KVM: s390: ucontrol: export SIE control block to user
[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 }
44
45 int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
46 {
47         int nr = kvmppc_get_gpr(vcpu, 11);
48         int r;
49         unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
50         unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
51         unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
52         unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
53         unsigned long r2 = 0;
54
55         if (!(vcpu->arch.shared->msr & MSR_SF)) {
56                 /* 32 bit mode */
57                 param1 &= 0xffffffff;
58                 param2 &= 0xffffffff;
59                 param3 &= 0xffffffff;
60                 param4 &= 0xffffffff;
61         }
62
63         switch (nr) {
64         case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE:
65         {
66                 vcpu->arch.magic_page_pa = param1;
67                 vcpu->arch.magic_page_ea = param2;
68
69                 r2 = KVM_MAGIC_FEAT_SR;
70
71                 r = HC_EV_SUCCESS;
72                 break;
73         }
74         case HC_VENDOR_KVM | KVM_HC_FEATURES:
75                 r = HC_EV_SUCCESS;
76 #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500)
77                 /* XXX Missing magic page on 44x */
78                 r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
79 #endif
80
81                 /* Second return value is in r4 */
82                 break;
83         default:
84                 r = HC_EV_UNIMPLEMENTED;
85                 break;
86         }
87
88         kvmppc_set_gpr(vcpu, 4, r2);
89
90         return r;
91 }
92
93 int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
94 {
95         int r = false;
96
97         /* We have to know what CPU to virtualize */
98         if (!vcpu->arch.pvr)
99                 goto out;
100
101         /* PAPR only works with book3s_64 */
102         if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
103                 goto out;
104
105 #ifdef CONFIG_KVM_BOOK3S_64_HV
106         /* HV KVM can only do PAPR mode for now */
107         if (!vcpu->arch.papr_enabled)
108                 goto out;
109 #endif
110
111         r = true;
112
113 out:
114         vcpu->arch.sane = r;
115         return r ? 0 : -EINVAL;
116 }
117
118 int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
119 {
120         enum emulation_result er;
121         int r;
122
123         er = kvmppc_emulate_instruction(run, vcpu);
124         switch (er) {
125         case EMULATE_DONE:
126                 /* Future optimization: only reload non-volatiles if they were
127                  * actually modified. */
128                 r = RESUME_GUEST_NV;
129                 break;
130         case EMULATE_DO_MMIO:
131                 run->exit_reason = KVM_EXIT_MMIO;
132                 /* We must reload nonvolatiles because "update" load/store
133                  * instructions modify register state. */
134                 /* Future optimization: only reload non-volatiles if they were
135                  * actually modified. */
136                 r = RESUME_HOST_NV;
137                 break;
138         case EMULATE_FAIL:
139                 /* XXX Deliver Program interrupt to guest. */
140                 printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
141                        kvmppc_get_last_inst(vcpu));
142                 r = RESUME_HOST;
143                 break;
144         default:
145                 BUG();
146         }
147
148         return r;
149 }
150
151 int kvm_arch_hardware_enable(void *garbage)
152 {
153         return 0;
154 }
155
156 void kvm_arch_hardware_disable(void *garbage)
157 {
158 }
159
160 int kvm_arch_hardware_setup(void)
161 {
162         return 0;
163 }
164
165 void kvm_arch_hardware_unsetup(void)
166 {
167 }
168
169 void kvm_arch_check_processor_compat(void *rtn)
170 {
171         *(int *)rtn = kvmppc_core_check_processor_compat();
172 }
173
174 int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
175 {
176         if (type)
177                 return -EINVAL;
178
179         return kvmppc_core_init_vm(kvm);
180 }
181
