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KVM: PPC: Book3S HV: Native usage of the XIVE interrupt controller
[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 #include <linux/gfp.h>
24 #include <linux/sched.h>
25 #include <linux/vmalloc.h>
26 #include <linux/highmem.h>
27
28 #include <asm/reg.h>
29 #include <asm/cputable.h>
30 #include <asm/cacheflush.h>
31 #include <asm/tlbflush.h>
32 #include <linux/uaccess.h>
33 #include <asm/io.h>
34 #include <asm/kvm_ppc.h>
35 #include <asm/kvm_book3s.h>
36 #include <asm/mmu_context.h>
37 #include <asm/page.h>
38 #include <asm/xive.h>
39
40 #include "book3s.h"
41 #include "trace.h"
42
43 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
44
45 /* #define EXIT_DEBUG */
46
47 struct kvm_stats_debugfs_item debugfs_entries[] = {
48 { "exits", VCPU_STAT(sum_exits) },
49 { "mmio", VCPU_STAT(mmio_exits) },
50 { "sig", VCPU_STAT(signal_exits) },
51 { "sysc", VCPU_STAT(syscall_exits) },
52 { "inst_emu", VCPU_STAT(emulated_inst_exits) },
53 { "dec", VCPU_STAT(dec_exits) },
54 { "ext_intr", VCPU_STAT(ext_intr_exits) },
55 { "queue_intr", VCPU_STAT(queue_intr) },
56 { "halt_poll_success_ns", VCPU_STAT(halt_poll_success_ns) },
57 { "halt_poll_fail_ns", VCPU_STAT(halt_poll_fail_ns) },
58 { "halt_wait_ns", VCPU_STAT(halt_wait_ns) },
59 { "halt_successful_poll", VCPU_STAT(halt_successful_poll), },
60 { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll), },
61 { "halt_successful_wait", VCPU_STAT(halt_successful_wait) },
62 { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
63 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
64 { "pf_storage", VCPU_STAT(pf_storage) },
65 { "sp_storage", VCPU_STAT(sp_storage) },
66 { "pf_instruc", VCPU_STAT(pf_instruc) },
67 { "sp_instruc", VCPU_STAT(sp_instruc) },
68 { "ld", VCPU_STAT(ld) },
69 { "ld_slow", VCPU_STAT(ld_slow) },
70 { "st", VCPU_STAT(st) },
71 { "st_slow", VCPU_STAT(st_slow) },
72 { "pthru_all", VCPU_STAT(pthru_all) },
73 { "pthru_host", VCPU_STAT(pthru_host) },
74 { "pthru_bad_aff", VCPU_STAT(pthru_bad_aff) },
75 { NULL }
76 };
77
78 void kvmppc_unfixup_split_real(struct kvm_vcpu *vcpu)
79 {
80 if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) {
81 ulong pc = kvmppc_get_pc(vcpu);
82 if ((pc & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS)
83 kvmppc_set_pc(vcpu, pc & ~SPLIT_HACK_MASK);
84 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SPLIT_HACK;
85 }
86 }
87 EXPORT_SYMBOL_GPL(kvmppc_unfixup_split_real);
88
89 static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
90 {
91 if (!is_kvmppc_hv_enabled(vcpu->kvm))
92 return to_book3s(vcpu)->hior;
93 return 0;
94 }
95
96 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
97 unsigned long pending_now, unsigned long old_pending)
98 {
99 if (is_kvmppc_hv_enabled(vcpu->kvm))
100 return;
101 if (pending_now)
102 kvmppc_set_int_pending(vcpu, 1);
103 else if (old_pending)
104 kvmppc_set_int_pending(vcpu, 0);
105 }
106
107 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
108 {
109 ulong crit_raw;
110 ulong crit_r1;
111 bool crit;
112
113 if (is_kvmppc_hv_enabled(vcpu->kvm))
114 return false;
115
116 crit_raw = kvmppc_get_critical(vcpu);
117 crit_r1 = kvmppc_get_gpr(vcpu, 1);
118
119 /* Truncate crit indicators in 32 bit mode */
120 if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
121 crit_raw &= 0xffffffff;
122 crit_r1 &= 0xffffffff;
123 }
124
125 /* Critical section when crit == r1 */
126 crit = (crit_raw == crit_r1);
127 /* ... and we're in supervisor mode */
128 crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
129
130 return crit;
131 }
132
133 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
134 {
135 kvmppc_unfixup_split_real(vcpu);
136 kvmppc_set_srr0(vcpu, kvmppc_get_pc(vcpu));
137 kvmppc_set_srr1(vcpu, kvmppc_get_msr(vcpu) | flags);
138 kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
139 vcpu->arch.mmu.reset_msr(vcpu);
140 }
141
142 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
143 {
144 unsigned int prio;
145
146 switch (vec) {
147 case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break;
