xref: /openbmc/linux/arch/powerpc/kvm/book3s.c (revision 6774def6)
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_wakeup", VCPU_STAT(halt_wakeup) },
56 	{ "pf_storage",  VCPU_STAT(pf_storage) },
57 	{ "sp_storage",  VCPU_STAT(sp_storage) },
58 	{ "pf_instruc",  VCPU_STAT(pf_instruc) },
59 	{ "sp_instruc",  VCPU_STAT(sp_instruc) },
60 	{ "ld",          VCPU_STAT(ld) },
61 	{ "ld_slow",     VCPU_STAT(ld_slow) },
62 	{ "st",          VCPU_STAT(st) },
63 	{ "st_slow",     VCPU_STAT(st_slow) },
64 	{ NULL }
65 };
66 
67 void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
68 {
69 }
70 
71 void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
72 {
73 }
74 
75 void kvmppc_unfixup_split_real(struct kvm_vcpu *vcpu)
76 {
77 	if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) {
78 		ulong pc = kvmppc_get_pc(vcpu);
79 		if ((pc & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS)
80 			kvmppc_set_pc(vcpu, pc & ~SPLIT_HACK_MASK);
81 		vcpu->arch.hflags &= ~BOOK3S_HFLAG_SPLIT_HACK;
82 	}
83 }
84 EXPORT_SYMBOL_GPL(kvmppc_unfixup_split_real);
85 
86 static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
87 {
88 	if (!is_kvmppc_hv_enabled(vcpu->kvm))
89 		return to_book3s(vcpu)->hior;
90 	return 0;
91 }
92 
93 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
94 			unsigned long pending_now, unsigned long old_pending)
95 {
96 	if (is_kvmppc_hv_enabled(vcpu->kvm))
97 		return;
98 	if (pending_now)
99 		kvmppc_set_int_pending(vcpu, 1);
100 	else if (old_pending)
101 		kvmppc_set_int_pending(vcpu, 0);
102 }
103 
104 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
105 {
106 	ulong crit_raw;
107 	ulong crit_r1;
108 	bool crit;
109 
110 	if (is_kvmppc_hv_enabled(vcpu->kvm))
111 		return false;
112 
113 	crit_raw = kvmppc_get_critical(vcpu);
114 	crit_r1 = kvmppc_get_gpr(vcpu, 1);
115 
116 	/* Truncate crit indicators in 32 bit mode */
117 	if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
118 		crit_raw &= 0xffffffff;
119 		crit_r1 &= 0xffffffff;
120 	}
121 
122 	/* Critical section when crit == r1 */
123 	crit = (crit_raw == crit_r1);
124 	/* ... and we're in supervisor mode */
125 	crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
126 
127 	return crit;
128 }
129 
130 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
131 {
132 	kvmppc_unfixup_split_real(vcpu);
133 	kvmppc_set_srr0(vcpu, kvmppc_get_pc(vcpu));
134 	kvmppc_set_srr1(vcpu, kvmppc_get_msr(vcpu) | flags);
135 	kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
136 	vcpu->arch.mmu.reset_msr(vcpu);
137 }
138 
139 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
140 {
141 	unsigned int prio;
142 
143 	switch (vec) {
144 	case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET;		break;
145 	case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK;	break;
146 	case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE;		break;
147 	case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT;		break;
148 	case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE;		break;
149 	case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT;		break;
150 	case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL;		break;
151 	case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL;	break;
152 	case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT;		break;
153 	case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM;		break;
154 	case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL;		break;
155 	case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER;		break;
156 	case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL;		break;
157 	case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG;		break;
158 	case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC;		break;
159 	case 0xf40: prio = BOOK3S_IRQPRIO_VSX;			break;
160 	case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL;		break;
161 	default:    prio = BOOK3S_IRQPRIO_MAX;			break;
162 	}
163 
164 	return prio;
165 }
166 
167 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
168 					  unsigned int vec)
169 {
170 	unsigned long old_pending = vcpu->arch.pending_exceptions;
171 
172 	clear_bit(kvmppc_book3s_vec2irqprio(vec),
173 		  &vcpu->arch.pending_exceptions);
174 
175 	kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
176 				  old_pending);
177 }
178 
179 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
180 {
181 	vcpu->stat.queue_intr++;
182 
183 	set_bit(kvmppc_book3s_vec2irqprio(vec),
184 		&vcpu->arch.pending_exceptions);
185 #ifdef EXIT_DEBUG
