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1 /*
2  * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
3  *
4  * Authors:
5  *    Alexander Graf <agraf@suse.de>
6  *    Kevin Wolf <mail@kevin-wolf.de>
7  *
8  * Description:
9  * This file is derived from arch/powerpc/kvm/44x.c,
10  * by Hollis Blanchard <hollisb@us.ibm.com>.
11  *
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU General Public License, version 2, as
14  * published by the Free Software Foundation.
15  */
16
17 #include <linux/kvm_host.h>
18 #include <linux/err.h>
19 #include <linux/export.h>
20 #include <linux/slab.h>
21
22 #include <asm/reg.h>
23 #include <asm/cputable.h>
24 #include <asm/cacheflush.h>
25 #include <asm/tlbflush.h>
26 #include <asm/uaccess.h>
27 #include <asm/io.h>
28 #include <asm/kvm_ppc.h>
29 #include <asm/kvm_book3s.h>
30 #include <asm/mmu_context.h>
31 #include <asm/page.h>
32 #include <linux/gfp.h>
33 #include <linux/sched.h>
34 #include <linux/vmalloc.h>
35 #include <linux/highmem.h>
36
37 #include "trace.h"
38
39 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
40
41 /* #define EXIT_DEBUG */
42
43 struct kvm_stats_debugfs_item debugfs_entries[] = {
44         { "exits",       VCPU_STAT(sum_exits) },
45         { "mmio",        VCPU_STAT(mmio_exits) },
46         { "sig",         VCPU_STAT(signal_exits) },
47         { "sysc",        VCPU_STAT(syscall_exits) },
48         { "inst_emu",    VCPU_STAT(emulated_inst_exits) },
49         { "dec",         VCPU_STAT(dec_exits) },
50         { "ext_intr",    VCPU_STAT(ext_intr_exits) },
51         { "queue_intr",  VCPU_STAT(queue_intr) },
52         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
53         { "pf_storage",  VCPU_STAT(pf_storage) },
54         { "sp_storage",  VCPU_STAT(sp_storage) },
55         { "pf_instruc",  VCPU_STAT(pf_instruc) },
56         { "sp_instruc",  VCPU_STAT(sp_instruc) },
57         { "ld",          VCPU_STAT(ld) },
58         { "ld_slow",     VCPU_STAT(ld_slow) },
59         { "st",          VCPU_STAT(st) },
60         { "st_slow",     VCPU_STAT(st_slow) },
61         { NULL }
62 };
63
64 void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
65 {
66 }
67
68 void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
69 {
70 }
71
72 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
73 {
74         vcpu->arch.shared->srr0 = kvmppc_get_pc(vcpu);
75         vcpu->arch.shared->srr1 = vcpu->arch.shared->msr | flags;
76         kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
77         vcpu->arch.mmu.reset_msr(vcpu);
78 }
79
80 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
81 {
82         unsigned int prio;
83
84         switch (vec) {
85         case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET;         break;
86         case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK;        break;
87         case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE;         break;
88         case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT;         break;
89         case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE;         break;
90         case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT;         break;
91         case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL;             break;
92         case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL;       break;
93         case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT;            break;
94         case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM;              break;
95         case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL;           break;
96         case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER;          break;
97         case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL;              break;
98         case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG;                break;
99         case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC;              break;
100         case 0xf40: prio = BOOK3S_IRQPRIO_VSX;                  break;
101         default:    prio = BOOK3S_IRQPRIO_MAX;                  break;
102         }
103
104         return prio;
105 }
106
107 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
108                                           unsigned int vec)
109 {
110         unsigned long old_pending = vcpu->arch.pending_exceptions;
111
112         clear_bit(kvmppc_book3s_vec2irqprio(vec),
113                   &vcpu->arch.pending_exceptions);
114
115         kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
116                                   old_pending);
117 }
118
119 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
120 {
121         vcpu->stat.queue_intr++;
122
123         set_bit(kvmppc_book3s_vec2irqprio(vec),
124                 &vcpu->arch.pending_exceptions);
125 #ifdef EXIT_DEBUG
126         printk(KERN_INFO "Queueing interrupt %x\n", vec);
127 #endif
128 }
129
130
131 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
132 {
133         /* might as well deliver this straight away */
134         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
135 }
136
137 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
138 {
139         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
140 }
141
142 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
143 {
144         return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
145 }
146
147 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
148 {
149         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
150 }
151
152 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
153                                 struct kvm_interrupt *irq)
154 {
155         unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
156
