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KVM: PPC: Provide functions for queueing up FP/VEC/VSX unavailable interrupts
[mirror_ubuntu-bionic-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 <linux/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_poll_success_ns", VCPU_STAT(halt_poll_success_ns) },
56 { "halt_poll_fail_ns", VCPU_STAT(halt_poll_fail_ns) },
57 { "halt_wait_ns", VCPU_STAT(halt_wait_ns) },
58 { "halt_successful_poll", VCPU_STAT(halt_successful_poll), },
59 { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll), },
60 { "halt_successful_wait", VCPU_STAT(halt_successful_wait) },
61 { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
62 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
63 { "pf_storage", VCPU_STAT(pf_storage) },
64 { "sp_storage", VCPU_STAT(sp_storage) },
65 { "pf_instruc", VCPU_STAT(pf_instruc) },
66 { "sp_instruc", VCPU_STAT(sp_instruc) },
67 { "ld", VCPU_STAT(ld) },
68 { "ld_slow", VCPU_STAT(ld_slow) },
69 { "st", VCPU_STAT(st) },
70 { "st_slow", VCPU_STAT(st_slow) },
71 { "pthru_all", VCPU_STAT(pthru_all) },
72 { "pthru_host", VCPU_STAT(pthru_host) },
73 { "pthru_bad_aff", VCPU_STAT(pthru_bad_aff) },
74 { NULL }
75 };
76
77 void kvmppc_unfixup_split_real(struct kvm_vcpu *vcpu)
78 {
79 if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) {
80 ulong pc = kvmppc_get_pc(vcpu);
81 if ((pc & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS)
82 kvmppc_set_pc(vcpu, pc & ~SPLIT_HACK_MASK);
83 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SPLIT_HACK;
84 }
85 }
86 EXPORT_SYMBOL_GPL(kvmppc_unfixup_split_real);
87
88 static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
89 {
90 if (!is_kvmppc_hv_enabled(vcpu->kvm))
91 return to_book3s(vcpu)->hior;
92 return 0;
93 }
94
95 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
96 unsigned long pending_now, unsigned long old_pending)
97 {
98 if (is_kvmppc_hv_enabled(vcpu->kvm))
99 return;
100 if (pending_now)
101 kvmppc_set_int_pending(vcpu, 1);
102 else if (old_pending)
103 kvmppc_set_int_pending(vcpu, 0);
104 }
105
106 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
107 {
108 ulong crit_raw;
109 ulong crit_r1;
110 bool crit;
111
112 if (is_kvmppc_hv_enabled(vcpu->kvm))
113 return false;
114
115 crit_raw = kvmppc_get_critical(vcpu);
116 crit_r1 = kvmppc_get_gpr(vcpu, 1);
117
118 /* Truncate crit indicators in 32 bit mode */
119 if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
120 crit_raw &= 0xffffffff;
121 crit_r1 &= 0xffffffff;
122 }
123
124 /* Critical section when crit == r1 */
125 crit = (crit_raw == crit_r1);
126 /* ... and we're in supervisor mode */
127 crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
128
129 return crit;
130 }
131
132 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
133 {
134 kvmppc_unfixup_split_real(vcpu);
135 kvmppc_set_srr0(vcpu, kvmppc_get_pc(vcpu));
136 kvmppc_set_srr1(vcpu, kvmppc_get_msr(vcpu) | flags);
137 kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
138 vcpu->arch.mmu.reset_msr(vcpu);
139 }
140
141 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
142 {
143 unsigned int prio;
144
145 switch (vec) {
146 case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break;
147 case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break;
148 case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break;
149 case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break;
150 case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break;
151 case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break;
152 case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break;
153 case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL; break;
154 case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break;
155 case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break;
156 case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break;
157 case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break;
158 case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break;
159 case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break;
160 case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break;
161 case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break;
162 case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL; break;
163 default: prio = BOOK3S_IRQPRIO_MAX; break;
164 }
165
166 return prio;
167 }
168
169 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
170 unsigned int vec)
171 {
172 unsigned long old_pending = vcpu->arch.pending_exceptions;
173
174 clear_bit(kvmppc_book3s_vec2irqprio(vec),
175 &vcpu->arch.pending_exceptions);
176
177 kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
178 old_pending);
179 }
180
181 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
182 {
183 vcpu->stat.queue_intr++;
184
185 set_bit(kvmppc_book3s_vec2irqprio(vec),
186 &vcpu->arch.pending_exceptions);
187 #ifdef EXIT_DEBUG
188 printk(KERN_INFO "Queueing interrupt %x\n", vec);
189 #endif
190 }
