?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / arch / powerpc / kvm / book3s.c
blobd07a8e12fa15649def7c790e9873782bbb20e2d4
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
4 *
5 * Authors:
6 * Alexander Graf <agraf@suse.de>
7 * Kevin Wolf <mail@kevin-wolf.de>
8 *
9 * Description:
10 * This file is derived from arch/powerpc/kvm/44x.c,
11 * by Hollis Blanchard <hollisb@us.ibm.com>.
12 */
13
14 #include <linux/kvm_host.h>
15 #include <linux/err.h>
16 #include <linux/export.h>
17 #include <linux/slab.h>
18 #include <linux/module.h>
19 #include <linux/miscdevice.h>
20 #include <linux/gfp.h>
21 #include <linux/sched.h>
22 #include <linux/vmalloc.h>
23 #include <linux/highmem.h>
24
25 #include <asm/reg.h>
26 #include <asm/cputable.h>
27 #include <asm/cacheflush.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 <asm/xive.h>
35
36 #include "book3s.h"
37 #include "trace.h"
38
39 #define VM_STAT(x, ...) offsetof(struct kvm, stat.x), KVM_STAT_VM, ## __VA_ARGS__
40 #define VCPU_STAT(x, ...) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU, ## __VA_ARGS__
41
42 /* #define EXIT_DEBUG */
43
44 struct kvm_stats_debugfs_item debugfs_entries[] = {
45 { "exits", VCPU_STAT(sum_exits) },
46 { "mmio", VCPU_STAT(mmio_exits) },
47 { "sig", VCPU_STAT(signal_exits) },
48 { "sysc", VCPU_STAT(syscall_exits) },
49 { "inst_emu", VCPU_STAT(emulated_inst_exits) },
50 { "dec", VCPU_STAT(dec_exits) },
51 { "ext_intr", VCPU_STAT(ext_intr_exits) },
52 { "queue_intr", VCPU_STAT(queue_intr) },
53 { "halt_poll_success_ns", VCPU_STAT(halt_poll_success_ns) },
54 { "halt_poll_fail_ns", VCPU_STAT(halt_poll_fail_ns) },
55 { "halt_wait_ns", VCPU_STAT(halt_wait_ns) },
56 { "halt_successful_poll", VCPU_STAT(halt_successful_poll), },
57 { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll), },
58 { "halt_successful_wait", VCPU_STAT(halt_successful_wait) },
59 { "halt_poll_invalid", VCPU_STAT(halt_poll_invalid) },
60 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
61 { "pf_storage", VCPU_STAT(pf_storage) },
62 { "sp_storage", VCPU_STAT(sp_storage) },
63 { "pf_instruc", VCPU_STAT(pf_instruc) },
64 { "sp_instruc", VCPU_STAT(sp_instruc) },
65 { "ld", VCPU_STAT(ld) },
66 { "ld_slow", VCPU_STAT(ld_slow) },
67 { "st", VCPU_STAT(st) },
68 { "st_slow", VCPU_STAT(st_slow) },
69 { "pthru_all", VCPU_STAT(pthru_all) },
70 { "pthru_host", VCPU_STAT(pthru_host) },
71 { "pthru_bad_aff", VCPU_STAT(pthru_bad_aff) },
72 { "largepages_2M", VM_STAT(num_2M_pages, .mode = 0444) },
73 { "largepages_1G", VM_STAT(num_1G_pages, .mode = 0444) },
74 { NULL }
75 };
76
77 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
78 unsigned long pending_now, unsigned long old_pending)
79 {
80 if (is_kvmppc_hv_enabled(vcpu->kvm))
81 return;
82 if (pending_now)
83 kvmppc_set_int_pending(vcpu, 1);
84 else if (old_pending)
85 kvmppc_set_int_pending(vcpu, 0);
86 }
87
88 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
89 {
90 ulong crit_raw;
91 ulong crit_r1;
92 bool crit;
93
94 if (is_kvmppc_hv_enabled(vcpu->kvm))
95 return false;
96
97 crit_raw = kvmppc_get_critical(vcpu);
98 crit_r1 = kvmppc_get_gpr(vcpu, 1);
99
100 /* Truncate crit indicators in 32 bit mode */
101 if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
102 crit_raw &= 0xffffffff;
103 crit_r1 &= 0xffffffff;
104 }
105
106 /* Critical section when crit == r1 */
107 crit = (crit_raw == crit_r1);
108 /* ... and we're in supervisor mode */
109 crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
110
111 return crit;
112 }
113
114 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
115 {
116 vcpu->kvm->arch.kvm_ops->inject_interrupt(vcpu, vec, flags);
117 }
118
119 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
120 {
121 unsigned int prio;
122
123 switch (vec) {
124 case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break;
125 case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break;
126 case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break;
127 case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break;
128 case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break;
129 case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break;
