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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 | ||
6c3d63c9 | 128 | kvm_vgic_early_init(kvm); |
a1a64387 CD |
129 | kvm_timer_init(kvm); |
130 | ||
d5d8184d CD |
131 | /* Mark the initial VMID generation invalid */ |
132 | kvm->arch.vmid_gen = 0; | |
133 | ||
3caa2d8c AP |
134 | /* The maximum number of VCPUs is limited by the host's GIC model */ |
135 | kvm->arch.max_vcpus = kvm_vgic_get_max_vcpus(); | |
136 | ||
d5d8184d CD |
137 | return ret; |
138 | out_free_stage2_pgd: | |
139 | kvm_free_stage2_pgd(kvm); | |
140 | out_fail_alloc: | |
141 | return ret; | |
749cf76c CD |
142 | } |
143 | ||
144 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) | |
145 | { | |
146 | return VM_FAULT_SIGBUS; | |
147 | } | |
148 | ||
749cf76c | 149 | |
d5d8184d CD |
150 | /** |
151 | * kvm_arch_destroy_vm - destroy the VM data structure | |
152 | * @kvm: pointer to the KVM struct | |
153 | */ | |
749cf76c CD |
154 | void kvm_arch_destroy_vm(struct kvm *kvm) |
155 | { | |
156 | int i; | |
157 | ||
d5d8184d CD |
158 | kvm_free_stage2_pgd(kvm); |
159 | ||
749cf76c CD |
160 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
161 | if (kvm->vcpus[i]) { | |
162 | kvm_arch_vcpu_free(kvm->vcpus[i]); | |
163 | kvm->vcpus[i] = NULL; | |
164 | } | |
165 | } | |
c1bfb577 MZ |
166 | |
167 | kvm_vgic_destroy(kvm); | |
749cf76c CD |
168 | } |
169 | ||
784aa3d7 | 170 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
749cf76c CD |
171 | { |
172 | int r; | |
173 | switch (ext) { | |
1a89dd91 | 174 | case KVM_CAP_IRQCHIP: |
d44758c0 | 175 | case KVM_CAP_IOEVENTFD: |
7330672b | 176 | case KVM_CAP_DEVICE_CTRL: |
749cf76c CD |
177 | case KVM_CAP_USER_MEMORY: |
178 | case KVM_CAP_SYNC_MMU: | |
179 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: | |
180 | case KVM_CAP_ONE_REG: | |
aa024c2f | 181 | case KVM_CAP_ARM_PSCI: |
4447a208 | 182 | case KVM_CAP_ARM_PSCI_0_2: |
98047888 | 183 | case KVM_CAP_READONLY_MEM: |
ecccf0cc | 184 | case KVM_CAP_MP_STATE: |
749cf76c CD |
185 | r = 1; |
186 | break; | |
187 | case KVM_CAP_COALESCED_MMIO: | |
188 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
189 | break; | |
3401d546 CD |
190 | case KVM_CAP_ARM_SET_DEVICE_ADDR: |
191 | r = 1; | |
ca46e10f | 192 | break; |
749cf76c CD |
193 | case KVM_CAP_NR_VCPUS: |
194 | r = num_online_cpus(); | |
195 | break; | |
196 | case KVM_CAP_MAX_VCPUS: | |
197 | r = KVM_MAX_VCPUS; | |
198 | break; | |
199 | default: | |
17b1e31f | 200 | r = kvm_arch_dev_ioctl_check_extension(ext); |
749cf76c CD |
201 | break; |
202 | } | |
203 | return r; | |
204 | } | |
205 | ||
206 | long kvm_arch_dev_ioctl(struct file *filp, | |
207 | unsigned int ioctl, unsigned long arg) | |
208 | { | |
209 | return -EINVAL; | |
210 | } | |
211 | ||
749cf76c CD |
212 | |
213 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) | |
214 | { | |
215 | int err; | |
216 | struct kvm_vcpu *vcpu; | |
217 | ||
716139df CD |
218 | if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) { |
219 | err = -EBUSY; | |
220 | goto out; | |
221 | } | |
222 | ||
3caa2d8c AP |
223 | if (id >= kvm->arch.max_vcpus) { |
224 | err = -EINVAL; | |
225 | goto out; | |
226 | } | |
227 | ||
749cf76c CD |
228 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
229 | if (!vcpu) { | |
230 | err = -ENOMEM; | |
231 | goto out; | |
232 | } | |
233 | ||
234 | err = kvm_vcpu_init(vcpu, kvm, id); | |
235 | if (err) | |
236 | goto free_vcpu; | |
237 | ||
d5d8184d CD |
238 | err = create_hyp_mappings(vcpu, vcpu + 1); |
239 | if (err) | |
240 | goto vcpu_uninit; | |
241 | ||
749cf76c | 242 | return vcpu; |
d5d8184d CD |
243 | vcpu_uninit: |
244 | kvm_vcpu_uninit(vcpu); | |
749cf76c CD |
245 | free_vcpu: |
246 | kmem_cache_free(kvm_vcpu_cache, vcpu); | |
247 | out: | |
248 | return ERR_PTR(err); | |
249 | } | |
250 | ||
31928aa5 | 251 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
749cf76c | 252 | { |
6c3d63c9 | 253 | kvm_vgic_vcpu_early_init(vcpu); |
749cf76c CD |
254 | } |
255 | ||
256 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
257 | { | |
d5d8184d | 258 | kvm_mmu_free_memory_caches(vcpu); |
967f8427 | 259 | kvm_timer_vcpu_terminate(vcpu); |
c1bfb577 | 260 | kvm_vgic_vcpu_destroy(vcpu); |
d5d8184d | 261 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
749cf76c CD |
262 | } |
263 | ||
264 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) | |
265 | { | |
266 | kvm_arch_vcpu_free(vcpu); | |
267 | } | |
