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Merge tag 'tty-4.3-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
[mirror_ubuntu-zesty-kernel.git] / arch / powerpc / kvm / book3s.c
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_wakeup", VCPU_STAT(halt_wakeup) },
58 { "pf_storage", VCPU_STAT(pf_storage) },
59 { "sp_storage", VCPU_STAT(sp_storage) },
60 { "pf_instruc", VCPU_STAT(pf_instruc) },
61 { "sp_instruc", VCPU_STAT(sp_instruc) },
62 { "ld", VCPU_STAT(ld) },
63 { "ld_slow", VCPU_STAT(ld_slow) },
64 { "st", VCPU_STAT(st) },
65 { "st_slow", VCPU_STAT(st_slow) },
66 { NULL }
67 };
68
69 void kvmppc_unfixup_split_real(struct kvm_vcpu *vcpu)
70 {
71 if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) {
72 ulong pc = kvmppc_get_pc(vcpu);
73 if ((pc & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS)
74 kvmppc_set_pc(vcpu, pc & ~SPLIT_HACK_MASK);
75 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SPLIT_HACK;
76 }
77 }
78 EXPORT_SYMBOL_GPL(kvmppc_unfixup_split_real);
79
80 static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
81 {
82 if (!is_kvmppc_hv_enabled(vcpu->kvm))
83 return to_book3s(vcpu)->hior;
84 return 0;
85 }
86
87 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
88 unsigned long pending_now, unsigned long old_pending)
89 {
90 if (is_kvmppc_hv_enabled(vcpu->kvm))
91 return;
92 if (pending_now)
93 kvmppc_set_int_pending(vcpu, 1);
94 else if (old_pending)
95 kvmppc_set_int_pending(vcpu, 0);
96 }
97
98 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
99 {
100 ulong crit_raw;
101 ulong crit_r1;
102 bool crit;
103
104 if (is_kvmppc_hv_enabled(vcpu->kvm))
105 return false;
106
107 crit_raw = kvmppc_get_critical(vcpu);
108 crit_r1 = kvmppc_get_gpr(vcpu, 1);
109
110 /* Truncate crit indicators in 32 bit mode */
111 if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
112 crit_raw &= 0xffffffff;
113 crit_r1 &= 0xffffffff;
114 }
115
116 /* Critical section when crit == r1 */
117 crit = (crit_raw == crit_r1);
118 /* ... and we're in supervisor mode */
119 crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
120
121 return crit;
122 }
123
124 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
125 {
126 kvmppc_unfixup_split_real(vcpu);
127 kvmppc_set_srr0(vcpu, kvmppc_get_pc(vcpu));
128 kvmppc_set_srr1(vcpu, kvmppc_get_msr(vcpu) | flags);
129 kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
130 vcpu->arch.mmu.reset_msr(vcpu);
131 }
132
133 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
134 {
135 unsigned int prio;
136
137 switch (vec) {
138 case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break;
139 case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break;
140 case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break;
141 case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break;
142 case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break;
143 case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break;
144 case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break;
145 case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL; break;
146 case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break;
147 case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break;
148 case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break;
149 case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break;
150 case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break;
151 case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break;
152 case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break;
153 case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break;
154 case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL; break;
155 default: prio = BOOK3S_IRQPRIO_MAX; break;
156 }
157
158 return prio;
159 }
160
161 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
162 unsigned int vec)
163 {
164 unsigned long old_pending = vcpu->arch.pending_exceptions;
165
166 clear_bit(kvmppc_book3s_vec2irqprio(vec),
167 &vcpu->arch.pending_exceptions);
168
169 kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
170 old_pending);
171 }
172
173 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
174 {
175 vcpu->stat.queue_intr++;
176
177 set_bit(kvmppc_book3s_vec2irqprio(vec),
178 &vcpu->arch.pending_exceptions);
179 #ifdef EXIT_DEBUG
180 printk(KERN_INFO "Queueing interrupt %x\n", vec);