130 case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break;
131 case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break;
132 case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break;
133 case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break;
134 case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break;
135 case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break;
136 case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break;
137 case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break;
138 case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break;
139 case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL; break;
140 default: prio = BOOK3S_IRQPRIO_MAX; break;
141 }
142
143 return prio;
144 }
145
146 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
147 unsigned int vec)
148 {
149 unsigned long old_pending = vcpu->arch.pending_exceptions;
150
151 clear_bit(kvmppc_book3s_vec2irqprio(vec),
152 &vcpu->arch.pending_exceptions);
153
154 kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
155 old_pending);
156 }
157
158 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
159 {
160 vcpu->stat.queue_intr++;
161
162 set_bit(kvmppc_book3s_vec2irqprio(vec),
163 &vcpu->arch.pending_exceptions);
164 #ifdef EXIT_DEBUG
165 printk(KERN_INFO "Queueing interrupt %x\n", vec);
166 #endif
167 }
168 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
169
170 void kvmppc_core_queue_machine_check(struct kvm_vcpu *vcpu, ulong flags)
171 {
172 /* might as well deliver this straight away */
173 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_MACHINE_CHECK, flags);
174 }
175 EXPORT_SYMBOL_GPL(kvmppc_core_queue_machine_check);
176
177 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
178 {
179 /* might as well deliver this straight away */
180 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
181 }
182 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
183
184 void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu)
185 {
186 /* might as well deliver this straight away */
187 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, 0);
188 }
189
190 void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu)
191 {
192 /* might as well deliver this straight away */
193 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_ALTIVEC, 0);
194 }
195
196 void kvmppc_core_queue_vsx_unavail(struct kvm_vcpu *vcpu)
197 {
198 /* might as well deliver this straight away */
199 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_VSX, 0);
200 }
201
202 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
203 {
204 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
205 }
206 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
207
208 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
209 {
210 return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
211 }
212 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
213
214 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
215 {
216 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
217 }
218 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
219
220 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
221 struct kvm_interrupt *irq)
222 {
223 /*
224 * This case (KVM_INTERRUPT_SET) should never actually arise for
225 * a pseries guest (because pseries guests expect their interrupt
226 * controllers to continue asserting an external interrupt request
227 * until it is acknowledged at the interrupt controller), but is
228 * included to avoid ABI breakage and potentially for other
229 * sorts of guest.
230 *
231 * There is a subtlety here: HV KVM does not test the
232 * external_oneshot flag in the code that synthesizes
233 * external interrupts for the guest just before entering
234 * the guest. That is OK even if userspace did do a
235 * KVM_INTERRUPT_SET on a pseries guest vcpu, because the
236 * caller (kvm_vcpu_ioctl_interrupt) does a kvm_vcpu_kick()
237 * which ends up doing a smp_send_reschedule(), which will
238 * pull the guest all the way out to the host, meaning that
239 * we will call kvmppc_core_prepare_to_enter() before entering
240 * the guest again, and that will handle the external_oneshot
241 * flag correctly.
