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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> | |
24 | #include <linux/vmalloc.h> | |
25 | #include <linux/hrtimer.h> | |
26 | #include <linux/fs.h> | |
27 | #include <linux/slab.h> | |
28 | #include <asm/cputable.h> | |
29 | #include <asm/uaccess.h> | |
30 | #include <asm/kvm_ppc.h> | |
31 | #include <asm/tlbflush.h> | |
32 | #include <asm/cputhreads.h> | |
33 | #include "timing.h" | |
34 | #include "../mm/mmu_decl.h" | |
35 | ||
36 | #define CREATE_TRACE_POINTS | |
37 | #include "trace.h" | |
38 | ||
39 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) | |
40 | { | |
41 | return !(v->arch.shared->msr & MSR_WE) || | |
42 | !!(v->arch.pending_exceptions) || | |
43 | v->requests; | |
44 | } | |
45 | ||
46 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) | |
47 | { | |
48 | return 1; | |
49 | } | |
50 | ||
51 | int kvmppc_kvm_pv(struct kvm_vcpu *vcpu) | |
52 | { | |
53 | int nr = kvmppc_get_gpr(vcpu, 11); | |
54 | int r; | |
55 | unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3); | |
56 | unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4); | |
57 | unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5); | |
58 | unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6); | |
59 | unsigned long r2 = 0; | |
60 | ||
61 | if (!(vcpu->arch.shared->msr & MSR_SF)) { | |
62 | /* 32 bit mode */ | |
63 | param1 &= 0xffffffff; | |
64 | param2 &= 0xffffffff; | |
65 | param3 &= 0xffffffff; | |
66 | param4 &= 0xffffffff; | |
67 | } | |
68 | ||
69 | switch (nr) { | |
70 | case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE: | |
71 | { | |
72 | vcpu->arch.magic_page_pa = param1; | |
73 | vcpu->arch.magic_page_ea = param2; | |
74 | ||
75 | r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7; | |
76 | ||
77 | r = HC_EV_SUCCESS; | |
78 | break; | |
79 | } | |
80 | case HC_VENDOR_KVM | KVM_HC_FEATURES: | |
81 | r = HC_EV_SUCCESS; | |
82 | #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2) | |
83 | /* XXX Missing magic page on 44x */ | |
84 | r2 |= (1 << KVM_FEATURE_MAGIC_PAGE); | |
85 | #endif | |
86 | ||
87 | /* Second return value is in r4 */ | |
88 | break; | |
89 | default: | |
90 | r = HC_EV_UNIMPLEMENTED; | |
91 | break; | |
92 | } | |
93 | ||
94 | kvmppc_set_gpr(vcpu, 4, r2); | |
95 | ||
96 | return r; | |
97 | } | |
98 | ||
99 | int kvmppc_sanity_check(struct kvm_vcpu *vcpu) | |
100 | { | |
101 | int r = false; | |
102 | ||
103 | /* We have to know what CPU to virtualize */ | |
104 | if (!vcpu->arch.pvr) | |
105 | goto out; | |
106 | ||
107 | /* PAPR only works with book3s_64 */ | |
108 | if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled) | |
109 | goto out; | |
110 | ||
111 | #ifdef CONFIG_KVM_BOOK3S_64_HV | |
112 | /* HV KVM can only do PAPR mode for now */ | |
113 | if (!vcpu->arch.papr_enabled) | |
114 | goto out; | |
115 | #endif | |
116 | ||
117 | #ifdef CONFIG_KVM_BOOKE_HV | |
118 | if (!cpu_has_feature(CPU_FTR_EMB_HV)) | |
119 | goto out; | |
120 | #endif | |
121 | ||
122 | r = true; | |
123 | ||
124 | out: | |
125 | vcpu->arch.sane = r; | |
126 | return r ? 0 : -EINVAL; | |
127 | } | |
