892 | return 0; | |
893 | } | |
3401d546 CD |
894 | default: |
895 | return -EINVAL; | |
896 | } | |
749cf76c CD |
897 | } |
898 | ||
d157f4a5 | 899 | static void cpu_init_hyp_mode(void *dummy) |
342cd0ab | 900 | { |
dac288f7 MZ |
901 | phys_addr_t boot_pgd_ptr; |
902 | phys_addr_t pgd_ptr; | |
342cd0ab CD |
903 | unsigned long hyp_stack_ptr; |
904 | unsigned long stack_page; | |
905 | unsigned long vector_ptr; | |
906 | ||
907 | /* Switch from the HYP stub to our own HYP init vector */ | |
5a677ce0 | 908 | __hyp_set_vectors(kvm_get_idmap_vector()); |
342cd0ab | 909 | |
dac288f7 MZ |
910 | boot_pgd_ptr = kvm_mmu_get_boot_httbr(); |
911 | pgd_ptr = kvm_mmu_get_httbr(); | |
1436c1aa | 912 | stack_page = __this_cpu_read(kvm_arm_hyp_stack_page); |
342cd0ab CD |
913 | hyp_stack_ptr = stack_page + PAGE_SIZE; |
914 | vector_ptr = (unsigned long)__kvm_hyp_vector; | |
915 | ||
5a677ce0 | 916 | __cpu_init_hyp_mode(boot_pgd_ptr, pgd_ptr, hyp_stack_ptr, vector_ptr); |
342cd0ab CD |
917 | } |
918 | ||
d157f4a5 MZ |
919 | static int hyp_init_cpu_notify(struct notifier_block *self, |
920 | unsigned long action, void *cpu) | |
921 | { | |
922 | switch (action) { | |
923 | case CPU_STARTING: | |
924 | case CPU_STARTING_FROZEN: | |
37a34ac1 VM |
925 | if (__hyp_get_vectors() == hyp_default_vectors) |
926 | cpu_init_hyp_mode(NULL); | |
d157f4a5 MZ |
927 | break; |
928 | } | |
929 | ||
930 | return NOTIFY_OK; | |
342cd0ab CD |
931 | } |
932 | ||
d157f4a5 MZ |
933 | static struct notifier_block hyp_init_cpu_nb = { |
934 | .notifier_call = hyp_init_cpu_notify, | |
935 | }; | |
936 | ||
1fcf7ce0 LP |
937 | #ifdef CONFIG_CPU_PM |
938 | static int hyp_init_cpu_pm_notifier(struct notifier_block *self, | |
939 | unsigned long cmd, | |
940 | void *v) | |
941 | { | |
b20c9f29 MZ |
942 | if (cmd == CPU_PM_EXIT && |
943 | __hyp_get_vectors() == hyp_default_vectors) { | |
1fcf7ce0 LP |
944 | cpu_init_hyp_mode(NULL); |
945 | return NOTIFY_OK; | |
946 | } | |
947 | ||
948 | return NOTIFY_DONE; | |
949 | } | |
950 | ||
951 | static struct notifier_block hyp_init_cpu_pm_nb = { | |
952 | .notifier_call = hyp_init_cpu_pm_notifier, | |
953 | }; | |
954 | ||
955 | static void __init hyp_cpu_pm_init(void) | |
956 | { | |
957 | cpu_pm_register_notifier(&hyp_init_cpu_pm_nb); | |
958 | } | |
959 | #else | |
960 | static inline void hyp_cpu_pm_init(void) | |
961 | { | |
962 | } | |
963 | #endif | |
964 | ||
342cd0ab CD |
965 | /** |
966 | * Inits Hyp-mode on all online CPUs | |
967 | */ | |
968 | static int init_hyp_mode(void) | |
969 | { | |
342cd0ab CD |
970 | int cpu; |
971 | int err = 0; | |
972 | ||
973 | /* | |
974 | * Allocate Hyp PGD and setup Hyp identity mapping | |
975 | */ | |
976 | err = kvm_mmu_init(); | |
977 | if (err) | |
978 | goto out_err; | |
979 | ||
980 | /* | |
981 | * It is probably enough to obtain the default on one | |
