CONFIG_FILE_LOCKING should not depend on CONFIG_BLOCK
[sfrench/cifs-2.6.git] / arch / powerpc / kvm / booke.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/module.h>
25 #include <linux/vmalloc.h>
26 #include <linux/fs.h>
27
28 #include <asm/cputable.h>
29 #include <asm/uaccess.h>
30 #include <asm/kvm_ppc.h>
31 #include "timing.h"
32 #include <asm/cacheflush.h>
33
34 #include "booke.h"
35
36 unsigned long kvmppc_booke_handlers;
37
38 #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM
39 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
40
41 struct kvm_stats_debugfs_item debugfs_entries[] = {
42         { "mmio",       VCPU_STAT(mmio_exits) },
43         { "dcr",        VCPU_STAT(dcr_exits) },
44         { "sig",        VCPU_STAT(signal_exits) },
45         { "itlb_r",     VCPU_STAT(itlb_real_miss_exits) },
46         { "itlb_v",     VCPU_STAT(itlb_virt_miss_exits) },
47         { "dtlb_r",     VCPU_STAT(dtlb_real_miss_exits) },
48         { "dtlb_v",     VCPU_STAT(dtlb_virt_miss_exits) },
49         { "sysc",       VCPU_STAT(syscall_exits) },
50         { "isi",        VCPU_STAT(isi_exits) },
51         { "dsi",        VCPU_STAT(dsi_exits) },
52         { "inst_emu",   VCPU_STAT(emulated_inst_exits) },
53         { "dec",        VCPU_STAT(dec_exits) },
54         { "ext_intr",   VCPU_STAT(ext_intr_exits) },
55         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
56         { NULL }
57 };
58
59 /* TODO: use vcpu_printf() */
60 void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu)
61 {
62         int i;
63
64         printk("pc:   %08lx msr:  %08lx\n", vcpu->arch.pc, vcpu->arch.msr);
65         printk("lr:   %08lx ctr:  %08lx\n", vcpu->arch.lr, vcpu->arch.ctr);
66         printk("srr0: %08lx srr1: %08lx\n", vcpu->arch.srr0, vcpu->arch.srr1);
67
68         printk("exceptions: %08lx\n", vcpu->arch.pending_exceptions);
69
70         for (i = 0; i < 32; i += 4) {
71                 printk("gpr%02d: %08lx %08lx %08lx %08lx\n", i,
72                        vcpu->arch.gpr[i],
73                        vcpu->arch.gpr[i+1],
74                        vcpu->arch.gpr[i+2],
75                        vcpu->arch.gpr[i+3]);
76         }
77 }
78
79 static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
80                                        unsigned int priority)
81 {
82         set_bit(priority, &vcpu->arch.pending_exceptions);
83 }
84
85 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu)
86 {
87         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
88 }
89
90 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
91 {
92         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DECREMENTER);
93 }
94
95 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
96 {
97         return test_bit(BOOKE_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
98 }
99
100 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
101                                 struct kvm_interrupt *irq)
102 {
103         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_EXTERNAL);
104 }
105
106 /* Deliver the interrupt of the corresponding priority, if possible. */
107 static int kvmppc_booke_irqprio_deliver(struct kvm_vcpu *vcpu,
108                                         unsigned int priority)
109 {
110         int allowed = 0;
111         ulong msr_mask;
112
113         switch (priority) {
114         case BOOKE_IRQPRIO_PROGRAM:
115         case BOOKE_IRQPRIO_DTLB_MISS:
116         case BOOKE_IRQPRIO_ITLB_MISS:
117         case BOOKE_IRQPRIO_SYSCALL:
118         case BOOKE_IRQPRIO_DATA_STORAGE:
119         case BOOKE_IRQPRIO_INST_STORAGE:
120         case BOOKE_IRQPRIO_FP_UNAVAIL:
121         case BOOKE_IRQPRIO_SPE_UNAVAIL:
122         case BOOKE_IRQPRIO_SPE_FP_DATA:
123         case BOOKE_IRQPRIO_SPE_FP_ROUND:
124         case BOOKE_IRQPRIO_AP_UNAVAIL:
125         case BOOKE_IRQPRIO_ALIGNMENT:
126                 allowed = 1;
127                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
128                 break;
129         case BOOKE_IRQPRIO_CRITICAL:
130         case BOOKE_IRQPRIO_WATCHDOG:
131                 allowed = vcpu->arch.msr & MSR_CE;
132                 msr_mask = MSR_ME;
133                 break;
134         case BOOKE_IRQPRIO_MACHINE_CHECK:
135                 allowed = vcpu->arch.msr & MSR_ME;
136                 msr_mask = 0;
137                 break;
138         case BOOKE_IRQPRIO_EXTERNAL:
139         case BOOKE_IRQPRIO_DECREMENTER:
140         case BOOKE_IRQPRIO_FIT:
141                 allowed = vcpu->arch.msr & MSR_EE;
142                 msr_mask = MSR_CE|MSR_ME|MSR_DE;
143                 break;
144         case BOOKE_IRQPRIO_DEBUG:
145                 allowed = vcpu->arch.msr & MSR_DE;
146                 msr_mask = MSR_ME;
147                 break;
148         }
149
150         if (allowed) {
151                 vcpu->arch.srr0 = vcpu->arch.pc;
152                 vcpu->arch.srr1 = vcpu->arch.msr;
153                 vcpu->arch.pc = vcpu->arch.ivpr | vcpu->arch.ivor[priority];
154                 kvmppc_set_msr(vcpu, vcpu->arch.msr & msr_mask);
155
156                 clear_bit(priority, &vcpu->arch.pending_exceptions);
157         }
158
159         return allowed;
160 }
161
162 /* Check pending exceptions and deliver one, if possible. */
163 void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
164 {
165         unsigned long *pending = &vcpu->arch.pending_exceptions;
166         unsigned int priority;
167
168         priority = __ffs(*pending);
169         while (priority <= BOOKE_IRQPRIO_MAX) {
170                 if (kvmppc_booke_irqprio_deliver(vcpu, priority))
171                         break;
172
173                 priority = find_next_bit(pending,
174                                          BITS_PER_BYTE * sizeof(*pending),
175                                          priority + 1);
176         }
177 }
178
179 /**
180  * kvmppc_handle_exit
181  *
182  * Return value is in the form (errcode<<2 | RESUME_FLAG_HOST | RESUME_FLAG_NV)
183  */
184 int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
185                        unsigned int exit_nr)
186 {
187         enum emulation_result er;
188         int r = RESUME_HOST;
189
190         /* update before a new last_exit_type is rewritten */
191         kvmppc_update_timing_stats(vcpu);
192
193         local_irq_enable();
194
195         run->exit_reason = KVM_EXIT_UNKNOWN;
196         run->ready_for_interrupt_injection = 1;
197
198         switch (exit_nr) {
199         case BOOKE_INTERRUPT_MACHINE_CHECK:
200                 printk("MACHINE CHECK: %lx\n", mfspr(SPRN_MCSR));
201                 kvmppc_dump_vcpu(vcpu);
202                 r = RESUME_HOST;
203                 break;
204
205         case BOOKE_INTERRUPT_EXTERNAL:
206                 kvmppc_account_exit(vcpu, EXT_INTR_EXITS);
207                 if (need_resched())
208                         cond_resched();
209                 r = RESUME_GUEST;
210                 break;
211
212         case BOOKE_INTERRUPT_DECREMENTER:
213                 /* Since we switched IVPR back to the host's value, the host
214                  * handled this interrupt the moment we enabled interrupts.