181 #endif
182 }
183 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
184
185 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
186 {
187 /* might as well deliver this straight away */
188 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
189 }
190 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
191
192 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
193 {
194 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
195 }
196 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
197
198 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
199 {
200 return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
201 }
202 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
203
204 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
205 {
206 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
207 }
208 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
209
210 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
211 struct kvm_interrupt *irq)
212 {
213 unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
214
215 if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
216 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
217
218 kvmppc_book3s_queue_irqprio(vcpu, vec);
219 }
220
221 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
222 {
223 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
224 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
225 }
226
227 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
228 ulong flags)
229 {
230 kvmppc_set_dar(vcpu, dar);
231 kvmppc_set_dsisr(vcpu, flags);
232 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE);
233 }
234
235 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
236 {
237 u64 msr = kvmppc_get_msr(vcpu);
238 msr &= ~(SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
239 msr |= flags & (SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
240 kvmppc_set_msr_fast(vcpu, msr);
241 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
242 }
243
244 static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu,
245 unsigned int priority)
246 {
247 int deliver = 1;
248 int vec = 0;
249 bool crit = kvmppc_critical_section(vcpu);
250
251 switch (priority) {
252 case BOOK3S_IRQPRIO_DECREMENTER:
253 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
254 vec = BOOK3S_INTERRUPT_DECREMENTER;
255 break;
256 case BOOK3S_IRQPRIO_EXTERNAL:
257 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
258 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
259 vec = BOOK3S_INTERRUPT_EXTERNAL;
260 break;
261 case BOOK3S_IRQPRIO_SYSTEM_RESET:
262 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
263 break;
264 case BOOK3S_IRQPRIO_MACHINE_CHECK:
265 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
266 break;
267 case BOOK3S_IRQPRIO_DATA_STORAGE:
268 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
269 break;
270 case BOOK3S_IRQPRIO_INST_STORAGE:
271 vec = BOOK3S_INTERRUPT_INST_STORAGE;
272 break;
273 case BOOK3S_IRQPRIO_DATA_SEGMENT:
274 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
275 break;
276 case BOOK3S_IRQPRIO_INST_SEGMENT:
277 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
278 break;
279 case BOOK3S_IRQPRIO_ALIGNMENT:
280 vec = BOOK3S_INTERRUPT_ALIGNMENT;
281 break;
282 case BOOK3S_IRQPRIO_PROGRAM:
283 vec = BOOK3S_INTERRUPT_PROGRAM;
284 break;
285 case BOOK3S_IRQPRIO_VSX:
286 vec = BOOK3S_INTERRUPT_VSX;
287 break;
288 case BOOK3S_IRQPRIO_ALTIVEC:
289 vec = BOOK3S_INTERRUPT_ALTIVEC;
290 break;
291 case BOOK3S_IRQPRIO_FP_UNAVAIL:
292 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
293 break;
294 case BOOK3S_IRQPRIO_SYSCALL:
295 vec = BOOK3S_INTERRUPT_SYSCALL;
296 break;
297 case BOOK3S_IRQPRIO_DEBUG:
298 vec = BOOK3S_INTERRUPT_TRACE;
299 break;
300 case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
301 vec = BOOK3S_INTERRUPT_PERFMON;
302 break;
303 case BOOK3S_IRQPRIO_FAC_UNAVAIL:
304 vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
305 break;
306 default:
307 deliver = 0;
308 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
309 break;
310 }
311
312 #if 0
313 printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
314 #endif
315
316 if (deliver)
317 kvmppc_inject_interrupt(vcpu, vec, 0);
318
319 return deliver;
320 }
321
322 /*
323 * This function determines if an irqprio should be cleared once issued.
