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
kvm_arch_vcpu_runnable(struct kvm_vcpu * v)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
kvmppc_kvm_pv(struct kvm_vcpu * vcpu)46 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
47 {
48 int nr = kvmppc_get_gpr(vcpu, 11);
49 int r;
50 unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
51 unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
52 unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
53 unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
54 unsigned long r2 = 0;
55
56 if (!(vcpu->arch.shared->msr & MSR_SF)) {
57 /* 32 bit mode */
58 param1 &= 0xffffffff;
59 param2 &= 0xffffffff;
60 param3 &= 0xffffffff;
61 param4 &= 0xffffffff;
62 }
63
64 switch (nr) {
65 case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE:
66 {
67 vcpu->arch.magic_page_pa = param1;
68 vcpu->arch.magic_page_ea = param2;
69
70 r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
71
72 r = HC_EV_SUCCESS;
73 break;
74 }
75 case HC_VENDOR_KVM | KVM_HC_FEATURES:
76 r = HC_EV_SUCCESS;
77 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500)
78 /* XXX Missing magic page on 44x */
79 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
80 #endif
81
82 /* Second return value is in r4 */
83 break;
84 default:
85 r = HC_EV_UNIMPLEMENTED;
86 break;
87 }
88
89 kvmppc_set_gpr(vcpu, 4, r2);
90
91 return r;
92 }
93
kvmppc_sanity_check(struct kvm_vcpu * vcpu)94 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
95 {
96 int r = false;
97
98 /* We have to know what CPU to virtualize */
99 if (!vcpu->arch.pvr)
100 goto out;
101
102 /* PAPR only works with book3s_64 */
103 if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
104 goto out;
105
106 #ifdef CONFIG_KVM_BOOK3S_64_HV
107 /* HV KVM can only do PAPR mode for now */
108 if (!vcpu->arch.papr_enabled)
109 goto out;
110 #endif
111
112 r = true;
113
114 out:
115 vcpu->arch.sane = r;
116 return r ? 0 : -EINVAL;
117 }
118
kvmppc_emulate_mmio(struct kvm_run * run,struct kvm_vcpu * vcpu)119 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
120 {
121 enum emulation_result er;
122 int r;
123
124 er = kvmppc_emulate_instruction(run, vcpu);
125 switch (er) {
126 case EMULATE_DONE:
127 /* Future optimization: only reload non-volatiles if they were
128 * actually modified. */
129 r = RESUME_GUEST_NV;
130 break;
131 case EMULATE_DO_MMIO:
132 run->exit_reason = KVM_EXIT_MMIO;
133 /* We must reload nonvolatiles because "update" load/store
134 * instructions modify register state. */
135 /* Future optimization: only reload non-volatiles if they were
136 * actually modified. */
137 r = RESUME_HOST_NV;
138 break;
139 case EMULATE_FAIL:
140 /* XXX Deliver Program interrupt to guest. */
141 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
142 kvmppc_get_last_inst(vcpu));
143 r = RESUME_HOST;
144 break;
145 default:
146 BUG();
147 }
148
149 return r;
150 }
151
kvm_arch_hardware_enable(void * garbage)152 int kvm_arch_hardware_enable(void *garbage)
153 {
154 return 0;
155 }
156
kvm_arch_hardware_disable(void * garbage)157 void kvm_arch_hardware_disable(void *garbage)
158 {
159 }
160
kvm_arch_hardware_setup(void)161 int kvm_arch_hardware_setup(void)
162 {
163 return 0;
