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bbf45ba5 HB |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License, version 2, as | |
4 | * published by the Free Software Foundation. | |
5 | * | |
6 | * This program is distributed in the hope that it will be useful, | |
7 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
8 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
9 | * GNU General Public License for more details. | |
10 | * | |
11 | * You should have received a copy of the GNU General Public License | |
12 | * along with this program; if not, write to the Free Software | |
13 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
14 | * | |
15 | * Copyright IBM Corp. 2007 | |
16 | * | |
17 | * Authors: Hollis Blanchard <hollisb@us.ibm.com> | |
18 | * Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> | |
19 | */ | |
20 | ||
21 | #include <linux/errno.h> | |
22 | #include <linux/err.h> | |
23 | #include <linux/kvm_host.h> | |
bbf45ba5 | 24 | #include <linux/vmalloc.h> |
544c6761 | 25 | #include <linux/hrtimer.h> |
bbf45ba5 | 26 | #include <linux/fs.h> |
5a0e3ad6 | 27 | #include <linux/slab.h> |
bbf45ba5 HB |
28 | #include <asm/cputable.h> |
29 | #include <asm/uaccess.h> | |
30 | #include <asm/kvm_ppc.h> | |
83aae4a8 | 31 | #include <asm/tlbflush.h> |
371fefd6 | 32 | #include <asm/cputhreads.h> |
bd2be683 | 33 | #include <asm/irqflags.h> |
73e75b41 | 34 | #include "timing.h" |
fad7b9b5 | 35 | #include "../mm/mmu_decl.h" |
bbf45ba5 | 36 | |
46f43c6e MT |
37 | #define CREATE_TRACE_POINTS |
38 | #include "trace.h" | |
39 | ||
bbf45ba5 HB |
40 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) |
41 | { | |
9202e076 | 42 | return !!(v->arch.pending_exceptions) || |
dfd4d47e | 43 | v->requests; |
bbf45ba5 HB |
44 | } |
45 | ||
b6d33834 CD |
46 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
47 | { | |
48 | return 1; | |
49 | } | |
50 | ||
03d25c5b AG |
51 | #ifndef CONFIG_KVM_BOOK3S_64_HV |
52 | /* | |
53 | * Common checks before entering the guest world. Call with interrupts | |
54 | * disabled. | |
55 | * | |
7ee78855 AG |
56 | * returns: |
57 | * | |
58 | * == 1 if we're ready to go into guest state | |
59 | * <= 0 if we need to go back to the host with return value | |
03d25c5b AG |
60 | */ |
61 | int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu) | |
62 | { | |
7ee78855 | 63 | int r = 1; |
03d25c5b AG |
64 | |
65 | WARN_ON_ONCE(!irqs_disabled()); | |
66 | while (true) { | |
67 | if (need_resched()) { | |
68 | local_irq_enable(); | |
69 | cond_resched(); | |
70 | local_irq_disable(); | |
71 | continue; | |
72 | } | |
73 | ||
74 | if (signal_pending(current)) { | |
7ee78855 AG |
75 | kvmppc_account_exit(vcpu, SIGNAL_EXITS); |
76 | vcpu->run->exit_reason = KVM_EXIT_INTR; | |
77 | r = -EINTR; | |
03d25c5b AG |
78 | break; |
79 | } | |
80 | ||
81 | smp_mb(); | |
82 | if (vcpu->requests) { | |
83 | /* Make sure we process requests preemptable */ | |
84 | local_irq_enable(); | |
85 | trace_kvm_check_requests(vcpu); | |
7c973a2e | 86 | r = kvmppc_core_check_requests(vcpu); |
03d25c5b | 87 | local_irq_disable(); |
7c973a2e AG |
88 | if (r > 0) |
89 | continue; | |
90 | break; | |
03d25c5b AG |
91 | } |
92 | ||
93 | if (kvmppc_core_prepare_to_enter(vcpu)) { | |
94 | /* interrupts got enabled in between, so we | |
95 | are back at square 1 */ | |
96 | continue; | |
97 | } | |
98 | ||
bd2be683 AG |
99 | #ifdef CONFIG_PPC64 |
100 | /* lazy EE magic */ | |
101 | hard_irq_disable(); | |
102 | if (lazy_irq_pending()) { | |
103 | /* Got an interrupt in between, try again */ | |
104 | local_irq_enable(); | |
105 | local_irq_disable(); | |
3766a4c6 | 106 | kvm_guest_exit(); |
bd2be683 AG |
107 | continue; |
108 | } | |
109 | ||
110 | trace_hardirqs_on(); | |
111 | #endif | |
112 | ||
3766a4c6 AG |
113 | kvm_guest_enter(); |
114 | ||
03d25c5b AG |
115 | /* Going into guest context! Yay! */ |
116 | vcpu->mode = IN_GUEST_MODE; | |
117 | smp_wmb(); | |
118 | ||
119 | break; | |
120 | } | |
121 | ||
122 | return r; | |
123 | } | |
124 | #endif /* CONFIG_KVM_BOOK3S_64_HV */ | |
125 | ||
2a342ed5 AG |