324 */
325 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
326 {
327 switch (priority) {
328 case BOOK3S_IRQPRIO_DECREMENTER:
329 /* DEC interrupts get cleared by mtdec */
330 return false;
331 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
332 /* External interrupts get cleared by userspace */
333 return false;
334 }
335
336 return true;
337 }
338
339 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
340 {
341 unsigned long *pending = &vcpu->arch.pending_exceptions;
342 unsigned long old_pending = vcpu->arch.pending_exceptions;
343 unsigned int priority;
344
345 #ifdef EXIT_DEBUG
346 if (vcpu->arch.pending_exceptions)
347 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
348 #endif
349 priority = __ffs(*pending);
350 while (priority < BOOK3S_IRQPRIO_MAX) {
351 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
352 clear_irqprio(vcpu, priority)) {
353 clear_bit(priority, &vcpu->arch.pending_exceptions);
354 break;
355 }
356
357 priority = find_next_bit(pending,
358 BITS_PER_BYTE * sizeof(*pending),
359 priority + 1);
360 }
361
362 /* Tell the guest about our interrupt status */
363 kvmppc_update_int_pending(vcpu, *pending, old_pending);
364
365 return 0;
366 }
367 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
368
369 pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
370 bool *writable)
371 {
372 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
373 gfn_t gfn = gpa >> PAGE_SHIFT;
374
375 if (!(kvmppc_get_msr(vcpu) & MSR_SF))
376 mp_pa = (uint32_t)mp_pa;
377
378 /* Magic page override */
379 gpa &= ~0xFFFULL;
380 if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
381 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
382 pfn_t pfn;
383
384 pfn = (pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
385 get_page(pfn_to_page(pfn));
386 if (writable)
387 *writable = true;
388 return pfn;
389 }
390
391 return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
392 }
393 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
394
395 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
396 enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
397 {
398 bool data = (xlid == XLATE_DATA);
399 bool iswrite = (xlrw == XLATE_WRITE);
400 int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
401 int r;
402
403 if (relocated) {
404 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
405 } else {
406 pte->eaddr = eaddr;
407 pte->raddr = eaddr & KVM_PAM;
408 pte->vpage = VSID_REAL | eaddr >> 12;
409 pte->may_read = true;
410 pte->may_write = true;
411 pte->may_execute = true;
412 r = 0;
413
414 if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
415 !data) {
416 if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
417 ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
418 pte->raddr &= ~SPLIT_HACK_MASK;
419 }
420 }
421
422 return r;
423 }
424
425 int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, enum instruction_type type,
426 u32 *inst)
427 {
428 ulong pc = kvmppc_get_pc(vcpu);
429 int r;
430
431 if (type == INST_SC)
432 pc -= 4;
433
434 r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
435 if (r == EMULATE_DONE)
436 return r;
437 else
438 return EMULATE_AGAIN;
439 }
440 EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);
441
442 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
443 {
444 return 0;
445 }
446
447 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
448 {
449 return 0;
450 }
451
452 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
453 {
454 }
455
456 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
457 struct kvm_sregs *sregs)
458 {
459 return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
460 }
461
462 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
463 struct kvm_sregs *sregs)
464 {
465 return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
466 }
467
468 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
469 {
470 int i;
471
472 regs->pc = kvmppc_get_pc(vcpu);
473 regs->cr = kvmppc_get_cr(vcpu);
474 regs->ctr = kvmppc_get_ctr(vcpu);
475 regs->lr = kvmppc_get_lr(vcpu);
476 regs->xer = kvmppc_get_xer(vcpu);
477 regs->msr = kvmppc_get_msr(vcpu);
