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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 | ||
3caa2d8c AP |
135 | /* The maximum number of VCPUs is limited by the host's GIC model */ |
136 | kvm->arch.max_vcpus = kvm_vgic_get_max_vcpus(); | |
137 | ||
d5d8184d CD |
138 | return ret; |
139 | out_free_stage2_pgd: | |
140 | kvm_free_stage2_pgd(kvm); | |
141 | out_fail_alloc: | |
142 | return ret; | |
749cf76c CD |
143 | } |
144 | ||
145 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) | |
146 | { | |
147 | return VM_FAULT_SIGBUS; | |
148 | } | |
149 | ||
749cf76c | 150 | |
d5d8184d CD |
151 | /** |
152 | * kvm_arch_destroy_vm - destroy the VM data structure | |
153 | * @kvm: pointer to the KVM struct | |
154 | */ | |
749cf76c CD |
155 | void kvm_arch_destroy_vm(struct kvm *kvm) |
156 | { | |
157 | int i; | |
158 | ||
d5d8184d CD |
159 | kvm_free_stage2_pgd(kvm); |
160 | ||
749cf76c CD |
161 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
162 | if (kvm->vcpus[i]) { | |
163 | kvm_arch_vcpu_free(kvm->vcpus[i]); | |
164 | kvm->vcpus[i] = NULL; | |
165 | } | |
166 | } | |
c1bfb577 MZ |
167 | |
168 | kvm_vgic_destroy(kvm); | |
749cf76c CD |
169 | } |
170 | ||
784aa3d7 | 171 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
749cf76c CD |
172 | { |
173 | int r; | |
174 | switch (ext) { | |
1a89dd91 MZ |
175 | case KVM_CAP_IRQCHIP: |
176 | r = vgic_present; | |
177 | break; | |
7330672b | 178 | case KVM_CAP_DEVICE_CTRL: |
749cf76c CD |
179 | case KVM_CAP_USER_MEMORY: |
180 | case KVM_CAP_SYNC_MMU: | |
181 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: | |
182 | case KVM_CAP_ONE_REG: | |
aa024c2f | 183 | case KVM_CAP_ARM_PSCI: |
4447a208 | 184 | case KVM_CAP_ARM_PSCI_0_2: |
98047888 | 185 | case KVM_CAP_READONLY_MEM: |
749cf76c CD |
186 | r = 1; |
187 | break; | |
188 | case KVM_CAP_COALESCED_MMIO: | |
189 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
190 | break; | |
3401d546 CD |
191 | case KVM_CAP_ARM_SET_DEVICE_ADDR: |
192 | r = 1; | |
ca46e10f | 193 | break; |
749cf76c CD |
194 | case KVM_CAP_NR_VCPUS: |
195 | r = num_online_cpus(); | |
196 | break; | |
197 | case KVM_CAP_MAX_VCPUS: | |
198 | r = KVM_MAX_VCPUS; | |
199 | break; | |
200 | default: | |
17b1e31f | 201 | r = kvm_arch_dev_ioctl_check_extension(ext); |
749cf76c CD |
202 | break; |
203 | } | |
204 | return r; | |
205 | } | |
206 | ||
207 | long kvm_arch_dev_ioctl(struct file *filp, | |
208 | unsigned int ioctl, unsigned long arg) | |
209 | { | |
210 | return -EINVAL; | |
211 | } | |
212 | ||
749cf76c CD |
213 | |
214 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) | |
215 | { | |
216 | int err; | |
217 | struct kvm_vcpu *vcpu; | |
218 | ||
716139df CD |
219 | if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) { |
220 | err = -EBUSY; | |
221 | goto out; | |
222 | } | |
223 | ||
3caa2d8c AP |
224 | if (id >= kvm->arch.max_vcpus) { |
225 | err = -EINVAL; | |
226 | goto out; | |
227 | } | |
228 | ||
749cf76c CD |
229 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
230 | if (!vcpu) { | |
231 | err = -ENOMEM; | |
232 | goto out; | |
233 | } | |
234 | ||
235 | err = kvm_vcpu_init(vcpu, kvm, id); | |
236 | if (err) | |
237 | goto free_vcpu; | |
238 | ||
d5d8184d CD |
239 | err = create_hyp_mappings(vcpu, vcpu + 1); |
240 | if (err) | |
241 | goto vcpu_uninit; | |
242 | ||
749cf76c | 243 | return vcpu; |
d5d8184d CD |
244 | vcpu_uninit: |
245 | kvm_vcpu_uninit(vcpu); | |
749cf76c CD |
246 | free_vcpu: |
247 | kmem_cache_free(kvm_vcpu_cache, vcpu); | |
248 | out: | |
249 | return ERR_PTR(err); | |
250 | } | |
251 | ||
31928aa5 | 252 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
749cf76c | 253 | { |
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 | { | |
271 | return 0; | |
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 | ||
749cf76c CD |
283 | return 0; |
284 | } | |
285 | ||
749cf76c CD |
286 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
287 | { | |
86ce8535 | 288 | vcpu->cpu = cpu; |
3de50da6 | 289 | vcpu->arch.host_cpu_context = this_cpu_ptr(kvm_host_cpu_state); |
5b3e5e5b CD |
290 | |
291 | /* | |
292 | * Check whether this vcpu requires the cache to be flushed on | |