157         if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
158                 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
159
160         kvmppc_book3s_queue_irqprio(vcpu, vec);
161 }
162
163 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
164 {
165         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
166         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
167 }
168
169 int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
170 {
171         int deliver = 1;
172         int vec = 0;
173         bool crit = kvmppc_critical_section(vcpu);
174
175         switch (priority) {
176         case BOOK3S_IRQPRIO_DECREMENTER:
177                 deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
178                 vec = BOOK3S_INTERRUPT_DECREMENTER;
179                 break;
180         case BOOK3S_IRQPRIO_EXTERNAL:
181         case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
182                 deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
183                 vec = BOOK3S_INTERRUPT_EXTERNAL;
184                 break;
185         case BOOK3S_IRQPRIO_SYSTEM_RESET:
186                 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
187                 break;
188         case BOOK3S_IRQPRIO_MACHINE_CHECK:
189                 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
190                 break;
191         case BOOK3S_IRQPRIO_DATA_STORAGE:
192                 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
193                 break;
194         case BOOK3S_IRQPRIO_INST_STORAGE:
195                 vec = BOOK3S_INTERRUPT_INST_STORAGE;
196                 break;
197         case BOOK3S_IRQPRIO_DATA_SEGMENT:
198                 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
199                 break;
200         case BOOK3S_IRQPRIO_INST_SEGMENT:
201                 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
202                 break;
203         case BOOK3S_IRQPRIO_ALIGNMENT:
204                 vec = BOOK3S_INTERRUPT_ALIGNMENT;
205                 break;
206         case BOOK3S_IRQPRIO_PROGRAM:
207                 vec = BOOK3S_INTERRUPT_PROGRAM;
208                 break;
209         case BOOK3S_IRQPRIO_VSX:
210                 vec = BOOK3S_INTERRUPT_VSX;
211                 break;
212         case BOOK3S_IRQPRIO_ALTIVEC:
213                 vec = BOOK3S_INTERRUPT_ALTIVEC;
214                 break;
215         case BOOK3S_IRQPRIO_FP_UNAVAIL:
216                 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
217                 break;
218         case BOOK3S_IRQPRIO_SYSCALL:
219                 vec = BOOK3S_INTERRUPT_SYSCALL;
220                 break;
221         case BOOK3S_IRQPRIO_DEBUG:
222                 vec = BOOK3S_INTERRUPT_TRACE;
223                 break;
224         case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
225                 vec = BOOK3S_INTERRUPT_PERFMON;
226                 break;
227         default:
228                 deliver = 0;
229                 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
230                 break;
231         }
232
233 #if 0
234         printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
235 #endif
236
237         if (deliver)
238                 kvmppc_inject_interrupt(vcpu, vec, 0);
239
240         return deliver;
241 }
242
243 /*
244  * This function determines if an irqprio should be cleared once issued.
245  */
246 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
247 {
248         switch (priority) {
249                 case BOOK3S_IRQPRIO_DECREMENTER:
250                         /* DEC interrupts get cleared by mtdec */
251                         return false;
252                 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
253                         /* External interrupts get cleared by userspace */
254                         return false;
255         }
256
257         return true;
258 }
259
260 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
261 {
262         unsigned long *pending = &vcpu->arch.pending_exceptions;
263         unsigned long old_pending = vcpu->arch.pending_exceptions;
264         unsigned int priority;
265
266 #ifdef EXIT_DEBUG
267         if (vcpu->arch.pending_exceptions)
268                 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
269 #endif
270         priority = __ffs(*pending);
271         while (priority < BOOK3S_IRQPRIO_MAX) {
272                 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
273                     clear_irqprio(vcpu, priority)) {
274                         clear_bit(priority, &vcpu->arch.pending_exceptions);
275                         break;
276                 }
277
278                 priority = find_next_bit(pending,
279                                          BITS_PER_BYTE * sizeof(*pending),
280                                          priority + 1);
281         }
282
283         /* Tell the guest about our interrupt status */
284         kvmppc_update_int_pending(vcpu, *pending, old_pending);
285
286         return 0;
287 }
288
289 pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn)
290 {
291         ulong mp_pa = vcpu->arch.magic_page_pa;
292
293         if (!(vcpu->arch.shared->msr & MSR_SF))
294                 mp_pa = (uint32_t)mp_pa;
295
296         /* Magic page override */
297         if (unlikely(mp_pa) &&
298             unlikely(((gfn << PAGE_SHIFT) & KVM_PAM) ==
299                      ((mp_pa & PAGE_MASK) & KVM_PAM))) {
300                 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
301                 pfn_t pfn;
302
303                 pfn = (pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
304                 get_page(pfn_to_page(pfn));
305                 return pfn;
306         }