182 void kvm_arch_destroy_vm(struct kvm *kvm)
183 {
184         unsigned int i;
185         struct kvm_vcpu *vcpu;
186
187         kvm_for_each_vcpu(i, vcpu, kvm)
188                 kvm_arch_vcpu_free(vcpu);
189
190         mutex_lock(&kvm->lock);
191         for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
192                 kvm->vcpus[i] = NULL;
193
194         atomic_set(&kvm->online_vcpus, 0);
195
196         kvmppc_core_destroy_vm(kvm);
197
198         mutex_unlock(&kvm->lock);
199 }
200
201 void kvm_arch_sync_events(struct kvm *kvm)
202 {
203 }
204
205 int kvm_dev_ioctl_check_extension(long ext)
206 {
207         int r;
208
209         switch (ext) {
210 #ifdef CONFIG_BOOKE
211         case KVM_CAP_PPC_BOOKE_SREGS:
212 #else
213         case KVM_CAP_PPC_SEGSTATE:
214         case KVM_CAP_PPC_PAPR:
215 #endif
216         case KVM_CAP_PPC_UNSET_IRQ:
217         case KVM_CAP_PPC_IRQ_LEVEL:
218         case KVM_CAP_ENABLE_CAP:
219                 r = 1;
220                 break;
221 #ifndef CONFIG_KVM_BOOK3S_64_HV
222         case KVM_CAP_PPC_PAIRED_SINGLES:
223         case KVM_CAP_PPC_OSI:
224         case KVM_CAP_PPC_GET_PVINFO:
225                 r = 1;
226                 break;
227         case KVM_CAP_COALESCED_MMIO:
228                 r = KVM_COALESCED_MMIO_PAGE_OFFSET;
229                 break;
230 #endif
231 #ifdef CONFIG_KVM_BOOK3S_64_HV
232         case KVM_CAP_SPAPR_TCE:
233                 r = 1;
234                 break;
235         case KVM_CAP_PPC_SMT:
236                 r = threads_per_core;
237                 break;
238         case KVM_CAP_PPC_RMA:
239                 r = 1;
240                 /* PPC970 requires an RMA */
241                 if (cpu_has_feature(CPU_FTR_ARCH_201))
242                         r = 2;
243                 break;
244 #endif
245         default:
246                 r = 0;
247                 break;
248         }
249         return r;
250
251 }
252
253 long kvm_arch_dev_ioctl(struct file *filp,
254                         unsigned int ioctl, unsigned long arg)
255 {
256         return -EINVAL;
257 }
258
259 int kvm_arch_prepare_memory_region(struct kvm *kvm,
260                                    struct kvm_memory_slot *memslot,
261                                    struct kvm_memory_slot old,
262                                    struct kvm_userspace_memory_region *mem,
263                                    int user_alloc)
264 {
265         return kvmppc_core_prepare_memory_region(kvm, mem);
266 }
267
268 void kvm_arch_commit_memory_region(struct kvm *kvm,
269                struct kvm_userspace_memory_region *mem,
270                struct kvm_memory_slot old,
271                int user_alloc)
272 {
273         kvmppc_core_commit_memory_region(kvm, mem);
274 }
275
276
277 void kvm_arch_flush_shadow(struct kvm *kvm)
278 {
279 }
280
281 struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
282 {
283         struct kvm_vcpu *vcpu;
284         vcpu = kvmppc_core_vcpu_create(kvm, id);
285         vcpu->arch.wqp = &vcpu->wq;
286         if (!IS_ERR(vcpu))
287                 kvmppc_create_vcpu_debugfs(vcpu, id);
288         return vcpu;
289 }
290
291 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
292 {
293         /* Make sure we're not using the vcpu anymore */
294         hrtimer_cancel(&vcpu->arch.dec_timer);
295         tasklet_kill(&vcpu->arch.tasklet);
296
297         kvmppc_remove_vcpu_debugfs(vcpu);
298         kvmppc_core_vcpu_free(vcpu);
299 }
300
301 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
302 {
303         kvm_arch_vcpu_free(vcpu);
304 }
305
306 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
307 {
308         return kvmppc_core_pending_dec(vcpu);
309 }
310
311 static void kvmppc_decrementer_func(unsigned long data)
312 {
313         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
314
315         kvmppc_core_queue_dec(vcpu);
316
317         if (waitqueue_active(vcpu->arch.wqp)) {
318                 wake_up_interruptible(vcpu->arch.wqp);
319                 vcpu->stat.halt_wakeup++;
320         }
321 }
322
323 /*
324  * low level hrtimer wake routine. Because this runs in hardirq context
325  * we schedule a tasklet to do the real work.