982 | * CPU. It's unlikely to be different on the others. | |
983 | */ | |
984 | hyp_default_vectors = __hyp_get_vectors(); | |
985 | ||
986 | /* | |
987 | * Allocate stack pages for Hypervisor-mode | |
988 | */ | |
989 | for_each_possible_cpu(cpu) { | |
990 | unsigned long stack_page; | |
991 | ||
992 | stack_page = __get_free_page(GFP_KERNEL); | |
993 | if (!stack_page) { | |
994 | err = -ENOMEM; | |
995 | goto out_free_stack_pages; | |
996 | } | |
997 | ||
998 | per_cpu(kvm_arm_hyp_stack_page, cpu) = stack_page; | |
999 | } | |
1000 | ||
342cd0ab CD |
1001 | /* |
1002 | * Map the Hyp-code called directly from the host | |
1003 | */ | |
1004 | err = create_hyp_mappings(__kvm_hyp_code_start, __kvm_hyp_code_end); | |
1005 | if (err) { | |
1006 | kvm_err("Cannot map world-switch code\n"); | |
1007 | goto out_free_mappings; | |
1008 | } | |
1009 | ||
1010 | /* | |
1011 | * Map the Hyp stack pages | |
1012 | */ | |
1013 | for_each_possible_cpu(cpu) { | |
1014 | char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu); | |
1015 | err = create_hyp_mappings(stack_page, stack_page + PAGE_SIZE); | |
1016 | ||
1017 | if (err) { | |
1018 | kvm_err("Cannot map hyp stack\n"); | |
1019 | goto out_free_mappings; | |
1020 | } | |
1021 | } | |
1022 | ||
1023 | /* | |
3de50da6 | 1024 | * Map the host CPU structures |
342cd0ab | 1025 | */ |
3de50da6 MZ |
1026 | kvm_host_cpu_state = alloc_percpu(kvm_cpu_context_t); |
1027 | if (!kvm_host_cpu_state) { | |
342cd0ab | 1028 | err = -ENOMEM; |
3de50da6 | 1029 | kvm_err("Cannot allocate host CPU state\n"); |
342cd0ab CD |
1030 | goto out_free_mappings; |
1031 | } | |
1032 | ||
1033 | for_each_possible_cpu(cpu) { | |
3de50da6 | 1034 | kvm_cpu_context_t *cpu_ctxt; |
342cd0ab | 1035 | |
3de50da6 MZ |
1036 | cpu_ctxt = per_cpu_ptr(kvm_host_cpu_state, cpu); |
1037 | err = create_hyp_mappings(cpu_ctxt, cpu_ctxt + 1); | |
342cd0ab CD |
1038 | |
1039 | if (err) { | |
3de50da6 MZ |
1040 | kvm_err("Cannot map host CPU state: %d\n", err); |
1041 | goto out_free_context; | |
342cd0ab CD |
1042 | } |
1043 | } | |
1044 | ||
d157f4a5 MZ |
1045 | /* |
1046 | * Execute the init code on each CPU. | |
1047 | */ | |
1048 | on_each_cpu(cpu_init_hyp_mode, NULL, 1); | |
1049 | ||
1a89dd91 MZ |
1050 | /* |
1051 | * Init HYP view of VGIC | |
1052 | */ | |
1053 | err = kvm_vgic_hyp_init(); | |
1054 | if (err) | |
3de50da6 | 1055 | goto out_free_context; |
1a89dd91 | 1056 | |
967f8427 MZ |
1057 | /* |
1058 | * Init HYP architected timer support | |
1059 | */ | |
1060 | err = kvm_timer_hyp_init(); | |
1061 | if (err) | |
1062 | goto out_free_mappings; | |
1063 | ||
d157f4a5 MZ |
1064 | #ifndef CONFIG_HOTPLUG_CPU |
1065 | free_boot_hyp_pgd(); | |
1066 | #endif | |
1067 | ||
210552c1 MZ |
1068 | kvm_perf_init(); |
1069 | ||
342cd0ab | 1070 | kvm_info("Hyp mode initialized successfully\n"); |