268 | ||
269 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) | |
270 | { | |
1a748478 | 271 | return kvm_timer_should_fire(vcpu); |
749cf76c CD |
272 | } |
273 | ||
749cf76c CD |
274 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
275 | { | |
f7ed45be CD |
276 | /* Force users to call KVM_ARM_VCPU_INIT */ |
277 | vcpu->arch.target = -1; | |
f7fa034d | 278 | bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES); |
1a89dd91 | 279 | |
967f8427 MZ |
280 | /* Set up the timer */ |
281 | kvm_timer_vcpu_init(vcpu); | |
282 | ||
84e690bf AB |
283 | kvm_arm_reset_debug_ptr(vcpu); |
284 | ||
749cf76c CD |
285 | return 0; |
286 | } | |
287 | ||
749cf76c CD |
288 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
289 | { | |
86ce8535 | 290 | vcpu->cpu = cpu; |
3de50da6 | 291 | vcpu->arch.host_cpu_context = this_cpu_ptr(kvm_host_cpu_state); |
5b3e5e5b | 292 | |
1638a12d | 293 | kvm_arm_set_running_vcpu(vcpu); |
749cf76c CD |
294 | } |
295 | ||
296 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
297 | { | |
e9b152cb CD |
298 | /* |
299 | * The arch-generic KVM code expects the cpu field of a vcpu to be -1 | |
300 | * if the vcpu is no longer assigned to a cpu. This is used for the | |
301 | * optimized make_all_cpus_request path. | |
302 | */ | |
303 | vcpu->cpu = -1; | |
304 | ||
1638a12d | 305 | kvm_arm_set_running_vcpu(NULL); |
749cf76c CD |
306 | } |
307 | ||
749cf76c CD |
308 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
309 | struct kvm_mp_state *mp_state) | |
310 | { | |
ecccf0cc AB |
311 | if (vcpu->arch.pause) |
312 | mp_state->mp_state = KVM_MP_STATE_STOPPED; | |
313 | else | |
314 | mp_state->mp_state = KVM_MP_STATE_RUNNABLE; | |
315 | ||
316 | return 0; | |
749cf76c CD |
317 | } |
318 | ||
319 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
320 | struct kvm_mp_state *mp_state) | |
321 | { | |
ecccf0cc AB |
322 | switch (mp_state->mp_state) { |
323 | case KVM_MP_STATE_RUNNABLE: | |
324 | vcpu->arch.pause = false; | |
325 | break; | |
326 | case KVM_MP_STATE_STOPPED: | |
327 | vcpu->arch.pause = true; | |
328 | break; | |
329 | default: | |
330 | return -EINVAL; | |
331 | } | |
332 | ||
333 | return 0; | |
749cf76c CD |
334 | } |
335 | ||
5b3e5e5b CD |
336 | /** |
337 | * kvm_arch_vcpu_runnable - determine if the vcpu can be scheduled | |
338 | * @v: The VCPU pointer | |
339 | * | |
340 | * If the guest CPU is not waiting for interrupts or an interrupt line is | |
341 | * asserted, the CPU is by definition runnable. | |
342 | */ | |
749cf76c CD |
343 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) |
344 | { | |
1a89dd91 | 345 | return !!v->arch.irq_lines || kvm_vgic_vcpu_pending_irq(v); |
749cf76c CD |
346 | } |
347 | ||
f7ed45be CD |
348 | /* Just ensure a guest exit from a particular CPU */ |
349 | static void exit_vm_noop(void *info) | |
350 | { | |
351 | } | |
352 | ||
353 | void force_vm_exit(const cpumask_t *mask) | |
354 | { | |
355 | smp_call_function_many(mask, exit_vm_noop, NULL, true); | |
356 | } | |
357 | ||
358 | /** | |
359 | * need_new_vmid_gen - check that the VMID is still valid | |
360 | * @kvm: The VM's VMID to checkt | |
361 | * | |
362 | * return true if there is a new generation of VMIDs being used | |
363 | * | |
364 | * The hardware supports only 256 values with the value zero reserved for the | |
365 | * host, so we check if an assigned value belongs to a previous generation, | |
366 | * which which requires us to assign a new value. If we're the first to use a | |
367 | * VMID for the new generation, we must flush necessary caches and TLBs on all | |
368 | * CPUs. | |
369 | */ | |
370 | static bool need_new_vmid_gen(struct kvm *kvm) | |
371 | { | |
372 | return unlikely(kvm->arch.vmid_gen != atomic64_read(&kvm_vmid_gen)); | |
373 | } | |
374 | ||
375 | /** | |
376 | * update_vttbr - Update the VTTBR with a valid VMID before the guest runs | |
377 | * @kvm The guest that we are about to run | |
378 | * | |
379 | * Called from kvm_arch_vcpu_ioctl_run before entering the guest to ensure the | |
380 | * VM has a valid VMID, otherwise assigns a new one and flushes corresponding | |
381 | * caches and TLBs. | |
382 | */ | |
383 | static void update_vttbr(struct kvm *kvm) | |
384 | { | |
385 | phys_addr_t pgd_phys; | |
386 | u64 vmid; | |
387 | ||
388 | if (!need_new_vmid_gen(kvm)) | |
389 | return; | |
390 | ||
391 | spin_lock(&kvm_vmid_lock); | |
392 | ||
393 | /* | |
394 | * We need to re-check the vmid_gen here to ensure that if another vcpu | |
