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Linux/arch/powerpc/kvm/book3s.c

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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 #include <linux/module.h>
 22 #include <linux/miscdevice.h>
 23 
 24 #include <asm/reg.h>
 25 #include <asm/cputable.h>
 26 #include <asm/cacheflush.h>
 27 #include <asm/tlbflush.h>
 28 #include <asm/uaccess.h>
 29 #include <asm/io.h>
 30 #include <asm/kvm_ppc.h>
 31 #include <asm/kvm_book3s.h>
 32 #include <asm/mmu_context.h>
 33 #include <asm/page.h>
 34 #include <linux/gfp.h>
 35 #include <linux/sched.h>
 36 #include <linux/vmalloc.h>
 37 #include <linux/highmem.h>
 38 
 39 #include "book3s.h"
 40 #include "trace.h"
 41 
 42 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
 43 
 44 /* #define EXIT_DEBUG */
 45 
 46 struct kvm_stats_debugfs_item debugfs_entries[] = {
 47         { "exits",       VCPU_STAT(sum_exits) },
 48         { "mmio",        VCPU_STAT(mmio_exits) },
 49         { "sig",         VCPU_STAT(signal_exits) },
 50         { "sysc",        VCPU_STAT(syscall_exits) },
 51         { "inst_emu",    VCPU_STAT(emulated_inst_exits) },
 52         { "dec",         VCPU_STAT(dec_exits) },
 53         { "ext_intr",    VCPU_STAT(ext_intr_exits) },
 54         { "queue_intr",  VCPU_STAT(queue_intr) },
 55         { "halt_successful_poll", VCPU_STAT(halt_successful_poll), },
 56         { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll), },
 57         { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
 58         { "halt_wakeup", VCPU_STAT(halt_wakeup) },
 59         { "pf_storage",  VCPU_STAT(pf_storage) },
 60         { "sp_storage",  VCPU_STAT(sp_storage) },
 61         { "pf_instruc",  VCPU_STAT(pf_instruc) },
 62         { "sp_instruc",  VCPU_STAT(sp_instruc) },
 63         { "ld",          VCPU_STAT(ld) },
 64         { "ld_slow",     VCPU_STAT(ld_slow) },
 65         { "st",          VCPU_STAT(st) },
 66         { "st_slow",     VCPU_STAT(st_slow) },
 67         { NULL }
 68 };
 69 
 70 void kvmppc_unfixup_split_real(struct kvm_vcpu *vcpu)
 71 {
 72         if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) {
 73                 ulong pc = kvmppc_get_pc(vcpu);
 74                 if ((pc & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS)
 75                         kvmppc_set_pc(vcpu, pc & ~SPLIT_HACK_MASK);
 76                 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SPLIT_HACK;
 77         }
 78 }
 79 EXPORT_SYMBOL_GPL(kvmppc_unfixup_split_real);
 80 
 81 static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
 82 {
 83         if (!is_kvmppc_hv_enabled(vcpu->kvm))
 84                 return to_book3s(vcpu)->hior;
 85         return 0;
 86 }
 87 
 88 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
 89                         unsigned long pending_now, unsigned long old_pending)
 90 {
 91         if (is_kvmppc_hv_enabled(vcpu->kvm))
 92                 return;
 93         if (pending_now)
 94                 kvmppc_set_int_pending(vcpu, 1);
 95         else if (old_pending)
 96                 kvmppc_set_int_pending(vcpu, 0);
 97 }
 98 
 99 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
100 {
101         ulong crit_raw;
102         ulong crit_r1;
103         bool crit;
104 
105         if (is_kvmppc_hv_enabled(vcpu->kvm))
106                 return false;
107 
108         crit_raw = kvmppc_get_critical(vcpu);
109         crit_r1 = kvmppc_get_gpr(vcpu, 1);
110 
111         /* Truncate crit indicators in 32 bit mode */
112         if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
113                 crit_raw &= 0xffffffff;
114                 crit_r1 &= 0xffffffff;
115         }
116 
117         /* Critical section when crit == r1 */
118         crit = (crit_raw == crit_r1);
119         /* ... and we're in supervisor mode */
120         crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
121 
122         return crit;
123 }
124 
125 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
126 {
127         kvmppc_unfixup_split_real(vcpu);
128         kvmppc_set_srr0(vcpu, kvmppc_get_pc(vcpu));
129         kvmppc_set_srr1(vcpu, kvmppc_get_msr(vcpu) | flags);
130         kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
131         vcpu->arch.mmu.reset_msr(vcpu);
132 }
133 
134 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
135 {
136         unsigned int prio;
137 
138         switch (vec) {
139         case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET;         break;
140         case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK;        break;
141         case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE;         break;
142         case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT;         break;
143         case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE;         break;
144         case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT;         break;
145         case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL;             break;
146         case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL;       break;
147         case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT;            break;
148         case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM;              break;
149         case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL;           break;
150         case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER;          break;
151         case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL;              break;
152         case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG;                break;
153         case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC;              break;
154         case 0xf40: prio = BOOK3S_IRQPRIO_VSX;                  break;
155         case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL;          break;
156         default:    prio = BOOK3S_IRQPRIO_MAX;                  break;
157         }
158 
159         return prio;
160 }
161 
162 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