293 | * this physical CPU. This is a consequence of doing dcache | |
294 | * operations by set/way on this vcpu. We do it here to be in | |
295 | * a non-preemptible section. | |
296 | */ | |
297 | if (cpumask_test_and_clear_cpu(cpu, &vcpu->arch.require_dcache_flush)) | |
298 | flush_cache_all(); /* We'd really want v7_flush_dcache_all() */ | |
1638a12d MZ |
299 | |
300 | kvm_arm_set_running_vcpu(vcpu); | |
749cf76c CD |
301 | } |
302 | ||
303 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
304 | { | |
e9b152cb CD |
305 | /* |
306 | * The arch-generic KVM code expects the cpu field of a vcpu to be -1 | |
307 | * if the vcpu is no longer assigned to a cpu. This is used for the | |
308 | * optimized make_all_cpus_request path. | |
309 | */ | |
310 | vcpu->cpu = -1; | |
311 | ||
1638a12d | 312 | kvm_arm_set_running_vcpu(NULL); |
749cf76c CD |
313 | } |
314 | ||
315 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, | |
316 | struct kvm_guest_debug *dbg) | |
317 | { | |
318 | return -EINVAL; | |
319 | } | |
320 | ||
321 | ||
322 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, | |
323 | struct kvm_mp_state *mp_state) | |
324 | { | |
325 | return -EINVAL; | |
326 | } | |
327 | ||
328 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
329 | struct kvm_mp_state *mp_state) | |
330 | { | |
331 | return -EINVAL; | |
332 | } | |
333 | ||
5b3e5e5b CD |
334 | /** |
335 | * kvm_arch_vcpu_runnable - determine if the vcpu can be scheduled | |
336 | * @v: The VCPU pointer | |
337 | * | |
338 | * If the guest CPU is not waiting for interrupts or an interrupt line is | |
339 | * asserted, the CPU is by definition runnable. | |
340 | */ | |
749cf76c CD |
341 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) |
342 | { | |
1a89dd91 | 343 | return !!v->arch.irq_lines || kvm_vgic_vcpu_pending_irq(v); |
749cf76c CD |
344 | } |
345 | ||
f7ed45be CD |
346 | /* Just ensure a guest exit from a particular CPU */ |
347 | static void exit_vm_noop(void *info) | |
348 | { | |
349 | } | |
350 | ||
351 | void force_vm_exit(const cpumask_t *mask) | |
352 | { | |
353 | smp_call_function_many(mask, exit_vm_noop, NULL, true); | |
354 | } | |
355 | ||
356 | /** | |
357 | * need_new_vmid_gen - check that the VMID is still valid | |
358 | * @kvm: The VM's VMID to checkt | |
359 | * | |
360 | * return true if there is a new generation of VMIDs being used | |
361 | * | |
362 | * The hardware supports only 256 values with the value zero reserved for the | |
363 | * host, so we check if an assigned value belongs to a previous generation, | |
364 | * which which requires us to assign a new value. If we're the first to use a | |
365 | * VMID for the new generation, we must flush necessary caches and TLBs on all | |
366 | * CPUs. | |
367 | */ | |
368 | static bool need_new_vmid_gen(struct kvm *kvm) | |
369 | { | |
370 | return unlikely(kvm->arch.vmid_gen != atomic64_read(&kvm_vmid_gen)); | |
371 | } | |
372 | ||
373 | /** | |
374 | * update_vttbr - Update the VTTBR with a valid VMID before the guest runs | |
375 | * @kvm The guest that we are about to run | |
376 | * | |
377 | * Called from kvm_arch_vcpu_ioctl_run before entering the guest to ensure the | |
378 | * VM has a valid VMID, otherwise assigns a new one and flushes corresponding | |
379 | * caches and TLBs. | |
380 | */ | |
381 | static void update_vttbr(struct kvm *kvm) | |
382 | { | |
383 | phys_addr_t pgd_phys; | |
384 | u64 vmid; | |
385 | ||
386 | if (!need_new_vmid_gen(kvm)) | |
387 | return; | |
388 | ||
389 | spin_lock(&kvm_vmid_lock); | |
390 | ||
391 | /* | |
392 | * We need to re-check the vmid_gen here to ensure that if another vcpu | |
393 | * already allocated a valid vmid for this vm, then this vcpu should | |
394 | * use the same vmid. | |
395 | */ | |
396 | if (!need_new_vmid_gen(kvm)) { | |
397 | spin_unlock(&kvm_vmid_lock); | |
398 | return; | |
399 | } | |
400 | ||
401 | /* First user of a new VMID generation? */ | |
402 | if (unlikely(kvm_next_vmid == 0)) { | |
403 | atomic64_inc(&kvm_vmid_gen); | |
404 | kvm_next_vmid = 1; | |
405 | ||
406 | /* | |
407 | * On SMP we know no other CPUs can use this CPU's or each | |
408 | * other's VMID after force_vm_exit returns since the | |