242 */
243 if (irq->irq == KVM_INTERRUPT_SET)
244 vcpu->arch.external_oneshot = 1;
245
246 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
247 }
248
249 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
250 {
251 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
252 }
253
254 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
255 ulong flags)
256 {
257 kvmppc_set_dar(vcpu, dar);
258 kvmppc_set_dsisr(vcpu, flags);
259 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE, 0);
260 }
261 EXPORT_SYMBOL_GPL(kvmppc_core_queue_data_storage);
262
263 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
264 {
265 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_INST_STORAGE, flags);
266 }
267 EXPORT_SYMBOL_GPL(kvmppc_core_queue_inst_storage);
268
269 static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu,
270 unsigned int priority)
271 {
272 int deliver = 1;
273 int vec = 0;
274 bool crit = kvmppc_critical_section(vcpu);
275
276 switch (priority) {
277 case BOOK3S_IRQPRIO_DECREMENTER:
278 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
279 vec = BOOK3S_INTERRUPT_DECREMENTER;
280 break;
281 case BOOK3S_IRQPRIO_EXTERNAL:
282 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
283 vec = BOOK3S_INTERRUPT_EXTERNAL;
284 break;
285 case BOOK3S_IRQPRIO_SYSTEM_RESET:
286 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
287 break;
288 case BOOK3S_IRQPRIO_MACHINE_CHECK:
289 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
290 break;
291 case BOOK3S_IRQPRIO_DATA_STORAGE:
292 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
293 break;
294 case BOOK3S_IRQPRIO_INST_STORAGE:
295 vec = BOOK3S_INTERRUPT_INST_STORAGE;
296 break;
297 case BOOK3S_IRQPRIO_DATA_SEGMENT:
298 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
299 break;
300 case BOOK3S_IRQPRIO_INST_SEGMENT:
301 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
302 break;
303 case BOOK3S_IRQPRIO_ALIGNMENT:
304 vec = BOOK3S_INTERRUPT_ALIGNMENT;
305 break;
306 case BOOK3S_IRQPRIO_PROGRAM:
307 vec = BOOK3S_INTERRUPT_PROGRAM;
308 break;
309 case BOOK3S_IRQPRIO_VSX:
310 vec = BOOK3S_INTERRUPT_VSX;
311 break;
312 case BOOK3S_IRQPRIO_ALTIVEC:
313 vec = BOOK3S_INTERRUPT_ALTIVEC;
314 break;
315 case BOOK3S_IRQPRIO_FP_UNAVAIL:
316 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
317 break;
318 case BOOK3S_IRQPRIO_SYSCALL:
319 vec = BOOK3S_INTERRUPT_SYSCALL;
320 break;
321 case BOOK3S_IRQPRIO_DEBUG:
322 vec = BOOK3S_INTERRUPT_TRACE;
323 break;
324 case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
325 vec = BOOK3S_INTERRUPT_PERFMON;
326 break;
327 case BOOK3S_IRQPRIO_FAC_UNAVAIL:
328 vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
329 break;
330 default:
331 deliver = 0;
332 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
333 break;
334 }
335
336 #if 0
337 printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
338 #endif
339
340 if (deliver)
341 kvmppc_inject_interrupt(vcpu, vec, 0);
342
343 return deliver;
344 }
345
346 /*
347 * This function determines if an irqprio should be cleared once issued.
348 */
349 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
350 {
351 switch (priority) {
352 case BOOK3S_IRQPRIO_DECREMENTER:
353 /* DEC interrupts get cleared by mtdec */
354 return false;
355 case BOOK3S_IRQPRIO_EXTERNAL:
356 /*
357 * External interrupts get cleared by userspace
358 * except when set by the KVM_INTERRUPT ioctl with
359 * KVM_INTERRUPT_SET (not KVM_INTERRUPT_SET_LEVEL).