163                                           unsigned int vec)
164 {
165         unsigned long old_pending = vcpu->arch.pending_exceptions;
166 
167         clear_bit(kvmppc_book3s_vec2irqprio(vec),
168                   &vcpu->arch.pending_exceptions);
169 
170         kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
171                                   old_pending);
172 }
173 
174 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
175 {
176         vcpu->stat.queue_intr++;
177 
178         set_bit(kvmppc_book3s_vec2irqprio(vec),
179                 &vcpu->arch.pending_exceptions);
180 #ifdef EXIT_DEBUG
181         printk(KERN_INFO "Queueing interrupt %x\n", vec);
182 #endif
183 }
184 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
185 
186 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
187 {
188         /* might as well deliver this straight away */
189         kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
190 }
191 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
192 
193 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
194 {
195         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
196 }
197 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
198 
199 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
200 {
201         return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
202 }
203 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
204 
205 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
206 {
207         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
208 }
209 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
210 
211 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
212                                 struct kvm_interrupt *irq)
213 {
214         unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
215 
216         if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
217                 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
218 
219         kvmppc_book3s_queue_irqprio(vcpu, vec);
220 }
221 
222 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
223 {
224         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
225         kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
226 }
227 
228 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
229                                     ulong flags)
230 {
231         kvmppc_set_dar(vcpu, dar);
232         kvmppc_set_dsisr(vcpu, flags);
233         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE);
234 }
235 
236 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
237 {
238         u64 msr = kvmppc_get_msr(vcpu);
239         msr &= ~(SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
240         msr |= flags & (SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
241         kvmppc_set_msr_fast(vcpu, msr);
242         kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
243 }
244 
245 static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu,
246                                          unsigned int priority)
247 {
248         int deliver = 1;
249         int vec = 0;
250         bool crit = kvmppc_critical_section(vcpu);
251 
252         switch (priority) {
253         case BOOK3S_IRQPRIO_DECREMENTER:
254                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
255                 vec = BOOK3S_INTERRUPT_DECREMENTER;
256                 break;
257         case BOOK3S_IRQPRIO_EXTERNAL:
258         case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
259                 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
260                 vec = BOOK3S_INTERRUPT_EXTERNAL;
261                 break;
262         case BOOK3S_IRQPRIO_SYSTEM_RESET:
263                 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
264                 break;
265         case BOOK3S_IRQPRIO_MACHINE_CHECK:
266                 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
267                 break;
268         case BOOK3S_IRQPRIO_DATA_STORAGE:
269                 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
270                 break;
271         case BOOK3S_IRQPRIO_INST_STORAGE:
272                 vec = BOOK3S_INTERRUPT_INST_STORAGE;
273                 break;
274         case BOOK3S_IRQPRIO_DATA_SEGMENT:
275                 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
276                 break;
277         case BOOK3S_IRQPRIO_INST_SEGMENT:
278                 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
279                 break;
280         case BOOK3S_IRQPRIO_ALIGNMENT:
281                 vec = BOOK3S_INTERRUPT_ALIGNMENT;
282                 break;
283         case BOOK3S_IRQPRIO_PROGRAM:
284                 vec = BOOK3S_INTERRUPT_PROGRAM;
285                 break;
286         case BOOK3S_IRQPRIO_VSX:
287                 vec = BOOK3S_INTERRUPT_VSX;
288                 break;
289         case BOOK3S_IRQPRIO_ALTIVEC:
290                 vec = BOOK3S_INTERRUPT_ALTIVEC;
291                 break;
292         case BOOK3S_IRQPRIO_FP_UNAVAIL:
293                 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
294                 break;
295         case BOOK3S_IRQPRIO_SYSCALL:
296                 vec = BOOK3S_INTERRUPT_SYSCALL;
297                 break;
298         case BOOK3S_IRQPRIO_DEBUG:
299                 vec = BOOK3S_INTERRUPT_TRACE;
300                 break;
301         case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
302                 vec = BOOK3S_INTERRUPT_PERFMON;
303                 break;
304         case BOOK3S_IRQPRIO_FAC_UNAVAIL:
305                 vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
306                 break;
307         default:
308                 deliver = 0;
309                 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
310                 break;
311         }
312 
313 #if 0
314         printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
315 #endif
316 
317         if (deliver)
318                 kvmppc_inject_interrupt(vcpu, vec, 0);
319 
320         return deliver;
321 }
322 
323 /*
324  * This function determines if an irqprio should be cleared once issued.