409 | * kvm_vmid_lock blocks them from reentry to the guest. | |
410 | */ | |
411 | force_vm_exit(cpu_all_mask); | |
412 | /* | |
413 | * Now broadcast TLB + ICACHE invalidation over the inner | |
414 | * shareable domain to make sure all data structures are | |
415 | * clean. | |
416 | */ | |
417 | kvm_call_hyp(__kvm_flush_vm_context); | |
418 | } | |
419 | ||
420 | kvm->arch.vmid_gen = atomic64_read(&kvm_vmid_gen); | |
421 | kvm->arch.vmid = kvm_next_vmid; | |
422 | kvm_next_vmid++; | |
423 | ||
424 | /* update vttbr to be used with the new vmid */ | |
38f791a4 | 425 | pgd_phys = virt_to_phys(kvm_get_hwpgd(kvm)); |
dbff124e | 426 | BUG_ON(pgd_phys & ~VTTBR_BADDR_MASK); |
f7ed45be | 427 | vmid = ((u64)(kvm->arch.vmid) << VTTBR_VMID_SHIFT) & VTTBR_VMID_MASK; |
dbff124e | 428 | kvm->arch.vttbr = pgd_phys | vmid; |
f7ed45be CD |
429 | |
430 | spin_unlock(&kvm_vmid_lock); | |
431 | } | |
432 | ||
f7ed45be CD |
433 | static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu) |
434 | { | |
05971120 | 435 | struct kvm *kvm = vcpu->kvm; |
e1ba0207 CD |
436 | int ret; |
437 | ||
f7ed45be CD |
438 | if (likely(vcpu->arch.has_run_once)) |
439 | return 0; | |
440 | ||
441 | vcpu->arch.has_run_once = true; | |
aa024c2f | 442 | |
01ac5e34 | 443 | /* |
6d3cfbe2 PM |
444 | * Map the VGIC hardware resources before running a vcpu the first |
445 | * time on this VM. | |
01ac5e34 | 446 | */ |
05971120 CD |
447 | if (unlikely(!vgic_ready(kvm))) { |
448 | ret = kvm_vgic_map_resources(kvm); | |
01ac5e34 MZ |
449 | if (ret) |
450 | return ret; | |
451 | } | |
452 | ||
05971120 CD |
453 | /* |
454 | * Enable the arch timers only if we have an in-kernel VGIC | |
455 | * and it has been properly initialized, since we cannot handle | |
456 | * interrupts from the virtual timer with a userspace gic. | |
457 | */ | |
458 | if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) | |
459 | kvm_timer_enable(kvm); | |
460 | ||
f7ed45be CD |
461 | return 0; |
462 | } | |
463 | ||
aa024c2f MZ |
464 | static void vcpu_pause(struct kvm_vcpu *vcpu) |
465 | { | |
466 | wait_queue_head_t *wq = kvm_arch_vcpu_wq(vcpu); | |
467 | ||
468 | wait_event_interruptible(*wq, !vcpu->arch.pause); | |
469 | } | |
470 | ||
e8180dca AP |
471 | static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu) |
472 | { | |
473 | return vcpu->arch.target >= 0; | |
474 | } | |
475 | ||
f7ed45be CD |
476 | /** |
477 | * kvm_arch_vcpu_ioctl_run - the main VCPU run function to execute guest code | |
478 | * @vcpu: The VCPU pointer | |
479 | * @run: The kvm_run structure pointer used for userspace state exchange | |
480 | * | |
481 | * This function is called through the VCPU_RUN ioctl called from user space. It | |
482 | * will execute VM code in a loop until the time slice for the process is used | |
483 | * or some emulation is needed from user space in which case the function will | |
484 | * return with return value 0 and with the kvm_run structure filled in with the | |
485 | * required data for the requested emulation. | |
486 | */ | |
749cf76c CD |
487 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) |
488 | { | |
f7ed45be CD |
489 | int ret; |
490 | sigset_t sigsaved; | |
491 | ||
e8180dca | 492 | if (unlikely(!kvm_vcpu_initialized(vcpu))) |
f7ed45be CD |
493 | return -ENOEXEC; |
494 | ||
495 | ret = kvm_vcpu_first_run_init(vcpu); | |
496 | if (ret) | |
497 | return ret; | |
498 | ||
45e96ea6 CD |
499 | if (run->exit_reason == KVM_EXIT_MMIO) { |
500 | ret = kvm_handle_mmio_return(vcpu, vcpu->run); | |
501 | if (ret) | |
502 | return ret; | |
503 | } | |
504 | ||
f7ed45be CD |
505 | if (vcpu->sigset_active) |
506 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
507 | ||
508 | ret = 1; | |
509 | run->exit_reason = KVM_EXIT_UNKNOWN; | |
510 | while (ret > 0) { | |
511 | /* | |
512 | * Check conditions before entering the guest | |
513 | */ | |
514 | cond_resched(); | |
515 | ||
516 | update_vttbr(vcpu->kvm); | |
517 | ||
aa024c2f MZ |
518 | if (vcpu->arch.pause) |
519 | vcpu_pause(vcpu); | |
520 | ||
1a89dd91 | 521 | kvm_vgic_flush_hwstate(vcpu); |
c7e3ba64 | 522 | kvm_timer_flush_hwstate(vcpu); |
1a89dd91 | 523 | |