307
308         return gfn_to_pfn(vcpu->kvm, gfn);
309 }
310
311 static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
312                          struct kvmppc_pte *pte)
313 {
314         int relocated = (vcpu->arch.shared->msr & (data ? MSR_DR : MSR_IR));
315         int r;
316
317         if (relocated) {
318                 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data);
319         } else {
320                 pte->eaddr = eaddr;
321                 pte->raddr = eaddr & KVM_PAM;
322                 pte->vpage = VSID_REAL | eaddr >> 12;
323                 pte->may_read = true;
324                 pte->may_write = true;
325                 pte->may_execute = true;
326                 r = 0;
327         }
328
329         return r;
330 }
331
332 static hva_t kvmppc_bad_hva(void)
333 {
334         return PAGE_OFFSET;
335 }
336
337 static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
338                                bool read)
339 {
340         hva_t hpage;
341
342         if (read && !pte->may_read)
343                 goto err;
344
345         if (!read && !pte->may_write)
346                 goto err;
347
348         hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
349         if (kvm_is_error_hva(hpage))
350                 goto err;
351
352         return hpage | (pte->raddr & ~PAGE_MASK);
353 err:
354         return kvmppc_bad_hva();
355 }
356
357 int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
358               bool data)
359 {
360         struct kvmppc_pte pte;
361
362         vcpu->stat.st++;
363
364         if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
365                 return -ENOENT;
366
367         *eaddr = pte.raddr;
368
369         if (!pte.may_write)
370                 return -EPERM;
371
372         if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
373                 return EMULATE_DO_MMIO;
374
375         return EMULATE_DONE;
376 }
377
378 int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
379                       bool data)
380 {
381         struct kvmppc_pte pte;
382         hva_t hva = *eaddr;
383
384         vcpu->stat.ld++;
385
386         if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
387                 goto nopte;
388
389         *eaddr = pte.raddr;
390
391         hva = kvmppc_pte_to_hva(vcpu, &pte, true);
392         if (kvm_is_error_hva(hva))
393                 goto mmio;
394
395         if (copy_from_user(ptr, (void __user *)hva, size)) {
396                 printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
397                 goto mmio;
398         }
399
400         return EMULATE_DONE;
401
402 nopte:
403         return -ENOENT;
404 mmio:
405         return EMULATE_DO_MMIO;
406 }
407
408 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
409 {
410         return 0;
411 }
412
413 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
414 {
415         return 0;
416 }
417
418 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
419 {
420 }
421
422 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
423 {
424         int i;
425
426         regs->pc = kvmppc_get_pc(vcpu);
427         regs->cr = kvmppc_get_cr(vcpu);
428         regs->ctr = kvmppc_get_ctr(vcpu);
429         regs->lr = kvmppc_get_lr(vcpu);
430         regs->xer = kvmppc_get_xer(vcpu);
431         regs->msr = vcpu->arch.shared->msr;
432         regs->srr0 = vcpu->arch.shared->srr0;
433         regs->srr1 = vcpu->arch.shared->srr1;
434         regs->pid = vcpu->arch.pid;
435         regs->sprg0 = vcpu->arch.shared->sprg0;
436         regs->sprg1 = vcpu->arch.shared->sprg1;
437         regs->sprg2 = vcpu->arch.shared->sprg2;
438         regs->sprg3 = vcpu->arch.shared->sprg3;
439         regs->sprg4 = vcpu->arch.shared->sprg4;
440         regs->sprg5 = vcpu->arch.shared->sprg5;
441         regs->sprg6 = vcpu->arch.shared->sprg6;
442         regs->sprg7 = vcpu->arch.shared->sprg7;
443
444         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
445                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
446
447         return 0;
448 }
449
450 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
451 {
452         int i;
453
454         kvmppc_set_pc(vcpu, regs->pc);
455         kvmppc_set_cr(vcpu, regs->cr);
456         kvmppc_set_ctr(vcpu, regs->ctr);
457         kvmppc_set_lr(vcpu, regs->lr);
458         kvmppc_set_xer(vcpu, regs->xer);
459         kvmppc_set_msr(vcpu, regs->msr);
460         vcpu->arch.shared->srr0 = regs->srr0;
461         vcpu->arch.shared->srr1 = regs->srr1;
462         vcpu->arch.shared->sprg0 = regs->sprg0;
463         vcpu->arch.shared->sprg1 = regs->sprg1;
464         vcpu->arch.shared->sprg2 = regs->sprg2;
465         vcpu->arch.shared->sprg3 = regs->sprg3;
466         vcpu->arch.shared->sprg4 = regs->sprg4;
467         vcpu->arch.shared->sprg5 = regs->sprg5;
468         vcpu->arch.shared->sprg6 = regs->sprg6;
469         vcpu->arch.shared->sprg7 = regs->sprg7;
470
471         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
472                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
473
474         return 0;
475 }
476
477 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
478 {
479         return -ENOTSUPP;
480 }
481
482 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
483 {
484         return -ENOTSUPP;
485 }
486
487 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
488 {
489         int r;
490         union kvmppc_one_reg val;
491         int size;
492         long int i;
493
494         size = one_reg_size(reg->id);
495         if (size > sizeof(val))
496                 return -EINVAL;
497
498         r = kvmppc_get_one_reg(vcpu, reg->id, &val);
499
500         if (r == -EINVAL) {
501                 r = 0;
502                 switch (reg->id) {