126 | int kvmppc_kvm_pv(struct kvm_vcpu *vcpu) |
127 | { | |
128 | int nr = kvmppc_get_gpr(vcpu, 11); | |
129 | int r; | |
130 | unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3); | |
131 | unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4); | |
132 | unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5); | |
133 | unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6); | |
134 | unsigned long r2 = 0; | |
135 | ||
136 | if (!(vcpu->arch.shared->msr & MSR_SF)) { | |
137 | /* 32 bit mode */ | |
138 | param1 &= 0xffffffff; | |
139 | param2 &= 0xffffffff; | |
140 | param3 &= 0xffffffff; | |
141 | param4 &= 0xffffffff; | |
142 | } | |
143 | ||
144 | switch (nr) { | |
fdcf8bd7 | 145 | case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE): |
5fc87407 AG |
146 | { |
147 | vcpu->arch.magic_page_pa = param1; | |
148 | vcpu->arch.magic_page_ea = param2; | |
149 | ||
b5904972 | 150 | r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7; |
7508e16c | 151 | |
fdcf8bd7 | 152 | r = EV_SUCCESS; |
5fc87407 AG |
153 | break; |
154 | } | |
fdcf8bd7 SY |
155 | case KVM_HCALL_TOKEN(KVM_HC_FEATURES): |
156 | r = EV_SUCCESS; | |
bf7ca4bd | 157 | #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2) |
a4cd8b23 | 158 | /* XXX Missing magic page on 44x */ |
5fc87407 AG |
159 | r2 |= (1 << KVM_FEATURE_MAGIC_PAGE); |
160 | #endif | |
2a342ed5 AG |
161 | |
162 | /* Second return value is in r4 */ | |
2a342ed5 | 163 | break; |
9202e076 LYB |
164 | case EV_HCALL_TOKEN(EV_IDLE): |
165 | r = EV_SUCCESS; | |
166 | kvm_vcpu_block(vcpu); | |
167 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); | |
168 | break; | |
2a342ed5 | 169 | default: |
fdcf8bd7 | 170 | r = EV_UNIMPLEMENTED; |
2a342ed5 AG |
171 | break; |
172 | } | |
173 | ||
7508e16c AG |
174 | kvmppc_set_gpr(vcpu, 4, r2); |
175 | ||
2a342ed5 AG |
176 | return r; |
177 | } | |
bbf45ba5 | 178 | |
af8f38b3 AG |
179 | int kvmppc_sanity_check(struct kvm_vcpu *vcpu) |
180 | { | |
181 | int r = false; | |
182 | ||
183 | /* We have to know what CPU to virtualize */ | |
184 | if (!vcpu->arch.pvr) | |
185 | goto out; | |
186 | ||
187 | /* PAPR only works with book3s_64 */ | |
188 | if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled) | |
189 | goto out; | |
190 | ||
191 | #ifdef CONFIG_KVM_BOOK3S_64_HV | |
192 | /* HV KVM can only do PAPR mode for now */ | |
193 | if (!vcpu->arch.papr_enabled) | |
194 | goto out; | |
195 | #endif | |
196 | ||
d30f6e48 SW |
197 | #ifdef CONFIG_KVM_BOOKE_HV |
198 | if (!cpu_has_feature(CPU_FTR_EMB_HV)) | |
199 | goto out; | |
200 | #endif | |
201 | ||
af8f38b3 AG |
202 | r = true; |
203 | ||
204 | out: | |
205 | vcpu->arch.sane = r; | |
206 | return r ? 0 : -EINVAL; | |
207 | } | |
208 | ||
bbf45ba5 HB |
209 | int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu) |
210 | { | |
211 | enum emulation_result er; | |
212 | int r; | |
213 | ||
214 | er = kvmppc_emulate_instruction(run, vcpu); | |
215 | switch (er) { | |
216 | case EMULATE_DONE: | |
217 | /* Future optimization: only reload non-volatiles if they were | |
218 | * actually modified. */ | |
219 | r = RESUME_GUEST_NV; | |
220 | break; | |
221 | case EMULATE_DO_MMIO: | |
222 | run->exit_reason = KVM_EXIT_MMIO; | |
223 | /* We must reload nonvolatiles because "update" load/store | |
224 | * instructions modify register state. */ | |
225 | /* Future optimization: only reload non-volatiles if they were | |
226 | * actually modified. */ | |
227 | r = RESUME_HOST_NV; | |
228 | break; | |
229 | case EMULATE_FAIL: | |
230 | /* XXX Deliver Program interrupt to guest. */ | |
231 | printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__, | |
c7f38f46 | 232 | kvmppc_get_last_inst(vcpu)); |
bbf45ba5 HB |
233 | r = RESUME_HOST; |
234 | break; | |
235 | default: | |
236 | BUG(); | |
237 | } | |
238 | ||
239 | return r; | |
240 | } | |
241 | ||
10474ae8 | 242 | int kvm_arch_hardware_enable(void *garbage) |
bbf45ba5 | 243 | { |
10474ae8 | 244 | return 0; |
bbf45ba5 HB |
245 | } |
246 | ||
247 | void kvm_arch_hardware_disable(void *garbage) | |
248 | { | |
249 | } | |
250 | ||