191 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
192
193 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
194 {
195 /* might as well deliver this straight away */
196 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
197 }
198 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
199
200 void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu)
201 {
202 /* might as well deliver this straight away */
203 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, 0);
204 }
205
206 void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu)
207 {
208 /* might as well deliver this straight away */
209 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_ALTIVEC, 0);
210 }
211
212 void kvmppc_core_queue_vsx_unavail(struct kvm_vcpu *vcpu)
213 {
214 /* might as well deliver this straight away */
215 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_VSX, 0);
216 }
217
218 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
219 {
220 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
221 }
222 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
223
224 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
225 {
226 return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
227 }
228 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
229
230 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
231 {
232 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
233 }
234 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
235
236 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
237 struct kvm_interrupt *irq)
238 {
239 unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
240
241 if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
242 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
243
244 kvmppc_book3s_queue_irqprio(vcpu, vec);
245 }
246
247 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
248 {
249 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
250 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
251 }
252
253 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
254 ulong flags)
255 {
256 kvmppc_set_dar(vcpu, dar);
257 kvmppc_set_dsisr(vcpu, flags);
258 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE);
259 }
260 EXPORT_SYMBOL_GPL(kvmppc_core_queue_data_storage); /* used by kvm_hv */
261
262 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
263 {
264 u64 msr = kvmppc_get_msr(vcpu);
265 msr &= ~(SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
266 msr |= flags & (SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
267 kvmppc_set_msr_fast(vcpu, msr);
268 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
269 }
270
271 static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu,
272 unsigned int priority)
273 {
274 int deliver = 1;
275 int vec = 0;
276 bool crit = kvmppc_critical_section(vcpu);
277
278 switch (priority) {
279 case BOOK3S_IRQPRIO_DECREMENTER:
280 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
281 vec = BOOK3S_INTERRUPT_DECREMENTER;
282 break;
283 case BOOK3S_IRQPRIO_EXTERNAL:
284 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
285 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
286 vec = BOOK3S_INTERRUPT_EXTERNAL;
287 break;
288 case BOOK3S_IRQPRIO_SYSTEM_RESET:
289 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
290 break;
291 case BOOK3S_IRQPRIO_MACHINE_CHECK:
292 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
293 break;
294 case BOOK3S_IRQPRIO_DATA_STORAGE:
295 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
296 break;
297 case BOOK3S_IRQPRIO_INST_STORAGE:
298 vec = BOOK3S_INTERRUPT_INST_STORAGE;
299 break;
300 case BOOK3S_IRQPRIO_DATA_SEGMENT:
301 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
302 break;
303 case BOOK3S_IRQPRIO_INST_SEGMENT:
304 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
305 break;
306 case BOOK3S_IRQPRIO_ALIGNMENT:
307 vec = BOOK3S_INTERRUPT_ALIGNMENT;
308 break;
309 case BOOK3S_IRQPRIO_PROGRAM:
310 vec = BOOK3S_INTERRUPT_PROGRAM;
311 break;
312 case BOOK3S_IRQPRIO_VSX:
313 vec = BOOK3S_INTERRUPT_VSX;
314 break;
315 case BOOK3S_IRQPRIO_ALTIVEC:
316 vec = BOOK3S_INTERRUPT_ALTIVEC;
317 break;
318 case BOOK3S_IRQPRIO_FP_UNAVAIL:
319 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
320 break;
321 case BOOK3S_IRQPRIO_SYSCALL:
322 vec = BOOK3S_INTERRUPT_SYSCALL;
323 break;
324 case BOOK3S_IRQPRIO_DEBUG:
325 vec = BOOK3S_INTERRUPT_TRACE;
326 break;
327 case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
328 vec = BOOK3S_INTERRUPT_PERFMON;
329 break;
330 case BOOK3S_IRQPRIO_FAC_UNAVAIL:
331 vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
332 break;
333 default:
334 deliver = 0;
335 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
336 break;
337 }
338
339 #if 0
340 printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
341 #endif
342
343 if (deliver)
344 kvmppc_inject_interrupt(vcpu, vec, 0);
345
346 return deliver;
347 }
348
349 /*
350 * This function determines if an irqprio should be cleared once issued.