326  */
327 enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
328 {
329         struct kvm_vcpu *vcpu;
330
331         vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
332         tasklet_schedule(&vcpu->arch.tasklet);
333
334         return HRTIMER_NORESTART;
335 }
336
337 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
338 {
339         hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
340         tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
341         vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
342         vcpu->arch.dec_expires = ~(u64)0;
343
344 #ifdef CONFIG_KVM_EXIT_TIMING
345         mutex_init(&vcpu->arch.exit_timing_lock);
346 #endif
347
348         return 0;
349 }
350
351 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
352 {
353         kvmppc_mmu_destroy(vcpu);
354 }
355
356 void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
357 {
358 #ifdef CONFIG_BOOKE
359         /*
360          * vrsave (formerly usprg0) isn't used by Linux, but may
361          * be used by the guest.
362          *
363          * On non-booke this is associated with Altivec and
364          * is handled by code in book3s.c.
365          */
366         mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
367 #endif
368         kvmppc_core_vcpu_load(vcpu, cpu);
369         vcpu->cpu = smp_processor_id();
370 }
371
372 void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
373 {
374         kvmppc_core_vcpu_put(vcpu);
375 #ifdef CONFIG_BOOKE
376         vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
377 #endif
378         vcpu->cpu = -1;
379 }
380
381 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
382                                         struct kvm_guest_debug *dbg)
383 {
384         return -EINVAL;
385 }
386
387 static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
388                                      struct kvm_run *run)
389 {
390         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
391 }
392
393 static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
394                                       struct kvm_run *run)
395 {
396         u64 uninitialized_var(gpr);
397
398         if (run->mmio.len > sizeof(gpr)) {
399                 printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
400                 return;
401         }
402
403         if (vcpu->arch.mmio_is_bigendian) {
404                 switch (run->mmio.len) {
405                 case 8: gpr = *(u64 *)run->mmio.data; break;
406                 case 4: gpr = *(u32 *)run->mmio.data; break;
407                 case 2: gpr = *(u16 *)run->mmio.data; break;
408                 case 1: gpr = *(u8 *)run->mmio.data; break;
409                 }
410         } else {
411                 /* Convert BE data from userland back to LE. */
412                 switch (run->mmio.len) {
413                 case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
414                 case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
415                 case 1: gpr = *(u8 *)run->mmio.data; break;
416                 }
417         }
418
419         if (vcpu->arch.mmio_sign_extend) {
420                 switch (run->mmio.len) {
421 #ifdef CONFIG_PPC64
422                 case 4:
423                         gpr = (s64)(s32)gpr;
424                         break;
425 #endif
426                 case 2:
427                         gpr = (s64)(s16)gpr;
428                         break;
429                 case 1:
430                         gpr = (s64)(s8)gpr;
431                         break;
432                 }
433         }
434
435         kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
436
437         switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
438         case KVM_REG_GPR:
439                 kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
440                 break;
441         case KVM_REG_FPR:
442                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
443                 break;
444 #ifdef CONFIG_PPC_BOOK3S
445         case KVM_REG_QPR:
446                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
447                 break;
448         case KVM_REG_FQPR:
449                 vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
450                 vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
451                 break;
452 #endif
453         default:
454                 BUG();
455         }
456 }
457
458 int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
459                        unsigned int rt, unsigned int bytes, int is_bigendian)