f7ed45be CD |
524 | local_irq_disable(); |
525 | ||
526 | /* | |
527 | * Re-check atomic conditions | |
528 | */ | |
529 | if (signal_pending(current)) { | |
530 | ret = -EINTR; | |
531 | run->exit_reason = KVM_EXIT_INTR; | |
532 | } | |
533 | ||
534 | if (ret <= 0 || need_new_vmid_gen(vcpu->kvm)) { | |
535 | local_irq_enable(); | |
c7e3ba64 | 536 | kvm_timer_sync_hwstate(vcpu); |
1a89dd91 | 537 | kvm_vgic_sync_hwstate(vcpu); |
f7ed45be CD |
538 | continue; |
539 | } | |
540 | ||
541 | /************************************************************** | |
542 | * Enter the guest | |
543 | */ | |
544 | trace_kvm_entry(*vcpu_pc(vcpu)); | |
545 | kvm_guest_enter(); | |
546 | vcpu->mode = IN_GUEST_MODE; | |
547 | ||
548 | ret = kvm_call_hyp(__kvm_vcpu_run, vcpu); | |
549 | ||
550 | vcpu->mode = OUTSIDE_GUEST_MODE; | |
5b3e5e5b | 551 | vcpu->arch.last_pcpu = smp_processor_id(); |
f7ed45be CD |
552 | kvm_guest_exit(); |
553 | trace_kvm_exit(*vcpu_pc(vcpu)); | |
554 | /* | |
555 | * We may have taken a host interrupt in HYP mode (ie | |
556 | * while executing the guest). This interrupt is still | |
557 | * pending, as we haven't serviced it yet! | |
558 | * | |
559 | * We're now back in SVC mode, with interrupts | |
560 | * disabled. Enabling the interrupts now will have | |
561 | * the effect of taking the interrupt again, in SVC | |
562 | * mode this time. | |
563 | */ | |
564 | local_irq_enable(); | |
565 | ||
566 | /* | |
567 | * Back from guest | |
568 | *************************************************************/ | |
569 | ||
c7e3ba64 | 570 | kvm_timer_sync_hwstate(vcpu); |
1a89dd91 MZ |
571 | kvm_vgic_sync_hwstate(vcpu); |
572 | ||
f7ed45be CD |
573 | ret = handle_exit(vcpu, run, ret); |
574 | } | |
575 | ||
576 | if (vcpu->sigset_active) | |
577 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
578 | return ret; | |
749cf76c CD |
579 | } |
580 | ||
86ce8535 CD |
581 | static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level) |
582 | { | |
583 | int bit_index; | |
584 | bool set; | |
585 | unsigned long *ptr; | |
586 | ||
587 | if (number == KVM_ARM_IRQ_CPU_IRQ) | |
588 | bit_index = __ffs(HCR_VI); | |
589 | else /* KVM_ARM_IRQ_CPU_FIQ */ | |
590 | bit_index = __ffs(HCR_VF); | |
591 | ||
592 | ptr = (unsigned long *)&vcpu->arch.irq_lines; | |
593 | if (level) | |
594 | set = test_and_set_bit(bit_index, ptr); | |
595 | else | |
596 | set = test_and_clear_bit(bit_index, ptr); | |
597 | ||
598 | /* | |
599 | * If we didn't change anything, no need to wake up or kick other CPUs | |
600 | */ | |
601 | if (set == level) | |
602 | return 0; | |
603 | ||
604 | /* | |
605 | * The vcpu irq_lines field was updated, wake up sleeping VCPUs and | |
606 | * trigger a world-switch round on the running physical CPU to set the | |
607 | * virtual IRQ/FIQ fields in the HCR appropriately. | |
608 | */ | |
609 | kvm_vcpu_kick(vcpu); | |
610 | ||
611 | return 0; | |
612 | } | |
613 | ||
79558f11 AG |
614 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, |
615 | bool line_status) | |
86ce8535 CD |
616 | { |
617 | u32 irq = irq_level->irq; | |
618 | unsigned int irq_type, vcpu_idx, irq_num; | |
619 | int nrcpus = atomic_read(&kvm->online_vcpus); | |
620 | struct kvm_vcpu *vcpu = NULL; | |
621 | bool level = irq_level->level; | |
622 | ||
623 | irq_type = (irq >> KVM_ARM_IRQ_TYPE_SHIFT) & KVM_ARM_IRQ_TYPE_MASK; | |
624 | vcpu_idx = (irq >> KVM_ARM_IRQ_VCPU_SHIFT) & KVM_ARM_IRQ_VCPU_MASK; | |
625 | irq_num = (irq >> KVM_ARM_IRQ_NUM_SHIFT) & KVM_ARM_IRQ_NUM_MASK; | |
626 | ||
627 | trace_kvm_irq_line(irq_type, vcpu_idx, irq_num, irq_level->level); | |
628 | ||
5863c2ce MZ |
629 | switch (irq_type) { |
630 | case KVM_ARM_IRQ_TYPE_CPU: | |
631 | if (irqchip_in_kernel(kvm)) | |
632 | return -ENXIO; | |
86ce8535 | 633 | |
5863c2ce MZ |
634 | if (vcpu_idx >= nrcpus) |
635 | return -EINVAL; | |
86ce8535 | 636 | |
5863c2ce MZ |
637 | vcpu = kvm_get_vcpu(kvm, vcpu_idx); |
638 | if (!vcpu) | |
639 | return -EINVAL; | |
86ce8535 | 640 | |
5863c2ce MZ |
641 | if (irq_num > KVM_ARM_IRQ_CPU_FIQ) |
642 | return -EINVAL; | |
643 | ||
644 | return vcpu_interrupt_line(vcpu, irq_num, level); | |
645 | case KVM_ARM_IRQ_TYPE_PPI: | |