478 regs->srr0 = kvmppc_get_srr0(vcpu);
479 regs->srr1 = kvmppc_get_srr1(vcpu);
480 regs->pid = vcpu->arch.pid;
481 regs->sprg0 = kvmppc_get_sprg0(vcpu);
482 regs->sprg1 = kvmppc_get_sprg1(vcpu);
483 regs->sprg2 = kvmppc_get_sprg2(vcpu);
484 regs->sprg3 = kvmppc_get_sprg3(vcpu);
485 regs->sprg4 = kvmppc_get_sprg4(vcpu);
486 regs->sprg5 = kvmppc_get_sprg5(vcpu);
487 regs->sprg6 = kvmppc_get_sprg6(vcpu);
488 regs->sprg7 = kvmppc_get_sprg7(vcpu);
489
490 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
491 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
492
493 return 0;
494 }
495
496 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
497 {
498 int i;
499
500 kvmppc_set_pc(vcpu, regs->pc);
501 kvmppc_set_cr(vcpu, regs->cr);
502 kvmppc_set_ctr(vcpu, regs->ctr);
503 kvmppc_set_lr(vcpu, regs->lr);
504 kvmppc_set_xer(vcpu, regs->xer);
505 kvmppc_set_msr(vcpu, regs->msr);
506 kvmppc_set_srr0(vcpu, regs->srr0);
507 kvmppc_set_srr1(vcpu, regs->srr1);
508 kvmppc_set_sprg0(vcpu, regs->sprg0);
509 kvmppc_set_sprg1(vcpu, regs->sprg1);
510 kvmppc_set_sprg2(vcpu, regs->sprg2);
511 kvmppc_set_sprg3(vcpu, regs->sprg3);
512 kvmppc_set_sprg4(vcpu, regs->sprg4);
513 kvmppc_set_sprg5(vcpu, regs->sprg5);
514 kvmppc_set_sprg6(vcpu, regs->sprg6);
515 kvmppc_set_sprg7(vcpu, regs->sprg7);
516
517 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
518 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
519
520 return 0;
521 }
522
523 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
524 {
525 return -ENOTSUPP;
526 }
527
528 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
529 {
530 return -ENOTSUPP;
531 }
532
533 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
534 union kvmppc_one_reg *val)
535 {
536 int r = 0;
537 long int i;
538
539 r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
540 if (r == -EINVAL) {
541 r = 0;
542 switch (id) {
543 case KVM_REG_PPC_DAR:
544 *val = get_reg_val(id, kvmppc_get_dar(vcpu));
545 break;
546 case KVM_REG_PPC_DSISR:
547 *val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
548 break;
549 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
550 i = id - KVM_REG_PPC_FPR0;
551 *val = get_reg_val(id, VCPU_FPR(vcpu, i));
552 break;
553 case KVM_REG_PPC_FPSCR:
554 *val = get_reg_val(id, vcpu->arch.fp.fpscr);
555 break;
556 #ifdef CONFIG_VSX
557 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
558 if (cpu_has_feature(CPU_FTR_VSX)) {
559 i = id - KVM_REG_PPC_VSR0;
560 val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
561 val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
562 } else {
563 r = -ENXIO;
564 }
565 break;
566 #endif /* CONFIG_VSX */
567 case KVM_REG_PPC_DEBUG_INST:
568 *val = get_reg_val(id, INS_TW);
569 break;
570 #ifdef CONFIG_KVM_XICS
571 case KVM_REG_PPC_ICP_STATE:
572 if (!vcpu->arch.icp) {
573 r = -ENXIO;
574 break;
575 }
576 *val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
577 break;
578 #endif /* CONFIG_KVM_XICS */
579 case KVM_REG_PPC_FSCR:
580 *val = get_reg_val(id, vcpu->arch.fscr);
581 break;
582 case KVM_REG_PPC_TAR:
583 *val = get_reg_val(id, vcpu->arch.tar);
584 break;
585 case KVM_REG_PPC_EBBHR:
586 *val = get_reg_val(id, vcpu->arch.ebbhr);
587 break;
588 case KVM_REG_PPC_EBBRR:
589 *val = get_reg_val(id, vcpu->arch.ebbrr);
590 break;
591 case KVM_REG_PPC_BESCR:
592 *val = get_reg_val(id, vcpu->arch.bescr);
593 break;
594 case KVM_REG_PPC_VTB:
595 *val = get_reg_val(id, vcpu->arch.vtb);
596 break;
597 case KVM_REG_PPC_IC:
598 *val = get_reg_val(id, vcpu->arch.ic);
599 break;
600 default:
601 r = -EINVAL;
602 break;
603 }
604 }
605
606 return r;
607 }
608
609 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
610 union kvmppc_one_reg *val)
611 {
612 int r = 0;
613 long int i;
614
615 r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
616 if (r == -EINVAL) {
617 r = 0;
618 switch (id) {
619 case KVM_REG_PPC_DAR:
620 kvmppc_set_dar(vcpu, set_reg_val(id, *val));
621 break;
622 case KVM_REG_PPC_DSISR:
623 kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
624 break;
625 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
626 i = id - KVM_REG_PPC_FPR0;