460 {
461         if (bytes > sizeof(run->mmio.data)) {
462                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
463                        run->mmio.len);
464         }
465
466         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
467         run->mmio.len = bytes;
468         run->mmio.is_write = 0;
469
470         vcpu->arch.io_gpr = rt;
471         vcpu->arch.mmio_is_bigendian = is_bigendian;
472         vcpu->mmio_needed = 1;
473         vcpu->mmio_is_write = 0;
474         vcpu->arch.mmio_sign_extend = 0;
475
476         return EMULATE_DO_MMIO;
477 }
478
479 /* Same as above, but sign extends */
480 int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
481                         unsigned int rt, unsigned int bytes, int is_bigendian)
482 {
483         int r;
484
485         r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
486         vcpu->arch.mmio_sign_extend = 1;
487
488         return r;
489 }
490
491 int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
492                         u64 val, unsigned int bytes, int is_bigendian)
493 {
494         void *data = run->mmio.data;
495
496         if (bytes > sizeof(run->mmio.data)) {
497                 printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
498                        run->mmio.len);
499         }
500
501         run->mmio.phys_addr = vcpu->arch.paddr_accessed;
502         run->mmio.len = bytes;
503         run->mmio.is_write = 1;
504         vcpu->mmio_needed = 1;
505         vcpu->mmio_is_write = 1;
506
507         /* Store the value at the lowest bytes in 'data'. */
508         if (is_bigendian) {
509                 switch (bytes) {
510                 case 8: *(u64 *)data = val; break;
511                 case 4: *(u32 *)data = val; break;
512                 case 2: *(u16 *)data = val; break;
513                 case 1: *(u8  *)data = val; break;
514                 }
515         } else {
516                 /* Store LE value into 'data'. */
517                 switch (bytes) {
518                 case 4: st_le32(data, val); break;
519                 case 2: st_le16(data, val); break;
520                 case 1: *(u8 *)data = val; break;
521                 }
522         }
523
524         return EMULATE_DO_MMIO;
525 }
526
527 int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
528 {
529         int r;
530         sigset_t sigsaved;
531
532         if (vcpu->sigset_active)
533                 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
534
535         if (vcpu->mmio_needed) {
536                 if (!vcpu->mmio_is_write)
537                         kvmppc_complete_mmio_load(vcpu, run);
538                 vcpu->mmio_needed = 0;
539         } else if (vcpu->arch.dcr_needed) {
540                 if (!vcpu->arch.dcr_is_write)
541                         kvmppc_complete_dcr_load(vcpu, run);
542                 vcpu->arch.dcr_needed = 0;
543         } else if (vcpu->arch.osi_needed) {
544                 u64 *gprs = run->osi.gprs;
545                 int i;
546
547                 for (i = 0; i < 32; i++)
548                         kvmppc_set_gpr(vcpu, i, gprs[i]);
549                 vcpu->arch.osi_needed = 0;
550         } else if (vcpu->arch.hcall_needed) {
551                 int i;
552
553                 kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
554                 for (i = 0; i < 9; ++i)
555                         kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
556                 vcpu->arch.hcall_needed = 0;
557         }
558
559         kvmppc_core_deliver_interrupts(vcpu);
560
561         r = kvmppc_vcpu_run(run, vcpu);
562
563         if (vcpu->sigset_active)
564                 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
565
566         return r;
567 }
568
569 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
570 {
571         if (irq->irq == KVM_INTERRUPT_UNSET) {
572                 kvmppc_core_dequeue_external(vcpu, irq);
573                 return 0;
574         }
575
576         kvmppc_core_queue_external(vcpu, irq);
577
578         if (waitqueue_active(vcpu->arch.wqp)) {
579                 wake_up_interruptible(vcpu->arch.wqp);
580                 vcpu->stat.halt_wakeup++;
581         } else if (vcpu->cpu != -1) {
582                 smp_send_reschedule(vcpu->cpu);
583         }
584
585         return 0;
586 }
587
588 static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
589                                      struct kvm_enable_cap *cap)
590 {
591         int r;
592
593         if (cap->flags)
594                 return -EINVAL;
595
596         switch (cap->cap) {