164 }
165
kvm_arch_hardware_unsetup(void)166 void kvm_arch_hardware_unsetup(void)
167 {
168 }
169
kvm_arch_check_processor_compat(void * rtn)170 void kvm_arch_check_processor_compat(void *rtn)
171 {
172 *(int *)rtn = kvmppc_core_check_processor_compat();
173 }
174
kvm_arch_init_vm(struct kvm * kvm,unsigned long type)175 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
176 {
177 if (type)
178 return -EINVAL;
179
180 return kvmppc_core_init_vm(kvm);
181 }
182
kvm_arch_destroy_vm(struct kvm * kvm)183 void kvm_arch_destroy_vm(struct kvm *kvm)
184 {
185 unsigned int i;
186 struct kvm_vcpu *vcpu;
187
188 kvm_for_each_vcpu(i, vcpu, kvm)
189 kvm_arch_vcpu_free(vcpu);
190
191 mutex_lock(&kvm->lock);
192 for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
193 kvm->vcpus[i] = NULL;
194
195 atomic_set(&kvm->online_vcpus, 0);
196
197 kvmppc_core_destroy_vm(kvm);
198
199 mutex_unlock(&kvm->lock);
200 }
201
kvm_arch_sync_events(struct kvm * kvm)202 void kvm_arch_sync_events(struct kvm *kvm)
203 {
204 }
205
kvm_dev_ioctl_check_extension(long ext)206 int kvm_dev_ioctl_check_extension(long ext)
207 {
208 int r;
209
210 switch (ext) {
211 #ifdef CONFIG_BOOKE
212 case KVM_CAP_PPC_BOOKE_SREGS:
213 #else
214 case KVM_CAP_PPC_SEGSTATE:
215 case KVM_CAP_PPC_HIOR:
216 case KVM_CAP_PPC_PAPR:
217 #endif
218 case KVM_CAP_PPC_UNSET_IRQ:
219 case KVM_CAP_PPC_IRQ_LEVEL:
220 case KVM_CAP_ENABLE_CAP:
221 case KVM_CAP_ONE_REG:
222 r = 1;
223 break;
224 #ifndef CONFIG_KVM_BOOK3S_64_HV
225 case KVM_CAP_PPC_PAIRED_SINGLES:
226 case KVM_CAP_PPC_OSI:
227 case KVM_CAP_PPC_GET_PVINFO:
228 #ifdef CONFIG_KVM_E500
229 case KVM_CAP_SW_TLB:
230 #endif
231 r = 1;
232 break;
233 case KVM_CAP_COALESCED_MMIO:
234 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
235 break;
236 #endif
237 #ifdef CONFIG_KVM_BOOK3S_64_HV
238 case KVM_CAP_SPAPR_TCE:
239 r = 1;
240 break;
241 case KVM_CAP_PPC_SMT:
242 r = threads_per_core;
243 break;
244 case KVM_CAP_PPC_RMA:
245 r = 1;
246 /* PPC970 requires an RMA */
247 if (cpu_has_feature(CPU_FTR_ARCH_201))
248 r = 2;
249 break;
250 case KVM_CAP_SYNC_MMU:
251 r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
252 break;
253 #endif
254 case KVM_CAP_NR_VCPUS:
255 /*
256 * Recommending a number of CPUs is somewhat arbitrary; we
257 * return the number of present CPUs for -HV (since a host
258 * will have secondary threads "offline"), and for other KVM
259 * implementations just count online CPUs.
260 */
261 #ifdef CONFIG_KVM_BOOK3S_64_HV
262 r = num_present_cpus();
263 #else
264 r = num_online_cpus();
265 #endif
266 break;
267 case KVM_CAP_MAX_VCPUS:
268 r = KVM_MAX_VCPUS;
269 break;
270 default:
271 r = 0;
272 break;
273 }
274 return r;
275
276 }
277
kvm_arch_dev_ioctl(struct file * filp,unsigned int ioctl,unsigned long arg)278 long kvm_arch_dev_ioctl(struct file *filp,
279 unsigned int ioctl, unsigned long arg)
280 {
281 return -EINVAL;
282 }
283
kvm_arch_free_memslot(struct kvm_memory_slot * free,struct kvm_memory_slot * dont)284 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
285 struct kvm_memory_slot *dont)
286 {
287 }
288
kvm_arch_create_memslot(struct kvm_memory_slot * slot,unsigned long npages)289 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