215                  * Now we just offer it a chance to reschedule the guest. */
216                 kvmppc_account_exit(vcpu, DEC_EXITS);
217                 if (need_resched())
218                         cond_resched();
219                 r = RESUME_GUEST;
220                 break;
221
222         case BOOKE_INTERRUPT_PROGRAM:
223                 if (vcpu->arch.msr & MSR_PR) {
224                         /* Program traps generated by user-level software must be handled
225                          * by the guest kernel. */
226                         vcpu->arch.esr = vcpu->arch.fault_esr;
227                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
228                         r = RESUME_GUEST;
229                         kvmppc_account_exit(vcpu, USR_PR_INST);
230                         break;
231                 }
232
233                 er = kvmppc_emulate_instruction(run, vcpu);
234                 switch (er) {
235                 case EMULATE_DONE:
236                         /* don't overwrite subtypes, just account kvm_stats */
237                         kvmppc_account_exit_stat(vcpu, EMULATED_INST_EXITS);
238                         /* Future optimization: only reload non-volatiles if
239                          * they were actually modified by emulation. */
240                         r = RESUME_GUEST_NV;
241                         break;
242                 case EMULATE_DO_DCR:
243                         run->exit_reason = KVM_EXIT_DCR;
244                         r = RESUME_HOST;
245                         break;
246                 case EMULATE_FAIL:
247                         /* XXX Deliver Program interrupt to guest. */
248                         printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
249                                __func__, vcpu->arch.pc, vcpu->arch.last_inst);
250                         /* For debugging, encode the failing instruction and
251                          * report it to userspace. */
252                         run->hw.hardware_exit_reason = ~0ULL << 32;
253                         run->hw.hardware_exit_reason |= vcpu->arch.last_inst;
254                         r = RESUME_HOST;
255                         break;
256                 default:
257                         BUG();
258                 }
259                 break;
260
261         case BOOKE_INTERRUPT_FP_UNAVAIL:
262                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_FP_UNAVAIL);
263                 kvmppc_account_exit(vcpu, FP_UNAVAIL);
264                 r = RESUME_GUEST;
265                 break;
266
267         case BOOKE_INTERRUPT_SPE_UNAVAIL:
268                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_UNAVAIL);
269                 r = RESUME_GUEST;
270                 break;
271
272         case BOOKE_INTERRUPT_SPE_FP_DATA:
273                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_DATA);
274                 r = RESUME_GUEST;
275                 break;
276
277         case BOOKE_INTERRUPT_SPE_FP_ROUND:
278                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SPE_FP_ROUND);
279                 r = RESUME_GUEST;
280                 break;
281
282         case BOOKE_INTERRUPT_DATA_STORAGE:
283                 vcpu->arch.dear = vcpu->arch.fault_dear;
284                 vcpu->arch.esr = vcpu->arch.fault_esr;
285                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DATA_STORAGE);
286                 kvmppc_account_exit(vcpu, DSI_EXITS);
287                 r = RESUME_GUEST;
288                 break;
289
290         case BOOKE_INTERRUPT_INST_STORAGE:
291                 vcpu->arch.esr = vcpu->arch.fault_esr;
292                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_INST_STORAGE);
293                 kvmppc_account_exit(vcpu, ISI_EXITS);
294                 r = RESUME_GUEST;
295                 break;
296
297         case BOOKE_INTERRUPT_SYSCALL:
298                 kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_SYSCALL);
299                 kvmppc_account_exit(vcpu, SYSCALL_EXITS);
300                 r = RESUME_GUEST;
301                 break;
302
303         case BOOKE_INTERRUPT_DTLB_MISS: {
304                 unsigned long eaddr = vcpu->arch.fault_dear;
305                 int gtlb_index;
306                 gpa_t gpaddr;
307                 gfn_t gfn;
308
309                 /* Check the guest TLB. */
310                 gtlb_index = kvmppc_mmu_dtlb_index(vcpu, eaddr);
311                 if (gtlb_index < 0) {
312                         /* The guest didn't have a mapping for it. */
313                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_DTLB_MISS);
314                         vcpu->arch.dear = vcpu->arch.fault_dear;
315                         vcpu->arch.esr = vcpu->arch.fault_esr;
316                         kvmppc_mmu_dtlb_miss(vcpu);