251 | int kvm_arch_hardware_setup(void) | |
252 | { | |
253 | return 0; | |
254 | } | |
255 | ||
256 | void kvm_arch_hardware_unsetup(void) | |
257 | { | |
258 | } | |
259 | ||
260 | void kvm_arch_check_processor_compat(void *rtn) | |
261 | { | |
9dd921cf | 262 | *(int *)rtn = kvmppc_core_check_processor_compat(); |
bbf45ba5 HB |
263 | } |
264 | ||
e08b9637 | 265 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
bbf45ba5 | 266 | { |
e08b9637 CO |
267 | if (type) |
268 | return -EINVAL; | |
269 | ||
f9e0554d | 270 | return kvmppc_core_init_vm(kvm); |
bbf45ba5 HB |
271 | } |
272 | ||
d89f5eff | 273 | void kvm_arch_destroy_vm(struct kvm *kvm) |
bbf45ba5 HB |
274 | { |
275 | unsigned int i; | |
988a2cae | 276 | struct kvm_vcpu *vcpu; |
bbf45ba5 | 277 | |
988a2cae GN |
278 | kvm_for_each_vcpu(i, vcpu, kvm) |
279 | kvm_arch_vcpu_free(vcpu); | |
280 | ||
281 | mutex_lock(&kvm->lock); | |
282 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
283 | kvm->vcpus[i] = NULL; | |
284 | ||
285 | atomic_set(&kvm->online_vcpus, 0); | |
f9e0554d PM |
286 | |
287 | kvmppc_core_destroy_vm(kvm); | |
288 | ||
988a2cae | 289 | mutex_unlock(&kvm->lock); |
bbf45ba5 HB |
290 | } |
291 | ||
ad8ba2cd SY |
292 | void kvm_arch_sync_events(struct kvm *kvm) |
293 | { | |
294 | } | |
295 | ||
bbf45ba5 HB |
296 | int kvm_dev_ioctl_check_extension(long ext) |
297 | { | |
298 | int r; | |
299 | ||
300 | switch (ext) { | |
5ce941ee SW |
301 | #ifdef CONFIG_BOOKE |
302 | case KVM_CAP_PPC_BOOKE_SREGS: | |
f61c94bb | 303 | case KVM_CAP_PPC_BOOKE_WATCHDOG: |
5ce941ee | 304 | #else |
e15a1137 | 305 | case KVM_CAP_PPC_SEGSTATE: |
1022fc3d | 306 | case KVM_CAP_PPC_HIOR: |
930b412a | 307 | case KVM_CAP_PPC_PAPR: |
5ce941ee | 308 | #endif |
18978768 | 309 | case KVM_CAP_PPC_UNSET_IRQ: |
7b4203e8 | 310 | case KVM_CAP_PPC_IRQ_LEVEL: |
71fbfd5f | 311 | case KVM_CAP_ENABLE_CAP: |
e24ed81f | 312 | case KVM_CAP_ONE_REG: |
de56a948 PM |
313 | r = 1; |
314 | break; | |
315 | #ifndef CONFIG_KVM_BOOK3S_64_HV | |
316 | case KVM_CAP_PPC_PAIRED_SINGLES: | |
ad0a048b | 317 | case KVM_CAP_PPC_OSI: |
15711e9c | 318 | case KVM_CAP_PPC_GET_PVINFO: |
bf7ca4bd | 319 | #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) |
dc83b8bc SW |
320 | case KVM_CAP_SW_TLB: |
321 | #endif | |
e15a1137 AG |
322 | r = 1; |
323 | break; | |
588968b6 LV |
324 | case KVM_CAP_COALESCED_MMIO: |
325 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
326 | break; | |
54738c09 | 327 | #endif |
f31e65e1 | 328 | #ifdef CONFIG_PPC_BOOK3S_64 |
54738c09 | 329 | case KVM_CAP_SPAPR_TCE: |
32fad281 | 330 | case KVM_CAP_PPC_ALLOC_HTAB: |
54738c09 DG |
331 | r = 1; |
332 | break; | |
f31e65e1 BH |
333 | #endif /* CONFIG_PPC_BOOK3S_64 */ |
334 | #ifdef CONFIG_KVM_BOOK3S_64_HV | |
371fefd6 PM |
335 | case KVM_CAP_PPC_SMT: |
336 | r = threads_per_core; | |
337 | break; | |
aa04b4cc PM |
338 | case KVM_CAP_PPC_RMA: |
339 | r = 1; | |
9e368f29 PM |
340 | /* PPC970 requires an RMA */ |
341 | if (cpu_has_feature(CPU_FTR_ARCH_201)) | |
342 | r = 2; | |
aa04b4cc | 343 | break; |
f4800b1f | 344 | #endif |
342d3db7 | 345 | case KVM_CAP_SYNC_MMU: |
f4800b1f | 346 | #ifdef CONFIG_KVM_BOOK3S_64_HV |
342d3db7 | 347 | r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0; |
f4800b1f AG |
348 | #elif defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
349 | r = 1; | |
350 | #else | |
351 | r = 0; | |
de56a948 | 352 | #endif |
f4800b1f | 353 | break; |
b5434032 ME |
354 | case KVM_CAP_NR_VCPUS: |
355 | /* | |
356 | * Recommending a number of CPUs is somewhat arbitrary; we | |
357 | * return the number of present CPUs for -HV (since a host | |
358 | * will have secondary threads "offline"), and for other KVM | |
359 | * implementations just count online CPUs. | |
360 | */ | |
361 | #ifdef CONFIG_KVM_BOOK3S_64_HV | |
362 | r = num_present_cpus(); | |
363 | #else | |
364 | r = num_online_cpus(); | |
365 | #endif | |
366 | break; | |
367 | case KVM_CAP_MAX_VCPUS: | |
368 | r = KVM_MAX_VCPUS; | |
369 | break; | |
5b74716e BH |
370 | #ifdef CONFIG_PPC_BOOK3S_64 |
371 | case KVM_CAP_PPC_GET_SMMU_INFO: | |
372 | r = 1; | |