503                 case KVM_REG_PPC_DAR:
504                         val = get_reg_val(reg->id, vcpu->arch.shared->dar);
505                         break;
506                 case KVM_REG_PPC_DSISR:
507                         val = get_reg_val(reg->id, vcpu->arch.shared->dsisr);
508                         break;
509                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
510                         i = reg->id - KVM_REG_PPC_FPR0;
511                         val = get_reg_val(reg->id, vcpu->arch.fpr[i]);
512                         break;
513                 case KVM_REG_PPC_FPSCR:
514                         val = get_reg_val(reg->id, vcpu->arch.fpscr);
515                         break;
516 #ifdef CONFIG_ALTIVEC
517                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
518                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
519                                 r = -ENXIO;
520                                 break;
521                         }
522                         val.vval = vcpu->arch.vr[reg->id - KVM_REG_PPC_VR0];
523                         break;
524                 case KVM_REG_PPC_VSCR:
525                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
526                                 r = -ENXIO;
527                                 break;
528                         }
529                         val = get_reg_val(reg->id, vcpu->arch.vscr.u[3]);
530                         break;
531 #endif /* CONFIG_ALTIVEC */
532                 case KVM_REG_PPC_DEBUG_INST: {
533                         u32 opcode = INS_TW;
534                         r = copy_to_user((u32 __user *)(long)reg->addr,
535                                          &opcode, sizeof(u32));
536                         break;
537                 }
538 #ifdef CONFIG_KVM_XICS
539                 case KVM_REG_PPC_ICP_STATE:
540                         if (!vcpu->arch.icp) {
541                                 r = -ENXIO;
542                                 break;
543                         }
544                         val = get_reg_val(reg->id, kvmppc_xics_get_icp(vcpu));
545                         break;
546 #endif /* CONFIG_KVM_XICS */
547                 default:
548                         r = -EINVAL;
549                         break;
550                 }
551         }
552         if (r)
553                 return r;
554
555         if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
556                 r = -EFAULT;
557
558         return r;
559 }
560
561 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
562 {
563         int r;
564         union kvmppc_one_reg val;
565         int size;
566         long int i;
567
568         size = one_reg_size(reg->id);
569         if (size > sizeof(val))
570                 return -EINVAL;
571
572         if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
573                 return -EFAULT;
574
575         r = kvmppc_set_one_reg(vcpu, reg->id, &val);
576
577         if (r == -EINVAL) {
578                 r = 0;
579                 switch (reg->id) {
580                 case KVM_REG_PPC_DAR:
581                         vcpu->arch.shared->dar = set_reg_val(reg->id, val);
582                         break;
583                 case KVM_REG_PPC_DSISR:
584                         vcpu->arch.shared->dsisr = set_reg_val(reg->id, val);
585                         break;
586                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
587                         i = reg->id - KVM_REG_PPC_FPR0;
588                         vcpu->arch.fpr[i] = set_reg_val(reg->id, val);
589                         break;
590                 case KVM_REG_PPC_FPSCR:
591                         vcpu->arch.fpscr = set_reg_val(reg->id, val);
592                         break;
593 #ifdef CONFIG_ALTIVEC
594                 case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
595                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
596                                 r = -ENXIO;
597                                 break;
598                         }
599                         vcpu->arch.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
600                         break;
601                 case KVM_REG_PPC_VSCR:
602                         if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
603                                 r = -ENXIO;
604                                 break;
605                         }
606                         vcpu->arch.vscr.u[3] = set_reg_val(reg->id, val);
607                         break;
608 #endif /* CONFIG_ALTIVEC */
609 #ifdef CONFIG_KVM_XICS
610                 case KVM_REG_PPC_ICP_STATE:
611                         if (!vcpu->arch.icp) {
612                                 r = -ENXIO;
613                                 break;
614                         }
615                         r = kvmppc_xics_set_icp(vcpu,
616                                                 set_reg_val(reg->id, val));
617                         break;
618 #endif /* CONFIG_KVM_XICS */
619                 default:
620                         r = -EINVAL;
621                         break;
622                 }
623         }
624
625         return r;
626 }
627
628 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
629                                   struct kvm_translation *tr)
630 {
631         return 0;
632 }
633
634 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
635                                         struct kvm_guest_debug *dbg)
636 {
637         return -EINVAL;
638 }
639
640 void kvmppc_decrementer_func(unsigned long data)
641 {
642         struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
643
644         kvmppc_core_queue_dec(vcpu);
645         kvm_vcpu_kick(vcpu);
646 }