148 case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break;
149 case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break;
150 case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break;
151 case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break;
152 case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break;
153 case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break;
154 case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL; break;
155 case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break;
156 case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break;
157 case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break;
158 case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break;
159 case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break;
160 case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break;
161 case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break;
162 case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break;
163 case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL; break;
164 default: prio = BOOK3S_IRQPRIO_MAX; break;
165 }
166
167 return prio;
168 }
169
170 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
171 unsigned int vec)
172 {
173 unsigned long old_pending = vcpu->arch.pending_exceptions;
174
175 clear_bit(kvmppc_book3s_vec2irqprio(vec),
176 &vcpu->arch.pending_exceptions);
177
178 kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
179 old_pending);
180 }
181
182 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
183 {
184 vcpu->stat.queue_intr++;
185
186 set_bit(kvmppc_book3s_vec2irqprio(vec),
187 &vcpu->arch.pending_exceptions);
188 #ifdef EXIT_DEBUG
189 printk(KERN_INFO "Queueing interrupt %x\n", vec);
190 #endif
191 }
192 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
193
194 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
195 {
196 /* might as well deliver this straight away */
197 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
198 }
199 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
200
201 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
202 {
203 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
204 }
205 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
206
207 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
208 {
209 return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
210 }
211 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
212
213 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
214 {
215 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
216 }
217 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
218
219 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
220 struct kvm_interrupt *irq)
221 {
222 unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
223
224 if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
225 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
226
227 kvmppc_book3s_queue_irqprio(vcpu, vec);
228 }
229
230 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
231 {
232 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
233 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
234 }
235
236 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
237 ulong flags)
238 {
239 kvmppc_set_dar(vcpu, dar);
240 kvmppc_set_dsisr(vcpu, flags);
241 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE);
242 }
243 EXPORT_SYMBOL_GPL(kvmppc_core_queue_data_storage); /* used by kvm_hv */
244
245 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
246 {
247 u64 msr = kvmppc_get_msr(vcpu);
248 msr &= ~(SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
249 msr |= flags & (SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
250 kvmppc_set_msr_fast(vcpu, msr);
251 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
252 }
253
254 static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu,
255 unsigned int priority)
256 {
257 int deliver = 1;
258 int vec = 0;
259 bool crit = kvmppc_critical_section(vcpu);
260
261 switch (priority) {