373 | break; | |
374 | #endif | |
bbf45ba5 HB |
375 | default: |
376 | r = 0; | |
377 | break; | |
378 | } | |
379 | return r; | |
380 | ||
381 | } | |
382 | ||
383 | long kvm_arch_dev_ioctl(struct file *filp, | |
384 | unsigned int ioctl, unsigned long arg) | |
385 | { | |
386 | return -EINVAL; | |
387 | } | |
388 | ||
db3fe4eb TY |
389 | void kvm_arch_free_memslot(struct kvm_memory_slot *free, |
390 | struct kvm_memory_slot *dont) | |
391 | { | |
a66b48c3 | 392 | kvmppc_core_free_memslot(free, dont); |
db3fe4eb TY |
393 | } |
394 | ||
395 | int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) | |
396 | { | |
a66b48c3 | 397 | return kvmppc_core_create_memslot(slot, npages); |
db3fe4eb TY |
398 | } |
399 | ||
f7784b8e MT |
400 | int kvm_arch_prepare_memory_region(struct kvm *kvm, |
401 | struct kvm_memory_slot *memslot, | |
402 | struct kvm_memory_slot old, | |
403 | struct kvm_userspace_memory_region *mem, | |
404 | int user_alloc) | |
bbf45ba5 | 405 | { |
a66b48c3 | 406 | return kvmppc_core_prepare_memory_region(kvm, memslot, mem); |
bbf45ba5 HB |
407 | } |
408 | ||
f7784b8e MT |
409 | void kvm_arch_commit_memory_region(struct kvm *kvm, |
410 | struct kvm_userspace_memory_region *mem, | |
411 | struct kvm_memory_slot old, | |
412 | int user_alloc) | |
413 | { | |
f9e0554d | 414 | kvmppc_core_commit_memory_region(kvm, mem); |
f7784b8e MT |
415 | } |
416 | ||
2df72e9b MT |
417 | void kvm_arch_flush_shadow_all(struct kvm *kvm) |
418 | { | |
419 | } | |
f7784b8e | 420 | |
2df72e9b MT |
421 | void kvm_arch_flush_shadow_memslot(struct kvm *kvm, |
422 | struct kvm_memory_slot *slot) | |
34d4cb8f MT |
423 | { |
424 | } | |
425 | ||
bbf45ba5 HB |
426 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) |
427 | { | |
73e75b41 HB |
428 | struct kvm_vcpu *vcpu; |
429 | vcpu = kvmppc_core_vcpu_create(kvm, id); | |
03cdab53 ME |
430 | if (!IS_ERR(vcpu)) { |
431 | vcpu->arch.wqp = &vcpu->wq; | |
06056bfb | 432 | kvmppc_create_vcpu_debugfs(vcpu, id); |
03cdab53 | 433 | } |
73e75b41 | 434 | return vcpu; |
bbf45ba5 HB |
435 | } |
436 | ||
437 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
438 | { | |
a595405d AG |
439 | /* Make sure we're not using the vcpu anymore */ |
440 | hrtimer_cancel(&vcpu->arch.dec_timer); | |
441 | tasklet_kill(&vcpu->arch.tasklet); | |
442 | ||
73e75b41 | 443 | kvmppc_remove_vcpu_debugfs(vcpu); |
db93f574 | 444 | kvmppc_core_vcpu_free(vcpu); |
bbf45ba5 HB |
445 | } |
446 | ||
447 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) | |
448 | { | |
449 | kvm_arch_vcpu_free(vcpu); | |
450 | } | |
451 | ||
452 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) | |
453 | { | |
9dd921cf | 454 | return kvmppc_core_pending_dec(vcpu); |
bbf45ba5 HB |
455 | } |
456 | ||
544c6761 AG |
457 | /* |
458 | * low level hrtimer wake routine. Because this runs in hardirq context | |
459 | * we schedule a tasklet to do the real work. | |
460 | */ | |
461 | enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer) | |
462 | { | |
463 | struct kvm_vcpu *vcpu; | |
464 | ||
465 | vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer); | |
466 | tasklet_schedule(&vcpu->arch.tasklet); | |
467 | ||
468 | return HRTIMER_NORESTART; | |
469 | } | |
470 | ||
bbf45ba5 HB |
471 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
472 | { | |
f61c94bb BB |
473 | int ret; |
474 | ||
544c6761 AG |
475 | hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); |
476 | tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu); | |
477 | vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup; | |
de56a948 | 478 | vcpu->arch.dec_expires = ~(u64)0; |
bbf45ba5 | 479 | |
09000adb BB |
480 | #ifdef CONFIG_KVM_EXIT_TIMING |
481 | mutex_init(&vcpu->arch.exit_timing_lock); | |
482 | #endif | |
f61c94bb BB |
483 | ret = kvmppc_subarch_vcpu_init(vcpu); |
484 | return ret; | |
bbf45ba5 HB |
485 | } |
486 | ||
487 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
488 | { | |
ecc0981f | 489 | kvmppc_mmu_destroy(vcpu); |
f61c94bb | 490 | kvmppc_subarch_vcpu_uninit(vcpu); |
bbf45ba5 HB |
491 | } |
492 | ||
493 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