128 | ||
129 | int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu) | |
130 | { | |
131 | enum emulation_result er; | |
132 | int r; | |
133 | ||
134 | er = kvmppc_emulate_instruction(run, vcpu); | |
135 | switch (er) { | |
136 | case EMULATE_DONE: | |
137 | /* Future optimization: only reload non-volatiles if they were | |
138 | * actually modified. */ | |
139 | r = RESUME_GUEST_NV; | |
140 | break; | |
141 | case EMULATE_DO_MMIO: | |
142 | run->exit_reason = KVM_EXIT_MMIO; | |
143 | /* We must reload nonvolatiles because "update" load/store | |
144 | * instructions modify register state. */ | |
145 | /* Future optimization: only reload non-volatiles if they were | |
146 | * actually modified. */ | |
147 | r = RESUME_HOST_NV; | |
148 | break; | |
149 | case EMULATE_FAIL: | |
150 | /* XXX Deliver Program interrupt to guest. */ | |
151 | printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__, | |
152 | kvmppc_get_last_inst(vcpu)); | |
153 | r = RESUME_HOST; | |
154 | break; | |
155 | default: | |
156 | BUG(); | |
157 | } | |
158 | ||
159 | return r; | |
160 | } | |
161 | ||
162 | int kvm_arch_hardware_enable(void *garbage) | |
163 | { | |
164 | return 0; | |
165 | } | |
166 | ||
167 | void kvm_arch_hardware_disable(void *garbage) | |
168 | { | |
169 | } | |
170 | ||
171 | int kvm_arch_hardware_setup(void) | |
172 | { | |
173 | return 0; | |
174 | } | |
175 | ||
176 | void kvm_arch_hardware_unsetup(void) | |
177 | { | |
178 | } | |
179 | ||
180 | void kvm_arch_check_processor_compat(void *rtn) | |
181 | { | |
182 | *(int *)rtn = kvmppc_core_check_processor_compat(); | |
183 | } | |
184 | ||
185 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) | |
186 | { | |
187 | if (type) | |
188 | return -EINVAL; | |
189 | ||
190 | return kvmppc_core_init_vm(kvm); | |
191 | } | |
192 | ||
193 | void kvm_arch_destroy_vm(struct kvm *kvm) | |
194 | { | |
195 | unsigned int i; | |
196 | struct kvm_vcpu *vcpu; | |
197 | ||
198 | kvm_for_each_vcpu(i, vcpu, kvm) | |
199 | kvm_arch_vcpu_free(vcpu); | |
200 | ||
201 | mutex_lock(&kvm->lock); | |
202 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
203 | kvm->vcpus[i] = NULL; | |
204 | ||
205 | atomic_set(&kvm->online_vcpus, 0); | |
206 | ||
207 | kvmppc_core_destroy_vm(kvm); | |
208 | ||
209 | mutex_unlock(&kvm->lock); | |
210 | } | |
211 | ||
212 | void kvm_arch_sync_events(struct kvm *kvm) | |
213 | { | |
214 | } | |
215 | ||
216 | int kvm_dev_ioctl_check_extension(long ext) | |
217 | { | |
218 | int r; | |
219 | ||
220 | switch (ext) { | |
221 | #ifdef CONFIG_BOOKE | |
222 | case KVM_CAP_PPC_BOOKE_SREGS: | |
223 | #else | |
224 | case KVM_CAP_PPC_SEGSTATE: | |
225 | case KVM_CAP_PPC_HIOR: | |
226 | case KVM_CAP_PPC_PAPR: | |
227 | #endif | |
228 | case KVM_CAP_PPC_UNSET_IRQ: | |
229 | case KVM_CAP_PPC_IRQ_LEVEL: | |
230 | case KVM_CAP_ENABLE_CAP: | |
231 | case KVM_CAP_ONE_REG: | |
232 | r = 1; | |
233 | break; | |
234 | #ifndef CONFIG_KVM_BOOK3S_64_HV | |
235 | case KVM_CAP_PPC_PAIRED_SINGLES: | |
236 | case KVM_CAP_PPC_OSI: | |
237 | case KVM_CAP_PPC_GET_PVINFO: | |
238 | #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) | |