646 | if (!irqchip_in_kernel(kvm)) | |
647 | return -ENXIO; | |
648 | ||
649 | if (vcpu_idx >= nrcpus) | |
650 | return -EINVAL; | |
651 | ||
652 | vcpu = kvm_get_vcpu(kvm, vcpu_idx); | |
653 | if (!vcpu) | |
654 | return -EINVAL; | |
655 | ||
656 | if (irq_num < VGIC_NR_SGIS || irq_num >= VGIC_NR_PRIVATE_IRQS) | |
657 | return -EINVAL; | |
86ce8535 | 658 | |
5863c2ce MZ |
659 | return kvm_vgic_inject_irq(kvm, vcpu->vcpu_id, irq_num, level); |
660 | case KVM_ARM_IRQ_TYPE_SPI: | |
661 | if (!irqchip_in_kernel(kvm)) | |
662 | return -ENXIO; | |
663 | ||
664 | if (irq_num < VGIC_NR_PRIVATE_IRQS || | |
665 | irq_num > KVM_ARM_IRQ_GIC_MAX) | |
666 | return -EINVAL; | |
667 | ||
668 | return kvm_vgic_inject_irq(kvm, 0, irq_num, level); | |
669 | } | |
670 | ||
671 | return -EINVAL; | |
86ce8535 CD |
672 | } |
673 | ||
f7fa034d CD |
674 | static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, |
675 | const struct kvm_vcpu_init *init) | |
676 | { | |
677 | unsigned int i; | |
678 | int phys_target = kvm_target_cpu(); | |
679 | ||
680 | if (init->target != phys_target) | |
681 | return -EINVAL; | |
682 | ||
683 | /* | |
684 | * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must | |
685 | * use the same target. | |
686 | */ | |
687 | if (vcpu->arch.target != -1 && vcpu->arch.target != init->target) | |
688 | return -EINVAL; | |
689 | ||
690 | /* -ENOENT for unknown features, -EINVAL for invalid combinations. */ | |
691 | for (i = 0; i < sizeof(init->features) * 8; i++) { | |
692 | bool set = (init->features[i / 32] & (1 << (i % 32))); | |
693 | ||
694 | if (set && i >= KVM_VCPU_MAX_FEATURES) | |
695 | return -ENOENT; | |
696 | ||
697 | /* | |
698 | * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must | |
699 | * use the same feature set. | |
700 | */ | |
701 | if (vcpu->arch.target != -1 && i < KVM_VCPU_MAX_FEATURES && | |
702 | test_bit(i, vcpu->arch.features) != set) | |
703 | return -EINVAL; | |
704 | ||
705 | if (set) | |
706 | set_bit(i, vcpu->arch.features); | |
707 | } | |
708 | ||
709 | vcpu->arch.target = phys_target; | |
710 | ||
711 | /* Now we know what it is, we can reset it. */ | |
712 | return kvm_reset_vcpu(vcpu); | |
713 | } | |
714 | ||
715 | ||
478a8237 CD |
716 | static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu, |
717 | struct kvm_vcpu_init *init) | |
718 | { | |
719 | int ret; | |
720 | ||
721 | ret = kvm_vcpu_set_target(vcpu, init); | |
722 | if (ret) | |
723 | return ret; | |
724 | ||
957db105 CD |
725 | /* |
726 | * Ensure a rebooted VM will fault in RAM pages and detect if the | |
727 | * guest MMU is turned off and flush the caches as needed. | |
728 | */ | |
729 | if (vcpu->arch.has_run_once) | |
730 | stage2_unmap_vm(vcpu->kvm); | |
731 | ||
b856a591 CD |
732 | vcpu_reset_hcr(vcpu); |
733 | ||
478a8237 CD |
734 | /* |
735 | * Handle the "start in power-off" case by marking the VCPU as paused. | |
736 | */ | |
03f1d4c1 | 737 | if (test_bit(KVM_ARM_VCPU_POWER_OFF, vcpu->arch.features)) |
478a8237 | 738 | vcpu->arch.pause = true; |
3ad8b3de CD |
739 | else |
740 | vcpu->arch.pause = false; | |
478a8237 CD |
741 | |
742 | return 0; | |
743 | } | |
744 | ||
749cf76c CD |
745 | long kvm_arch_vcpu_ioctl(struct file *filp, |
746 | unsigned int ioctl, unsigned long arg) | |
747 | { | |
748 | struct kvm_vcpu *vcpu = filp->private_data; | |
749 | void __user *argp = (void __user *)arg; | |
750 | ||
751 | switch (ioctl) { | |
752 | case KVM_ARM_VCPU_INIT: { | |
753 | struct kvm_vcpu_init init; | |
754 | ||
755 | if (copy_from_user(&init, argp, sizeof(init))) | |
756 | return -EFAULT; | |
757 | ||
478a8237 | 758 | return kvm_arch_vcpu_ioctl_vcpu_init(vcpu, &init); |
749cf76c CD |
759 | } |
760 | case KVM_SET_ONE_REG: | |
761 | case KVM_GET_ONE_REG: { | |
762 | struct kvm_one_reg reg; | |
e8180dca AP |
763 | |
764 | if (unlikely(!kvm_vcpu_initialized(vcpu))) | |
765 | return -ENOEXEC; | |
766 | ||
749cf76c CD |
767 | if (copy_from_user(®, argp, sizeof(reg))) |
768 | return -EFAULT; | |
769 | if (ioctl == KVM_SET_ONE_REG) | |
770 | return kvm_arm_set_reg(vcpu, ®); | |
771 | else | |
772 | return kvm_arm_get_reg(vcpu, ®); | |
773 | } | |
774 | case KVM_GET_REG_LIST: { | |