325  */
326 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
327 {
328         switch (priority) {
329                 case BOOK3S_IRQPRIO_DECREMENTER:
330                         /* DEC interrupts get cleared by mtdec */
331                         return false;
332                 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
333                         /* External interrupts get cleared by userspace */
334                         return false;
335         }
336 
337         return true;
338 }
339 
340 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
341 {
342         unsigned long *pending = &vcpu->arch.pending_exceptions;
343         unsigned long old_pending = vcpu->arch.pending_exceptions;
344         unsigned int priority;
345 
346 #ifdef EXIT_DEBUG
347         if (vcpu->arch.pending_exceptions)
348                 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
349 #endif
350         priority = __ffs(*pending);
351         while (priority < BOOK3S_IRQPRIO_MAX) {
352                 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
353                     clear_irqprio(vcpu, priority)) {
354                         clear_bit(priority, &vcpu->arch.pending_exceptions);
355                         break;
356                 }
357 
358                 priority = find_next_bit(pending,
359                                          BITS_PER_BYTE * sizeof(*pending),
360                                          priority + 1);
361         }
362 
363         /* Tell the guest about our interrupt status */
364         kvmppc_update_int_pending(vcpu, *pending, old_pending);
365 
366         return 0;
367 }
368 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
369 
370 kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
371                         bool *writable)
372 {
373         ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
374         gfn_t gfn = gpa >> PAGE_SHIFT;
375 
376         if (!(kvmppc_get_msr(vcpu) & MSR_SF))
377                 mp_pa = (uint32_t)mp_pa;
378 
379         /* Magic page override */
380         gpa &= ~0xFFFULL;
381         if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
382                 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
383                 kvm_pfn_t pfn;
384 
385                 pfn = (kvm_pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
386                 get_page(pfn_to_page(pfn));
387                 if (writable)
388                         *writable = true;
389                 return pfn;
390         }
391 
392         return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
393 }
394 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
395 
396 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
397                  enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
398 {
399         bool data = (xlid == XLATE_DATA);
400         bool iswrite = (xlrw == XLATE_WRITE);
401         int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
402         int r;
403 
404         if (relocated) {
405                 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
406         } else {
407                 pte->eaddr = eaddr;
408                 pte->raddr = eaddr & KVM_PAM;
409                 pte->vpage = VSID_REAL | eaddr >> 12;
410                 pte->may_read = true;
411                 pte->may_write = true;
412                 pte->may_execute = true;
413                 r = 0;
414 
415                 if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
416                     !data) {
417                         if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
418                             ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
419                         pte->raddr &= ~SPLIT_HACK_MASK;
420                 }
421         }
422 
423         return r;
424 }
425 
426 int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, enum instruction_type type,
427                                          u32 *inst)
428 {
429         ulong pc = kvmppc_get_pc(vcpu);
430         int r;
431 
432         if (type == INST_SC)
433                 pc -= 4;
434 
435         r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
436         if (r == EMULATE_DONE)
437                 return r;
438         else
439                 return EMULATE_AGAIN;
440 }
441 EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);
442 
443 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
444 {
445         return 0;
446 }
447 
448 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
449 {
450         return 0;
451 }
452 
453 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
454 {
455 }
456 
457 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
458                                   struct kvm_sregs *sregs)
459 {
460         return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
461 }
462 
463 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
464                                   struct kvm_sregs *sregs)
465 {
466         return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
467 }
468 
469 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
470 {
471         int i;
472 
473         regs->pc = kvmppc_get_pc(vcpu);
474         regs->cr = kvmppc_get_cr(vcpu);
475         regs->ctr = kvmppc_get_ctr(vcpu);
476         regs->lr = kvmppc_get_lr(vcpu);
477         regs->xer = kvmppc_get_xer(vcpu);
478         regs->msr = kvmppc_get_msr(vcpu);
479         regs->srr0 = kvmppc_get_srr0(vcpu);
480         regs->srr1 = kvmppc_get_srr1(vcpu);