395 | * already allocated a valid vmid for this vm, then this vcpu should | |
396 | * use the same vmid. | |
397 | */ | |
398 | if (!need_new_vmid_gen(kvm)) { | |
399 | spin_unlock(&kvm_vmid_lock); | |
400 | return; | |
401 | } | |
402 | ||
403 | /* First user of a new VMID generation? */ | |
404 | if (unlikely(kvm_next_vmid == 0)) { | |
405 | atomic64_inc(&kvm_vmid_gen); | |
406 | kvm_next_vmid = 1; | |
407 | ||
408 | /* | |
409 | * On SMP we know no other CPUs can use this CPU's or each | |
410 | * other's VMID after force_vm_exit returns since the | |
411 | * kvm_vmid_lock blocks them from reentry to the guest. | |
412 | */ | |
413 | force_vm_exit(cpu_all_mask); | |
414 | /* | |
415 | * Now broadcast TLB + ICACHE invalidation over the inner | |
416 | * shareable domain to make sure all data structures are | |
417 | * clean. | |
418 | */ | |
419 | kvm_call_hyp(__kvm_flush_vm_context); | |
420 | } | |
421 | ||
422 | kvm->arch.vmid_gen = atomic64_read(&kvm_vmid_gen); | |
423 | kvm->arch.vmid = kvm_next_vmid; | |
424 | kvm_next_vmid++; | |
425 | ||
426 | /* update vttbr to be used with the new vmid */ | |
38f791a4 | 427 | pgd_phys = virt_to_phys(kvm_get_hwpgd(kvm)); |
dbff124e | 428 | BUG_ON(pgd_phys & ~VTTBR_BADDR_MASK); |
f7ed45be | 429 | vmid = ((u64)(kvm->arch.vmid) << VTTBR_VMID_SHIFT) & VTTBR_VMID_MASK; |
dbff124e | 430 | kvm->arch.vttbr = pgd_phys | vmid; |
f7ed45be CD |
431 | |
432 | spin_unlock(&kvm_vmid_lock); | |
433 | } | |
434 | ||
f7ed45be CD |
435 | static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu) |
436 | { | |
05971120 | 437 | struct kvm *kvm = vcpu->kvm; |
e1ba0207 CD |
438 | int ret; |
439 | ||
f7ed45be CD |
440 | if (likely(vcpu->arch.has_run_once)) |
441 | return 0; | |
442 | ||
443 | vcpu->arch.has_run_once = true; | |
aa024c2f | 444 | |
01ac5e34 | 445 | /* |
6d3cfbe2 PM |
446 | * Map the VGIC hardware resources before running a vcpu the first |
447 | * time on this VM. | |
01ac5e34 | 448 | */ |
c2f58514 | 449 | if (unlikely(irqchip_in_kernel(kvm) && !vgic_ready(kvm))) { |
05971120 | 450 | ret = kvm_vgic_map_resources(kvm); |
01ac5e34 MZ |
451 | if (ret) |
452 | return ret; | |
453 | } | |
454 | ||
05971120 CD |
455 | /* |
456 | * Enable the arch timers only if we have an in-kernel VGIC | |
457 | * and it has been properly initialized, since we cannot handle | |
458 | * interrupts from the virtual timer with a userspace gic. | |
459 | */ | |
460 | if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) | |
461 | kvm_timer_enable(kvm); | |
462 | ||
f7ed45be CD |
463 | return 0; |
464 | } | |
465 | ||
c1426e4c EA |
466 | bool kvm_arch_intc_initialized(struct kvm *kvm) |
467 | { | |
468 | return vgic_initialized(kvm); | |
469 | } | |
470 | ||
aa024c2f MZ |
471 | static void vcpu_pause(struct kvm_vcpu *vcpu) |
472 | { | |
473 | wait_queue_head_t *wq = kvm_arch_vcpu_wq(vcpu); | |
474 | ||
475 | wait_event_interruptible(*wq, !vcpu->arch.pause); | |
476 | } | |
477 | ||
e8180dca AP |
478 | static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu) |
479 | { | |
480 | return vcpu->arch.target >= 0; | |
481 | } | |
482 | ||
f7ed45be CD |
483 | /** |
484 | * kvm_arch_vcpu_ioctl_run - the main VCPU run function to execute guest code | |
485 | * @vcpu: The VCPU pointer | |
486 | * @run: The kvm_run structure pointer used for userspace state exchange | |
487 | * | |
488 | * This function is called through the VCPU_RUN ioctl called from user space. It | |
489 | * will execute VM code in a loop until the time slice for the process is used | |
490 | * or some emulation is needed from user space in which case the function will | |
491 | * return with return value 0 and with the kvm_run structure filled in with the | |
492 | * required data for the requested emulation. | |
493 | */ | |
749cf76c CD |
494 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) |
495 | { | |
f7ed45be CD |
496 | int ret; |
497 | sigset_t sigsaved; | |
498 | ||
e8180dca | 499 | if (unlikely(!kvm_vcpu_initialized(vcpu))) |
f7ed45be CD |
500 | return -ENOEXEC; |
501 | ||
502 | ret = kvm_vcpu_first_run_init(vcpu); | |
503 | if (ret) | |
504 | return ret; | |
505 | ||
45e96ea6 CD |
506 | if (run->exit_reason == KVM_EXIT_MMIO) { |
507 | ret = kvm_handle_mmio_return(vcpu, vcpu->run); | |
508 | if (ret) | |
509 | return ret; | |
510 | } | |
511 | ||
f7ed45be CD |
512 | if (vcpu->sigset_active) |
513 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