290 {
291 return 0;
292 }
293
kvm_arch_prepare_memory_region(struct kvm * kvm,struct kvm_memory_slot * memslot,struct kvm_memory_slot old,struct kvm_userspace_memory_region * mem,int user_alloc)294 int kvm_arch_prepare_memory_region(struct kvm *kvm,
295 struct kvm_memory_slot *memslot,
296 struct kvm_memory_slot old,
297 struct kvm_userspace_memory_region *mem,
298 int user_alloc)
299 {
300 return kvmppc_core_prepare_memory_region(kvm, mem);
301 }
302
kvm_arch_commit_memory_region(struct kvm * kvm,struct kvm_userspace_memory_region * mem,struct kvm_memory_slot old,int user_alloc)303 void kvm_arch_commit_memory_region(struct kvm *kvm,
304 struct kvm_userspace_memory_region *mem,
305 struct kvm_memory_slot old,
306 int user_alloc)
307 {
308 kvmppc_core_commit_memory_region(kvm, mem);
309 }
310
311
kvm_arch_flush_shadow(struct kvm * kvm)312 void kvm_arch_flush_shadow(struct kvm *kvm)
313 {
314 }
315
kvm_arch_vcpu_create(struct kvm * kvm,unsigned int id)316 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
317 {
318 struct kvm_vcpu *vcpu;
319 vcpu = kvmppc_core_vcpu_create(kvm, id);
320 if (!IS_ERR(vcpu)) {
321 vcpu->arch.wqp = &vcpu->wq;
322 kvmppc_create_vcpu_debugfs(vcpu, id);
323 }
324 return vcpu;
325 }
326
kvm_arch_vcpu_free(struct kvm_vcpu * vcpu)327 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
328 {
329 /* Make sure we're not using the vcpu anymore */
330 hrtimer_cancel(&vcpu->arch.dec_timer);
331 tasklet_kill(&vcpu->arch.tasklet);
332
333 kvmppc_remove_vcpu_debugfs(vcpu);
334 kvmppc_core_vcpu_free(vcpu);
335 }
336
kvm_arch_vcpu_destroy(struct kvm_vcpu * vcpu)337 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
338 {
339 kvm_arch_vcpu_free(vcpu);
340 }
341
kvm_cpu_has_pending_timer(struct kvm_vcpu * vcpu)342 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
343 {
344 return kvmppc_core_pending_dec(vcpu);
345 }
346
347 /*
348 * low level hrtimer wake routine. Because this runs in hardirq context
349 * we schedule a tasklet to do the real work.
350 */
kvmppc_decrementer_wakeup(struct hrtimer * timer)351 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
352 {
353 struct kvm_vcpu *vcpu;
354
355 vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
356 tasklet_schedule(&vcpu->arch.tasklet);
357
358 return HRTIMER_NORESTART;
359 }
360
kvm_arch_vcpu_init(struct kvm_vcpu * vcpu)361 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
362 {
363 hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
364 tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
365 vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
366 vcpu->arch.dec_expires = ~(u64)0;
367
368 #ifdef CONFIG_KVM_EXIT_TIMING
369 mutex_init(&vcpu->arch.exit_timing_lock);
370 #endif
371
372 return 0;
373 }
374
kvm_arch_vcpu_uninit(struct kvm_vcpu * vcpu)375 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
376 {
377 kvmppc_mmu_destroy(vcpu);
378 }
379
kvm_arch_vcpu_load(struct kvm_vcpu * vcpu,int cpu)380 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
381 {
382 #ifdef CONFIG_BOOKE
383 /*
384 * vrsave (formerly usprg0) isn't used by Linux, but may
385 * be used by the guest.
386 *
387 * On non-booke this is associated with Altivec and
388 * is handled by code in book3s.c.