775 | struct kvm_reg_list __user *user_list = argp; | |
776 | struct kvm_reg_list reg_list; | |
777 | unsigned n; | |
778 | ||
e8180dca AP |
779 | if (unlikely(!kvm_vcpu_initialized(vcpu))) |
780 | return -ENOEXEC; | |
781 | ||
749cf76c CD |
782 | if (copy_from_user(®_list, user_list, sizeof(reg_list))) |
783 | return -EFAULT; | |
784 | n = reg_list.n; | |
785 | reg_list.n = kvm_arm_num_regs(vcpu); | |
786 | if (copy_to_user(user_list, ®_list, sizeof(reg_list))) | |
787 | return -EFAULT; | |
788 | if (n < reg_list.n) | |
789 | return -E2BIG; | |
790 | return kvm_arm_copy_reg_indices(vcpu, user_list->reg); | |
791 | } | |
792 | default: | |
793 | return -EINVAL; | |
794 | } | |
795 | } | |
796 | ||
53c810c3 MS |
797 | /** |
798 | * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot | |
799 | * @kvm: kvm instance | |
800 | * @log: slot id and address to which we copy the log | |
801 | * | |
802 | * Steps 1-4 below provide general overview of dirty page logging. See | |
803 | * kvm_get_dirty_log_protect() function description for additional details. | |
804 | * | |
805 | * We call kvm_get_dirty_log_protect() to handle steps 1-3, upon return we | |
806 | * always flush the TLB (step 4) even if previous step failed and the dirty | |
807 | * bitmap may be corrupt. Regardless of previous outcome the KVM logging API | |
808 | * does not preclude user space subsequent dirty log read. Flushing TLB ensures | |
809 | * writes will be marked dirty for next log read. | |
810 | * | |
811 | * 1. Take a snapshot of the bit and clear it if needed. | |
812 | * 2. Write protect the corresponding page. | |
813 | * 3. Copy the snapshot to the userspace. | |
814 | * 4. Flush TLB's if needed. | |
815 | */ | |
749cf76c CD |
816 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
817 | { | |
53c810c3 MS |
818 | bool is_dirty = false; |
819 | int r; | |
820 | ||
821 | mutex_lock(&kvm->slots_lock); | |
822 | ||
823 | r = kvm_get_dirty_log_protect(kvm, log, &is_dirty); | |
824 | ||
825 | if (is_dirty) | |
826 | kvm_flush_remote_tlbs(kvm); | |
827 | ||
828 | mutex_unlock(&kvm->slots_lock); | |
829 | return r; | |
749cf76c CD |
830 | } |
831 | ||
3401d546 CD |
832 | static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm, |
833 | struct kvm_arm_device_addr *dev_addr) | |
834 | { | |
330690cd CD |
835 | unsigned long dev_id, type; |
836 | ||
837 | dev_id = (dev_addr->id & KVM_ARM_DEVICE_ID_MASK) >> | |
838 | KVM_ARM_DEVICE_ID_SHIFT; | |
839 | type = (dev_addr->id & KVM_ARM_DEVICE_TYPE_MASK) >> | |
840 | KVM_ARM_DEVICE_TYPE_SHIFT; | |
841 | ||
842 | switch (dev_id) { | |
843 | case KVM_ARM_DEVICE_VGIC_V2: | |
844 | if (!vgic_present) | |
845 | return -ENXIO; | |
ce01e4e8 | 846 | return kvm_vgic_addr(kvm, type, &dev_addr->addr, true); |
330690cd CD |
847 | default: |
848 | return -ENODEV; | |
849 | } | |
3401d546 CD |
850 | } |
851 | ||
749cf76c CD |
852 | long kvm_arch_vm_ioctl(struct file *filp, |
853 | unsigned int ioctl, unsigned long arg) | |
854 | { | |
3401d546 CD |
855 | struct kvm *kvm = filp->private_data; |
856 | void __user *argp = (void __user *)arg; | |
857 | ||
858 | switch (ioctl) { | |
5863c2ce MZ |
859 | case KVM_CREATE_IRQCHIP: { |
860 | if (vgic_present) | |
59892136 | 861 | return kvm_vgic_create(kvm, KVM_DEV_TYPE_ARM_VGIC_V2); |
5863c2ce MZ |
862 | else |
863 | return -ENXIO; | |
864 | } | |
3401d546 CD |
865 | case KVM_ARM_SET_DEVICE_ADDR: { |
866 | struct kvm_arm_device_addr dev_addr; | |
867 | ||
868 | if (copy_from_user(&dev_addr, argp, sizeof(dev_addr))) | |
869 | return -EFAULT; | |
870 | return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr); | |
871 | } | |
42c4e0c7 AP |
872 | case KVM_ARM_PREFERRED_TARGET: { |
873 | int err; | |
874 | struct kvm_vcpu_init init; | |
875 | ||
876 | err = kvm_vcpu_preferred_target(&init); | |
877 | if (err) | |
878 | return err; | |
879 | ||
880 | if (copy_to_user(argp, &init, sizeof(init))) | |
881 | return -EFAULT; | |
882 | ||
883 | return 0; | |
884 | } | |
3401d546 CD |
885 | default: |
886 | return -EINVAL; | |
887 | } | |
749cf76c CD |
888 | } |
889 | ||
d157f4a5 | 890 | static void cpu_init_hyp_mode(void *dummy) |
342cd0ab | 891 | { |
dac288f7 MZ |