514 | ||
515 | ret = 1; | |
516 | run->exit_reason = KVM_EXIT_UNKNOWN; | |
517 | while (ret > 0) { | |
518 | /* | |
519 | * Check conditions before entering the guest | |
520 | */ | |
521 | cond_resched(); | |
522 | ||
523 | update_vttbr(vcpu->kvm); | |
524 | ||
aa024c2f MZ |
525 | if (vcpu->arch.pause) |
526 | vcpu_pause(vcpu); | |
527 | ||
abdf5843 MZ |
528 | /* |
529 | * Disarming the background timer must be done in a | |
530 | * preemptible context, as this call may sleep. | |
531 | */ | |
c7e3ba64 | 532 | kvm_timer_flush_hwstate(vcpu); |
1a89dd91 | 533 | |
abdf5843 MZ |
534 | /* |
535 | * Preparing the interrupts to be injected also | |
536 | * involves poking the GIC, which must be done in a | |
537 | * non-preemptible context. | |
538 | */ | |
1b3d546d | 539 | preempt_disable(); |
abdf5843 MZ |
540 | kvm_vgic_flush_hwstate(vcpu); |
541 | ||
f7ed45be CD |
542 | local_irq_disable(); |
543 | ||
544 | /* | |
545 | * Re-check atomic conditions | |
546 | */ | |
547 | if (signal_pending(current)) { | |
548 | ret = -EINTR; | |
549 | run->exit_reason = KVM_EXIT_INTR; | |
550 | } | |
551 | ||
552 | if (ret <= 0 || need_new_vmid_gen(vcpu->kvm)) { | |
553 | local_irq_enable(); | |
1a89dd91 | 554 | kvm_vgic_sync_hwstate(vcpu); |
abdf5843 | 555 | preempt_enable(); |
9a99d050 | 556 | kvm_timer_sync_hwstate(vcpu); |
f7ed45be CD |
557 | continue; |
558 | } | |
559 | ||
56c7f5e7 AB |
560 | kvm_arm_setup_debug(vcpu); |
561 | ||
f7ed45be CD |
562 | /************************************************************** |
563 | * Enter the guest | |
564 | */ | |
565 | trace_kvm_entry(*vcpu_pc(vcpu)); | |
ccf73aaf | 566 | __kvm_guest_enter(); |
f7ed45be CD |
567 | vcpu->mode = IN_GUEST_MODE; |
568 | ||
569 | ret = kvm_call_hyp(__kvm_vcpu_run, vcpu); | |
570 | ||
571 | vcpu->mode = OUTSIDE_GUEST_MODE; | |
1b3d546d CD |
572 | /* |
573 | * Back from guest | |
574 | *************************************************************/ | |
575 | ||
56c7f5e7 AB |
576 | kvm_arm_clear_debug(vcpu); |
577 | ||
f7ed45be CD |
578 | /* |
579 | * We may have taken a host interrupt in HYP mode (ie | |
580 | * while executing the guest). This interrupt is still | |
581 | * pending, as we haven't serviced it yet! | |
582 | * | |
583 | * We're now back in SVC mode, with interrupts | |
584 | * disabled. Enabling the interrupts now will have | |
585 | * the effect of taking the interrupt again, in SVC | |
586 | * mode this time. | |
587 | */ | |
588 | local_irq_enable(); | |
589 | ||
590 | /* | |
1b3d546d CD |
591 | * We do local_irq_enable() before calling kvm_guest_exit() so |
592 | * that if a timer interrupt hits while running the guest we | |
593 | * account that tick as being spent in the guest. We enable | |
594 | * preemption after calling kvm_guest_exit() so that if we get | |
595 | * preempted we make sure ticks after that is not counted as | |
596 | * guest time. | |
597 | */ | |
598 | kvm_guest_exit(); | |
599 | trace_kvm_exit(kvm_vcpu_trap_get_class(vcpu), *vcpu_pc(vcpu)); | |
1b3d546d | 600 | |
1a89dd91 | 601 | kvm_vgic_sync_hwstate(vcpu); |
abdf5843 MZ |
602 | |
603 | preempt_enable(); | |
604 | ||
9a99d050 | 605 | kvm_timer_sync_hwstate(vcpu); |
1a89dd91 | 606 | |
f7ed45be CD |
607 | ret = handle_exit(vcpu, run, ret); |
608 | } | |
609 | ||
610 | if (vcpu->sigset_active) | |
611 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
612 | return ret; | |
749cf76c CD |
613 | } |
614 | ||
86ce8535 CD |
615 | static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level) |
616 | { | |
617 | int bit_index; | |
618 | bool set; | |
619 | unsigned long *ptr; | |
620 | ||
621 | if (number == KVM_ARM_IRQ_CPU_IRQ) | |
622 | bit_index = __ffs(HCR_VI); | |
623 | else /* KVM_ARM_IRQ_CPU_FIQ */ | |
624 | bit_index = __ffs(HCR_VF); | |
625 | ||
626 | ptr = (unsigned long *)&vcpu->arch.irq_lines; | |
627 | if (level) | |
628 | set = test_and_set_bit(bit_index, ptr); | |
629 | else | |
630 | set = test_and_clear_bit(bit_index, ptr); | |
631 | ||
632 | /* | |
633 | * If we didn't change anything, no need to wake up or kick other CPUs | |
634 | */ | |
635 | if (set == level) | |
636 | return 0; | |
637 | ||
638 | /* | |
639 | * The vcpu irq_lines field was updated, wake up sleeping VCPUs and | |
640 | * trigger a world-switch round on the running physical CPU to set the | |
641 | * virtual IRQ/FIQ fields in the HCR appropriately. | |
642 | */ | |
643 | kvm_vcpu_kick(vcpu); | |
644 | ||
645 | return 0; | |
646 | } | |
647 | ||