389 */
390 mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
391 #endif
392 kvmppc_core_vcpu_load(vcpu, cpu);
393 vcpu->cpu = smp_processor_id();
394 }
395
kvm_arch_vcpu_put(struct kvm_vcpu * vcpu)396 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
397 {
398 kvmppc_core_vcpu_put(vcpu);
399 #ifdef CONFIG_BOOKE
400 vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
401 #endif
402 vcpu->cpu = -1;
403 }
404
kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu * vcpu,struct kvm_guest_debug * dbg)405 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
406 struct kvm_guest_debug *dbg)
407 {
408 return -EINVAL;
409 }
410
kvmppc_complete_dcr_load(struct kvm_vcpu * vcpu,struct kvm_run * run)411 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
412 struct kvm_run *run)
413 {
414 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
415 }
416
kvmppc_complete_mmio_load(struct kvm_vcpu * vcpu,struct kvm_run * run)417 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
418 struct kvm_run *run)
419 {
420 u64 uninitialized_var(gpr);
421
422 if (run->mmio.len > sizeof(gpr)) {
423 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
424 return;
425 }
426
427 if (vcpu->arch.mmio_is_bigendian) {
428 switch (run->mmio.len) {
429 case 8: gpr = *(u64 *)run->mmio.data; break;
430 case 4: gpr = *(u32 *)run->mmio.data; break;
431 case 2: gpr = *(u16 *)run->mmio.data; break;
432 case 1: gpr = *(u8 *)run->mmio.data; break;
433 }
434 } else {
435 /* Convert BE data from userland back to LE. */
436 switch (run->mmio.len) {
437 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
438 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
439 case 1: gpr = *(u8 *)run->mmio.data; break;
440 }
441 }
442
443 if (vcpu->arch.mmio_sign_extend) {
444 switch (run->mmio.len) {
445 #ifdef CONFIG_PPC64
446 case 4:
447 gpr = (s64)(s32)gpr;
448 break;
449 #endif
450 case 2:
451 gpr = (s64)(s16)gpr;
452 break;
453 case 1:
454 gpr = (s64)(s8)gpr;
455 break;
456 }
457 }
458
459 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
460
461 switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
462 case KVM_MMIO_REG_GPR:
463 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
464 break;
465 case KVM_MMIO_REG_FPR:
466 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
467 break;
468 #ifdef CONFIG_PPC_BOOK3S
469 case KVM_MMIO_REG_QPR:
470 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
471 break;
472 case KVM_MMIO_REG_FQPR:
473 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
474 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
475 break;
476 #endif
477 default:
478 BUG();
479 }
480 }
481
kvmppc_handle_load(struct kvm_run * run,struct kvm_vcpu * vcpu,unsigned int rt,unsigned int bytes,int is_bigendian)482 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
483 unsigned int rt, unsigned int bytes, int is_bigendian)
484 {
485 if (bytes > sizeof(run->mmio.data)) {
486 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
487 run->mmio.len);
488 }
489
490 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
491 run->mmio.len = bytes;
492 run->mmio.is_write = 0;
493
494 vcpu->arch.io_gpr = rt;
495 vcpu->arch.mmio_is_bigendian = is_bigendian;
496 vcpu->mmio_needed = 1;
497 vcpu->mmio_is_write = 0;
498 vcpu->arch.mmio_sign_extend = 0;
499
500 return EMULATE_DO_MMIO;
501 }
502
503 /* Same as above, but sign extends */
kvmppc_handle_loads(struct kvm_run * run,struct kvm_vcpu * vcpu,unsigned int rt,unsigned int bytes,int is_bigendian)504 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
505 unsigned int rt, unsigned int bytes, int is_bigendian)
506 {
507 int r;
508
509 r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
510 vcpu->arch.mmio_sign_extend = 1;
511
512 return r;
513 }
514
kvmppc_handle_store(struct kvm_run * run,struct kvm_vcpu * vcpu,u64 val,unsigned int bytes,int is_bigendian)515 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