627 VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
628 break;
629 case KVM_REG_PPC_FPSCR:
630 vcpu->arch.fp.fpscr = set_reg_val(id, *val);
631 break;
632 #ifdef CONFIG_VSX
633 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
634 if (cpu_has_feature(CPU_FTR_VSX)) {
635 i = id - KVM_REG_PPC_VSR0;
636 vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
637 vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
638 } else {
639 r = -ENXIO;
640 }
641 break;
642 #endif /* CONFIG_VSX */
643 #ifdef CONFIG_KVM_XICS
644 case KVM_REG_PPC_ICP_STATE:
645 if (!vcpu->arch.icp) {
646 r = -ENXIO;
647 break;
648 }
649 r = kvmppc_xics_set_icp(vcpu,
650 set_reg_val(id, *val));
651 break;
652 #endif /* CONFIG_KVM_XICS */
653 case KVM_REG_PPC_FSCR:
654 vcpu->arch.fscr = set_reg_val(id, *val);
655 break;
656 case KVM_REG_PPC_TAR:
657 vcpu->arch.tar = set_reg_val(id, *val);
658 break;
659 case KVM_REG_PPC_EBBHR:
660 vcpu->arch.ebbhr = set_reg_val(id, *val);
661 break;
662 case KVM_REG_PPC_EBBRR:
663 vcpu->arch.ebbrr = set_reg_val(id, *val);
664 break;
665 case KVM_REG_PPC_BESCR:
666 vcpu->arch.bescr = set_reg_val(id, *val);
667 break;
668 case KVM_REG_PPC_VTB:
669 vcpu->arch.vtb = set_reg_val(id, *val);
670 break;
671 case KVM_REG_PPC_IC:
672 vcpu->arch.ic = set_reg_val(id, *val);
673 break;
674 default:
675 r = -EINVAL;
676 break;
677 }
678 }
679
680 return r;
681 }
682
683 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
684 {
685 vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
686 }
687
688 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
689 {
690 vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
691 }
692
693 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
694 {
695 vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
696 }
697 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
698
699 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
700 {
701 return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
702 }
703
704 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
705 struct kvm_translation *tr)
706 {
707 return 0;
708 }
709
710 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
711 struct kvm_guest_debug *dbg)
712 {
713 vcpu->guest_debug = dbg->control;
714 return 0;
715 }
716
717 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
718 {
719 kvmppc_core_queue_dec(vcpu);
720 kvm_vcpu_kick(vcpu);
721 }
722
723 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
724 {
725 return kvm->arch.kvm_ops->vcpu_create(kvm, id);
726 }
727
728 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
729 {
730 vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
731 }
732
733 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
734 {
735 return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
736 }
737
738 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
739 {
740 return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
741 }
742
743 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
744 struct kvm_memory_slot *dont)
745 {
746 kvm->arch.kvm_ops->free_memslot(free, dont);
747 }
748
749 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
750 unsigned long npages)
751 {
752 return kvm->arch.kvm_ops->create_memslot(slot, npages);
753 }
754
755 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
756 {
757 kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
758 }
759
760 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
761 struct kvm_memory_slot *memslot,
762 const struct kvm_userspace_memory_region *mem)
763 {
764 return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
765 }
766
767 void kvmppc_core_commit_memory_region(struct kvm *kvm,
768 const struct kvm_userspace_memory_region *mem,
769 const struct kvm_memory_slot *old,
770 const struct kvm_memory_slot *new)
771 {
772 kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new);
773 }
774
775 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
776 {
777 return kvm->arch.kvm_ops->unmap_hva(kvm, hva);
778 }
779 EXPORT_SYMBOL_GPL(kvm_unmap_hva);
780
781 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
782 {