262 case BOOK3S_IRQPRIO_DECREMENTER:
263 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
264 vec = BOOK3S_INTERRUPT_DECREMENTER;
265 break;
266 case BOOK3S_IRQPRIO_EXTERNAL:
267 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
268 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
269 vec = BOOK3S_INTERRUPT_EXTERNAL;
270 break;
271 case BOOK3S_IRQPRIO_SYSTEM_RESET:
272 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
273 break;
274 case BOOK3S_IRQPRIO_MACHINE_CHECK:
275 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
276 break;
277 case BOOK3S_IRQPRIO_DATA_STORAGE:
278 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
279 break;
280 case BOOK3S_IRQPRIO_INST_STORAGE:
281 vec = BOOK3S_INTERRUPT_INST_STORAGE;
282 break;
283 case BOOK3S_IRQPRIO_DATA_SEGMENT:
284 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
285 break;
286 case BOOK3S_IRQPRIO_INST_SEGMENT:
287 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
288 break;
289 case BOOK3S_IRQPRIO_ALIGNMENT:
290 vec = BOOK3S_INTERRUPT_ALIGNMENT;
291 break;
292 case BOOK3S_IRQPRIO_PROGRAM:
293 vec = BOOK3S_INTERRUPT_PROGRAM;
294 break;
295 case BOOK3S_IRQPRIO_VSX:
296 vec = BOOK3S_INTERRUPT_VSX;
297 break;
298 case BOOK3S_IRQPRIO_ALTIVEC:
299 vec = BOOK3S_INTERRUPT_ALTIVEC;
300 break;
301 case BOOK3S_IRQPRIO_FP_UNAVAIL:
302 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
303 break;
304 case BOOK3S_IRQPRIO_SYSCALL:
305 vec = BOOK3S_INTERRUPT_SYSCALL;
306 break;
307 case BOOK3S_IRQPRIO_DEBUG:
308 vec = BOOK3S_INTERRUPT_TRACE;
309 break;
310 case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
311 vec = BOOK3S_INTERRUPT_PERFMON;
312 break;
313 case BOOK3S_IRQPRIO_FAC_UNAVAIL:
314 vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
315 break;
316 default:
317 deliver = 0;
318 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
319 break;
320 }
321
322 #if 0
323 printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
324 #endif
325
326 if (deliver)
327 kvmppc_inject_interrupt(vcpu, vec, 0);
328
329 return deliver;
330 }
331
332 /*
333 * This function determines if an irqprio should be cleared once issued.
334 */
335 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
336 {
337 switch (priority) {
338 case BOOK3S_IRQPRIO_DECREMENTER:
339 /* DEC interrupts get cleared by mtdec */
340 return false;
341 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
342 /* External interrupts get cleared by userspace */
343 return false;
344 }
345
346 return true;
347 }
348
349 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
350 {
351 unsigned long *pending = &vcpu->arch.pending_exceptions;
352 unsigned long old_pending = vcpu->arch.pending_exceptions;
353 unsigned int priority;
354
355 #ifdef EXIT_DEBUG
356 if (vcpu->arch.pending_exceptions)
357 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
358 #endif
359 priority = __ffs(*pending);
360 while (priority < BOOK3S_IRQPRIO_MAX) {
361 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
362 clear_irqprio(vcpu, priority)) {
363 clear_bit(priority, &vcpu->arch.pending_exceptions);
364 break;
365 }
366
367 priority = find_next_bit(pending,
368 BITS_PER_BYTE * sizeof(*pending),
369 priority + 1);
370 }
371
372 /* Tell the guest about our interrupt status */
373 kvmppc_update_int_pending(vcpu, *pending, old_pending);
374
375 return 0;
376 }
377 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
378
379 kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
380 bool *writable)
381 {
382 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
383 gfn_t gfn = gpa >> PAGE_SHIFT;
384
385 if (!(kvmppc_get_msr(vcpu) & MSR_SF))
386 mp_pa = (uint32_t)mp_pa;
387
388 /* Magic page override */
389 gpa &= ~0xFFFULL;
390 if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
391 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
392 kvm_pfn_t pfn;
393
394 pfn = (kvm_pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
395 get_page(pfn_to_page(pfn));
396 if (writable)
397 *writable = true;
398 return pfn;
399 }
400
401 return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