494 | { | |
eab17672 SW |
495 | #ifdef CONFIG_BOOKE |
496 | /* | |
497 | * vrsave (formerly usprg0) isn't used by Linux, but may | |
498 | * be used by the guest. | |
499 | * | |
500 | * On non-booke this is associated with Altivec and | |
501 | * is handled by code in book3s.c. | |
502 | */ | |
503 | mtspr(SPRN_VRSAVE, vcpu->arch.vrsave); | |
504 | #endif | |
9dd921cf | 505 | kvmppc_core_vcpu_load(vcpu, cpu); |
de56a948 | 506 | vcpu->cpu = smp_processor_id(); |
bbf45ba5 HB |
507 | } |
508 | ||
509 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
510 | { | |
9dd921cf | 511 | kvmppc_core_vcpu_put(vcpu); |
eab17672 SW |
512 | #ifdef CONFIG_BOOKE |
513 | vcpu->arch.vrsave = mfspr(SPRN_VRSAVE); | |
514 | #endif | |
de56a948 | 515 | vcpu->cpu = -1; |
bbf45ba5 HB |
516 | } |
517 | ||
d0bfb940 | 518 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
f5d0906b | 519 | struct kvm_guest_debug *dbg) |
bbf45ba5 | 520 | { |
f5d0906b | 521 | return -EINVAL; |
bbf45ba5 HB |
522 | } |
523 | ||
524 | static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu, | |
525 | struct kvm_run *run) | |
526 | { | |
8e5b26b5 | 527 | kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data); |
bbf45ba5 HB |
528 | } |
529 | ||
530 | static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu, | |
531 | struct kvm_run *run) | |
532 | { | |
69b61833 | 533 | u64 uninitialized_var(gpr); |
bbf45ba5 | 534 | |
8e5b26b5 | 535 | if (run->mmio.len > sizeof(gpr)) { |
bbf45ba5 HB |
536 | printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len); |
537 | return; | |
538 | } | |
539 | ||
540 | if (vcpu->arch.mmio_is_bigendian) { | |
541 | switch (run->mmio.len) { | |
b104d066 | 542 | case 8: gpr = *(u64 *)run->mmio.data; break; |
8e5b26b5 AG |
543 | case 4: gpr = *(u32 *)run->mmio.data; break; |
544 | case 2: gpr = *(u16 *)run->mmio.data; break; | |
545 | case 1: gpr = *(u8 *)run->mmio.data; break; | |
bbf45ba5 HB |
546 | } |
547 | } else { | |
548 | /* Convert BE data from userland back to LE. */ | |
549 | switch (run->mmio.len) { | |
8e5b26b5 AG |
550 | case 4: gpr = ld_le32((u32 *)run->mmio.data); break; |
551 | case 2: gpr = ld_le16((u16 *)run->mmio.data); break; | |
552 | case 1: gpr = *(u8 *)run->mmio.data; break; | |
bbf45ba5 HB |
553 | } |
554 | } | |
8e5b26b5 | 555 | |
3587d534 AG |
556 | if (vcpu->arch.mmio_sign_extend) { |
557 | switch (run->mmio.len) { | |
558 | #ifdef CONFIG_PPC64 | |
559 | case 4: | |
560 | gpr = (s64)(s32)gpr; | |
561 | break; | |
562 | #endif | |
563 | case 2: | |
564 | gpr = (s64)(s16)gpr; | |
565 | break; | |
566 | case 1: | |
567 | gpr = (s64)(s8)gpr; | |
568 | break; | |
569 | } | |
570 | } | |
571 | ||
8e5b26b5 | 572 | kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr); |
b104d066 | 573 | |
b3c5d3c2 AG |
574 | switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) { |
575 | case KVM_MMIO_REG_GPR: | |
b104d066 AG |
576 | kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr); |
577 | break; | |
b3c5d3c2 AG |
578 | case KVM_MMIO_REG_FPR: |
579 | vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; | |
b104d066 | 580 | break; |
287d5611 | 581 | #ifdef CONFIG_PPC_BOOK3S |
b3c5d3c2 AG |
582 | case KVM_MMIO_REG_QPR: |
583 | vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; | |
b104d066 | 584 | break; |
b3c5d3c2 AG |
585 | case KVM_MMIO_REG_FQPR: |
586 | vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; | |
587 | vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; | |
b104d066 | 588 | break; |
287d5611 | 589 | #endif |
b104d066 AG |
590 | default: |
591 | BUG(); | |
592 | } | |
bbf45ba5 HB |
593 | } |
594 | ||
595 | int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
596 | unsigned int rt, unsigned int bytes, int is_bigendian) | |
597 | { | |
598 | if (bytes > sizeof(run->mmio.data)) { | |
599 | printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, | |
600 | run->mmio.len); | |
601 | } | |
602 | ||
603 | run->mmio.phys_addr = vcpu->arch.paddr_accessed; | |
604 | run->mmio.len = bytes; | |
605 | run->mmio.is_write = 0; | |
606 | ||
607 | vcpu->arch.io_gpr = rt; | |
