0e21d155eea7fd42db74505d208e24be47fcb973
[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 int kvm_arch_prepare_memory_region(struct kvm *kvm,
285                                    struct kvm_memory_slot *memslot,
286                                    struct kvm_memory_slot old,
287                                    struct kvm_userspace_memory_region *mem,
288                                    int user_alloc)
289 {
290         return kvmppc_core_prepare_memory_region(kvm, mem);
291 }
292
293 void kvm_arch_commit_memory_region(struct kvm *kvm,
294                struct kvm_userspace_memory_region *mem,
295                struct kvm_memory_slot old,
296                int user_alloc)
297 {
298         kvmppc_core_commit_memory_region(kvm, mem);
299 }
300
301
302 void kvm_arch_flush_shadow(struct kvm *kvm)
303 {
304 }
305
306 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
307 {
308         struct kvm_vcpu *vcpu;
309         vcpu = kvmppc_core_vcpu_create(kvm, id);
310         if (!IS_ERR(vcpu)) {
311                 vcpu->arch.wqp = &vcpu->wq;
312                 kvmppc_create_vcpu_debugfs(vcpu, id);
313         }
314         return vcpu;
315 }
316
317 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
318 {
319         /* Make sure we're not using the vcpu anymore */
320         hrtimer_cancel(&vcpu->arch.dec_timer);
321         tasklet_kill(&vcpu->arch.tasklet);
322
323         kvmppc_remove_vcpu_debugfs(vcpu);
324         kvmppc_core_vcpu_free(vcpu);
325 }
326
327 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
328 {
329         kvm_arch_vcpu_free(vcpu);
330 }
331
332 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
333 {
334         return kvmppc_core_pending_dec(vcpu);
335 }
336
337 /*
338  * low level hrtimer wake routine. Because this runs in hardirq context
339  * we schedule a tasklet to do the real work.
340  */
341 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
342 {
343         struct kvm_vcpu *vcpu;
344
345         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
346         tasklet_schedule(&vcpu->arch.tasklet);
347
348         return HRTIMER_NORESTART;
349 }
350
351 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
352 {
353         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
354         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
355         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
356         vcpu->arch.dec_expires = ~(u64)0;
357
358 #ifdef CONFIG_KVM_EXIT_TIMING
359         mutex_init(&vcpu->arch.exit_timing_lock);
360 #endif
361
362         return 0;
363 }
364
365 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
366 {
367         kvmppc_mmu_destroy(vcpu);
368 }
369
370 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
371 {
372 #ifdef CONFIG_BOOKE
373         /*
374          * vrsave (formerly usprg0) isn't used by Linux, but may
375          * be used by the guest.
376          *
377          * On non-booke this is associated with Altivec and
378          * is handled by code in book3s.c.
379          */
380         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
381 #endif
382         kvmppc_core_vcpu_load(vcpu, cpu);
383         vcpu->cpu = smp_processor_id();
384 }
385
386 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
387 {
388         kvmppc_core_vcpu_put(vcpu);
389 #ifdef CONFIG_BOOKE
390         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
391 #endif
392         vcpu->cpu = -1;
393 }
394
395 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
396                                         struct kvm_guest_debug *dbg)
397 {
398         return -EINVAL;
399 }
400
401 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
402                                      struct kvm_run *run)
403 {
404         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
405 }
406
407 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
408                                       struct kvm_run *run)
409 {
410         u64 uninitialized_var(gpr);
411
412         if (run->mmio.len > sizeof(gpr)) {
413                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
414                 return;
415         }
416
417         if (vcpu->arch.mmio_is_bigendian) {
418                 switch (run->mmio.len) {
419                 case 8: gpr = *(u64 *)run->mmio.data; break;
420                 case 4: gpr = *(u32 *)run->mmio.data; break;
421                 case 2: gpr = *(u16 *)run->mmio.data; break;
422                 case 1: gpr = *(u8 *)run->mmio.data; break;
423                 }
424         } else {
425                 /* Convert BE data from userland back to LE. */
426                 switch (run->mmio.len) {
427                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
428                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
429                 case 1: gpr = *(u8 *)run->mmio.data; break;
430                 }
431         }
432
433         if (vcpu->arch.mmio_sign_extend) {
434                 switch (run->mmio.len) {
435 #ifdef CONFIG_PPC64
436                 case 4:
437                         gpr = (s64)(s32)gpr;
438                         break;
439 #endif
440                 case 2:
441                         gpr = (s64)(s16)gpr;
442                         break;
443                 case 1:
444                         gpr = (s64)(s8)gpr;
445                         break;
446                 }
447         }
448
449         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
450
451         switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
452         case KVM_MMIO_REG_GPR:
453                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
454                 break;