351 */
352 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
353 {
354 switch (priority) {
355 case BOOK3S_IRQPRIO_DECREMENTER:
356 /* DEC interrupts get cleared by mtdec */
357 return false;
358 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
359 /* External interrupts get cleared by userspace */
360 return false;
361 }
362
363 return true;
364 }
365
366 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
367 {
368 unsigned long *pending = &vcpu->arch.pending_exceptions;
369 unsigned long old_pending = vcpu->arch.pending_exceptions;
370 unsigned int priority;
371
372 #ifdef EXIT_DEBUG
373 if (vcpu->arch.pending_exceptions)
374 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
375 #endif
376 priority = __ffs(*pending);
377 while (priority < BOOK3S_IRQPRIO_MAX) {
378 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
379 clear_irqprio(vcpu, priority)) {
380 clear_bit(priority, &vcpu->arch.pending_exceptions);
381 break;
382 }
383
384 priority = find_next_bit(pending,
385 BITS_PER_BYTE * sizeof(*pending),
386 priority + 1);
387 }
388
389 /* Tell the guest about our interrupt status */
390 kvmppc_update_int_pending(vcpu, *pending, old_pending);
391
392 return 0;
393 }
394 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
395
396 kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
397 bool *writable)
398 {
399 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
400 gfn_t gfn = gpa >> PAGE_SHIFT;
401
402 if (!(kvmppc_get_msr(vcpu) & MSR_SF))
403 mp_pa = (uint32_t)mp_pa;
404
405 /* Magic page override */
406 gpa &= ~0xFFFULL;
407 if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
408 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
409 kvm_pfn_t pfn;
410
411 pfn = (kvm_pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
412 get_page(pfn_to_page(pfn));
413 if (writable)
414 *writable = true;
415 return pfn;
416 }
417
418 return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
419 }
420 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
421
422 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
423 enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
424 {
425 bool data = (xlid == XLATE_DATA);
426 bool iswrite = (xlrw == XLATE_WRITE);
427 int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
428 int r;
429
430 if (relocated) {
431 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
432 } else {
433 pte->eaddr = eaddr;
434 pte->raddr = eaddr & KVM_PAM;
435 pte->vpage = VSID_REAL | eaddr >> 12;
436 pte->may_read = true;
437 pte->may_write = true;
438 pte->may_execute = true;
439 r = 0;
440
441 if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
442 !data) {
443 if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
444 ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
445 pte->raddr &= ~SPLIT_HACK_MASK;
446 }
447 }
448
449 return r;
450 }
451
452 int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, enum instruction_type type,
453 u32 *inst)
454 {
455 ulong pc = kvmppc_get_pc(vcpu);
456 int r;
457
458 if (type == INST_SC)
459 pc -= 4;
460
461 r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
462 if (r == EMULATE_DONE)
463 return r;
464 else
465 return EMULATE_AGAIN;
466 }
467 EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);
468
469 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
470 {
471 return 0;
472 }
473
474 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
475 {
476 return 0;
477 }
478
479 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
480 {
481 }
482
483 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
484 struct kvm_sregs *sregs)
485 {
486 return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
487 }
488
489 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
490 struct kvm_sregs *sregs)
491 {
492 return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
493 }
494
495 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
496 {
497 int i;
498
499 regs->pc = kvmppc_get_pc(vcpu);
500 regs->cr = kvmppc_get_cr(vcpu);
501 regs->ctr = kvmppc_get_ctr(vcpu);
502 regs->lr = kvmppc_get_lr(vcpu);