186 	printk(KERN_INFO "Queueing interrupt %x\n", vec);
187 #endif
188 }
189 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
190 
191 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
192 {
193 	/* might as well deliver this straight away */
194 	kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
195 }
196 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
197 
198 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
199 {
200 	kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
201 }
202 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
203 
204 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
205 {
206 	return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
207 }
208 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
209 
210 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
211 {
212 	kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
213 }
214 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
215 
216 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
217                                 struct kvm_interrupt *irq)
218 {
219 	unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
220 
221 	if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
222 		vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
223 
224 	kvmppc_book3s_queue_irqprio(vcpu, vec);
225 }
226 
227 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
228 {
229 	kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
230 	kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
231 }
232 
233 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
234 				    ulong flags)
235 {
236 	kvmppc_set_dar(vcpu, dar);
237 	kvmppc_set_dsisr(vcpu, flags);
238 	kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE);
239 }
240 
241 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
242 {
243 	u64 msr = kvmppc_get_msr(vcpu);
244 	msr &= ~(SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
245 	msr |= flags & (SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
246 	kvmppc_set_msr_fast(vcpu, msr);
247 	kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
248 }
249 
250 int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
251 {
252 	int deliver = 1;
253 	int vec = 0;
254 	bool crit = kvmppc_critical_section(vcpu);
255 
256 	switch (priority) {
257 	case BOOK3S_IRQPRIO_DECREMENTER:
258 		deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
259 		vec = BOOK3S_INTERRUPT_DECREMENTER;
260 		break;
261 	case BOOK3S_IRQPRIO_EXTERNAL:
262 	case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
263 		deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
264 		vec = BOOK3S_INTERRUPT_EXTERNAL;
265 		break;
266 	case BOOK3S_IRQPRIO_SYSTEM_RESET:
267 		vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
268 		break;
269 	case BOOK3S_IRQPRIO_MACHINE_CHECK:
270 		vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
271 		break;
272 	case BOOK3S_IRQPRIO_DATA_STORAGE:
273 		vec = BOOK3S_INTERRUPT_DATA_STORAGE;
274 		break;
275 	case BOOK3S_IRQPRIO_INST_STORAGE:
276 		vec = BOOK3S_INTERRUPT_INST_STORAGE;
277 		break;
278 	case BOOK3S_IRQPRIO_DATA_SEGMENT:
279 		vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
280 		break;
281 	case BOOK3S_IRQPRIO_INST_SEGMENT:
282 		vec = BOOK3S_INTERRUPT_INST_SEGMENT;
283 		break;
284 	case BOOK3S_IRQPRIO_ALIGNMENT:
285 		vec = BOOK3S_INTERRUPT_ALIGNMENT;
286 		break;
287 	case BOOK3S_IRQPRIO_PROGRAM:
288 		vec = BOOK3S_INTERRUPT_PROGRAM;
289 		break;
290 	case BOOK3S_IRQPRIO_VSX:
291 		vec = BOOK3S_INTERRUPT_VSX;
292 		break;
293 	case BOOK3S_IRQPRIO_ALTIVEC:
294 		vec = BOOK3S_INTERRUPT_ALTIVEC;
295 		break;
296 	case BOOK3S_IRQPRIO_FP_UNAVAIL:
297 		vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
298 		break;
299 	case BOOK3S_IRQPRIO_SYSCALL:
300 		vec = BOOK3S_INTERRUPT_SYSCALL;
301 		break;
302 	case BOOK3S_IRQPRIO_DEBUG:
303 		vec = BOOK3S_INTERRUPT_TRACE;
304 		break;
305 	case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
306 		vec = BOOK3S_INTERRUPT_PERFMON;
307 		break;
308 	case BOOK3S_IRQPRIO_FAC_UNAVAIL:
309 		vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
310 		break;
311 	default:
312 		deliver = 0;
313 		printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
314 		break;
315 	}
316 
317 #if 0
318 	printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
319 #endif
320 
321 	if (deliver)
322 		kvmppc_inject_interrupt(vcpu, vec, 0);
323 
324 	return deliver;
325 }
326 
327 /*
328  * This function determines if an irqprio should be cleared once issued.