455         case KVM_MMIO_REG_FPR:
456                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
457                 break;
458 #ifdef CONFIG_PPC_BOOK3S
459         case KVM_MMIO_REG_QPR:
460                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
461                 break;
462         case KVM_MMIO_REG_FQPR:
463                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
464                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
465                 break;
466 #endif
467         default:
468                 BUG();
469         }
470 }
471
472 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
473                        unsigned int rt, unsigned int bytes, int is_bigendian)
474 {
475         if (bytes > sizeof(run->mmio.data)) {
476                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
477                        run->mmio.len);
478         }
479
480         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
481         run->mmio.len = bytes;
482         run->mmio.is_write = 0;
483
484         vcpu->arch.io_gpr = rt;
485         vcpu->arch.mmio_is_bigendian = is_bigendian;
486         vcpu->mmio_needed = 1;
487         vcpu->mmio_is_write = 0;
488         vcpu->arch.mmio_sign_extend = 0;
489
490         return EMULATE_DO_MMIO;
491 }
492
493 /* Same as above, but sign extends */
494 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
495                         unsigned int rt, unsigned int bytes, int is_bigendian)
496 {
497         int r;
498
499         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
500         vcpu->arch.mmio_sign_extend = 1;
501
502         return r;
503 }
504
505 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
506                         u64 val, unsigned int bytes, int is_bigendian)
507 {
508         void *data = run->mmio.data;
509
510         if (bytes > sizeof(run->mmio.data)) {
511                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
512                        run->mmio.len);
513         }
514
515         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
516         run->mmio.len = bytes;
517         run->mmio.is_write = 1;
518         vcpu->mmio_needed = 1;
519         vcpu->mmio_is_write = 1;
520
521         /* Store the value at the lowest bytes in 'data'. */
522         if (is_bigendian) {
523                 switch (bytes) {
524                 case 8: *(u64 *)data = val; break;
525                 case 4: *(u32 *)data = val; break;
526                 case 2: *(u16 *)data = val; break;
527                 case 1: *(u8  *)data = val; break;
528                 }
529         } else {
530                 /* Store LE value into 'data'. */
531                 switch (bytes) {
532                 case 4: st_le32(data, val); break;
533                 case 2: st_le16(data, val); break;
534                 case 1: *(u8 *)data = val; break;
535                 }
536         }
537
538         return EMULATE_DO_MMIO;
539 }
540
541 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
542 {
543         int r;
544         sigset_t sigsaved;
545
546         if (vcpu->sigset_active)
547                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
548
549         if (vcpu->mmio_needed) {
550                 if (!vcpu->mmio_is_write)
551                         kvmppc_complete_mmio_load(vcpu, run);
552                 vcpu->mmio_needed = 0;
553         } else if (vcpu->arch.dcr_needed) {
554                 if (!vcpu->arch.dcr_is_write)
555                         kvmppc_complete_dcr_load(vcpu, run);
556                 vcpu->arch.dcr_needed = 0;
557         } else if (vcpu->arch.osi_needed) {
558                 u64 *gprs = run->osi.gprs;
559                 int i;
560
561                 for (i = 0; i < 32; i++)
562                         kvmppc_set_gpr(vcpu, i, gprs[i]);
563                 vcpu->arch.osi_needed = 0;
564         } else if (vcpu->arch.hcall_needed) {
565                 int i;
566
567                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
568                 for (i = 0; i < 9; ++i)
569                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
570                 vcpu->arch.hcall_needed = 0;
571         }
572
573         r = kvmppc_vcpu_run(run, vcpu);
574
575         if (vcpu->sigset_active)
576                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
577
578         return r;
579 }
580
581 void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
582 {
583         int me;
584         int cpu = vcpu->cpu;
585
586         me = get_cpu();
587         if (waitqueue_active(vcpu->arch.wqp)) {
588                 wake_up_interruptible(vcpu->arch.wqp);
589                 vcpu->stat.halt_wakeup++;
590         } else if (cpu != me && cpu != -1) {
591                 smp_send_reschedule(vcpu->cpu);
592         }
593         put_cpu();
594 }
595
596 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
597 {
598         if (irq->irq == KVM_INTERRUPT_UNSET) {
599                 kvmppc_core_dequeue_external(vcpu, irq);
600                 return 0;
601         }
602
603         kvmppc_core_queue_external(vcpu, irq);
604         kvm_vcpu_kick(vcpu);
605
606         return 0;
607 }
608
609 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
610                                      struct kvm_enable_cap *cap)
611 {
612         int r;
613
614         if (cap->flags)
615                 return -EINVAL;
616
617         switch (cap->cap) {
618         case KVM_CAP_PPC_OSI:
619                 r = 0;
620                 vcpu->arch.osi_enabled = true;
621                 break;
622         case KVM_CAP_PPC_PAPR:
623                 r = 0;
624                 vcpu->arch.papr_enabled = true;