608 | vcpu->arch.mmio_is_bigendian = is_bigendian; | |
609 | vcpu->mmio_needed = 1; | |
610 | vcpu->mmio_is_write = 0; | |
3587d534 | 611 | vcpu->arch.mmio_sign_extend = 0; |
bbf45ba5 HB |
612 | |
613 | return EMULATE_DO_MMIO; | |
614 | } | |
615 | ||
3587d534 AG |
616 | /* Same as above, but sign extends */ |
617 | int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
618 | unsigned int rt, unsigned int bytes, int is_bigendian) | |
619 | { | |
620 | int r; | |
621 | ||
622 | r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian); | |
623 | vcpu->arch.mmio_sign_extend = 1; | |
624 | ||
625 | return r; | |
626 | } | |
627 | ||
bbf45ba5 | 628 | int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu, |
b104d066 | 629 | u64 val, unsigned int bytes, int is_bigendian) |
bbf45ba5 HB |
630 | { |
631 | void *data = run->mmio.data; | |
632 | ||
633 | if (bytes > sizeof(run->mmio.data)) { | |
634 | printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, | |
635 | run->mmio.len); | |
636 | } | |
637 | ||
638 | run->mmio.phys_addr = vcpu->arch.paddr_accessed; | |
639 | run->mmio.len = bytes; | |
640 | run->mmio.is_write = 1; | |
641 | vcpu->mmio_needed = 1; | |
642 | vcpu->mmio_is_write = 1; | |
643 | ||
644 | /* Store the value at the lowest bytes in 'data'. */ | |
645 | if (is_bigendian) { | |
646 | switch (bytes) { | |
b104d066 | 647 | case 8: *(u64 *)data = val; break; |
bbf45ba5 HB |
648 | case 4: *(u32 *)data = val; break; |
649 | case 2: *(u16 *)data = val; break; | |
650 | case 1: *(u8 *)data = val; break; | |
651 | } | |
652 | } else { | |
653 | /* Store LE value into 'data'. */ | |
654 | switch (bytes) { | |
655 | case 4: st_le32(data, val); break; | |
656 | case 2: st_le16(data, val); break; | |
657 | case 1: *(u8 *)data = val; break; | |
658 | } | |
659 | } | |
660 | ||
661 | return EMULATE_DO_MMIO; | |
662 | } | |
663 | ||
664 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
665 | { | |
666 | int r; | |
667 | sigset_t sigsaved; | |
668 | ||
669 | if (vcpu->sigset_active) | |
670 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
671 | ||
672 | if (vcpu->mmio_needed) { | |
673 | if (!vcpu->mmio_is_write) | |
674 | kvmppc_complete_mmio_load(vcpu, run); | |
675 | vcpu->mmio_needed = 0; | |
676 | } else if (vcpu->arch.dcr_needed) { | |
677 | if (!vcpu->arch.dcr_is_write) | |
678 | kvmppc_complete_dcr_load(vcpu, run); | |
679 | vcpu->arch.dcr_needed = 0; | |
ad0a048b AG |
680 | } else if (vcpu->arch.osi_needed) { |
681 | u64 *gprs = run->osi.gprs; | |
682 | int i; | |
683 | ||
684 | for (i = 0; i < 32; i++) | |
685 | kvmppc_set_gpr(vcpu, i, gprs[i]); | |
686 | vcpu->arch.osi_needed = 0; | |
de56a948 PM |
687 | } else if (vcpu->arch.hcall_needed) { |
688 | int i; | |
689 | ||
690 | kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret); | |
691 | for (i = 0; i < 9; ++i) | |
692 | kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]); | |
693 | vcpu->arch.hcall_needed = 0; | |
bbf45ba5 HB |
694 | } |
695 | ||
df6909e5 | 696 | r = kvmppc_vcpu_run(run, vcpu); |
bbf45ba5 HB |
697 | |
698 | if (vcpu->sigset_active) | |
699 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
700 | ||
701 | return r; | |
702 | } | |
703 | ||
704 | int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) | |
705 | { | |
19ccb76a | 706 | if (irq->irq == KVM_INTERRUPT_UNSET) { |
18978768 | 707 | kvmppc_core_dequeue_external(vcpu, irq); |
19ccb76a PM |
708 | return 0; |
709 | } | |
710 | ||
711 | kvmppc_core_queue_external(vcpu, irq); | |
b6d33834 | 712 | |
dfd4d47e | 713 | kvm_vcpu_kick(vcpu); |
45c5eb67 | 714 | |
bbf45ba5 HB |
715 | return 0; |
716 | } | |
717 | ||
71fbfd5f AG |
718 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, |
719 | struct kvm_enable_cap *cap) | |
720 | { | |
721 | int r; | |
722 | ||
723 | if (cap->flags) | |
724 | return -EINVAL; | |
725 | ||
726 | switch (cap->cap) { | |
ad0a048b AG |
727 | case KVM_CAP_PPC_OSI: |
728 | r = 0; | |
729 | vcpu->arch.osi_enabled = true; | |
730 | break; | |
930b412a AG |
731 | case KVM_CAP_PPC_PAPR: |
732 | r = 0; | |
733 | vcpu->arch.papr_enabled = true; | |