892 | phys_addr_t boot_pgd_ptr; |
893 | phys_addr_t pgd_ptr; | |
342cd0ab CD |
894 | unsigned long hyp_stack_ptr; |
895 | unsigned long stack_page; | |
896 | unsigned long vector_ptr; | |
897 | ||
898 | /* Switch from the HYP stub to our own HYP init vector */ | |
5a677ce0 | 899 | __hyp_set_vectors(kvm_get_idmap_vector()); |
342cd0ab | 900 | |
dac288f7 MZ |
901 | boot_pgd_ptr = kvm_mmu_get_boot_httbr(); |
902 | pgd_ptr = kvm_mmu_get_httbr(); | |
1436c1aa | 903 | stack_page = __this_cpu_read(kvm_arm_hyp_stack_page); |
342cd0ab CD |
904 | hyp_stack_ptr = stack_page + PAGE_SIZE; |
905 | vector_ptr = (unsigned long)__kvm_hyp_vector; | |
906 | ||
5a677ce0 | 907 | __cpu_init_hyp_mode(boot_pgd_ptr, pgd_ptr, hyp_stack_ptr, vector_ptr); |
342cd0ab CD |
908 | } |
909 | ||
d157f4a5 MZ |
910 | static int hyp_init_cpu_notify(struct notifier_block *self, |
911 | unsigned long action, void *cpu) | |
912 | { | |
913 | switch (action) { | |
914 | case CPU_STARTING: | |
915 | case CPU_STARTING_FROZEN: | |
37a34ac1 VM |
916 | if (__hyp_get_vectors() == hyp_default_vectors) |
917 | cpu_init_hyp_mode(NULL); | |
d157f4a5 MZ |
918 | break; |
919 | } | |
920 | ||
921 | return NOTIFY_OK; | |
342cd0ab CD |
922 | } |
923 | ||
d157f4a5 MZ |
924 | static struct notifier_block hyp_init_cpu_nb = { |
925 | .notifier_call = hyp_init_cpu_notify, | |
926 | }; | |
927 | ||
1fcf7ce0 LP |
928 | #ifdef CONFIG_CPU_PM |
929 | static int hyp_init_cpu_pm_notifier(struct notifier_block *self, | |
930 | unsigned long cmd, | |
931 | void *v) | |
932 | { | |
b20c9f29 MZ |
933 | if (cmd == CPU_PM_EXIT && |
934 | __hyp_get_vectors() == hyp_default_vectors) { | |
1fcf7ce0 LP |
935 | cpu_init_hyp_mode(NULL); |
936 | return NOTIFY_OK; | |
937 | } | |
938 | ||
939 | return NOTIFY_DONE; | |
940 | } | |
941 | ||
942 | static struct notifier_block hyp_init_cpu_pm_nb = { | |
943 | .notifier_call = hyp_init_cpu_pm_notifier, | |
944 | }; | |
945 | ||
946 | static void __init hyp_cpu_pm_init(void) | |
947 | { | |
948 | cpu_pm_register_notifier(&hyp_init_cpu_pm_nb); | |
949 | } | |
950 | #else | |
951 | static inline void hyp_cpu_pm_init(void) | |
952 | { | |
953 | } | |
954 | #endif | |
955 | ||
342cd0ab CD |
956 | /** |
957 | * Inits Hyp-mode on all online CPUs | |
958 | */ | |
959 | static int init_hyp_mode(void) | |
960 | { | |
342cd0ab CD |
961 | int cpu; |
962 | int err = 0; | |
963 | ||
964 | /* | |
965 | * Allocate Hyp PGD and setup Hyp identity mapping | |
966 | */ | |
967 | err = kvm_mmu_init(); | |
968 | if (err) | |
969 | goto out_err; | |
970 | ||
971 | /* | |
972 | * It is probably enough to obtain the default on one | |
973 | * CPU. It's unlikely to be different on the others. | |
974 | */ | |
975 | hyp_default_vectors = __hyp_get_vectors(); | |
976 | ||
977 | /* | |
978 | * Allocate stack pages for Hypervisor-mode | |
979 | */ | |
980 | for_each_possible_cpu(cpu) { | |
981 | unsigned long stack_page; | |
982 | ||
983 | stack_page = __get_free_page(GFP_KERNEL); | |
984 | if (!stack_page) { | |
985 | err = -ENOMEM; | |
986 | goto out_free_stack_pages; | |
987 | } | |
988 | ||
989 | per_cpu(kvm_arm_hyp_stack_page, cpu) = stack_page; | |
990 | } | |
991 | ||
342cd0ab CD |
992 | /* |
993 | * Map the Hyp-code called directly from the host | |
994 | */ | |
995 | err = create_hyp_mappings(__kvm_hyp_code_start, __kvm_hyp_code_end); | |
996 | if (err) { | |
997 | kvm_err("Cannot map world-switch code\n"); | |
998 | goto out_free_mappings; | |
999 | } | |
1000 | ||
1001 | /* | |
1002 | * Map the Hyp stack pages | |
1003 | */ | |
1004 | for_each_possible_cpu(cpu) { | |
1005 | char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu); | |
1006 | err = create_hyp_mappings(stack_page, stack_page + PAGE_SIZE); | |
1007 | ||
1008 | if (err) { | |
1009 | kvm_err("Cannot map hyp stack\n"); | |
1010 | goto out_free_mappings; | |
1011 | } | |
1012 | } | |
1013 | ||
1014 | /* | |
3de50da6 | 1015 | * Map the host CPU structures |
342cd0ab | 1016 | */ |
3de50da6 MZ |
1017 | kvm_host_cpu_state = alloc_percpu(kvm_cpu_context_t); |
1018 | if (!kvm_host_cpu_state) { | |
342cd0ab | 1019 | err = -ENOMEM; |
3de50da6 | 1020 | kvm_err("Cannot allocate host CPU state\n"); |
342cd0ab CD |