503 regs->xer = kvmppc_get_xer(vcpu);
504 regs->msr = kvmppc_get_msr(vcpu);
505 regs->srr0 = kvmppc_get_srr0(vcpu);
506 regs->srr1 = kvmppc_get_srr1(vcpu);
507 regs->pid = vcpu->arch.pid;
508 regs->sprg0 = kvmppc_get_sprg0(vcpu);
509 regs->sprg1 = kvmppc_get_sprg1(vcpu);
510 regs->sprg2 = kvmppc_get_sprg2(vcpu);
511 regs->sprg3 = kvmppc_get_sprg3(vcpu);
512 regs->sprg4 = kvmppc_get_sprg4(vcpu);
513 regs->sprg5 = kvmppc_get_sprg5(vcpu);
514 regs->sprg6 = kvmppc_get_sprg6(vcpu);
515 regs->sprg7 = kvmppc_get_sprg7(vcpu);
516
517 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
518 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
519
520 return 0;
521 }
522
523 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
524 {
525 int i;
526
527 kvmppc_set_pc(vcpu, regs->pc);
528 kvmppc_set_cr(vcpu, regs->cr);
529 kvmppc_set_ctr(vcpu, regs->ctr);
530 kvmppc_set_lr(vcpu, regs->lr);
531 kvmppc_set_xer(vcpu, regs->xer);
532 kvmppc_set_msr(vcpu, regs->msr);
533 kvmppc_set_srr0(vcpu, regs->srr0);
534 kvmppc_set_srr1(vcpu, regs->srr1);
535 kvmppc_set_sprg0(vcpu, regs->sprg0);
536 kvmppc_set_sprg1(vcpu, regs->sprg1);
537 kvmppc_set_sprg2(vcpu, regs->sprg2);
538 kvmppc_set_sprg3(vcpu, regs->sprg3);
539 kvmppc_set_sprg4(vcpu, regs->sprg4);
540 kvmppc_set_sprg5(vcpu, regs->sprg5);
541 kvmppc_set_sprg6(vcpu, regs->sprg6);
542 kvmppc_set_sprg7(vcpu, regs->sprg7);
543
544 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
545 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
546
547 return 0;
548 }
549
550 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
551 {
552 return -ENOTSUPP;
553 }
554
555 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
556 {
557 return -ENOTSUPP;
558 }
559
560 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
561 union kvmppc_one_reg *val)
562 {
563 int r = 0;
564 long int i;
565
566 r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
567 if (r == -EINVAL) {
568 r = 0;
569 switch (id) {
570 case KVM_REG_PPC_DAR:
571 *val = get_reg_val(id, kvmppc_get_dar(vcpu));
572 break;
573 case KVM_REG_PPC_DSISR:
574 *val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
575 break;
576 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
577 i = id - KVM_REG_PPC_FPR0;
578 *val = get_reg_val(id, VCPU_FPR(vcpu, i));
579 break;
580 case KVM_REG_PPC_FPSCR:
581 *val = get_reg_val(id, vcpu->arch.fp.fpscr);
582 break;
583 #ifdef CONFIG_VSX
584 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
585 if (cpu_has_feature(CPU_FTR_VSX)) {
586 i = id - KVM_REG_PPC_VSR0;
587 val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
588 val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
589 } else {
590 r = -ENXIO;
591 }
592 break;
593 #endif /* CONFIG_VSX */
594 case KVM_REG_PPC_DEBUG_INST:
595 *val = get_reg_val(id, INS_TW);
596 break;
597 #ifdef CONFIG_KVM_XICS
598 case KVM_REG_PPC_ICP_STATE:
599 if (!vcpu->arch.icp) {
600 r = -ENXIO;
601 break;
602 }
603 *val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
604 break;
605 #endif /* CONFIG_KVM_XICS */
606 case KVM_REG_PPC_FSCR:
607 *val = get_reg_val(id, vcpu->arch.fscr);
608 break;
609 case KVM_REG_PPC_TAR:
610 *val = get_reg_val(id, vcpu->arch.tar);
611 break;
612 case KVM_REG_PPC_EBBHR:
613 *val = get_reg_val(id, vcpu->arch.ebbhr);
614 break;
615 case KVM_REG_PPC_EBBRR:
616 *val = get_reg_val(id, vcpu->arch.ebbrr);
617 break;
618 case KVM_REG_PPC_BESCR:
619 *val = get_reg_val(id, vcpu->arch.bescr);
620 break;
621 case KVM_REG_PPC_IC:
622 *val = get_reg_val(id, vcpu->arch.ic);
623 break;
624 default:
625 r = -EINVAL;
626 break;
627 }
628 }
629
630 return r;
631 }
632
633 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
634 union kvmppc_one_reg *val)
635 {
636 int r = 0;
637 long int i;
638
639 r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
640 if (r == -EINVAL) {
641 r = 0;
642 switch (id) {
643 case KVM_REG_PPC_DAR:
644 kvmppc_set_dar(vcpu, set_reg_val(id, *val));
645 break;
646 case KVM_REG_PPC_DSISR:
647 kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
648 break;
649 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