329  */
330 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
331 {
332 	switch (priority) {
333 		case BOOK3S_IRQPRIO_DECREMENTER:
334 			/* DEC interrupts get cleared by mtdec */
335 			return false;
336 		case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
337 			/* External interrupts get cleared by userspace */
338 			return false;
339 	}
340 
341 	return true;
342 }
343 
344 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
345 {
346 	unsigned long *pending = &vcpu->arch.pending_exceptions;
347 	unsigned long old_pending = vcpu->arch.pending_exceptions;
348 	unsigned int priority;
349 
350 #ifdef EXIT_DEBUG
351 	if (vcpu->arch.pending_exceptions)
352 		printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
353 #endif
354 	priority = __ffs(*pending);
355 	while (priority < BOOK3S_IRQPRIO_MAX) {
356 		if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
357 		    clear_irqprio(vcpu, priority)) {
358 			clear_bit(priority, &vcpu->arch.pending_exceptions);
359 			break;
360 		}
361 
362 		priority = find_next_bit(pending,
363 					 BITS_PER_BYTE * sizeof(*pending),
364 					 priority + 1);
365 	}
366 
367 	/* Tell the guest about our interrupt status */
368 	kvmppc_update_int_pending(vcpu, *pending, old_pending);
369 
370 	return 0;
371 }
372 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
373 
374 pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
375 			bool *writable)
376 {
377 	ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
378 	gfn_t gfn = gpa >> PAGE_SHIFT;
379 
380 	if (!(kvmppc_get_msr(vcpu) & MSR_SF))
381 		mp_pa = (uint32_t)mp_pa;
382 
383 	/* Magic page override */
384 	gpa &= ~0xFFFULL;
385 	if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
386 		ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
387 		pfn_t pfn;
388 
389 		pfn = (pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
390 		get_page(pfn_to_page(pfn));
391 		if (writable)
392 			*writable = true;
393 		return pfn;
394 	}
395 
396 	return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
397 }
398 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
399 
400 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
401 		 enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
402 {
403 	bool data = (xlid == XLATE_DATA);
404 	bool iswrite = (xlrw == XLATE_WRITE);
405 	int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
406 	int r;
407 
408 	if (relocated) {
409 		r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
410 	} else {
411 		pte->eaddr = eaddr;
412 		pte->raddr = eaddr & KVM_PAM;
413 		pte->vpage = VSID_REAL | eaddr >> 12;
414 		pte->may_read = true;
415 		pte->may_write = true;
416 		pte->may_execute = true;
417 		r = 0;
418 
419 		if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
420 		    !data) {
421 			if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
422 			    ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
423 			pte->raddr &= ~SPLIT_HACK_MASK;
424 		}
425 	}
426 
427 	return r;
428 }
429 
430 int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, enum instruction_type type,
431 					 u32 *inst)
432 {
433 	ulong pc = kvmppc_get_pc(vcpu);
434 	int r;
435 
436 	if (type == INST_SC)
437 		pc -= 4;
438 
439 	r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
440 	if (r == EMULATE_DONE)
441 		return r;
442 	else
443 		return EMULATE_AGAIN;
444 }
445 EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);
446 
447 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
448 {
449 	return 0;
450 }
451 
452 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
453 {
454 	return 0;
455 }
456 
457 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
458 {
459 }
460 
461 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
462 				  struct kvm_sregs *sregs)
463 {