597         case KVM_CAP_PPC_OSI:
598                 r = 0;
599                 vcpu->arch.osi_enabled = true;
600                 break;
601         case KVM_CAP_PPC_PAPR:
602                 r = 0;
603                 vcpu->arch.papr_enabled = true;
604                 break;
605         default:
606                 r = -EINVAL;
607                 break;
608         }
609
610         if (!r)
611                 r = kvmppc_sanity_check(vcpu);
612
613         return r;
614 }
615
616 int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
617                                     struct kvm_mp_state *mp_state)
618 {
619         return -EINVAL;
620 }
621
622 int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
623                                     struct kvm_mp_state *mp_state)
624 {
625         return -EINVAL;
626 }
627
628 long kvm_arch_vcpu_ioctl(struct file *filp,
629                          unsigned int ioctl, unsigned long arg)
630 {
631         struct kvm_vcpu *vcpu = filp->private_data;
632         void __user *argp = (void __user *)arg;
633         long r;
634
635         switch (ioctl) {
636         case KVM_INTERRUPT: {
637                 struct kvm_interrupt irq;
638                 r = -EFAULT;
639                 if (copy_from_user(&irq, argp, sizeof(irq)))
640                         goto out;
641                 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
642                 goto out;
643         }
644
645         case KVM_ENABLE_CAP:
646         {
647                 struct kvm_enable_cap cap;
648                 r = -EFAULT;
649                 if (copy_from_user(&cap, argp, sizeof(cap)))
650                         goto out;
651                 r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
652                 break;
653         }
654         default:
655                 r = -EINVAL;
656         }
657
658 out:
659         return r;
660 }
661
662 int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
663 {
664         return VM_FAULT_SIGBUS;
665 }
666
667 static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
668 {
669         u32 inst_lis = 0x3c000000;
670         u32 inst_ori = 0x60000000;
671         u32 inst_nop = 0x60000000;
672         u32 inst_sc = 0x44000002;
673         u32 inst_imm_mask = 0xffff;
674
675         /*
676          * The hypercall to get into KVM from within guest context is as
677          * follows:
678          *
679          *    lis r0, r0, KVM_SC_MAGIC_R0@h
680          *    ori r0, KVM_SC_MAGIC_R0@l
681          *    sc
682          *    nop
683          */
684         pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
685         pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
686         pvinfo->hcall[2] = inst_sc;
687         pvinfo->hcall[3] = inst_nop;
688
689         return 0;
690 }
691
692 long kvm_arch_vm_ioctl(struct file *filp,
693                        unsigned int ioctl, unsigned long arg)
694 {
695         void __user *argp = (void __user *)arg;
696         long r;
697
698         switch (ioctl) {
699         case KVM_PPC_GET_PVINFO: {
700                 struct kvm_ppc_pvinfo pvinfo;
701                 memset(&pvinfo, 0, sizeof(pvinfo));
702                 r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
703                 if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
704                         r = -EFAULT;
705                         goto out;
706                 }
707
708                 break;
709         }
710 #ifdef CONFIG_KVM_BOOK3S_64_HV
711         case KVM_CREATE_SPAPR_TCE: {
712                 struct kvm_create_spapr_tce create_tce;
713                 struct kvm *kvm = filp->private_data;
714
715                 r = -EFAULT;
716                 if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
717                         goto out;
718                 r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
719                 goto out;
720         }
721
722         case KVM_ALLOCATE_RMA: {
723                 struct kvm *kvm = filp->private_data;
724                 struct kvm_allocate_rma rma;
725
726                 r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
727                 if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
728                         r = -EFAULT;
729                 break;
730         }
731 #endif /* CONFIG_KVM_BOOK3S_64_HV */
732
733         default:
734                 r = -ENOTTY;
735         }
736
737 out:
738         return r;
739 }
740
741 int kvm_arch_init(void *opaque)
742 {
743         return 0;
744 }
745
746 void kvm_arch_exit(void)
747 {
748 }