481         regs->pid = vcpu->arch.pid;
482         regs->sprg0 = kvmppc_get_sprg0(vcpu);
483         regs->sprg1 = kvmppc_get_sprg1(vcpu);
484         regs->sprg2 = kvmppc_get_sprg2(vcpu);
485         regs->sprg3 = kvmppc_get_sprg3(vcpu);
486         regs->sprg4 = kvmppc_get_sprg4(vcpu);
487         regs->sprg5 = kvmppc_get_sprg5(vcpu);
488         regs->sprg6 = kvmppc_get_sprg6(vcpu);
489         regs->sprg7 = kvmppc_get_sprg7(vcpu);
490 
491         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
492                 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
493 
494         return 0;
495 }
496 
497 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
498 {
499         int i;
500 
501         kvmppc_set_pc(vcpu, regs->pc);
502         kvmppc_set_cr(vcpu, regs->cr);
503         kvmppc_set_ctr(vcpu, regs->ctr);
504         kvmppc_set_lr(vcpu, regs->lr);
505         kvmppc_set_xer(vcpu, regs->xer);
506         kvmppc_set_msr(vcpu, regs->msr);
507         kvmppc_set_srr0(vcpu, regs->srr0);
508         kvmppc_set_srr1(vcpu, regs->srr1);
509         kvmppc_set_sprg0(vcpu, regs->sprg0);
510         kvmppc_set_sprg1(vcpu, regs->sprg1);
511         kvmppc_set_sprg2(vcpu, regs->sprg2);
512         kvmppc_set_sprg3(vcpu, regs->sprg3);
513         kvmppc_set_sprg4(vcpu, regs->sprg4);
514         kvmppc_set_sprg5(vcpu, regs->sprg5);
515         kvmppc_set_sprg6(vcpu, regs->sprg6);
516         kvmppc_set_sprg7(vcpu, regs->sprg7);
517 
518         for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
519                 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
520 
521         return 0;
522 }
523 
524 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
525 {
526         return -ENOTSUPP;
527 }
528 
529 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
530 {
531         return -ENOTSUPP;
532 }
533 
534 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
535                         union kvmppc_one_reg *val)
536 {
537         int r = 0;
538         long int i;
539 
540         r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
541         if (r == -EINVAL) {
542                 r = 0;
543                 switch (id) {
544                 case KVM_REG_PPC_DAR:
545                         *val = get_reg_val(id, kvmppc_get_dar(vcpu));
546                         break;
547                 case KVM_REG_PPC_DSISR:
548                         *val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
549                         break;
550                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
551                         i = id - KVM_REG_PPC_FPR0;
552                         *val = get_reg_val(id, VCPU_FPR(vcpu, i));
553                         break;
554                 case KVM_REG_PPC_FPSCR:
555                         *val = get_reg_val(id, vcpu->arch.fp.fpscr);
556                         break;
557 #ifdef CONFIG_VSX
558                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
559                         if (cpu_has_feature(CPU_FTR_VSX)) {
560                                 i = id - KVM_REG_PPC_VSR0;
561                                 val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
562                                 val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
563                         } else {
564                                 r = -ENXIO;
565                         }
566                         break;
567 #endif /* CONFIG_VSX */
568                 case KVM_REG_PPC_DEBUG_INST:
569                         *val = get_reg_val(id, INS_TW);
570                         break;
571 #ifdef CONFIG_KVM_XICS
572                 case KVM_REG_PPC_ICP_STATE:
573                         if (!vcpu->arch.icp) {
574                                 r = -ENXIO;
575                                 break;
576                         }
577                         *val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
578                         break;
579 #endif /* CONFIG_KVM_XICS */
580                 case KVM_REG_PPC_FSCR:
581                         *val = get_reg_val(id, vcpu->arch.fscr);
582                         break;
583                 case KVM_REG_PPC_TAR:
584                         *val = get_reg_val(id, vcpu->arch.tar);
585                         break;
586                 case KVM_REG_PPC_EBBHR:
587                         *val = get_reg_val(id, vcpu->arch.ebbhr);
588                         break;
589                 case KVM_REG_PPC_EBBRR:
590                         *val = get_reg_val(id, vcpu->arch.ebbrr);
591                         break;
592                 case KVM_REG_PPC_BESCR:
593                         *val = get_reg_val(id, vcpu->arch.bescr);
594                         break;
595                 case KVM_REG_PPC_VTB:
596                         *val = get_reg_val(id, vcpu->arch.vtb);
597                         break;
598                 case KVM_REG_PPC_IC:
599                         *val = get_reg_val(id, vcpu->arch.ic);
600                         break;
601                 default:
602                         r = -EINVAL;
603                         break;
604                 }
605         }
606 
607         return r;
608 }
609 
610 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
611                         union kvmppc_one_reg *val)
612 {
613         int r = 0;
614         long int i;
615 
616         r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
617         if (r == -EINVAL) {
618                 r = 0;
619                 switch (id) {