239 | case KVM_CAP_SW_TLB: | |
240 | #endif | |
241 | r = 1; | |
242 | break; | |
243 | case KVM_CAP_COALESCED_MMIO: | |
244 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
245 | break; | |
246 | #endif | |
247 | #ifdef CONFIG_PPC_BOOK3S_64 | |
248 | case KVM_CAP_SPAPR_TCE: | |
249 | r = 1; | |
250 | break; | |
251 | #endif /* CONFIG_PPC_BOOK3S_64 */ | |
252 | #ifdef CONFIG_KVM_BOOK3S_64_HV | |
253 | case KVM_CAP_PPC_SMT: | |
254 | r = threads_per_core; | |
255 | break; | |
256 | case KVM_CAP_PPC_RMA: | |
257 | r = 1; | |
258 | /* PPC970 requires an RMA */ | |
259 | if (cpu_has_feature(CPU_FTR_ARCH_201)) | |
260 | r = 2; | |
261 | break; | |
262 | case KVM_CAP_SYNC_MMU: | |
263 | r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0; | |
264 | break; | |
265 | #endif | |
266 | case KVM_CAP_NR_VCPUS: | |
267 | /* | |
268 | * Recommending a number of CPUs is somewhat arbitrary; we | |
269 | * return the number of present CPUs for -HV (since a host | |
270 | * will have secondary threads "offline"), and for other KVM | |
271 | * implementations just count online CPUs. | |
272 | */ | |
273 | #ifdef CONFIG_KVM_BOOK3S_64_HV | |
274 | r = num_present_cpus(); | |
275 | #else | |
276 | r = num_online_cpus(); | |
277 | #endif | |
278 | break; | |
279 | case KVM_CAP_MAX_VCPUS: | |
280 | r = KVM_MAX_VCPUS; | |
281 | break; | |
282 | #ifdef CONFIG_PPC_BOOK3S_64 | |
283 | case KVM_CAP_PPC_GET_SMMU_INFO: | |
284 | r = 1; | |
285 | break; | |
286 | #endif | |
287 | default: | |
288 | r = 0; | |
289 | break; | |
290 | } | |
291 | return r; | |
292 | ||
293 | } | |
294 | ||
295 | long kvm_arch_dev_ioctl(struct file *filp, | |
296 | unsigned int ioctl, unsigned long arg) | |
297 | { | |
298 | return -EINVAL; | |
299 | } | |
300 | ||
301 | void kvm_arch_free_memslot(struct kvm_memory_slot *free, | |
302 | struct kvm_memory_slot *dont) | |
303 | { | |
304 | } | |
305 | ||
306 | int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages) | |
307 | { | |
308 | return 0; | |
309 | } | |
310 | ||
311 | int kvm_arch_prepare_memory_region(struct kvm *kvm, | |
312 | struct kvm_memory_slot *memslot, | |
313 | struct kvm_memory_slot old, | |
314 | struct kvm_userspace_memory_region *mem, | |
315 | int user_alloc) | |
316 | { | |
317 | return kvmppc_core_prepare_memory_region(kvm, mem); | |
318 | } | |
319 | ||
320 | void kvm_arch_commit_memory_region(struct kvm *kvm, | |
321 | struct kvm_userspace_memory_region *mem, | |
322 | struct kvm_memory_slot old, | |
323 | int user_alloc) | |
324 | { | |
325 | kvmppc_core_commit_memory_region(kvm, mem); | |
326 | } | |
327 | ||
328 | ||
329 | void kvm_arch_flush_shadow(struct kvm *kvm) | |
330 | { | |
331 | } | |
332 | ||
333 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) | |
334 | { | |
335 | struct kvm_vcpu *vcpu; | |
336 | vcpu = kvmppc_core_vcpu_create(kvm, id); | |
337 | if (!IS_ERR(vcpu)) { | |
338 | vcpu->arch.wqp = &vcpu->wq; | |
339 | kvmppc_create_vcpu_debugfs(vcpu, id); | |
340 | } | |
341 | return vcpu; | |
342 | } | |
343 | ||
344 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
345 | { | |
346 | /* Make sure we're not using the vcpu anymore */ | |