402 }
403 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
404
405 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
406 enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
407 {
408 bool data = (xlid == XLATE_DATA);
409 bool iswrite = (xlrw == XLATE_WRITE);
410 int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
411 int r;
412
413 if (relocated) {
414 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
415 } else {
416 pte->eaddr = eaddr;
417 pte->raddr = eaddr & KVM_PAM;
418 pte->vpage = VSID_REAL | eaddr >> 12;
419 pte->may_read = true;
420 pte->may_write = true;
421 pte->may_execute = true;
422 r = 0;
423
424 if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
425 !data) {
426 if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
427 ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
428 pte->raddr &= ~SPLIT_HACK_MASK;
429 }
430 }
431
432 return r;
433 }
434
435 int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, enum instruction_type type,
436 u32 *inst)
437 {
438 ulong pc = kvmppc_get_pc(vcpu);
439 int r;
440
441 if (type == INST_SC)
442 pc -= 4;
443
444 r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
445 if (r == EMULATE_DONE)
446 return r;
447 else
448 return EMULATE_AGAIN;
449 }
450 EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);
451
452 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
453 {
454 return 0;
455 }
456
457 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
458 {
459 return 0;
460 }
461
462 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
463 {
464 }
465
466 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
467 struct kvm_sregs *sregs)
468 {
469 return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
470 }
471
472 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
473 struct kvm_sregs *sregs)
474 {
475 return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
476 }
477
478 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
479 {
480 int i;
481
482 regs->pc = kvmppc_get_pc(vcpu);
483 regs->cr = kvmppc_get_cr(vcpu);
484 regs->ctr = kvmppc_get_ctr(vcpu);
485 regs->lr = kvmppc_get_lr(vcpu);
486 regs->xer = kvmppc_get_xer(vcpu);
487 regs->msr = kvmppc_get_msr(vcpu);
488 regs->srr0 = kvmppc_get_srr0(vcpu);
489 regs->srr1 = kvmppc_get_srr1(vcpu);
490 regs->pid = vcpu->arch.pid;
491 regs->sprg0 = kvmppc_get_sprg0(vcpu);
492 regs->sprg1 = kvmppc_get_sprg1(vcpu);
493 regs->sprg2 = kvmppc_get_sprg2(vcpu);
494 regs->sprg3 = kvmppc_get_sprg3(vcpu);
495 regs->sprg4 = kvmppc_get_sprg4(vcpu);
496 regs->sprg5 = kvmppc_get_sprg5(vcpu);
497 regs->sprg6 = kvmppc_get_sprg6(vcpu);
498 regs->sprg7 = kvmppc_get_sprg7(vcpu);
499
500 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
501 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
502
503 return 0;
504 }
505
506 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
507 {
508 int i;
509
510 kvmppc_set_pc(vcpu, regs->pc);
511 kvmppc_set_cr(vcpu, regs->cr);
512 kvmppc_set_ctr(vcpu, regs->ctr);
513 kvmppc_set_lr(vcpu, regs->lr);
514 kvmppc_set_xer(vcpu, regs->xer);
515 kvmppc_set_msr(vcpu, regs->msr);
516 kvmppc_set_srr0(vcpu, regs->srr0);
517 kvmppc_set_srr1(vcpu, regs->srr1);
518 kvmppc_set_sprg0(vcpu, regs->sprg0);
519 kvmppc_set_sprg1(vcpu, regs->sprg1);
520 kvmppc_set_sprg2(vcpu, regs->sprg2);
521 kvmppc_set_sprg3(vcpu, regs->sprg3);
522 kvmppc_set_sprg4(vcpu, regs->sprg4);
523 kvmppc_set_sprg5(vcpu, regs->sprg5);
524 kvmppc_set_sprg6(vcpu, regs->sprg6);
525 kvmppc_set_sprg7(vcpu, regs->sprg7);
526
527 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
528 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
529
530 return 0;
531 }
532
533 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
534 {
535 return -ENOTSUPP;
536 }
537
538 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
539 {
540 return -ENOTSUPP;
541 }
542
543 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
544 union kvmppc_one_reg *val)
545 {
546 int r = 0;
547 long int i;
548
549 r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
550 if (r == -EINVAL) {
551 r = 0;