620                 case KVM_REG_PPC_DAR:
621                         kvmppc_set_dar(vcpu, set_reg_val(id, *val));
622                         break;
623                 case KVM_REG_PPC_DSISR:
624                         kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
625                         break;
626                 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
627                         i = id - KVM_REG_PPC_FPR0;
628                         VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
629                         break;
630                 case KVM_REG_PPC_FPSCR:
631                         vcpu->arch.fp.fpscr = set_reg_val(id, *val);
632                         break;
633 #ifdef CONFIG_VSX
634                 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
635                         if (cpu_has_feature(CPU_FTR_VSX)) {
636                                 i = id - KVM_REG_PPC_VSR0;
637                                 vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
638                                 vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
639                         } else {
640                                 r = -ENXIO;
641                         }
642                         break;
643 #endif /* CONFIG_VSX */
644 #ifdef CONFIG_KVM_XICS
645                 case KVM_REG_PPC_ICP_STATE:
646                         if (!vcpu->arch.icp) {
647                                 r = -ENXIO;
648                                 break;
649                         }
650                         r = kvmppc_xics_set_icp(vcpu,
651                                                 set_reg_val(id, *val));
652                         break;
653 #endif /* CONFIG_KVM_XICS */
654                 case KVM_REG_PPC_FSCR:
655                         vcpu->arch.fscr = set_reg_val(id, *val);
656                         break;
657                 case KVM_REG_PPC_TAR:
658                         vcpu->arch.tar = set_reg_val(id, *val);
659                         break;
660                 case KVM_REG_PPC_EBBHR:
661                         vcpu->arch.ebbhr = set_reg_val(id, *val);
662                         break;
663                 case KVM_REG_PPC_EBBRR:
664                         vcpu->arch.ebbrr = set_reg_val(id, *val);
665                         break;
666                 case KVM_REG_PPC_BESCR:
667                         vcpu->arch.bescr = set_reg_val(id, *val);
668                         break;
669                 case KVM_REG_PPC_VTB:
670                         vcpu->arch.vtb = set_reg_val(id, *val);
671                         break;
672                 case KVM_REG_PPC_IC:
673                         vcpu->arch.ic = set_reg_val(id, *val);
674                         break;
675                 default:
676                         r = -EINVAL;
677                         break;
678                 }
679         }
680 
681         return r;
682 }
683 
684 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
685 {
686         vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
687 }
688 
689 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
690 {
691         vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
692 }
693 
694 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
695 {
696         vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
697 }
698 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
699 
700 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
701 {
702         return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
703 }
704 
705 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
706                                   struct kvm_translation *tr)
707 {
708         return 0;
709 }
710 
711 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
712                                         struct kvm_guest_debug *dbg)
713 {
714         vcpu->guest_debug = dbg->control;
715         return 0;
716 }
717 
718 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
719 {
720         kvmppc_core_queue_dec(vcpu);
721         kvm_vcpu_kick(vcpu);
722 }
723 
724 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
725 {
726         return kvm->arch.kvm_ops->vcpu_create(kvm, id);
727 }
728 
729 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
730 {
731         vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
732 }
733 
734 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
735 {
736         return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
737 }
738 
739 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
740 {
741         return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
742 }
743 
744 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
745                               struct kvm_memory_slot *dont)
746 {
747         kvm->arch.kvm_ops->free_memslot(free, dont);
748 }
749 
750 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
751                                unsigned long npages)
752 {
753         return kvm->arch.kvm_ops->create_memslot(slot, npages);
754 }
755 
756 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
757 {
758         kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
759 }
760 
761 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
762                                 struct kvm_memory_slot *memslot,
763                                 const struct kvm_userspace_memory_region *mem)
764 {
765         return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
766 }
767 
768 void kvmppc_core_commit_memory_region(struct kvm *kvm,