516 u64 val, unsigned int bytes, int is_bigendian)
517 {
518 void *data = run->mmio.data;
519
520 if (bytes > sizeof(run->mmio.data)) {
521 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
522 run->mmio.len);
523 }
524
525 run->mmio.phys_addr = vcpu->arch.paddr_accessed;
526 run->mmio.len = bytes;
527 run->mmio.is_write = 1;
528 vcpu->mmio_needed = 1;
529 vcpu->mmio_is_write = 1;
530
531 /* Store the value at the lowest bytes in 'data'. */
532 if (is_bigendian) {
533 switch (bytes) {
534 case 8: *(u64 *)data = val; break;
535 case 4: *(u32 *)data = val; break;
536 case 2: *(u16 *)data = val; break;
537 case 1: *(u8 *)data = val; break;
538 }
539 } else {
540 /* Store LE value into 'data'. */
541 switch (bytes) {
542 case 4: st_le32(data, val); break;
543 case 2: st_le16(data, val); break;
544 case 1: *(u8 *)data = val; break;
545 }
546 }
547
548 return EMULATE_DO_MMIO;
549 }
550
kvm_arch_vcpu_ioctl_run(struct kvm_vcpu * vcpu,struct kvm_run * run)551 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
552 {
553 int r;
554 sigset_t sigsaved;
555
556 if (vcpu->sigset_active)
557 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
558
559 if (vcpu->mmio_needed) {
560 if (!vcpu->mmio_is_write)
561 kvmppc_complete_mmio_load(vcpu, run);
562 vcpu->mmio_needed = 0;
563 } else if (vcpu->arch.dcr_needed) {
564 if (!vcpu->arch.dcr_is_write)
565 kvmppc_complete_dcr_load(vcpu, run);
566 vcpu->arch.dcr_needed = 0;
567 } else if (vcpu->arch.osi_needed) {
568 u64 *gprs = run->osi.gprs;
569 int i;
570
571 for (i = 0; i < 32; i++)
572 kvmppc_set_gpr(vcpu, i, gprs[i]);
573 vcpu->arch.osi_needed = 0;
574 } else if (vcpu->arch.hcall_needed) {
575 int i;
576
577 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
578 for (i = 0; i < 9; ++i)
579 kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
580 vcpu->arch.hcall_needed = 0;
581 }
582
583 r = kvmppc_vcpu_run(run, vcpu);
584
585 if (vcpu->sigset_active)
586 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
587
588 return r;
589 }
590
kvm_vcpu_kick(struct kvm_vcpu * vcpu)591 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
592 {
593 int me;
594 int cpu = vcpu->cpu;
595
596 me = get_cpu();
597 if (waitqueue_active(vcpu->arch.wqp)) {
598 wake_up_interruptible(vcpu->arch.wqp);
599 vcpu->stat.halt_wakeup++;
600 } else if (cpu != me && cpu != -1) {
601 smp_send_reschedule(vcpu->cpu);
602 }
603 put_cpu();
604 }
605
kvm_vcpu_ioctl_interrupt(struct kvm_vcpu * vcpu,struct kvm_interrupt * irq)606 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
607 {
608 if (irq->irq == KVM_INTERRUPT_UNSET) {
609 kvmppc_core_dequeue_external(vcpu, irq);
610 return 0;
611 }
612
613 kvmppc_core_queue_external(vcpu, irq);
614 kvm_vcpu_kick(vcpu);
615
616 return 0;
617 }
618
kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu * vcpu,struct kvm_enable_cap * cap)619 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
620 struct kvm_enable_cap *cap)
621 {
622 int r;
623
624 if (cap->flags)
625 return -EINVAL;
626
627 switch (cap->cap) {
628 case KVM_CAP_PPC_OSI:
629 r = 0;
630 vcpu->arch.osi_enabled = true;
631 break;
632 case KVM_CAP_PPC_PAPR:
633 r = 0;
634 vcpu->arch.papr_enabled = true;
635 break;
636 #ifdef CONFIG_KVM_E500
637 case KVM_CAP_SW_TLB: {
638 struct kvm_config_tlb cfg;
639 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
640
641 r = -EFAULT;
642 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
643 break;
644
645 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
646 break;
647 }
648 #endif
649 default:
650 r = -EINVAL;
651 break;
652 }
653
654 if (!r)
655 r = kvmppc_sanity_check(vcpu);
656
657 return r;
658 }
659
kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu * vcpu,struct kvm_mp_state * mp_state)660 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
661 struct kvm_mp_state *mp_state)
662 {
663 return -EINVAL;