79558f11 AG |
648 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, |
649 | bool line_status) | |
86ce8535 CD |
650 | { |
651 | u32 irq = irq_level->irq; | |
652 | unsigned int irq_type, vcpu_idx, irq_num; | |
653 | int nrcpus = atomic_read(&kvm->online_vcpus); | |
654 | struct kvm_vcpu *vcpu = NULL; | |
655 | bool level = irq_level->level; | |
656 | ||
657 | irq_type = (irq >> KVM_ARM_IRQ_TYPE_SHIFT) & KVM_ARM_IRQ_TYPE_MASK; | |
658 | vcpu_idx = (irq >> KVM_ARM_IRQ_VCPU_SHIFT) & KVM_ARM_IRQ_VCPU_MASK; | |
659 | irq_num = (irq >> KVM_ARM_IRQ_NUM_SHIFT) & KVM_ARM_IRQ_NUM_MASK; | |
660 | ||
661 | trace_kvm_irq_line(irq_type, vcpu_idx, irq_num, irq_level->level); | |
662 | ||
5863c2ce MZ |
663 | switch (irq_type) { |
664 | case KVM_ARM_IRQ_TYPE_CPU: | |
665 | if (irqchip_in_kernel(kvm)) | |
666 | return -ENXIO; | |
86ce8535 | 667 | |
5863c2ce MZ |
668 | if (vcpu_idx >= nrcpus) |
669 | return -EINVAL; | |
86ce8535 | 670 | |
5863c2ce MZ |
671 | vcpu = kvm_get_vcpu(kvm, vcpu_idx); |
672 | if (!vcpu) | |
673 | return -EINVAL; | |
86ce8535 | 674 | |
5863c2ce MZ |
675 | if (irq_num > KVM_ARM_IRQ_CPU_FIQ) |
676 | return -EINVAL; | |
677 | ||
678 | return vcpu_interrupt_line(vcpu, irq_num, level); | |
679 | case KVM_ARM_IRQ_TYPE_PPI: | |
680 | if (!irqchip_in_kernel(kvm)) | |
681 | return -ENXIO; | |
682 | ||
683 | if (vcpu_idx >= nrcpus) | |
684 | return -EINVAL; | |
685 | ||
686 | vcpu = kvm_get_vcpu(kvm, vcpu_idx); | |
687 | if (!vcpu) | |
688 | return -EINVAL; | |
689 | ||
690 | if (irq_num < VGIC_NR_SGIS || irq_num >= VGIC_NR_PRIVATE_IRQS) | |
691 | return -EINVAL; | |
86ce8535 | 692 | |
5863c2ce MZ |
693 | return kvm_vgic_inject_irq(kvm, vcpu->vcpu_id, irq_num, level); |
694 | case KVM_ARM_IRQ_TYPE_SPI: | |
695 | if (!irqchip_in_kernel(kvm)) | |
696 | return -ENXIO; | |
697 | ||
fd1d0ddf | 698 | if (irq_num < VGIC_NR_PRIVATE_IRQS) |
5863c2ce MZ |
699 | return -EINVAL; |
700 | ||
701 | return kvm_vgic_inject_irq(kvm, 0, irq_num, level); | |
702 | } | |
703 | ||
704 | return -EINVAL; | |
86ce8535 CD |
705 | } |
706 | ||
f7fa034d CD |
707 | static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, |
708 | const struct kvm_vcpu_init *init) | |
709 | { | |
710 | unsigned int i; | |
711 | int phys_target = kvm_target_cpu(); | |
712 | ||
713 | if (init->target != phys_target) | |
714 | return -EINVAL; | |
715 | ||
716 | /* | |
717 | * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must | |
718 | * use the same target. | |
719 | */ | |
720 | if (vcpu->arch.target != -1 && vcpu->arch.target != init->target) | |
721 | return -EINVAL; | |
722 | ||
723 | /* -ENOENT for unknown features, -EINVAL for invalid combinations. */ | |
724 | for (i = 0; i < sizeof(init->features) * 8; i++) { | |
725 | bool set = (init->features[i / 32] & (1 << (i % 32))); | |
726 | ||
727 | if (set && i >= KVM_VCPU_MAX_FEATURES) | |
728 | return -ENOENT; | |
729 | ||
730 | /* | |
731 | * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must | |
732 | * use the same feature set. | |
733 | */ | |
734 | if (vcpu->arch.target != -1 && i < KVM_VCPU_MAX_FEATURES && | |
735 | test_bit(i, vcpu->arch.features) != set) | |
736 | return -EINVAL; | |
737 | ||
738 | if (set) | |
739 | set_bit(i, vcpu->arch.features); | |
740 | } | |
741 | ||
742 | vcpu->arch.target = phys_target; | |
743 | ||
744 | /* Now we know what it is, we can reset it. */ | |
745 | return kvm_reset_vcpu(vcpu); | |
746 | } | |
747 | ||
748 | ||
478a8237 CD |
749 | static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu, |
750 | struct kvm_vcpu_init *init) | |
751 | { | |
752 | int ret; | |
753 | ||
754 | ret = kvm_vcpu_set_target(vcpu, init); | |
755 | if (ret) | |
756 | return ret; | |
757 | ||
957db105 CD |
758 | /* |
759 | * Ensure a rebooted VM will fault in RAM pages and detect if the | |
760 | * guest MMU is turned off and flush the caches as needed. | |
761 | */ | |
762 | if (vcpu->arch.has_run_once) | |
763 | stage2_unmap_vm(vcpu->kvm); | |
764 | ||
b856a591 CD |
765 | vcpu_reset_hcr(vcpu); |
766 | ||
478a8237 CD |
767 | /* |
768 | * Handle the "start in power-off" case by marking the VCPU as paused. | |
769 | */ | |
03f1d4c1 | 770 | if (test_bit(KVM_ARM_VCPU_POWER_OFF, vcpu->arch.features)) |
478a8237 | 771 | vcpu->arch.pause = true; |
3ad8b3de CD |
772 | else |
773 | vcpu->arch.pause = false; | |
478a8237 CD |
774 | |
775 | return 0; | |
776 | } | |
777 | ||
749cf76c CD |
778 | long kvm_arch_vcpu_ioctl(struct file *filp, |