347 | hrtimer_cancel(&vcpu->arch.dec_timer); | |
348 | tasklet_kill(&vcpu->arch.tasklet); | |
349 | ||
350 | kvmppc_remove_vcpu_debugfs(vcpu); | |
351 | kvmppc_core_vcpu_free(vcpu); | |
352 | } | |
353 | ||
354 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) | |
355 | { | |
356 | kvm_arch_vcpu_free(vcpu); | |
357 | } | |
358 | ||
359 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) | |
360 | { | |
361 | return kvmppc_core_pending_dec(vcpu); | |
362 | } | |
363 | ||
364 | /* | |
365 | * low level hrtimer wake routine. Because this runs in hardirq context | |
366 | * we schedule a tasklet to do the real work. | |
367 | */ | |
368 | enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer) | |
369 | { | |
370 | struct kvm_vcpu *vcpu; | |
371 | ||
372 | vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer); | |
373 | tasklet_schedule(&vcpu->arch.tasklet); | |
374 | ||
375 | return HRTIMER_NORESTART; | |
376 | } | |
377 | ||
378 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
379 | { | |
380 | hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS); | |
381 | tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu); | |
382 | vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup; | |
383 | vcpu->arch.dec_expires = ~(u64)0; | |
384 | ||
385 | #ifdef CONFIG_KVM_EXIT_TIMING | |
386 | mutex_init(&vcpu->arch.exit_timing_lock); | |
387 | #endif | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
393 | { | |
394 | kvmppc_mmu_destroy(vcpu); | |
395 | } | |
396 | ||
397 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
398 | { | |
399 | #ifdef CONFIG_BOOKE | |
400 | /* | |
401 | * vrsave (formerly usprg0) isn't used by Linux, but may | |
402 | * be used by the guest. | |
403 | * | |
404 | * On non-booke this is associated with Altivec and | |
405 | * is handled by code in book3s.c. | |
406 | */ | |
407 | mtspr(SPRN_VRSAVE, vcpu->arch.vrsave); | |
408 | #endif | |
409 | kvmppc_core_vcpu_load(vcpu, cpu); | |
410 | vcpu->cpu = smp_processor_id(); | |
411 | } | |
412 | ||
413 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
414 | { | |
415 | kvmppc_core_vcpu_put(vcpu); | |
416 | #ifdef CONFIG_BOOKE | |
417 | vcpu->arch.vrsave = mfspr(SPRN_VRSAVE); | |
418 | #endif | |
419 | vcpu->cpu = -1; | |
420 | } | |
421 | ||
422 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, | |
423 | struct kvm_guest_debug *dbg) | |
424 | { | |
425 | return -EINVAL; | |
426 | } | |
427 | ||
428 | static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu, | |
429 | struct kvm_run *run) | |
430 | { | |
431 | kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data); | |
432 | } | |
433 | ||
434 | static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu, | |
435 | struct kvm_run *run) | |
436 | { | |
437 | u64 uninitialized_var(gpr); | |
438 | ||
439 | if (run->mmio.len > sizeof(gpr)) { | |
440 | printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len); | |
441 | return; | |
442 | } | |
443 | ||
444 | if (vcpu->arch.mmio_is_bigendian) { | |
445 | switch (run->mmio.len) { | |
446 | case 8: gpr = *(u64 *)run->mmio.data; break; | |
447 | case 4: gpr = *(u32 *)run->mmio.data; break; | |
