KVM: Introduce kvm_memory_slot::arch and move lpage_info into it
[linux-2.6.git] / arch / powerpc / kvm / powerpc.c
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 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
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
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
152 int kvm_arch_hardware_enable(void *garbage)
153 {
154         return 0;
155 }
156
157 void kvm_arch_hardware_disable(void *garbage)
158 {
159 }
160
161 int kvm_arch_hardware_setup(void)
162 {
163         return 0;
164 }
165
166 void kvm_arch_hardware_unsetup(void)
167 {
168 }
169
170 void kvm_arch_check_processor_compat(void *rtn)
171 {
172         *(int *)rtn = kvmppc_core_check_processor_compat();
173 }
174
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
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
202 void kvm_arch_sync_events(struct kvm *kvm)
203 {
204 }
205
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
278 long kvm_arch_dev_ioctl(struct file *filp,
279                         unsigned int ioctl, unsigned long arg)
280 {
281         return -EINVAL;
282 }
283
284 void kvm_arch_free_memslot(struct kvm_memory_slot *free,
285                            struct kvm_memory_slot *dont)
286 {
287 }
288
289 int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
290 {
291         return 0;
292 }
293
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
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
312 void kvm_arch_flush_shadow(struct kvm *kvm)
313 {
314 }
315
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
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
337 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
338 {
339         kvm_arch_vcpu_free(vcpu);
340 }
341
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  */
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
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
375 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
376 {
377         kvmppc_mmu_destroy(vcpu);
378 }
379
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
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
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
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
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
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 */
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
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
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
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
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
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
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
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
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(&reg, argp, sizeof(reg)))
705                         goto out;
706                 if (ioctl == KVM_SET_ONE_REG)
707                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
708                 else
709                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
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
732 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
733 {
734         return VM_FAULT_SIGBUS;
735 }
736
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
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
811 int kvm_arch_init(void *opaque)
812 {
813         return 0;
814 }
815
816 void kvm_arch_exit(void)
817 {
818 }