464 	return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
465 }
466 
467 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
468 				  struct kvm_sregs *sregs)
469 {
470 	return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
471 }
472 
473 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
474 {
475 	int i;
476 
477 	regs->pc = kvmppc_get_pc(vcpu);
478 	regs->cr = kvmppc_get_cr(vcpu);
479 	regs->ctr = kvmppc_get_ctr(vcpu);
480 	regs->lr = kvmppc_get_lr(vcpu);
481 	regs->xer = kvmppc_get_xer(vcpu);
482 	regs->msr = kvmppc_get_msr(vcpu);
483 	regs->srr0 = kvmppc_get_srr0(vcpu);
484 	regs->srr1 = kvmppc_get_srr1(vcpu);
485 	regs->pid = vcpu->arch.pid;
486 	regs->sprg0 = kvmppc_get_sprg0(vcpu);
487 	regs->sprg1 = kvmppc_get_sprg1(vcpu);
488 	regs->sprg2 = kvmppc_get_sprg2(vcpu);
489 	regs->sprg3 = kvmppc_get_sprg3(vcpu);
490 	regs->sprg4 = kvmppc_get_sprg4(vcpu);
491 	regs->sprg5 = kvmppc_get_sprg5(vcpu);
492 	regs->sprg6 = kvmppc_get_sprg6(vcpu);
493 	regs->sprg7 = kvmppc_get_sprg7(vcpu);
494 
495 	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
496 		regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
497 
498 	return 0;
499 }
500 
501 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
502 {
503 	int i;
504 
505 	kvmppc_set_pc(vcpu, regs->pc);
506 	kvmppc_set_cr(vcpu, regs->cr);
507 	kvmppc_set_ctr(vcpu, regs->ctr);
508 	kvmppc_set_lr(vcpu, regs->lr);
509 	kvmppc_set_xer(vcpu, regs->xer);
510 	kvmppc_set_msr(vcpu, regs->msr);
511 	kvmppc_set_srr0(vcpu, regs->srr0);
512 	kvmppc_set_srr1(vcpu, regs->srr1);
513 	kvmppc_set_sprg0(vcpu, regs->sprg0);
514 	kvmppc_set_sprg1(vcpu, regs->sprg1);
515 	kvmppc_set_sprg2(vcpu, regs->sprg2);
516 	kvmppc_set_sprg3(vcpu, regs->sprg3);
517 	kvmppc_set_sprg4(vcpu, regs->sprg4);
518 	kvmppc_set_sprg5(vcpu, regs->sprg5);
519 	kvmppc_set_sprg6(vcpu, regs->sprg6);
520 	kvmppc_set_sprg7(vcpu, regs->sprg7);
521 
522 	for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
523 		kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
524 
525 	return 0;
526 }
527 
528 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
529 {
530 	return -ENOTSUPP;
531 }
532 
533 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
534 {
535 	return -ENOTSUPP;
536 }
537 
538 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
539 			union kvmppc_one_reg *val)
540 {
541 	int r = 0;
542 	long int i;
543 
544 	r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
545 	if (r == -EINVAL) {
546 		r = 0;
547 		switch (id) {
548 		case KVM_REG_PPC_DAR:
549 			*val = get_reg_val(id, kvmppc_get_dar(vcpu));
550 			break;
551 		case KVM_REG_PPC_DSISR:
552 			*val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
553 			break;
554 		case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
555 			i = id - KVM_REG_PPC_FPR0;
556 			*val = get_reg_val(id, VCPU_FPR(vcpu, i));
557 			break;
558 		case KVM_REG_PPC_FPSCR:
559 			*val = get_reg_val(id, vcpu->arch.fp.fpscr);
560 			break;
561 #ifdef CONFIG_VSX
562 		case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
563 			if (cpu_has_feature(CPU_FTR_VSX)) {
564 				i = id - KVM_REG_PPC_VSR0;
565 				val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
566 				val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
567 			} else {
568 				r = -ENXIO;
569 			}
570 			break;
571 #endif /* CONFIG_VSX */
572 		case KVM_REG_PPC_DEBUG_INST:
573 			*val = get_reg_val(id, INS_TW);
574 			break;
575 #ifdef CONFIG_KVM_XICS
576 		case KVM_REG_PPC_ICP_STATE:
577 			if (!vcpu->arch.icp) {
578 				r = -ENXIO;
579 				break;
580 			}
581 			*val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
582 			break;
583 #endif /* CONFIG_KVM_XICS */
584 		case KVM_REG_PPC_FSCR:
585 			*val = get_reg_val(id, vcpu->arch.fscr);
586 			break;
587 		case KVM_REG_PPC_TAR:
588 			*val = get_reg_val(id, vcpu->arch.tar);