769                                 const struct kvm_userspace_memory_region *mem,
770                                 const struct kvm_memory_slot *old,
771                                 const struct kvm_memory_slot *new)
772 {
773         kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new);
774 }
775 
776 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
777 {
778         return kvm->arch.kvm_ops->unmap_hva(kvm, hva);
779 }
780 EXPORT_SYMBOL_GPL(kvm_unmap_hva);
781 
782 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
783 {
784         return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
785 }
786 
787 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
788 {
789         return kvm->arch.kvm_ops->age_hva(kvm, start, end);
790 }
791 
792 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
793 {
794         return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
795 }
796 
797 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
798 {
799         kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
800 }
801 
802 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
803 {
804         vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
805 }
806 
807 int kvmppc_core_init_vm(struct kvm *kvm)
808 {
809 
810 #ifdef CONFIG_PPC64
811         INIT_LIST_HEAD_RCU(&kvm->arch.spapr_tce_tables);
812         INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
813 #endif
814 
815         return kvm->arch.kvm_ops->init_vm(kvm);
816 }
817 
818 void kvmppc_core_destroy_vm(struct kvm *kvm)
819 {
820         kvm->arch.kvm_ops->destroy_vm(kvm);
821 
822 #ifdef CONFIG_PPC64
823         kvmppc_rtas_tokens_free(kvm);
824         WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
825 #endif
826 }
827 
828 int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu)
829 {
830         unsigned long size = kvmppc_get_gpr(vcpu, 4);
831         unsigned long addr = kvmppc_get_gpr(vcpu, 5);
832         u64 buf;
833         int srcu_idx;
834         int ret;
835 
836         if (!is_power_of_2(size) || (size > sizeof(buf)))
837                 return H_TOO_HARD;
838 
839         srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
840         ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf);
841         srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
842         if (ret != 0)
843                 return H_TOO_HARD;
844 
845         switch (size) {
846         case 1:
847                 kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf);
848                 break;
849 
850         case 2:
851                 kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf));
852                 break;
853 
854         case 4:
855                 kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf));
856                 break;
857 
858         case 8:
859                 kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf));
860                 break;
861 
862         default:
863                 BUG();
864         }
865 
866         return H_SUCCESS;
867 }
868 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load);
869 
870 int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu)
871 {
872         unsigned long size = kvmppc_get_gpr(vcpu, 4);
873         unsigned long addr = kvmppc_get_gpr(vcpu, 5);
874         unsigned long val = kvmppc_get_gpr(vcpu, 6);
875         u64 buf;
876         int srcu_idx;
877         int ret;
878 
879         switch (size) {
880         case 1:
881                 *(u8 *)&buf = val;
882                 break;
883 
884         case 2:
885                 *(__be16 *)&buf = cpu_to_be16(val);
886                 break;
887 
888         case 4:
889                 *(__be32 *)&buf = cpu_to_be32(val);
890                 break;
891 
892         case 8:
893                 *(__be64 *)&buf = cpu_to_be64(val);
894                 break;
895 
896         default:
897                 return H_TOO_HARD;
898         }
899 
900         srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
901         ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf);
902         srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
903         if (ret != 0)
904                 return H_TOO_HARD;
905 
906         return H_SUCCESS;
907 }
908 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store);
909 
910 int kvmppc_core_check_processor_compat(void)
911 {
912         /*
913          * We always return 0 for book3s. We check
914          * for compatibility while loading the HV
915          * or PR module
916          */
917         return 0;
918 }
919 
920 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
921 {
922         return kvm->arch.kvm_ops->hcall_implemented(hcall);
923 }
924 
925 static int kvmppc_book3s_init(void)
926 {
927         int r;
928 
929         r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
930         if (r)
931                 return r;
932 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
933         r = kvmppc_book3s_init_pr();
934 #endif
935         return r;
936 
937 }
938 
939 static void kvmppc_book3s_exit(void)
940 {
941 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
942         kvmppc_book3s_exit_pr();
943 #endif
944         kvm_exit();
945 }
946 
947 module_init(kvmppc_book3s_init);
948 module_exit(kvmppc_book3s_exit);
949 
950 /* On 32bit this is our one and only kernel module */
951 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
952 MODULE_ALIAS_MISCDEV(KVM_MINOR);
953 MODULE_ALIAS("devname:kvm");
954 #endif
955 

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