210552c1 | 1071 | |
342cd0ab | 1072 | return 0; |
3de50da6 MZ |
1073 | out_free_context: |
1074 | free_percpu(kvm_host_cpu_state); | |
342cd0ab | 1075 | out_free_mappings: |
4f728276 | 1076 | free_hyp_pgds(); |
342cd0ab CD |
1077 | out_free_stack_pages: |
1078 | for_each_possible_cpu(cpu) | |
1079 | free_page(per_cpu(kvm_arm_hyp_stack_page, cpu)); | |
1080 | out_err: | |
1081 | kvm_err("error initializing Hyp mode: %d\n", err); | |
1082 | return err; | |
1083 | } | |
1084 | ||
d4e071ce AP |
1085 | static void check_kvm_target_cpu(void *ret) |
1086 | { | |
1087 | *(int *)ret = kvm_target_cpu(); | |
1088 | } | |
1089 | ||
4429fc64 AP |
1090 | struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr) |
1091 | { | |
1092 | struct kvm_vcpu *vcpu; | |
1093 | int i; | |
1094 | ||
1095 | mpidr &= MPIDR_HWID_BITMASK; | |
1096 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1097 | if (mpidr == kvm_vcpu_get_mpidr_aff(vcpu)) | |
1098 | return vcpu; | |
1099 | } | |
1100 | return NULL; | |
1101 | } | |
1102 | ||
342cd0ab CD |
1103 | /** |
1104 | * Initialize Hyp-mode and memory mappings on all CPUs. | |
1105 | */ | |
749cf76c CD |
1106 | int kvm_arch_init(void *opaque) |
1107 | { | |
342cd0ab | 1108 | int err; |
d4e071ce | 1109 | int ret, cpu; |
342cd0ab CD |
1110 | |
1111 | if (!is_hyp_mode_available()) { | |
1112 | kvm_err("HYP mode not available\n"); | |
1113 | return -ENODEV; | |
1114 | } | |
1115 | ||
d4e071ce AP |
1116 | for_each_online_cpu(cpu) { |
1117 | smp_call_function_single(cpu, check_kvm_target_cpu, &ret, 1); | |
1118 | if (ret < 0) { | |
1119 | kvm_err("Error, CPU %d not supported!\n", cpu); | |
1120 | return -ENODEV; | |
1121 | } | |
342cd0ab CD |
1122 | } |
1123 | ||
8146875d SB |
1124 | cpu_notifier_register_begin(); |
1125 | ||
342cd0ab CD |
1126 | err = init_hyp_mode(); |
1127 | if (err) | |
1128 | goto out_err; | |
1129 | ||
8146875d | 1130 | err = __register_cpu_notifier(&hyp_init_cpu_nb); |
d157f4a5 MZ |
1131 | if (err) { |
1132 | kvm_err("Cannot register HYP init CPU notifier (%d)\n", err); | |
1133 | goto out_err; | |
1134 | } | |
1135 | ||
8146875d SB |
1136 | cpu_notifier_register_done(); |
1137 | ||
1fcf7ce0 LP |
1138 | hyp_cpu_pm_init(); |
1139 | ||
5b3e5e5b | 1140 | kvm_coproc_table_init(); |
749cf76c | 1141 | return 0; |
342cd0ab | 1142 | out_err: |
8146875d | 1143 | cpu_notifier_register_done(); |
342cd0ab | 1144 | return err; |
749cf76c CD |
1145 | } |
1146 | ||
1147 | /* NOP: Compiling as a module not supported */ | |
1148 | void kvm_arch_exit(void) | |
1149 | { | |
210552c1 | 1150 | kvm_perf_teardown(); |
749cf76c CD |
1151 | } |
1152 | ||
1153 | static int arm_init(void) | |
1154 | { | |
1155 | int rc = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); | |
1156 | return rc; | |
1157 | } | |
1158 | ||
1159 | module_init(arm_init); |