317                         kvmppc_account_exit(vcpu, DTLB_REAL_MISS_EXITS);
318                         r = RESUME_GUEST;
319                         break;
320                 }
321
322                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
323                 gfn = gpaddr >> PAGE_SHIFT;
324
325                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
326                         /* The guest TLB had a mapping, but the shadow TLB
327                          * didn't, and it is RAM. This could be because:
328                          * a) the entry is mapping the host kernel, or
329                          * b) the guest used a large mapping which we're faking
330                          * Either way, we need to satisfy the fault without
331                          * invoking the guest. */
332                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
333                         kvmppc_account_exit(vcpu, DTLB_VIRT_MISS_EXITS);
334                         r = RESUME_GUEST;
335                 } else {
336                         /* Guest has mapped and accessed a page which is not
337                          * actually RAM. */
338                         vcpu->arch.paddr_accessed = gpaddr;
339                         r = kvmppc_emulate_mmio(run, vcpu);
340                         kvmppc_account_exit(vcpu, MMIO_EXITS);
341                 }
342
343                 break;
344         }
345
346         case BOOKE_INTERRUPT_ITLB_MISS: {
347                 unsigned long eaddr = vcpu->arch.pc;
348                 gpa_t gpaddr;
349                 gfn_t gfn;
350                 int gtlb_index;
351
352                 r = RESUME_GUEST;
353
354                 /* Check the guest TLB. */
355                 gtlb_index = kvmppc_mmu_itlb_index(vcpu, eaddr);
356                 if (gtlb_index < 0) {
357                         /* The guest didn't have a mapping for it. */
358                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_ITLB_MISS);
359                         kvmppc_mmu_itlb_miss(vcpu);
360                         kvmppc_account_exit(vcpu, ITLB_REAL_MISS_EXITS);
361                         break;
362                 }
363
364                 kvmppc_account_exit(vcpu, ITLB_VIRT_MISS_EXITS);
365
366                 gpaddr = kvmppc_mmu_xlate(vcpu, gtlb_index, eaddr);
367                 gfn = gpaddr >> PAGE_SHIFT;
368
369                 if (kvm_is_visible_gfn(vcpu->kvm, gfn)) {
370                         /* The guest TLB had a mapping, but the shadow TLB
371                          * didn't. This could be because:
372                          * a) the entry is mapping the host kernel, or
373                          * b) the guest used a large mapping which we're faking
374                          * Either way, we need to satisfy the fault without
375                          * invoking the guest. */
376                         kvmppc_mmu_map(vcpu, eaddr, gpaddr, gtlb_index);
377                 } else {
378                         /* Guest mapped and leaped at non-RAM! */
379                         kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_MACHINE_CHECK);
380                 }
381
382                 break;
383         }
384
385         case BOOKE_INTERRUPT_DEBUG: {
386                 u32 dbsr;
387
388                 vcpu->arch.pc = mfspr(SPRN_CSRR0);
389
390                 /* clear IAC events in DBSR register */
391                 dbsr = mfspr(SPRN_DBSR);
392                 dbsr &= DBSR_IAC1 | DBSR_IAC2 | DBSR_IAC3 | DBSR_IAC4;
393                 mtspr(SPRN_DBSR, dbsr);
394
395                 run->exit_reason = KVM_EXIT_DEBUG;
396                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
397                 r = RESUME_HOST;
398                 break;
399         }
400
401         default:
402                 printk(KERN_EMERG "exit_nr %d\n", exit_nr);
403                 BUG();
404         }
405
406         local_irq_disable();
407
408         kvmppc_core_deliver_interrupts(vcpu);
409
410         if (!(r & RESUME_HOST)) {
411                 /* To avoid clobbering exit_reason, only check for signals if
412                  * we aren't already exiting to userspace for some other
413                  * reason. */
414                 if (signal_pending(current)) {
415                         run->exit_reason = KVM_EXIT_INTR;
416                         r = (-EINTR << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
417                         kvmppc_account_exit(vcpu, SIGNAL_EXITS);
418                 }
419         }
420
421         return r;
422 }
423
424 /* Initial guest state: 16MB mapping 0 -> 0, PC = 0, MSR = 0, R1 = 16MB */
425 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
426 {
427         vcpu->arch.pc = 0;
428         vcpu->arch.msr = 0;
429         vcpu->arch.gpr[1] = (16<<20) - 8; /* -8 for the callee-save LR slot */
430