552 switch (id) {
553 case KVM_REG_PPC_DAR:
554 *val = get_reg_val(id, kvmppc_get_dar(vcpu));
555 break;
556 case KVM_REG_PPC_DSISR:
557 *val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
558 break;
559 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
560 i = id - KVM_REG_PPC_FPR0;
561 *val = get_reg_val(id, VCPU_FPR(vcpu, i));
562 break;
563 case KVM_REG_PPC_FPSCR:
564 *val = get_reg_val(id, vcpu->arch.fp.fpscr);
565 break;
566 #ifdef CONFIG_VSX
567 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
568 if (cpu_has_feature(CPU_FTR_VSX)) {
569 i = id - KVM_REG_PPC_VSR0;
570 val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
571 val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
572 } else {
573 r = -ENXIO;
574 }
575 break;
576 #endif /* CONFIG_VSX */
577 case KVM_REG_PPC_DEBUG_INST:
578 *val = get_reg_val(id, INS_TW);
579 break;
580 #ifdef CONFIG_KVM_XICS
581 case KVM_REG_PPC_ICP_STATE:
582 if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
583 r = -ENXIO;
584 break;
585 }
586 if (xive_enabled())
587 *val = get_reg_val(id, kvmppc_xive_get_icp(vcpu));
588 else
589 *val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
590 break;
591 #endif /* CONFIG_KVM_XICS */
592 case KVM_REG_PPC_FSCR:
593 *val = get_reg_val(id, vcpu->arch.fscr);
594 break;
595 case KVM_REG_PPC_TAR:
596 *val = get_reg_val(id, vcpu->arch.tar);
597 break;
598 case KVM_REG_PPC_EBBHR:
599 *val = get_reg_val(id, vcpu->arch.ebbhr);
600 break;
601 case KVM_REG_PPC_EBBRR:
602 *val = get_reg_val(id, vcpu->arch.ebbrr);
603 break;
604 case KVM_REG_PPC_BESCR:
605 *val = get_reg_val(id, vcpu->arch.bescr);
606 break;
607 case KVM_REG_PPC_IC:
608 *val = get_reg_val(id, vcpu->arch.ic);
609 break;
610 default:
611 r = -EINVAL;
612 break;
613 }
614 }
615
616 return r;
617 }
618
619 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
620 union kvmppc_one_reg *val)
621 {
622 int r = 0;
623 long int i;
624
625 r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
626 if (r == -EINVAL) {
627 r = 0;
628 switch (id) {
629 case KVM_REG_PPC_DAR:
630 kvmppc_set_dar(vcpu, set_reg_val(id, *val));
631 break;
632 case KVM_REG_PPC_DSISR:
633 kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
634 break;
635 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
636 i = id - KVM_REG_PPC_FPR0;
637 VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
638 break;
639 case KVM_REG_PPC_FPSCR:
640 vcpu->arch.fp.fpscr = set_reg_val(id, *val);
641 break;
642 #ifdef CONFIG_VSX
643 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
644 if (cpu_has_feature(CPU_FTR_VSX)) {
645 i = id - KVM_REG_PPC_VSR0;
646 vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
647 vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
648 } else {
649 r = -ENXIO;
650 }
651 break;
652 #endif /* CONFIG_VSX */
653 #ifdef CONFIG_KVM_XICS
654 case KVM_REG_PPC_ICP_STATE:
655 if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
656 r = -ENXIO;
657 break;
658 }
659 if (xive_enabled())
660 r = kvmppc_xive_set_icp(vcpu, set_reg_val(id, *val));
661 else
662 r = kvmppc_xics_set_icp(vcpu, set_reg_val(id, *val));
663 break;
664 #endif /* CONFIG_KVM_XICS */
665 case KVM_REG_PPC_FSCR:
666 vcpu->arch.fscr = set_reg_val(id, *val);
667 break;
668 case KVM_REG_PPC_TAR:
669 vcpu->arch.tar = set_reg_val(id, *val);
670 break;
671 case KVM_REG_PPC_EBBHR:
672 vcpu->arch.ebbhr = set_reg_val(id, *val);
673 break;
674 case KVM_REG_PPC_EBBRR:
675 vcpu->arch.ebbrr = set_reg_val(id, *val);
676 break;
677 case KVM_REG_PPC_BESCR:
678 vcpu->arch.bescr = set_reg_val(id, *val);
679 break;
680 case KVM_REG_PPC_IC:
681 vcpu->arch.ic = set_reg_val(id, *val);
682 break;
683 default:
684 r = -EINVAL;
685 break;
686 }
687 }
688
689 return r;
690 }
691
692 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
693 {
694 vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
695 }
696
697 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
698 {
699 vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
700 }
701
702 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
703 {