779 | unsigned int ioctl, unsigned long arg) | |
780 | { | |
781 | struct kvm_vcpu *vcpu = filp->private_data; | |
782 | void __user *argp = (void __user *)arg; | |
783 | ||
784 | switch (ioctl) { | |
785 | case KVM_ARM_VCPU_INIT: { | |
786 | struct kvm_vcpu_init init; | |
787 | ||
788 | if (copy_from_user(&init, argp, sizeof(init))) | |
789 | return -EFAULT; | |
790 | ||
478a8237 | 791 | return kvm_arch_vcpu_ioctl_vcpu_init(vcpu, &init); |
749cf76c CD |
792 | } |
793 | case KVM_SET_ONE_REG: | |
794 | case KVM_GET_ONE_REG: { | |
795 | struct kvm_one_reg reg; | |
e8180dca AP |
796 | |
797 | if (unlikely(!kvm_vcpu_initialized(vcpu))) | |
798 | return -ENOEXEC; | |
799 | ||
749cf76c CD |
800 | if (copy_from_user(®, argp, sizeof(reg))) |
801 | return -EFAULT; | |
802 | if (ioctl == KVM_SET_ONE_REG) | |
803 | return kvm_arm_set_reg(vcpu, ®); | |
804 | else | |
805 | return kvm_arm_get_reg(vcpu, ®); | |
806 | } | |
807 | case KVM_GET_REG_LIST: { | |
808 | struct kvm_reg_list __user *user_list = argp; | |
809 | struct kvm_reg_list reg_list; | |
810 | unsigned n; | |
811 | ||
e8180dca AP |
812 | if (unlikely(!kvm_vcpu_initialized(vcpu))) |
813 | return -ENOEXEC; | |
814 | ||
749cf76c CD |
815 | if (copy_from_user(®_list, user_list, sizeof(reg_list))) |
816 | return -EFAULT; | |
817 | n = reg_list.n; | |
818 | reg_list.n = kvm_arm_num_regs(vcpu); | |
819 | if (copy_to_user(user_list, ®_list, sizeof(reg_list))) | |
820 | return -EFAULT; | |
821 | if (n < reg_list.n) | |
822 | return -E2BIG; | |
823 | return kvm_arm_copy_reg_indices(vcpu, user_list->reg); | |
824 | } | |
825 | default: | |
826 | return -EINVAL; | |
827 | } | |
828 | } | |
829 | ||
53c810c3 MS |
830 | /** |
831 | * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot | |
832 | * @kvm: kvm instance | |
833 | * @log: slot id and address to which we copy the log | |
834 | * | |
835 | * Steps 1-4 below provide general overview of dirty page logging. See | |
836 | * kvm_get_dirty_log_protect() function description for additional details. | |
837 | * | |
838 | * We call kvm_get_dirty_log_protect() to handle steps 1-3, upon return we | |
839 | * always flush the TLB (step 4) even if previous step failed and the dirty | |
840 | * bitmap may be corrupt. Regardless of previous outcome the KVM logging API | |
841 | * does not preclude user space subsequent dirty log read. Flushing TLB ensures | |
842 | * writes will be marked dirty for next log read. | |
843 | * | |
844 | * 1. Take a snapshot of the bit and clear it if needed. | |
845 | * 2. Write protect the corresponding page. | |
846 | * 3. Copy the snapshot to the userspace. | |
847 | * 4. Flush TLB's if needed. | |
848 | */ | |
749cf76c CD |
849 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
850 | { | |
53c810c3 MS |
851 | bool is_dirty = false; |
852 | int r; | |
853 | ||
854 | mutex_lock(&kvm->slots_lock); | |
855 | ||
856 | r = kvm_get_dirty_log_protect(kvm, log, &is_dirty); | |
857 | ||
858 | if (is_dirty) | |
859 | kvm_flush_remote_tlbs(kvm); | |
860 | ||
861 | mutex_unlock(&kvm->slots_lock); | |
862 | return r; | |
749cf76c CD |
863 | } |
864 | ||
3401d546 CD |
865 | static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm, |
866 | struct kvm_arm_device_addr *dev_addr) | |
867 | { | |
330690cd CD |
868 | unsigned long dev_id, type; |
869 | ||
870 | dev_id = (dev_addr->id & KVM_ARM_DEVICE_ID_MASK) >> | |
871 | KVM_ARM_DEVICE_ID_SHIFT; | |
872 | type = (dev_addr->id & KVM_ARM_DEVICE_TYPE_MASK) >> | |
873 | KVM_ARM_DEVICE_TYPE_SHIFT; | |
874 | ||
875 | switch (dev_id) { | |
876 | case KVM_ARM_DEVICE_VGIC_V2: | |
ce01e4e8 | 877 | return kvm_vgic_addr(kvm, type, &dev_addr->addr, true); |
330690cd CD |
878 | default: |
879 | return -ENODEV; | |
880 | } | |
3401d546 CD |
881 | } |
882 | ||
749cf76c CD |
883 | long kvm_arch_vm_ioctl(struct file *filp, |
884 | unsigned int ioctl, unsigned long arg) | |
885 | { | |
3401d546 CD |
886 | struct kvm *kvm = filp->private_data; |
887 | void __user *argp = (void __user *)arg; | |
888 | ||
889 | switch (ioctl) { | |
5863c2ce | 890 | case KVM_CREATE_IRQCHIP: { |
69ff5c61 | 891 | return kvm_vgic_create(kvm, KVM_DEV_TYPE_ARM_VGIC_V2); |
5863c2ce | 892 | } |
3401d546 CD |
893 | case KVM_ARM_SET_DEVICE_ADDR: { |
894 | struct kvm_arm_device_addr dev_addr; | |
895 | ||
896 | if (copy_from_user(&dev_addr, argp, sizeof(dev_addr))) | |
897 | return -EFAULT; | |
898 | return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr); | |
899 | } | |