589 			break;
590 		case KVM_REG_PPC_EBBHR:
591 			*val = get_reg_val(id, vcpu->arch.ebbhr);
592 			break;
593 		case KVM_REG_PPC_EBBRR:
594 			*val = get_reg_val(id, vcpu->arch.ebbrr);
595 			break;
596 		case KVM_REG_PPC_BESCR:
597 			*val = get_reg_val(id, vcpu->arch.bescr);
598 			break;
599 		case KVM_REG_PPC_VTB:
600 			*val = get_reg_val(id, vcpu->arch.vtb);
601 			break;
602 		case KVM_REG_PPC_IC:
603 			*val = get_reg_val(id, vcpu->arch.ic);
604 			break;
605 		default:
606 			r = -EINVAL;
607 			break;
608 		}
609 	}
610 
611 	return r;
612 }
613 
614 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
615 			union kvmppc_one_reg *val)
616 {
617 	int r = 0;
618 	long int i;
619 
620 	r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
621 	if (r == -EINVAL) {
622 		r = 0;
623 		switch (id) {
624 		case KVM_REG_PPC_DAR:
625 			kvmppc_set_dar(vcpu, set_reg_val(id, *val));
626 			break;
627 		case KVM_REG_PPC_DSISR:
628 			kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
629 			break;
630 		case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
631 			i = id - KVM_REG_PPC_FPR0;
632 			VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
633 			break;
634 		case KVM_REG_PPC_FPSCR:
635 			vcpu->arch.fp.fpscr = set_reg_val(id, *val);
636 			break;
637 #ifdef CONFIG_VSX
638 		case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
639 			if (cpu_has_feature(CPU_FTR_VSX)) {
640 				i = id - KVM_REG_PPC_VSR0;
641 				vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
642 				vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
643 			} else {
644 				r = -ENXIO;
645 			}
646 			break;
647 #endif /* CONFIG_VSX */
648 #ifdef CONFIG_KVM_XICS
649 		case KVM_REG_PPC_ICP_STATE:
650 			if (!vcpu->arch.icp) {
651 				r = -ENXIO;
652 				break;
653 			}
654 			r = kvmppc_xics_set_icp(vcpu,
655 						set_reg_val(id, *val));
656 			break;
657 #endif /* CONFIG_KVM_XICS */
658 		case KVM_REG_PPC_FSCR:
659 			vcpu->arch.fscr = set_reg_val(id, *val);
660 			break;
661 		case KVM_REG_PPC_TAR:
662 			vcpu->arch.tar = set_reg_val(id, *val);
663 			break;
664 		case KVM_REG_PPC_EBBHR:
665 			vcpu->arch.ebbhr = set_reg_val(id, *val);
666 			break;
667 		case KVM_REG_PPC_EBBRR:
668 			vcpu->arch.ebbrr = set_reg_val(id, *val);
669 			break;
670 		case KVM_REG_PPC_BESCR:
671 			vcpu->arch.bescr = set_reg_val(id, *val);
672 			break;
673 		case KVM_REG_PPC_VTB:
674 			vcpu->arch.vtb = set_reg_val(id, *val);
675 			break;
676 		case KVM_REG_PPC_IC:
677 			vcpu->arch.ic = set_reg_val(id, *val);
678 			break;
679 		default:
680 			r = -EINVAL;
681 			break;
682 		}
683 	}
684 
685 	return r;
686 }
687 
688 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
689 {
690 	vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
691 }
692 
693 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
694 {
695 	vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
696 }
697 
698 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
699 {
700 	vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
701 }
702 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
703 
704 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
705 {
706 	return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
707 }
708 
709 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
710                                   struct kvm_translation *tr)
711 {
712 	return 0;
713 }
714 
715 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
716 					struct kvm_guest_debug *dbg)
717 {
718 	vcpu->guest_debug = dbg->control;
719 	return 0;
720 }
721 
722 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
723 {
724 	kvmppc_core_queue_dec(vcpu);
725 	kvm_vcpu_kick(vcpu);
726 }
727 
728 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
729 {
730 	return kvm->arch.kvm_ops->vcpu_create(kvm, id);