734 | break; | |
f61c94bb BB |
735 | #ifdef CONFIG_BOOKE |
736 | case KVM_CAP_PPC_BOOKE_WATCHDOG: | |
737 | r = 0; | |
738 | vcpu->arch.watchdog_enabled = true; | |
739 | break; | |
740 | #endif | |
bf7ca4bd | 741 | #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) |
dc83b8bc SW |
742 | case KVM_CAP_SW_TLB: { |
743 | struct kvm_config_tlb cfg; | |
744 | void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0]; | |
745 | ||
746 | r = -EFAULT; | |
747 | if (copy_from_user(&cfg, user_ptr, sizeof(cfg))) | |
748 | break; | |
749 | ||
750 | r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg); | |
751 | break; | |
752 | } | |
753 | #endif | |
71fbfd5f AG |
754 | default: |
755 | r = -EINVAL; | |
756 | break; | |
757 | } | |
758 | ||
af8f38b3 AG |
759 | if (!r) |
760 | r = kvmppc_sanity_check(vcpu); | |
761 | ||
71fbfd5f AG |
762 | return r; |
763 | } | |
764 | ||
bbf45ba5 HB |
765 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
766 | struct kvm_mp_state *mp_state) | |
767 | { | |
768 | return -EINVAL; | |
769 | } | |
770 | ||
771 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
772 | struct kvm_mp_state *mp_state) | |
773 | { | |
774 | return -EINVAL; | |
775 | } | |
776 | ||
777 | long kvm_arch_vcpu_ioctl(struct file *filp, | |
778 | unsigned int ioctl, unsigned long arg) | |
779 | { | |
780 | struct kvm_vcpu *vcpu = filp->private_data; | |
781 | void __user *argp = (void __user *)arg; | |
782 | long r; | |
783 | ||
93736624 AK |
784 | switch (ioctl) { |
785 | case KVM_INTERRUPT: { | |
bbf45ba5 HB |
786 | struct kvm_interrupt irq; |
787 | r = -EFAULT; | |
788 | if (copy_from_user(&irq, argp, sizeof(irq))) | |
93736624 | 789 | goto out; |
bbf45ba5 | 790 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); |
93736624 | 791 | goto out; |
bbf45ba5 | 792 | } |
19483d14 | 793 | |
71fbfd5f AG |
794 | case KVM_ENABLE_CAP: |
795 | { | |
796 | struct kvm_enable_cap cap; | |
797 | r = -EFAULT; | |
798 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
799 | goto out; | |
800 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
801 | break; | |
802 | } | |
dc83b8bc | 803 | |
e24ed81f AG |
804 | case KVM_SET_ONE_REG: |
805 | case KVM_GET_ONE_REG: | |
806 | { | |
807 | struct kvm_one_reg reg; | |
808 | r = -EFAULT; | |
809 | if (copy_from_user(®, argp, sizeof(reg))) | |
810 | goto out; | |
811 | if (ioctl == KVM_SET_ONE_REG) | |
812 | r = kvm_vcpu_ioctl_set_one_reg(vcpu, ®); | |
813 | else | |
814 | r = kvm_vcpu_ioctl_get_one_reg(vcpu, ®); | |
815 | break; | |
816 | } | |
817 | ||
bf7ca4bd | 818 | #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) |
dc83b8bc SW |
819 | case KVM_DIRTY_TLB: { |
820 | struct kvm_dirty_tlb dirty; | |
821 | r = -EFAULT; | |
822 | if (copy_from_user(&dirty, argp, sizeof(dirty))) | |
823 | goto out; | |
824 | r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty); | |
825 | break; | |
826 | } | |
827 | #endif | |
bbf45ba5 HB |
828 | default: |
829 | r = -EINVAL; | |
830 | } | |
831 | ||
832 | out: | |
833 | return r; | |
834 | } | |
835 | ||
5b1c1493 CO |
836 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
837 | { | |
838 | return VM_FAULT_SIGBUS; | |
839 | } | |
840 | ||
15711e9c AG |
841 | static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo) |
842 | { | |
784bafac SY |
843 | u32 inst_nop = 0x60000000; |
844 | #ifdef CONFIG_KVM_BOOKE_HV | |
845 | u32 inst_sc1 = 0x44000022; | |
846 | pvinfo->hcall[0] = inst_sc1; | |
847 | pvinfo->hcall[1] = inst_nop; | |
848 | pvinfo->hcall[2] = inst_nop; | |
849 | pvinfo->hcall[3] = inst_nop; | |
850 | #else | |
15711e9c AG |
851 | u32 inst_lis = 0x3c000000; |
852 | u32 inst_ori = 0x60000000; | |
15711e9c AG |
853 | u32 inst_sc = 0x44000002; |
854 | u32 inst_imm_mask = 0xffff; | |
855 | ||
856 | /* | |
857 | * The hypercall to get into KVM from within guest context is as | |
858 | * follows: | |
859 | * | |
860 | * lis r0, r0, KVM_SC_MAGIC_R0@h | |
861 | * ori r0, KVM_SC_MAGIC_R0@l | |
862 | * sc | |
863 | * nop | |
864 | */ | |
865 | pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask); | |