42c4e0c7 AP |
900 | case KVM_ARM_PREFERRED_TARGET: { |
901 | int err; | |
902 | struct kvm_vcpu_init init; | |
903 | ||
904 | err = kvm_vcpu_preferred_target(&init); | |
905 | if (err) | |
906 | return err; | |
907 | ||
908 | if (copy_to_user(argp, &init, sizeof(init))) | |
909 | return -EFAULT; | |
910 | ||
911 | return 0; | |
912 | } | |
3401d546 CD |
913 | default: |
914 | return -EINVAL; | |
915 | } | |
749cf76c CD |
916 | } |
917 | ||
d157f4a5 | 918 | static void cpu_init_hyp_mode(void *dummy) |
342cd0ab | 919 | { |
dac288f7 MZ |
920 | phys_addr_t boot_pgd_ptr; |
921 | phys_addr_t pgd_ptr; | |
342cd0ab CD |
922 | unsigned long hyp_stack_ptr; |
923 | unsigned long stack_page; | |
924 | unsigned long vector_ptr; | |
925 | ||
926 | /* Switch from the HYP stub to our own HYP init vector */ | |
5a677ce0 | 927 | __hyp_set_vectors(kvm_get_idmap_vector()); |
342cd0ab | 928 | |
dac288f7 MZ |
929 | boot_pgd_ptr = kvm_mmu_get_boot_httbr(); |
930 | pgd_ptr = kvm_mmu_get_httbr(); | |
1436c1aa | 931 | stack_page = __this_cpu_read(kvm_arm_hyp_stack_page); |
342cd0ab CD |
932 | hyp_stack_ptr = stack_page + PAGE_SIZE; |
933 | vector_ptr = (unsigned long)__kvm_hyp_vector; | |
934 | ||
5a677ce0 | 935 | __cpu_init_hyp_mode(boot_pgd_ptr, pgd_ptr, hyp_stack_ptr, vector_ptr); |
56c7f5e7 AB |
936 | |
937 | kvm_arm_init_debug(); | |
342cd0ab CD |
938 | } |
939 | ||
d157f4a5 MZ |
940 | static int hyp_init_cpu_notify(struct notifier_block *self, |
941 | unsigned long action, void *cpu) | |
942 | { | |
943 | switch (action) { | |
944 | case CPU_STARTING: | |
945 | case CPU_STARTING_FROZEN: | |
37a34ac1 VM |
946 | if (__hyp_get_vectors() == hyp_default_vectors) |
947 | cpu_init_hyp_mode(NULL); | |
d157f4a5 MZ |
948 | break; |
949 | } | |
950 | ||
951 | return NOTIFY_OK; | |
342cd0ab CD |
952 | } |
953 | ||
d157f4a5 MZ |
954 | static struct notifier_block hyp_init_cpu_nb = { |
955 | .notifier_call = hyp_init_cpu_notify, | |
956 | }; | |
957 | ||
1fcf7ce0 LP |
958 | #ifdef CONFIG_CPU_PM |
959 | static int hyp_init_cpu_pm_notifier(struct notifier_block *self, | |
960 | unsigned long cmd, | |
961 | void *v) | |
962 | { | |
b20c9f29 MZ |
963 | if (cmd == CPU_PM_EXIT && |
964 | __hyp_get_vectors() == hyp_default_vectors) { | |
1fcf7ce0 LP |
965 | cpu_init_hyp_mode(NULL); |
966 | return NOTIFY_OK; | |
967 | } | |
968 | ||
969 | return NOTIFY_DONE; | |
970 | } | |
971 | ||
972 | static struct notifier_block hyp_init_cpu_pm_nb = { | |
973 | .notifier_call = hyp_init_cpu_pm_notifier, | |
974 | }; | |
975 | ||
976 | static void __init hyp_cpu_pm_init(void) | |
977 | { | |
978 | cpu_pm_register_notifier(&hyp_init_cpu_pm_nb); | |
979 | } | |
980 | #else | |
981 | static inline void hyp_cpu_pm_init(void) | |
982 | { | |
983 | } | |
984 | #endif | |
985 | ||
342cd0ab CD |
986 | /** |
987 | * Inits Hyp-mode on all online CPUs | |
988 | */ | |
989 | static int init_hyp_mode(void) | |
990 | { | |
342cd0ab CD |
991 | int cpu; |
992 | int err = 0; | |
993 | ||
994 | /* | |
995 | * Allocate Hyp PGD and setup Hyp identity mapping | |
996 | */ | |
997 | err = kvm_mmu_init(); | |
998 | if (err) | |
999 | goto out_err; | |
1000 | ||
1001 | /* | |
1002 | * It is probably enough to obtain the default on one | |
1003 | * CPU. It's unlikely to be different on the others. | |
1004 | */ | |
1005 | hyp_default_vectors = __hyp_get_vectors(); | |
1006 | ||
1007 | /* | |
1008 | * Allocate stack pages for Hypervisor-mode | |
1009 | */ | |
1010 | for_each_possible_cpu(cpu) { | |
1011 | unsigned long stack_page; | |
1012 | ||
1013 | stack_page = __get_free_page(GFP_KERNEL); | |
1014 | if (!stack_page) { | |
1015 | err = -ENOMEM; | |
1016 | goto out_free_stack_pages; | |
1017 | } | |
1018 | ||
1019 | per_cpu(kvm_arm_hyp_stack_page, cpu) = stack_page; | |
1020 | } | |
1021 | ||
342cd0ab CD |
1022 | /* |
1023 | * Map the Hyp-code called directly from the host | |
1024 | */ | |
1025 | err = create_hyp_mappings(__kvm_hyp_code_start, __kvm_hyp_code_end); | |
1026 | if (err) { | |
1027 | kvm_err("Cannot map world-switch code\n"); | |
1028 | goto out_free_mappings; | |
1029 | } | |
1030 | ||
1031 | /* | |
1032 | * Map the Hyp stack pages | |
1033 | */ | |
1034 | for_each_possible_cpu(cpu) { | |
1035 | char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu); | |
1036 | err = create_hyp_mappings(stack_page, stack_page + PAGE_SIZE); | |
1037 | ||
1038 | if (err) { | |
1039 | kvm_err("Cannot map hyp stack\n"); | |