650 i = id - KVM_REG_PPC_FPR0;
651 VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
652 break;
653 case KVM_REG_PPC_FPSCR:
654 vcpu->arch.fp.fpscr = set_reg_val(id, *val);
655 break;
656 #ifdef CONFIG_VSX
657 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
658 if (cpu_has_feature(CPU_FTR_VSX)) {
659 i = id - KVM_REG_PPC_VSR0;
660 vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
661 vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
662 } else {
663 r = -ENXIO;
664 }
665 break;
666 #endif /* CONFIG_VSX */
667 #ifdef CONFIG_KVM_XICS
668 case KVM_REG_PPC_ICP_STATE:
669 if (!vcpu->arch.icp) {
670 r = -ENXIO;
671 break;
672 }
673 r = kvmppc_xics_set_icp(vcpu,
674 set_reg_val(id, *val));
675 break;
676 #endif /* CONFIG_KVM_XICS */
677 case KVM_REG_PPC_FSCR:
678 vcpu->arch.fscr = set_reg_val(id, *val);
679 break;
680 case KVM_REG_PPC_TAR:
681 vcpu->arch.tar = set_reg_val(id, *val);
682 break;
683 case KVM_REG_PPC_EBBHR:
684 vcpu->arch.ebbhr = set_reg_val(id, *val);
685 break;
686 case KVM_REG_PPC_EBBRR:
687 vcpu->arch.ebbrr = set_reg_val(id, *val);
688 break;
689 case KVM_REG_PPC_BESCR:
690 vcpu->arch.bescr = set_reg_val(id, *val);
691 break;
692 case KVM_REG_PPC_IC:
693 vcpu->arch.ic = set_reg_val(id, *val);
694 break;
695 default:
696 r = -EINVAL;
697 break;
698 }
699 }
700
701 return r;
702 }
703
704 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
705 {
706 vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
707 }
708
709 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
710 {
711 vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
712 }
713
714 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
715 {
716 vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
717 }
718 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
719
720 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
721 {
722 return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
723 }
724
725 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
726 struct kvm_translation *tr)
727 {
728 return 0;
729 }
730
731 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
732 struct kvm_guest_debug *dbg)
733 {
734 vcpu->guest_debug = dbg->control;
735 return 0;
736 }
737
738 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
739 {
740 kvmppc_core_queue_dec(vcpu);
741 kvm_vcpu_kick(vcpu);
742 }
743
744 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
745 {
746 return kvm->arch.kvm_ops->vcpu_create(kvm, id);
747 }
748
749 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
750 {
751 vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
752 }
753
754 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
755 {
756 return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
757 }
758
759 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
760 {
761 return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
762 }
763
764 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
765 struct kvm_memory_slot *dont)
766 {
767 kvm->arch.kvm_ops->free_memslot(free, dont);
768 }
769
770 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
771 unsigned long npages)
772 {
773 return kvm->arch.kvm_ops->create_memslot(slot, npages);
774 }
775
776 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
777 {
778 kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
779 }
780
781 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
782 struct kvm_memory_slot *memslot,
783 const struct kvm_userspace_memory_region *mem)
784 {
785 return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
786 }
787
788 void kvmppc_core_commit_memory_region(struct kvm *kvm,
789 const struct kvm_userspace_memory_region *mem,
790 const struct kvm_memory_slot *old,
791 const struct kvm_memory_slot *new)
792 {
793 kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new);
794 }
795
796 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
797 {
798 return kvm->arch.kvm_ops->unmap_hva(kvm, hva);
799 }
800 EXPORT_SYMBOL_GPL(kvm_unmap_hva);
801
802 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
803 {
804 return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