704 vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
705 }
706 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
707
708 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
709 {
710 return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
711 }
712
713 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
714 struct kvm_translation *tr)
715 {
716 return 0;
717 }
718
719 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
720 struct kvm_guest_debug *dbg)
721 {
722 vcpu->guest_debug = dbg->control;
723 return 0;
724 }
725
726 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
727 {
728 kvmppc_core_queue_dec(vcpu);
729 kvm_vcpu_kick(vcpu);
730 }
731
732 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
733 {
734 return kvm->arch.kvm_ops->vcpu_create(kvm, id);
735 }
736
737 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
738 {
739 vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
740 }
741
742 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
743 {
744 return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
745 }
746
747 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
748 {
749 return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
750 }
751
752 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
753 struct kvm_memory_slot *dont)
754 {
755 kvm->arch.kvm_ops->free_memslot(free, dont);
756 }
757
758 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
759 unsigned long npages)
760 {
761 return kvm->arch.kvm_ops->create_memslot(slot, npages);
762 }
763
764 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
765 {
766 kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
767 }
768
769 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
770 struct kvm_memory_slot *memslot,
771 const struct kvm_userspace_memory_region *mem)
772 {
773 return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
774 }
775
776 void kvmppc_core_commit_memory_region(struct kvm *kvm,
777 const struct kvm_userspace_memory_region *mem,
778 const struct kvm_memory_slot *old,
779 const struct kvm_memory_slot *new)
780 {
781 kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new);
782 }
783
784 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
785 {
786 return kvm->arch.kvm_ops->unmap_hva(kvm, hva);
787 }
788 EXPORT_SYMBOL_GPL(kvm_unmap_hva);
789
790 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
791 {
792 return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
793 }
794
795 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
796 {
797 return kvm->arch.kvm_ops->age_hva(kvm, start, end);
798 }
799
800 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
801 {
802 return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
803 }
804
805 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
806 {
807 kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
808 }
809
810 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
811 {
812 vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
813 }
814
815 int kvmppc_core_init_vm(struct kvm *kvm)
816 {
817
818 #ifdef CONFIG_PPC64
819 INIT_LIST_HEAD_RCU(&kvm->arch.spapr_tce_tables);
820 INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
821 #endif
822
823 return kvm->arch.kvm_ops->init_vm(kvm);
824 }
825
826 void kvmppc_core_destroy_vm(struct kvm *kvm)
827 {
828 kvm->arch.kvm_ops->destroy_vm(kvm);
829
830 #ifdef CONFIG_PPC64
831 kvmppc_rtas_tokens_free(kvm);
832 WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
833 #endif
834 }
835
836 int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu)
837 {
838 unsigned long size = kvmppc_get_gpr(vcpu, 4);
839 unsigned long addr = kvmppc_get_gpr(vcpu, 5);
840 u64 buf;
841 int srcu_idx;
842 int ret;
843
844 if (!is_power_of_2(size) || (size > sizeof(buf)))
845 return H_TOO_HARD;
846
847 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
848 ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf);
849 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
850 if (ret != 0)
851 return H_TOO_HARD;
852
853 switch (size) {
854 case 1:
855 kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf);