448 | case 2: gpr = *(u16 *)run->mmio.data; break; | |
449 | case 1: gpr = *(u8 *)run->mmio.data; break; | |
450 | } | |
451 | } else { | |
452 | /* Convert BE data from userland back to LE. */ | |
453 | switch (run->mmio.len) { | |
454 | case 4: gpr = ld_le32((u32 *)run->mmio.data); break; | |
455 | case 2: gpr = ld_le16((u16 *)run->mmio.data); break; | |
456 | case 1: gpr = *(u8 *)run->mmio.data; break; | |
457 | } | |
458 | } | |
459 | ||
460 | if (vcpu->arch.mmio_sign_extend) { | |
461 | switch (run->mmio.len) { | |
462 | #ifdef CONFIG_PPC64 | |
463 | case 4: | |
464 | gpr = (s64)(s32)gpr; | |
465 | break; | |
466 | #endif | |
467 | case 2: | |
468 | gpr = (s64)(s16)gpr; | |
469 | break; | |
470 | case 1: | |
471 | gpr = (s64)(s8)gpr; | |
472 | break; | |
473 | } | |
474 | } | |
475 | ||
476 | kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr); | |
477 | ||
478 | switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) { | |
479 | case KVM_MMIO_REG_GPR: | |
480 | kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr); | |
481 | break; | |
482 | case KVM_MMIO_REG_FPR: | |
483 | vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; | |
484 | break; | |
485 | #ifdef CONFIG_PPC_BOOK3S | |
486 | case KVM_MMIO_REG_QPR: | |
487 | vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; | |
488 | break; | |
489 | case KVM_MMIO_REG_FQPR: | |
490 | vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; | |
491 | vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr; | |
492 | break; | |
493 | #endif | |
494 | default: | |
495 | BUG(); | |
496 | } | |
497 | } | |
498 | ||
499 | int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
500 | unsigned int rt, unsigned int bytes, int is_bigendian) | |
501 | { | |
502 | if (bytes > sizeof(run->mmio.data)) { | |
503 | printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, | |
504 | run->mmio.len); | |
505 | } | |
506 | ||
507 | run->mmio.phys_addr = vcpu->arch.paddr_accessed; | |
508 | run->mmio.len = bytes; | |
509 | run->mmio.is_write = 0; | |
510 | ||
511 | vcpu->arch.io_gpr = rt; | |
512 | vcpu->arch.mmio_is_bigendian = is_bigendian; | |
513 | vcpu->mmio_needed = 1; | |
514 | vcpu->mmio_is_write = 0; | |
515 | vcpu->arch.mmio_sign_extend = 0; | |
516 | ||
517 | return EMULATE_DO_MMIO; | |
518 | } | |
519 | ||
520 | /* Same as above, but sign extends */ | |
521 | int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
522 | unsigned int rt, unsigned int bytes, int is_bigendian) | |
523 | { | |
524 | int r; | |
525 | ||
526 | r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian); | |
527 | vcpu->arch.mmio_sign_extend = 1; | |
528 | ||
529 | return r; | |
530 | } | |
531 | ||
532 | int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
533 | u64 val, unsigned int bytes, int is_bigendian) | |
534 | { | |
535 | void *data = run->mmio.data; | |
536 | ||
537 | if (bytes > sizeof(run->mmio.data)) { | |
538 | printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__, | |
539 | run->mmio.len); | |
540 | } | |
541 | ||
542 | run->mmio.phys_addr = vcpu->arch.paddr_accessed; | |
543 | run->mmio.len = bytes; | |
544 | run->mmio.is_write = 1; | |