805 }
806
807 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
808 {
809 return kvm->arch.kvm_ops->age_hva(kvm, start, end);
810 }
811
812 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
813 {
814 return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
815 }
816
817 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
818 {
819 kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
820 }
821
822 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
823 {
824 vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
825 }
826
827 int kvmppc_core_init_vm(struct kvm *kvm)
828 {
829
830 #ifdef CONFIG_PPC64
831 INIT_LIST_HEAD_RCU(&kvm->arch.spapr_tce_tables);
832 INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
833 #endif
834
835 return kvm->arch.kvm_ops->init_vm(kvm);
836 }
837
838 void kvmppc_core_destroy_vm(struct kvm *kvm)
839 {
840 kvm->arch.kvm_ops->destroy_vm(kvm);
841
842 #ifdef CONFIG_PPC64
843 kvmppc_rtas_tokens_free(kvm);
844 WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
845 #endif
846 }
847
848 int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu)
849 {
850 unsigned long size = kvmppc_get_gpr(vcpu, 4);
851 unsigned long addr = kvmppc_get_gpr(vcpu, 5);
852 u64 buf;
853 int srcu_idx;
854 int ret;
855
856 if (!is_power_of_2(size) || (size > sizeof(buf)))
857 return H_TOO_HARD;
858
859 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
860 ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf);
861 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
862 if (ret != 0)
863 return H_TOO_HARD;
864
865 switch (size) {
866 case 1:
867 kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf);
868 break;
869
870 case 2:
871 kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf));
872 break;
873
874 case 4:
875 kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf));
876 break;
877
878 case 8:
879 kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf));
880 break;
881
882 default:
883 BUG();
884 }
885
886 return H_SUCCESS;
887 }
888 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load);
889
890 int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu)
891 {
892 unsigned long size = kvmppc_get_gpr(vcpu, 4);
893 unsigned long addr = kvmppc_get_gpr(vcpu, 5);
894 unsigned long val = kvmppc_get_gpr(vcpu, 6);
895 u64 buf;
896 int srcu_idx;
897 int ret;
898
899 switch (size) {
900 case 1:
901 *(u8 *)&buf = val;
902 break;
903
904 case 2:
905 *(__be16 *)&buf = cpu_to_be16(val);
906 break;
907
908 case 4:
909 *(__be32 *)&buf = cpu_to_be32(val);
910 break;
911
912 case 8:
913 *(__be64 *)&buf = cpu_to_be64(val);
914 break;
915
916 default:
917 return H_TOO_HARD;
918 }
919
920 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
921 ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf);
922 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
923 if (ret != 0)
924 return H_TOO_HARD;
925
926 return H_SUCCESS;
927 }
928 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store);
929
930 int kvmppc_core_check_processor_compat(void)
931 {
932 /*
933 * We always return 0 for book3s. We check
934 * for compatibility while loading the HV
935 * or PR module
936 */
937 return 0;
938 }
939
940 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
941 {
942 return kvm->arch.kvm_ops->hcall_implemented(hcall);
943 }
944
945 static int kvmppc_book3s_init(void)
946 {
947 int r;
948
949 r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
950 if (r)
951 return r;
952 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
953 r = kvmppc_book3s_init_pr();
954 #endif
955 return r;
956
957 }
958
959 static void kvmppc_book3s_exit(void)
960 {
961 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
962 kvmppc_book3s_exit_pr();
963 #endif
964 kvm_exit();
965 }
966
967 module_init(kvmppc_book3s_init);
968 module_exit(kvmppc_book3s_exit);
969
970 /* On 32bit this is our one and only kernel module */
971 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
972 MODULE_ALIAS_MISCDEV(KVM_MINOR);
973 MODULE_ALIAS("devname:kvm");
974 #endif
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