1040 | goto out_free_mappings; | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | /* | |
3de50da6 | 1045 | * Map the host CPU structures |
342cd0ab | 1046 | */ |
3de50da6 MZ |
1047 | kvm_host_cpu_state = alloc_percpu(kvm_cpu_context_t); |
1048 | if (!kvm_host_cpu_state) { | |
342cd0ab | 1049 | err = -ENOMEM; |
3de50da6 | 1050 | kvm_err("Cannot allocate host CPU state\n"); |
342cd0ab CD |
1051 | goto out_free_mappings; |
1052 | } | |
1053 | ||
1054 | for_each_possible_cpu(cpu) { | |
3de50da6 | 1055 | kvm_cpu_context_t *cpu_ctxt; |
342cd0ab | 1056 | |
3de50da6 MZ |
1057 | cpu_ctxt = per_cpu_ptr(kvm_host_cpu_state, cpu); |
1058 | err = create_hyp_mappings(cpu_ctxt, cpu_ctxt + 1); | |
342cd0ab CD |
1059 | |
1060 | if (err) { | |
3de50da6 MZ |
1061 | kvm_err("Cannot map host CPU state: %d\n", err); |
1062 | goto out_free_context; | |
342cd0ab CD |
1063 | } |
1064 | } | |
1065 | ||
d157f4a5 MZ |
1066 | /* |
1067 | * Execute the init code on each CPU. | |
1068 | */ | |
1069 | on_each_cpu(cpu_init_hyp_mode, NULL, 1); | |
1070 | ||
1a89dd91 MZ |
1071 | /* |
1072 | * Init HYP view of VGIC | |
1073 | */ | |
1074 | err = kvm_vgic_hyp_init(); | |
1075 | if (err) | |
3de50da6 | 1076 | goto out_free_context; |
1a89dd91 | 1077 | |
967f8427 MZ |
1078 | /* |
1079 | * Init HYP architected timer support | |
1080 | */ | |
1081 | err = kvm_timer_hyp_init(); | |
1082 | if (err) | |
399ea0f6 | 1083 | goto out_free_context; |
967f8427 | 1084 | |
d157f4a5 MZ |
1085 | #ifndef CONFIG_HOTPLUG_CPU |
1086 | free_boot_hyp_pgd(); | |
1087 | #endif | |
1088 | ||
210552c1 MZ |
1089 | kvm_perf_init(); |
1090 | ||
342cd0ab | 1091 | kvm_info("Hyp mode initialized successfully\n"); |
210552c1 | 1092 | |
342cd0ab | 1093 | return 0; |
3de50da6 MZ |
1094 | out_free_context: |
1095 | free_percpu(kvm_host_cpu_state); | |
342cd0ab | 1096 | out_free_mappings: |
4f728276 | 1097 | free_hyp_pgds(); |
342cd0ab CD |
1098 | out_free_stack_pages: |
1099 | for_each_possible_cpu(cpu) | |
1100 | free_page(per_cpu(kvm_arm_hyp_stack_page, cpu)); | |
1101 | out_err: | |
1102 | kvm_err("error initializing Hyp mode: %d\n", err); | |
1103 | return err; | |
1104 | } | |
1105 | ||
d4e071ce AP |
1106 | static void check_kvm_target_cpu(void *ret) |
1107 | { | |
1108 | *(int *)ret = kvm_target_cpu(); | |
1109 | } | |
1110 | ||
4429fc64 AP |
1111 | struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr) |
1112 | { | |
1113 | struct kvm_vcpu *vcpu; | |
1114 | int i; | |
1115 | ||
1116 | mpidr &= MPIDR_HWID_BITMASK; | |
1117 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1118 | if (mpidr == kvm_vcpu_get_mpidr_aff(vcpu)) | |
1119 | return vcpu; | |
1120 | } | |
1121 | return NULL; | |
1122 | } | |
1123 | ||
342cd0ab CD |
1124 | /** |
1125 | * Initialize Hyp-mode and memory mappings on all CPUs. | |
1126 | */ | |
749cf76c CD |
1127 | int kvm_arch_init(void *opaque) |
1128 | { | |
342cd0ab | 1129 | int err; |
d4e071ce | 1130 | int ret, cpu; |
342cd0ab CD |
1131 | |
1132 | if (!is_hyp_mode_available()) { | |
1133 | kvm_err("HYP mode not available\n"); | |
1134 | return -ENODEV; | |
1135 | } | |
1136 | ||
d4e071ce AP |
1137 | for_each_online_cpu(cpu) { |
1138 | smp_call_function_single(cpu, check_kvm_target_cpu, &ret, 1); | |
1139 | if (ret < 0) { | |
1140 | kvm_err("Error, CPU %d not supported!\n", cpu); | |
1141 | return -ENODEV; | |
1142 | } | |
342cd0ab CD |
1143 | } |
1144 | ||
8146875d SB |
1145 | cpu_notifier_register_begin(); |
1146 | ||
342cd0ab CD |
1147 | err = init_hyp_mode(); |
1148 | if (err) | |
1149 | goto out_err; | |
1150 | ||
8146875d | 1151 | err = __register_cpu_notifier(&hyp_init_cpu_nb); |
d157f4a5 MZ |
1152 | if (err) { |
1153 | kvm_err("Cannot register HYP init CPU notifier (%d)\n", err); | |
1154 | goto out_err; | |
1155 | } | |
1156 | ||
8146875d SB |
1157 | cpu_notifier_register_done(); |
1158 | ||
1fcf7ce0 LP |
1159 | hyp_cpu_pm_init(); |
1160 | ||
5b3e5e5b | 1161 | kvm_coproc_table_init(); |
749cf76c | 1162 | return 0; |
342cd0ab | 1163 | out_err: |
8146875d | 1164 | cpu_notifier_register_done(); |
342cd0ab | 1165 | return err; |
749cf76c CD |
1166 | } |
1167 | ||
1168 | /* NOP: Compiling as a module not supported */ | |
1169 | void kvm_arch_exit(void) | |
1170 | { | |
210552c1 | 1171 | kvm_perf_teardown(); |
749cf76c CD |
1172 | } |
1173 | ||
1174 | static int arm_init(void) | |
1175 | { | |
1176 | int rc = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); | |
1177 | return rc; | |
1178 | } | |
1179 | ||
1180 | module_init(arm_init); |