625                 break;
626 #ifdef CONFIG_KVM_E500
627         case KVM_CAP_SW_TLB: {
628                 struct kvm_config_tlb cfg;
629                 void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];
630
631                 r = -EFAULT;
632                 if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
633                         break;
634
635                 r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
636                 break;
637         }
638 #endif
639         default:
640                 r = -EINVAL;
641                 break;
642         }
643
644         if (!r)
645                 r = kvmppc_sanity_check(vcpu);
646
647         return r;
648 }
649
650 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
651                                     struct kvm_mp_state *mp_state)
652 {
653         return -EINVAL;
654 }
655
656 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
657                                     struct kvm_mp_state *mp_state)
658 {
659         return -EINVAL;
660 }
661
662 long kvm_arch_vcpu_ioctl(struct file *filp,
663                          unsigned int ioctl, unsigned long arg)
664 {
665         struct kvm_vcpu *vcpu = filp->private_data;
666         void __user *argp = (void __user *)arg;
667         long r;
668
669         switch (ioctl) {
670         case KVM_INTERRUPT: {
671                 struct kvm_interrupt irq;
672                 r = -EFAULT;
673                 if (copy_from_user(&irq, argp, sizeof(irq)))
674                         goto out;
675                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
676                 goto out;
677         }
678
679         case KVM_ENABLE_CAP:
680         {
681                 struct kvm_enable_cap cap;
682                 r = -EFAULT;
683                 if (copy_from_user(&cap, argp, sizeof(cap)))
684                         goto out;
685                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
686                 break;
687         }
688
689         case KVM_SET_ONE_REG:
690         case KVM_GET_ONE_REG:
691         {
692                 struct kvm_one_reg reg;
693                 r = -EFAULT;
694                 if (copy_from_user(&reg, argp, sizeof(reg)))
695                         goto out;
696                 if (ioctl == KVM_SET_ONE_REG)
697                         r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
698                 else
699                         r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
700                 break;
701         }
702
703 #ifdef CONFIG_KVM_E500
704         case KVM_DIRTY_TLB: {
705                 struct kvm_dirty_tlb dirty;
706                 r = -EFAULT;
707                 if (copy_from_user(&dirty, argp, sizeof(dirty)))
708                         goto out;
709                 r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
710                 break;
711         }
712 #endif
713
714         default:
715                 r = -EINVAL;
716         }
717
718 out:
719         return r;
720 }
721
722 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
723 {
724         return VM_FAULT_SIGBUS;
725 }
726
727 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
728 {
729         u32 inst_lis = 0x3c000000;
730         u32 inst_ori = 0x60000000;
731         u32 inst_nop = 0x60000000;
732         u32 inst_sc = 0x44000002;
733         u32 inst_imm_mask = 0xffff;
734
735         /*
736          * The hypercall to get into KVM from within guest context is as
737          * follows:
738          *
739          *    lis r0, r0, KVM_SC_MAGIC_R0@h
740          *    ori r0, KVM_SC_MAGIC_R0@l
741          *    sc
742          *    nop
743          */
744         pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
745         pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
746         pvinfo->hcall[2] = inst_sc;
747         pvinfo->hcall[3] = inst_nop;
748
749         return 0;
750 }
751
752 long kvm_arch_vm_ioctl(struct file *filp,
753                        unsigned int ioctl, unsigned long arg)
754 {
755         void __user *argp = (void __user *)arg;
756         long r;
757
758         switch (ioctl) {
759         case KVM_PPC_GET_PVINFO: {
760                 struct kvm_ppc_pvinfo pvinfo;
761                 memset(&pvinfo, 0, sizeof(pvinfo));
762                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
763                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
764                         r = -EFAULT;
765                         goto out;
766                 }
767
768                 break;
769         }
770 #ifdef CONFIG_KVM_BOOK3S_64_HV
771         case KVM_CREATE_SPAPR_TCE: {
772                 struct kvm_create_spapr_tce create_tce;
773                 struct kvm *kvm = filp->private_data;
774
775                 r = -EFAULT;
776                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
777                         goto out;
778                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
779                 goto out;
780         }
781
782         case KVM_ALLOCATE_RMA: {
783                 struct kvm *kvm = filp->private_data;
784                 struct kvm_allocate_rma rma;
785
786                 r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
787                 if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
788                         r = -EFAULT;
789                 break;
790         }
791 #endif /* CONFIG_KVM_BOOK3S_64_HV */
792
793         default:
794                 r = -ENOTTY;
795         }
796
797 out:
798         return r;
799 }
800
801 int kvm_arch_init(void *opaque)
802 {
803         return 0;
804 }
805
806 void kvm_arch_exit(void)
807 {
808 }