664 }
665
kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu * vcpu,struct kvm_mp_state * mp_state)666 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
667 struct kvm_mp_state *mp_state)
668 {
669 return -EINVAL;
670 }
671
kvm_arch_vcpu_ioctl(struct file * filp,unsigned int ioctl,unsigned long arg)672 long kvm_arch_vcpu_ioctl(struct file *filp,
673 unsigned int ioctl, unsigned long arg)
674 {
675 struct kvm_vcpu *vcpu = filp->private_data;
676 void __user *argp = (void __user *)arg;
677 long r;
678
679 switch (ioctl) {
680 case KVM_INTERRUPT: {
681 struct kvm_interrupt irq;
682 r = -EFAULT;
683 if (copy_from_user(&irq, argp, sizeof(irq)))
684 goto out;
685 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
686 goto out;
687 }
688
689 case KVM_ENABLE_CAP:
690 {
691 struct kvm_enable_cap cap;
692 r = -EFAULT;
693 if (copy_from_user(&cap, argp, sizeof(cap)))
694 goto out;
695 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
696 break;
697 }
698
699 case KVM_SET_ONE_REG:
700 case KVM_GET_ONE_REG:
701 {
702 struct kvm_one_reg reg;
703 r = -EFAULT;
704 if (copy_from_user(®, argp, sizeof(reg)))
705 goto out;
706 if (ioctl == KVM_SET_ONE_REG)
707 r = kvm_vcpu_ioctl_set_one_reg(vcpu, ®);
708 else
709 r = kvm_vcpu_ioctl_get_one_reg(vcpu, ®);
710 break;
711 }
712
713 #ifdef CONFIG_KVM_E500
714 case KVM_DIRTY_TLB: {
715 struct kvm_dirty_tlb dirty;
716 r = -EFAULT;
717 if (copy_from_user(&dirty, argp, sizeof(dirty)))
718 goto out;
719 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
720 break;
721 }
722 #endif
723
724 default:
725 r = -EINVAL;
726 }
727
728 out:
729 return r;
730 }
731
kvm_arch_vcpu_fault(struct kvm_vcpu * vcpu,struct vm_fault * vmf)732 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
733 {
734 return VM_FAULT_SIGBUS;
735 }
736
kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo * pvinfo)737 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
738 {
739 u32 inst_lis = 0x3c000000;
740 u32 inst_ori = 0x60000000;
741 u32 inst_nop = 0x60000000;
742 u32 inst_sc = 0x44000002;
743 u32 inst_imm_mask = 0xffff;
744
745 /*
746 * The hypercall to get into KVM from within guest context is as
747 * follows:
748 *
749 * lis r0, r0, KVM_SC_MAGIC_R0@h
750 * ori r0, KVM_SC_MAGIC_R0@l
751 * sc
752 * nop
753 */
754 pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
755 pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
756 pvinfo->hcall[2] = inst_sc;
757 pvinfo->hcall[3] = inst_nop;
758
759 return 0;
760 }
761
kvm_arch_vm_ioctl(struct file * filp,unsigned int ioctl,unsigned long arg)762 long kvm_arch_vm_ioctl(struct file *filp,
763 unsigned int ioctl, unsigned long arg)
764 {
765 void __user *argp = (void __user *)arg;
766 long r;
767
768 switch (ioctl) {
769 case KVM_PPC_GET_PVINFO: {
770 struct kvm_ppc_pvinfo pvinfo;
771 memset(&pvinfo, 0, sizeof(pvinfo));
772 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
773 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
774 r = -EFAULT;
775 goto out;
776 }
777
778 break;
779 }
780 #ifdef CONFIG_KVM_BOOK3S_64_HV
781 case KVM_CREATE_SPAPR_TCE: {
782 struct kvm_create_spapr_tce create_tce;
783 struct kvm *kvm = filp->private_data;
784
785 r = -EFAULT;
786 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
787 goto out;
788 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
789 goto out;
790 }
791
792 case KVM_ALLOCATE_RMA: {
793 struct kvm *kvm = filp->private_data;
794 struct kvm_allocate_rma rma;
795
796 r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
797 if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
798 r = -EFAULT;
799 break;
800 }
801 #endif /* CONFIG_KVM_BOOK3S_64_HV */
802
803 default:
804 r = -ENOTTY;
805 }
806
807 out:
808 return r;
809 }
810
kvm_arch_init(void * opaque)811 int kvm_arch_init(void *opaque)
812 {
813 return 0;
814 }
815
kvm_arch_exit(void)816 void kvm_arch_exit(void)
817 {
818 }
819