856 break;
857
858 case 2:
859 kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf));
860 break;
861
862 case 4:
863 kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf));
864 break;
865
866 case 8:
867 kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf));
868 break;
869
870 default:
871 BUG();
872 }
873
874 return H_SUCCESS;
875 }
876 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load);
877
878 int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu)
879 {
880 unsigned long size = kvmppc_get_gpr(vcpu, 4);
881 unsigned long addr = kvmppc_get_gpr(vcpu, 5);
882 unsigned long val = kvmppc_get_gpr(vcpu, 6);
883 u64 buf;
884 int srcu_idx;
885 int ret;
886
887 switch (size) {
888 case 1:
889 *(u8 *)&buf = val;
890 break;
891
892 case 2:
893 *(__be16 *)&buf = cpu_to_be16(val);
894 break;
895
896 case 4:
897 *(__be32 *)&buf = cpu_to_be32(val);
898 break;
899
900 case 8:
901 *(__be64 *)&buf = cpu_to_be64(val);
902 break;
903
904 default:
905 return H_TOO_HARD;
906 }
907
908 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
909 ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf);
910 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
911 if (ret != 0)
912 return H_TOO_HARD;
913
914 return H_SUCCESS;
915 }
916 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store);
917
918 int kvmppc_core_check_processor_compat(void)
919 {
920 /*
921 * We always return 0 for book3s. We check
922 * for compatibility while loading the HV
923 * or PR module
924 */
925 return 0;
926 }
927
928 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
929 {
930 return kvm->arch.kvm_ops->hcall_implemented(hcall);
931 }
932
933 #ifdef CONFIG_KVM_XICS
934 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
935 bool line_status)
936 {
937 if (xive_enabled())
938 return kvmppc_xive_set_irq(kvm, irq_source_id, irq, level,
939 line_status);
940 else
941 return kvmppc_xics_set_irq(kvm, irq_source_id, irq, level,
942 line_status);
943 }
944
945 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *irq_entry,
946 struct kvm *kvm, int irq_source_id,
947 int level, bool line_status)
948 {
949 return kvm_set_irq(kvm, irq_source_id, irq_entry->gsi,
950 level, line_status);
951 }
952 static int kvmppc_book3s_set_irq(struct kvm_kernel_irq_routing_entry *e,
953 struct kvm *kvm, int irq_source_id, int level,
954 bool line_status)
955 {
956 return kvm_set_irq(kvm, irq_source_id, e->gsi, level, line_status);
957 }
958
959 int kvm_irq_map_gsi(struct kvm *kvm,
960 struct kvm_kernel_irq_routing_entry *entries, int gsi)
961 {
962 entries->gsi = gsi;
963 entries->type = KVM_IRQ_ROUTING_IRQCHIP;
964 entries->set = kvmppc_book3s_set_irq;
965 entries->irqchip.irqchip = 0;
966 entries->irqchip.pin = gsi;
967 return 1;
968 }
969
970 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin)
971 {
972 return pin;
973 }
974
975 #endif /* CONFIG_KVM_XICS */
976
977 static int kvmppc_book3s_init(void)
978 {
979 int r;
980
981 r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
982 if (r)
983 return r;
984 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
985 r = kvmppc_book3s_init_pr();
986 #endif
987
988 #ifdef CONFIG_KVM_XICS
989 #ifdef CONFIG_KVM_XIVE
990 if (xive_enabled()) {
991 kvmppc_xive_init_module();
992 kvm_register_device_ops(&kvm_xive_ops, KVM_DEV_TYPE_XICS);
993 } else
994 #endif
995 kvm_register_device_ops(&kvm_xics_ops, KVM_DEV_TYPE_XICS);
996 #endif
997 return r;
998 }
999
1000 static void kvmppc_book3s_exit(void)
1001 {
1002 #ifdef CONFIG_KVM_XICS
1003 if (xive_enabled())
1004 kvmppc_xive_exit_module();
1005 #endif
1006 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1007 kvmppc_book3s_exit_pr();
1008 #endif
1009 kvm_exit();
1010 }
1011
1012 module_init(kvmppc_book3s_init);
1013 module_exit(kvmppc_book3s_exit);
1014
1015 /* On 32bit this is our one and only kernel module */
1016 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1017 MODULE_ALIAS_MISCDEV(KVM_MINOR);
1018 MODULE_ALIAS("devname:kvm");
1019 #endif
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