545 | vcpu->mmio_needed = 1; | |
546 | vcpu->mmio_is_write = 1; | |
547 | ||
548 | /* Store the value at the lowest bytes in 'data'. */ | |
549 | if (is_bigendian) { | |
550 | switch (bytes) { | |
551 | case 8: *(u64 *)data = val; break; | |
552 | case 4: *(u32 *)data = val; break; | |
553 | case 2: *(u16 *)data = val; break; | |
554 | case 1: *(u8 *)data = val; break; | |
555 | } | |
556 | } else { | |
557 | /* Store LE value into 'data'. */ | |
558 | switch (bytes) { | |
559 | case 4: st_le32(data, val); break; | |
560 | case 2: st_le16(data, val); break; | |
561 | case 1: *(u8 *)data = val; break; | |
562 | } | |
563 | } | |
564 | ||
565 | return EMULATE_DO_MMIO; | |
566 | } | |
567 | ||
568 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) | |
569 | { | |
570 | int r; | |
571 | sigset_t sigsaved; | |
572 | ||
573 | if (vcpu->sigset_active) | |
574 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
575 | ||
576 | if (vcpu->mmio_needed) { | |
577 | if (!vcpu->mmio_is_write) | |
578 | kvmppc_complete_mmio_load(vcpu, run); | |
579 | vcpu->mmio_needed = 0; | |
580 | } else if (vcpu->arch.dcr_needed) { | |
581 | if (!vcpu->arch.dcr_is_write) | |
582 | kvmppc_complete_dcr_load(vcpu, run); | |
583 | vcpu->arch.dcr_needed = 0; | |
584 | } else if (vcpu->arch.osi_needed) { | |
585 | u64 *gprs = run->osi.gprs; | |
586 | int i; | |
587 | ||
588 | for (i = 0; i < 32; i++) | |
589 | kvmppc_set_gpr(vcpu, i, gprs[i]); | |
590 | vcpu->arch.osi_needed = 0; | |
591 | } else if (vcpu->arch.hcall_needed) { | |
592 | int i; | |
593 | ||
594 | kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret); | |
595 | for (i = 0; i < 9; ++i) | |
596 | kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]); | |
597 | vcpu->arch.hcall_needed = 0; | |
598 | } | |
599 | ||
600 | r = kvmppc_vcpu_run(run, vcpu); | |
601 | ||
602 | if (vcpu->sigset_active) | |
603 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
604 | ||
605 | return r; | |
606 | } | |
607 | ||
608 | int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq) | |
609 | { | |
610 | if (irq->irq == KVM_INTERRUPT_UNSET) { | |
611 | kvmppc_core_dequeue_external(vcpu, irq); | |
612 | return 0; | |
613 | } | |
614 | ||
615 | kvmppc_core_queue_external(vcpu, irq); | |
616 | ||
617 | kvm_vcpu_kick(vcpu); | |
618 | ||
619 | return 0; | |
620 | } | |
621 | ||
622 | static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu, | |
623 | struct kvm_enable_cap *cap) | |
624 | { | |
625 | int r; | |
626 | ||
627 | if (cap->flags) | |
628 | return -EINVAL; | |
629 | ||
630 | switch (cap->cap) { | |
631 | case KVM_CAP_PPC_OSI: | |
632 | r = 0; | |
633 | vcpu->arch.osi_enabled = true; | |
634 | break; | |
635 | case KVM_CAP_PPC_PAPR: | |
636 | r = 0; | |
637 | vcpu->arch.papr_enabled = true; | |
638 | break; | |
639 | #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) | |
640 | case KVM_CAP_SW_TLB: { | |
641 | struct kvm_config_tlb cfg; | |
642 | void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0]; | |
643 | ||
644 | r = -EFAULT; | |
645 | if (copy_from_user(&cfg, user_ptr, sizeof(cfg))) | |
646 | break; | |
647 | ||