783 return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
784 }
785
786 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
787 {
788 return kvm->arch.kvm_ops->age_hva(kvm, start, end);
789 }
790
791 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
792 {
793 return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
794 }
795
796 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
797 {
798 kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
799 }
800
801 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
802 {
803 vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
804 }
805
806 int kvmppc_core_init_vm(struct kvm *kvm)
807 {
808
809 #ifdef CONFIG_PPC64
810 INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables);
811 INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
812 #endif
813
814 return kvm->arch.kvm_ops->init_vm(kvm);
815 }
816
817 void kvmppc_core_destroy_vm(struct kvm *kvm)
818 {
819 kvm->arch.kvm_ops->destroy_vm(kvm);
820
821 #ifdef CONFIG_PPC64
822 kvmppc_rtas_tokens_free(kvm);
823 WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
824 #endif
825 }
826
827 int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu)
828 {
829 unsigned long size = kvmppc_get_gpr(vcpu, 4);
830 unsigned long addr = kvmppc_get_gpr(vcpu, 5);
831 u64 buf;
832 int srcu_idx;
833 int ret;
834
835 if (!is_power_of_2(size) || (size > sizeof(buf)))
836 return H_TOO_HARD;
837
838 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
839 ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf);
840 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
841 if (ret != 0)
842 return H_TOO_HARD;
843
844 switch (size) {
845 case 1:
846 kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf);
847 break;
848
849 case 2:
850 kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf));
851 break;
852
853 case 4:
854 kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf));
855 break;
856
857 case 8:
858 kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf));
859 break;
860
861 default:
862 BUG();
863 }
864
865 return H_SUCCESS;
866 }
867 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load);
868
869 int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu)
870 {
871 unsigned long size = kvmppc_get_gpr(vcpu, 4);
872 unsigned long addr = kvmppc_get_gpr(vcpu, 5);
873 unsigned long val = kvmppc_get_gpr(vcpu, 6);
874 u64 buf;
875 int srcu_idx;
876 int ret;
877
878 switch (size) {
879 case 1:
880 *(u8 *)&buf = val;
881 break;
882
883 case 2:
884 *(__be16 *)&buf = cpu_to_be16(val);
885 break;
886
887 case 4:
888 *(__be32 *)&buf = cpu_to_be32(val);
889 break;
890
891 case 8:
892 *(__be64 *)&buf = cpu_to_be64(val);
893 break;
894
895 default:
896 return H_TOO_HARD;
897 }
898
899 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
900 ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf);
901 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
902 if (ret != 0)
903 return H_TOO_HARD;
904
905 return H_SUCCESS;
906 }
907 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store);
908
909 int kvmppc_core_check_processor_compat(void)
910 {
911 /*
912 * We always return 0 for book3s. We check
913 * for compatibility while loading the HV
914 * or PR module
915 */
916 return 0;
917 }
918
919 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
920 {
921 return kvm->arch.kvm_ops->hcall_implemented(hcall);
922 }
923
924 static int kvmppc_book3s_init(void)
925 {
926 int r;
927
928 r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
929 if (r)
930 return r;
931 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
932 r = kvmppc_book3s_init_pr();
933 #endif
934 return r;
935
936 }
937
938 static void kvmppc_book3s_exit(void)
939 {
940 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
941 kvmppc_book3s_exit_pr();
942 #endif
943 kvm_exit();
944 }
945
946 module_init(kvmppc_book3s_init);
947 module_exit(kvmppc_book3s_exit);
948
949 /* On 32bit this is our one and only kernel module */
950 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
951 MODULE_ALIAS_MISCDEV(KVM_MINOR);
952 MODULE_ALIAS("devname:kvm");
953 #endif
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