731 }
732 
733 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
734 {
735 	vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
736 }
737 
738 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
739 {
740 	return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
741 }
742 
743 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
744 {
745 	return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
746 }
747 
748 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
749 			      struct kvm_memory_slot *dont)
750 {
751 	kvm->arch.kvm_ops->free_memslot(free, dont);
752 }
753 
754 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
755 			       unsigned long npages)
756 {
757 	return kvm->arch.kvm_ops->create_memslot(slot, npages);
758 }
759 
760 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
761 {
762 	kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
763 }
764 
765 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
766 				struct kvm_memory_slot *memslot,
767 				struct kvm_userspace_memory_region *mem)
768 {
769 	return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
770 }
771 
772 void kvmppc_core_commit_memory_region(struct kvm *kvm,
773 				struct kvm_userspace_memory_region *mem,
774 				const struct kvm_memory_slot *old)
775 {
776 	kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old);
777 }
778 
779 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
780 {
781 	return kvm->arch.kvm_ops->unmap_hva(kvm, hva);
782 }
783 EXPORT_SYMBOL_GPL(kvm_unmap_hva);
784 
785 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
786 {
787 	return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
788 }
789 
790 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
791 {
792 	return kvm->arch.kvm_ops->age_hva(kvm, start, end);
793 }
794 
795 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
796 {
797 	return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
798 }
799 
800 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
801 {
802 	kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
803 }
804 
805 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
806 {
807 	vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
808 }
809 
810 int kvmppc_core_init_vm(struct kvm *kvm)
811 {
812 
813 #ifdef CONFIG_PPC64
814 	INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables);
815 	INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
816 #endif
817 
818 	return kvm->arch.kvm_ops->init_vm(kvm);
819 }
820 
821 void kvmppc_core_destroy_vm(struct kvm *kvm)
822 {
823 	kvm->arch.kvm_ops->destroy_vm(kvm);
824 
825 #ifdef CONFIG_PPC64
826 	kvmppc_rtas_tokens_free(kvm);
827 	WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
828 #endif
829 }
830 
831 int kvmppc_core_check_processor_compat(void)
832 {
833 	/*
834 	 * We always return 0 for book3s. We check
835 	 * for compatability while loading the HV
836 	 * or PR module
837 	 */
838 	return 0;
839 }
840 
841 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
842 {
843 	return kvm->arch.kvm_ops->hcall_implemented(hcall);
844 }
845 
846 static int kvmppc_book3s_init(void)
847 {
848 	int r;
849 
850 	r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
851 	if (r)
852 		return r;
853 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
854 	r = kvmppc_book3s_init_pr();
855 #endif
856 	return r;
857 
858 }
859 
860 static void kvmppc_book3s_exit(void)
861 {
862 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
863 	kvmppc_book3s_exit_pr();
864 #endif
865 	kvm_exit();
866 }
867 
868 module_init(kvmppc_book3s_init);
869 module_exit(kvmppc_book3s_exit);
870 
871 /* On 32bit this is our one and only kernel module */
872 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
873 MODULE_ALIAS_MISCDEV(KVM_MINOR);
874 MODULE_ALIAS("devname:kvm");
875 #endif
876