431         vcpu->arch.shadow_pid = 1;
432
433         /* Eye-catching number so we know if the guest takes an interrupt
434          * before it's programmed its own IVPR. */
435         vcpu->arch.ivpr = 0x55550000;
436
437         kvmppc_init_timing_stats(vcpu);
438
439         return kvmppc_core_vcpu_setup(vcpu);
440 }
441
442 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
443 {
444         int i;
445
446         regs->pc = vcpu->arch.pc;
447         regs->cr = vcpu->arch.cr;
448         regs->ctr = vcpu->arch.ctr;
449         regs->lr = vcpu->arch.lr;
450         regs->xer = vcpu->arch.xer;
451         regs->msr = vcpu->arch.msr;
452         regs->srr0 = vcpu->arch.srr0;
453         regs->srr1 = vcpu->arch.srr1;
454         regs->pid = vcpu->arch.pid;
455         regs->sprg0 = vcpu->arch.sprg0;
456         regs->sprg1 = vcpu->arch.sprg1;
457         regs->sprg2 = vcpu->arch.sprg2;
458         regs->sprg3 = vcpu->arch.sprg3;
459         regs->sprg5 = vcpu->arch.sprg4;
460         regs->sprg6 = vcpu->arch.sprg5;
461         regs->sprg7 = vcpu->arch.sprg6;
462
463         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
464                 regs->gpr[i] = vcpu->arch.gpr[i];
465
466         return 0;
467 }
468
469 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
470 {
471         int i;
472
473         vcpu->arch.pc = regs->pc;
474         vcpu->arch.cr = regs->cr;
475         vcpu->arch.ctr = regs->ctr;
476         vcpu->arch.lr = regs->lr;
477         vcpu->arch.xer = regs->xer;
478         kvmppc_set_msr(vcpu, regs->msr);
479         vcpu->arch.srr0 = regs->srr0;
480         vcpu->arch.srr1 = regs->srr1;
481         vcpu->arch.sprg0 = regs->sprg0;
482         vcpu->arch.sprg1 = regs->sprg1;
483         vcpu->arch.sprg2 = regs->sprg2;
484         vcpu->arch.sprg3 = regs->sprg3;
485         vcpu->arch.sprg5 = regs->sprg4;
486         vcpu->arch.sprg6 = regs->sprg5;
487         vcpu->arch.sprg7 = regs->sprg6;
488
489         for (i = 0; i < ARRAY_SIZE(vcpu->arch.gpr); i++)
490                 vcpu->arch.gpr[i] = regs->gpr[i];
491
492         return 0;
493 }
494
495 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
496                                   struct kvm_sregs *sregs)
497 {
498         return -ENOTSUPP;
499 }
500
501 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
502                                   struct kvm_sregs *sregs)
503 {
504         return -ENOTSUPP;
505 }
506
507 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
508 {
509         return -ENOTSUPP;
510 }
511
512 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
513 {
514         return -ENOTSUPP;
515 }
516
517 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
518                                   struct kvm_translation *tr)
519 {
520         return kvmppc_core_vcpu_translate(vcpu, tr);
521 }
522
523 int kvmppc_booke_init(void)
524 {
525         unsigned long ivor[16];
526         unsigned long max_ivor = 0;
527         int i;
528
529         /* We install our own exception handlers by hijacking IVPR. IVPR must
530          * be 16-bit aligned, so we need a 64KB allocation. */
531         kvmppc_booke_handlers = __get_free_pages(GFP_KERNEL | __GFP_ZERO,
532                                                  VCPU_SIZE_ORDER);
533         if (!kvmppc_booke_handlers)
534                 return -ENOMEM;
535
536         /* XXX make sure our handlers are smaller than Linux's */
537
538         /* Copy our interrupt handlers to match host IVORs. That way we don't
539          * have to swap the IVORs on every guest/host transition. */
540         ivor[0] = mfspr(SPRN_IVOR0);
541         ivor[1] = mfspr(SPRN_IVOR1);
542         ivor[2] = mfspr(SPRN_IVOR2);
543         ivor[3] = mfspr(SPRN_IVOR3);
544         ivor[4] = mfspr(SPRN_IVOR4);
545         ivor[5] = mfspr(SPRN_IVOR5);
546         ivor[6] = mfspr(SPRN_IVOR6);
547         ivor[7] = mfspr(SPRN_IVOR7);
548         ivor[8] = mfspr(SPRN_IVOR8);
549         ivor[9] = mfspr(SPRN_IVOR9);
550         ivor[10] = mfspr(SPRN_IVOR10);
551         ivor[11] = mfspr(SPRN_IVOR11);
552         ivor[12] = mfspr(SPRN_IVOR12);
553         ivor[13] = mfspr(SPRN_IVOR13);
554         ivor[14] = mfspr(SPRN_IVOR14);
555         ivor[15] = mfspr(SPRN_IVOR15);
556
557         for (i = 0; i < 16; i++) {
558                 if (ivor[i] > max_ivor)
559                         max_ivor = ivor[i];
560
561                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
562                        kvmppc_handlers_start + i * kvmppc_handler_len,
563                        kvmppc_handler_len);
564         }
565         flush_icache_range(kvmppc_booke_handlers,
566                            kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
567
568         return 0;
569 }
570
571 void __exit kvmppc_booke_exit(void)
572 {
573         free_pages(kvmppc_booke_handlers, VCPU_SIZE_ORDER);
574         kvm_exit();
575 }