866 | pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask); | |
867 | pvinfo->hcall[2] = inst_sc; | |
868 | pvinfo->hcall[3] = inst_nop; | |
784bafac | 869 | #endif |
15711e9c | 870 | |
9202e076 LYB |
871 | pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE; |
872 | ||
15711e9c AG |
873 | return 0; |
874 | } | |
875 | ||
bbf45ba5 HB |
876 | long kvm_arch_vm_ioctl(struct file *filp, |
877 | unsigned int ioctl, unsigned long arg) | |
878 | { | |
15711e9c | 879 | void __user *argp = (void __user *)arg; |
bbf45ba5 HB |
880 | long r; |
881 | ||
882 | switch (ioctl) { | |
15711e9c AG |
883 | case KVM_PPC_GET_PVINFO: { |
884 | struct kvm_ppc_pvinfo pvinfo; | |
d8cdddcd | 885 | memset(&pvinfo, 0, sizeof(pvinfo)); |
15711e9c AG |
886 | r = kvm_vm_ioctl_get_pvinfo(&pvinfo); |
887 | if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) { | |
888 | r = -EFAULT; | |
889 | goto out; | |
890 | } | |
891 | ||
892 | break; | |
893 | } | |
f31e65e1 | 894 | #ifdef CONFIG_PPC_BOOK3S_64 |
54738c09 DG |
895 | case KVM_CREATE_SPAPR_TCE: { |
896 | struct kvm_create_spapr_tce create_tce; | |
897 | struct kvm *kvm = filp->private_data; | |
898 | ||
899 | r = -EFAULT; | |
900 | if (copy_from_user(&create_tce, argp, sizeof(create_tce))) | |
901 | goto out; | |
902 | r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce); | |
903 | goto out; | |
904 | } | |
f31e65e1 | 905 | #endif /* CONFIG_PPC_BOOK3S_64 */ |
aa04b4cc | 906 | |
f31e65e1 | 907 | #ifdef CONFIG_KVM_BOOK3S_64_HV |
aa04b4cc PM |
908 | case KVM_ALLOCATE_RMA: { |
909 | struct kvm *kvm = filp->private_data; | |
910 | struct kvm_allocate_rma rma; | |
911 | ||
912 | r = kvm_vm_ioctl_allocate_rma(kvm, &rma); | |
913 | if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma))) | |
914 | r = -EFAULT; | |
915 | break; | |
916 | } | |
32fad281 PM |
917 | |
918 | case KVM_PPC_ALLOCATE_HTAB: { | |
919 | struct kvm *kvm = filp->private_data; | |
920 | u32 htab_order; | |
921 | ||
922 | r = -EFAULT; | |
923 | if (get_user(htab_order, (u32 __user *)argp)) | |
924 | break; | |
925 | r = kvmppc_alloc_reset_hpt(kvm, &htab_order); | |
926 | if (r) | |
927 | break; | |
928 | r = -EFAULT; | |
929 | if (put_user(htab_order, (u32 __user *)argp)) | |
930 | break; | |
931 | r = 0; | |
932 | break; | |
933 | } | |
54738c09 DG |
934 | #endif /* CONFIG_KVM_BOOK3S_64_HV */ |
935 | ||
5b74716e BH |
936 | #ifdef CONFIG_PPC_BOOK3S_64 |
937 | case KVM_PPC_GET_SMMU_INFO: { | |
938 | struct kvm *kvm = filp->private_data; | |
939 | struct kvm_ppc_smmu_info info; | |
940 | ||
941 | memset(&info, 0, sizeof(info)); | |
942 | r = kvm_vm_ioctl_get_smmu_info(kvm, &info); | |
943 | if (r >= 0 && copy_to_user(argp, &info, sizeof(info))) | |
944 | r = -EFAULT; | |
945 | break; | |
946 | } | |
947 | #endif /* CONFIG_PPC_BOOK3S_64 */ | |
bbf45ba5 | 948 | default: |
367e1319 | 949 | r = -ENOTTY; |
bbf45ba5 HB |
950 | } |
951 | ||
15711e9c | 952 | out: |
bbf45ba5 HB |
953 | return r; |
954 | } | |
955 | ||
043cc4d7 SW |
956 | static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)]; |
957 | static unsigned long nr_lpids; | |
958 | ||
959 | long kvmppc_alloc_lpid(void) | |
960 | { | |
961 | long lpid; | |
962 | ||
963 | do { | |
964 | lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS); | |
965 | if (lpid >= nr_lpids) { | |
966 | pr_err("%s: No LPIDs free\n", __func__); | |
967 | return -ENOMEM; | |
968 | } | |
969 | } while (test_and_set_bit(lpid, lpid_inuse)); | |
970 | ||
971 | return lpid; | |
972 | } | |
973 | ||
974 | void kvmppc_claim_lpid(long lpid) | |
975 | { | |
976 | set_bit(lpid, lpid_inuse); | |
977 | } | |
978 | ||
979 | void kvmppc_free_lpid(long lpid) | |
980 | { | |
981 | clear_bit(lpid, lpid_inuse); | |
982 | } | |
983 | ||
984 | void kvmppc_init_lpid(unsigned long nr_lpids_param) | |
985 | { | |
986 | nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param); | |
987 | memset(lpid_inuse, 0, sizeof(lpid_inuse)); | |
988 | } | |
989 | ||
bbf45ba5 HB |
990 | int kvm_arch_init(void *opaque) |
991 | { | |
992 | return 0; | |
993 | } | |
994 | ||
995 | void kvm_arch_exit(void) | |
996 | { | |
997 | } |