648 | r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg); | |
649 | break; | |
650 | } | |
651 | #endif | |
652 | default: | |
653 | r = -EINVAL; | |
654 | break; | |
655 | } | |
656 | ||
657 | if (!r) | |
658 | r = kvmppc_sanity_check(vcpu); | |
659 | ||
660 | return r; | |
661 | } | |
662 | ||
663 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, | |
664 | struct kvm_mp_state *mp_state) | |
665 | { | |
666 | return -EINVAL; | |
667 | } | |
668 | ||
669 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
670 | struct kvm_mp_state *mp_state) | |
671 | { | |
672 | return -EINVAL; | |
673 | } | |
674 | ||
675 | long kvm_arch_vcpu_ioctl(struct file *filp, | |
676 | unsigned int ioctl, unsigned long arg) | |
677 | { | |
678 | struct kvm_vcpu *vcpu = filp->private_data; | |
679 | void __user *argp = (void __user *)arg; | |
680 | long r; | |
681 | ||
682 | switch (ioctl) { | |
683 | case KVM_INTERRUPT: { | |
684 | struct kvm_interrupt irq; | |
685 | r = -EFAULT; | |
686 | if (copy_from_user(&irq, argp, sizeof(irq))) | |
687 | goto out; | |
688 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
689 | goto out; | |
690 | } | |
691 | ||
692 | case KVM_ENABLE_CAP: | |
693 | { | |
694 | struct kvm_enable_cap cap; | |
695 | r = -EFAULT; | |
696 | if (copy_from_user(&cap, argp, sizeof(cap))) | |
697 | goto out; | |
698 | r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap); | |
699 | break; | |
700 | } | |
701 | ||
702 | case KVM_SET_ONE_REG: | |
703 | case KVM_GET_ONE_REG: | |
704 | { | |
705 | struct kvm_one_reg reg; | |
706 | r = -EFAULT; | |
707 | if (copy_from_user(®, argp, sizeof(reg))) | |
708 | goto out; | |
709 | if (ioctl == KVM_SET_ONE_REG) | |
710 | r = kvm_vcpu_ioctl_set_one_reg(vcpu, ®); | |
711 | else | |
712 | r = kvm_vcpu_ioctl_get_one_reg(vcpu, ®); | |
713 | break; | |
714 | } | |
715 | ||
716 | #if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC) | |
717 | case KVM_DIRTY_TLB: { | |
718 | struct kvm_dirty_tlb dirty; | |
719 | r = -EFAULT; | |
720 | if (copy_from_user(&dirty, argp, sizeof(dirty))) | |
721 | goto out; | |
722 | r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty); | |
723 | break; | |
724 | } | |
725 | #endif | |
726 | default: | |
727 | r = -EINVAL; | |
728 | } | |
729 | ||
730 | out: | |
731 | return r; | |
732 | } | |
733 | ||
734 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) | |
735 | { | |
736 | return VM_FAULT_SIGBUS; | |
737 | } | |
738 | ||
739 | static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo) | |
740 | { | |
741 | u32 inst_lis = 0x3c000000; | |
742 | u32 inst_ori = 0x60000000; | |
743 | u32 inst_nop = 0x60000000; | |
744 | u32 inst_sc = 0x44000002; | |
745 | u32 inst_imm_mask = 0xffff; | |
746 | ||
747 | /* | |
748 | * The hypercall to get into KVM from within guest context is as | |
749 | * follows: | |
750 | * | |
751 | * lis r0, r0, KVM_SC_MAGIC_R0@h | |
752 | * ori r0, KVM_SC_MAGIC_R0@l | |
753 | * sc | |
754 | * nop | |
755 | */ | |
756 | pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask); | |
757 | pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask); | |
758 | pvinfo->hcall[2] = inst_sc; | |