1021 | goto out_free_mappings; |
1022 | } | |
1023 | ||
1024 | for_each_possible_cpu(cpu) { | |
3de50da6 | 1025 | kvm_cpu_context_t *cpu_ctxt; |
342cd0ab | 1026 | |
3de50da6 MZ |
1027 | cpu_ctxt = per_cpu_ptr(kvm_host_cpu_state, cpu); |
1028 | err = create_hyp_mappings(cpu_ctxt, cpu_ctxt + 1); | |
342cd0ab CD |
1029 | |
1030 | if (err) { | |
3de50da6 MZ |
1031 | kvm_err("Cannot map host CPU state: %d\n", err); |
1032 | goto out_free_context; | |
342cd0ab CD |
1033 | } |
1034 | } | |
1035 | ||
d157f4a5 MZ |
1036 | /* |
1037 | * Execute the init code on each CPU. | |
1038 | */ | |
1039 | on_each_cpu(cpu_init_hyp_mode, NULL, 1); | |
1040 | ||
1a89dd91 MZ |
1041 | /* |
1042 | * Init HYP view of VGIC | |
1043 | */ | |
1044 | err = kvm_vgic_hyp_init(); | |
1045 | if (err) | |
3de50da6 | 1046 | goto out_free_context; |
1a89dd91 | 1047 | |
01ac5e34 MZ |
1048 | #ifdef CONFIG_KVM_ARM_VGIC |
1049 | vgic_present = true; | |
1050 | #endif | |
1051 | ||
967f8427 MZ |
1052 | /* |
1053 | * Init HYP architected timer support | |
1054 | */ | |
1055 | err = kvm_timer_hyp_init(); | |
1056 | if (err) | |
1057 | goto out_free_mappings; | |
1058 | ||
d157f4a5 MZ |
1059 | #ifndef CONFIG_HOTPLUG_CPU |
1060 | free_boot_hyp_pgd(); | |
1061 | #endif | |
1062 | ||
210552c1 MZ |
1063 | kvm_perf_init(); |
1064 | ||
342cd0ab | 1065 | kvm_info("Hyp mode initialized successfully\n"); |
210552c1 | 1066 | |
342cd0ab | 1067 | return 0; |
3de50da6 MZ |
1068 | out_free_context: |
1069 | free_percpu(kvm_host_cpu_state); | |
342cd0ab | 1070 | out_free_mappings: |
4f728276 | 1071 | free_hyp_pgds(); |
342cd0ab CD |
1072 | out_free_stack_pages: |
1073 | for_each_possible_cpu(cpu) | |
1074 | free_page(per_cpu(kvm_arm_hyp_stack_page, cpu)); | |
1075 | out_err: | |
1076 | kvm_err("error initializing Hyp mode: %d\n", err); | |
1077 | return err; | |
1078 | } | |
1079 | ||
d4e071ce AP |
1080 | static void check_kvm_target_cpu(void *ret) |
1081 | { | |
1082 | *(int *)ret = kvm_target_cpu(); | |
1083 | } | |
1084 | ||
4429fc64 AP |
1085 | struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr) |
1086 | { | |
1087 | struct kvm_vcpu *vcpu; | |
1088 | int i; | |
1089 | ||
1090 | mpidr &= MPIDR_HWID_BITMASK; | |
1091 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1092 | if (mpidr == kvm_vcpu_get_mpidr_aff(vcpu)) | |
1093 | return vcpu; | |
1094 | } | |
1095 | return NULL; | |
1096 | } | |
1097 | ||
342cd0ab CD |
1098 | /** |
1099 | * Initialize Hyp-mode and memory mappings on all CPUs. | |
1100 | */ | |
749cf76c CD |
1101 | int kvm_arch_init(void *opaque) |
1102 | { | |
342cd0ab | 1103 | int err; |
d4e071ce | 1104 | int ret, cpu; |
342cd0ab CD |
1105 | |
1106 | if (!is_hyp_mode_available()) { | |
1107 | kvm_err("HYP mode not available\n"); | |
1108 | return -ENODEV; | |
1109 | } | |
1110 | ||
d4e071ce AP |
1111 | for_each_online_cpu(cpu) { |
1112 | smp_call_function_single(cpu, check_kvm_target_cpu, &ret, 1); | |
1113 | if (ret < 0) { | |
1114 | kvm_err("Error, CPU %d not supported!\n", cpu); | |
1115 | return -ENODEV; | |
1116 | } | |
342cd0ab CD |
1117 | } |
1118 | ||
8146875d SB |
1119 | cpu_notifier_register_begin(); |
1120 | ||
342cd0ab CD |
1121 | err = init_hyp_mode(); |
1122 | if (err) | |
1123 | goto out_err; | |
1124 | ||
8146875d | 1125 | err = __register_cpu_notifier(&hyp_init_cpu_nb); |
d157f4a5 MZ |
1126 | if (err) { |
1127 | kvm_err("Cannot register HYP init CPU notifier (%d)\n", err); | |
1128 | goto out_err; | |
1129 | } | |
1130 | ||
8146875d SB |
1131 | cpu_notifier_register_done(); |
1132 | ||
1fcf7ce0 LP |
1133 | hyp_cpu_pm_init(); |
1134 | ||
5b3e5e5b | 1135 | kvm_coproc_table_init(); |
749cf76c | 1136 | return 0; |
342cd0ab | 1137 | out_err: |
8146875d | 1138 | cpu_notifier_register_done(); |
342cd0ab | 1139 | return err; |
749cf76c CD |
1140 | } |
1141 | ||
1142 | /* NOP: Compiling as a module not supported */ | |
1143 | void kvm_arch_exit(void) | |
1144 | { | |
210552c1 | 1145 | kvm_perf_teardown(); |
749cf76c CD |
1146 | } |
1147 | ||
1148 | static int arm_init(void) | |
1149 | { | |
1150 | int rc = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); | |
1151 | return rc; | |
1152 | } | |
1153 | ||
1154 | module_init(arm_init); |