759 | pvinfo->hcall[3] = inst_nop; | |
760 | ||
761 | return 0; | |
762 | } | |
763 | ||
764 | long kvm_arch_vm_ioctl(struct file *filp, | |
765 | unsigned int ioctl, unsigned long arg) | |
766 | { | |
767 | void __user *argp = (void __user *)arg; | |
768 | long r; | |
769 | ||
770 | switch (ioctl) { | |
771 | case KVM_PPC_GET_PVINFO: { | |
772 | struct kvm_ppc_pvinfo pvinfo; | |
773 | memset(&pvinfo, 0, sizeof(pvinfo)); | |
774 | r = kvm_vm_ioctl_get_pvinfo(&pvinfo); | |
775 | if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) { | |
776 | r = -EFAULT; | |
777 | goto out; | |
778 | } | |
779 | ||
780 | break; | |
781 | } | |
782 | #ifdef CONFIG_PPC_BOOK3S_64 | |
783 | case KVM_CREATE_SPAPR_TCE: { | |
784 | struct kvm_create_spapr_tce create_tce; | |
785 | struct kvm *kvm = filp->private_data; | |
786 | ||
787 | r = -EFAULT; | |
788 | if (copy_from_user(&create_tce, argp, sizeof(create_tce))) | |
789 | goto out; | |
790 | r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce); | |
791 | goto out; | |
792 | } | |
793 | #endif /* CONFIG_PPC_BOOK3S_64 */ | |
794 | ||
795 | #ifdef CONFIG_KVM_BOOK3S_64_HV | |
796 | case KVM_ALLOCATE_RMA: { | |
797 | struct kvm *kvm = filp->private_data; | |
798 | struct kvm_allocate_rma rma; | |
799 | ||
800 | r = kvm_vm_ioctl_allocate_rma(kvm, &rma); | |
801 | if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma))) | |
802 | r = -EFAULT; | |
803 | break; | |
804 | } | |
805 | #endif /* CONFIG_KVM_BOOK3S_64_HV */ | |
806 | ||
807 | #ifdef CONFIG_PPC_BOOK3S_64 | |
808 | case KVM_PPC_GET_SMMU_INFO: { | |
809 | struct kvm *kvm = filp->private_data; | |
810 | struct kvm_ppc_smmu_info info; | |
811 | ||
812 | memset(&info, 0, sizeof(info)); | |
813 | r = kvm_vm_ioctl_get_smmu_info(kvm, &info); | |
814 | if (r >= 0 && copy_to_user(argp, &info, sizeof(info))) | |
815 | r = -EFAULT; | |
816 | break; | |
817 | } | |
818 | #endif /* CONFIG_PPC_BOOK3S_64 */ | |
819 | default: | |
820 | r = -ENOTTY; | |
821 | } | |
822 | ||
823 | out: | |
824 | return r; | |
825 | } | |
826 | ||
827 | static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)]; | |
828 | static unsigned long nr_lpids; | |
829 | ||
830 | long kvmppc_alloc_lpid(void) | |
831 | { | |
832 | long lpid; | |
833 | ||
834 | do { | |
835 | lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS); | |
836 | if (lpid >= nr_lpids) { | |
837 | pr_err("%s: No LPIDs free\n", __func__); | |
838 | return -ENOMEM; | |
839 | } | |
840 | } while (test_and_set_bit(lpid, lpid_inuse)); | |
841 | ||
842 | return lpid; | |
843 | } | |
844 | ||
845 | void kvmppc_claim_lpid(long lpid) | |
846 | { | |
847 | set_bit(lpid, lpid_inuse); | |
848 | } | |
849 | ||
850 | void kvmppc_free_lpid(long lpid) | |
851 | { | |
852 | clear_bit(lpid, lpid_inuse); | |
853 | } | |
854 | ||
855 | void kvmppc_init_lpid(unsigned long nr_lpids_param) | |
856 | { | |
857 | nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param); | |
858 | memset(lpid_inuse, 0, sizeof(lpid_inuse)); | |
859 | } | |
860 | ||
861 | int kvm_arch_init(void *opaque) | |
862 | { | |
863 | return 0; | |
864 | } | |
865 | ||
866 | void kvm_arch_exit(void) | |
867 | { | |
868 | } |