360 */
361 if (vcpu->arch.external_oneshot) {
362 vcpu->arch.external_oneshot = 0;
363 return true;
364 }
365 return false;
366 }
367
368 return true;
369 }
370
371 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
372 {
373 unsigned long *pending = &vcpu->arch.pending_exceptions;
374 unsigned long old_pending = vcpu->arch.pending_exceptions;
375 unsigned int priority;
376
377 #ifdef EXIT_DEBUG
378 if (vcpu->arch.pending_exceptions)
379 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
380 #endif
381 priority = __ffs(*pending);
382 while (priority < BOOK3S_IRQPRIO_MAX) {
383 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
384 clear_irqprio(vcpu, priority)) {
385 clear_bit(priority, &vcpu->arch.pending_exceptions);
386 break;
387 }
388
389 priority = find_next_bit(pending,
390 BITS_PER_BYTE * sizeof(*pending),
391 priority + 1);
392 }
393
394 /* Tell the guest about our interrupt status */
395 kvmppc_update_int_pending(vcpu, *pending, old_pending);
396
397 return 0;
398 }
399 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
400
401 kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
402 bool *writable)
403 {
404 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
405 gfn_t gfn = gpa >> PAGE_SHIFT;
406
407 if (!(kvmppc_get_msr(vcpu) & MSR_SF))
408 mp_pa = (uint32_t)mp_pa;
409
410 /* Magic page override */
411 gpa &= ~0xFFFULL;
412 if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
413 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
414 kvm_pfn_t pfn;
415
416 pfn = (kvm_pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
417 get_page(pfn_to_page(pfn));
418 if (writable)
419 *writable = true;
420 return pfn;
421 }
422
423 return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
424 }
425 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
426
427 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
428 enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
429 {
430 bool data = (xlid == XLATE_DATA);
431 bool iswrite = (xlrw == XLATE_WRITE);
432 int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
433 int r;
434
435 if (relocated) {
436 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
437 } else {
438 pte->eaddr = eaddr;
439 pte->raddr = eaddr & KVM_PAM;
440 pte->vpage = VSID_REAL | eaddr >> 12;
441 pte->may_read = true;
442 pte->may_write = true;
443 pte->may_execute = true;
444 r = 0;
445
446 if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
447 !data) {
448 if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
449 ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
450 pte->raddr &= ~SPLIT_HACK_MASK;
451 }
452 }
453
454 return r;
455 }
456
457 int kvmppc_load_last_inst(struct kvm_vcpu *vcpu,
458 enum instruction_fetch_type type, u32 *inst)
459 {
460 ulong pc = kvmppc_get_pc(vcpu);
461 int r;
462
463 if (type == INST_SC)
464 pc -= 4;
465
466 r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
467 if (r == EMULATE_DONE)
468 return r;
469 else
470 return EMULATE_AGAIN;
471 }
472 EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);
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 int ret;
487
488 vcpu_load(vcpu);
489 ret = vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
490 vcpu_put(vcpu);
491
492 return ret;
493 }
494
495 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
496 struct kvm_sregs *sregs)
497 {
498 int ret;
499
500 vcpu_load(vcpu);
501 ret = vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
502 vcpu_put(vcpu);
503
504 return ret;
505 }
506
507 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
508 {
509 int i;
510
511 regs->pc = kvmppc_get_pc(vcpu);
512 regs->cr = kvmppc_get_cr(vcpu);
513 regs->ctr = kvmppc_get_ctr(vcpu);
514 regs->lr = kvmppc_get_lr(vcpu);
515 regs->xer = kvmppc_get_xer(vcpu);
516 regs->msr = kvmppc_get_msr(vcpu);
517 regs->srr0 = kvmppc_get_srr0(vcpu);
518 regs->srr1 = kvmppc_get_srr1(vcpu);
519 regs->pid = vcpu->arch.pid;
520 regs->sprg0 = kvmppc_get_sprg0(vcpu);
521 regs->sprg1 = kvmppc_get_sprg1(vcpu);
522 regs->sprg2 = kvmppc_get_sprg2(vcpu);
523 regs->sprg3 = kvmppc_get_sprg3(vcpu);
524 regs->sprg4 = kvmppc_get_sprg4(vcpu);
525 regs->sprg5 = kvmppc_get_sprg5(vcpu);
526 regs->sprg6 = kvmppc_get_sprg6(vcpu);
527 regs->sprg7 = kvmppc_get_sprg7(vcpu);
528
529 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
530 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
531
532 return 0;
533 }
534
535 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
536 {
537 int i;
538
539 kvmppc_set_pc(vcpu, regs->pc);
540 kvmppc_set_cr(vcpu, regs->cr);
541 kvmppc_set_ctr(vcpu, regs->ctr);
542 kvmppc_set_lr(vcpu, regs->lr);
543 kvmppc_set_xer(vcpu, regs->xer);
544 kvmppc_set_msr(vcpu, regs->msr);
545 kvmppc_set_srr0(vcpu, regs->srr0);
546 kvmppc_set_srr1(vcpu, regs->srr1);
547 kvmppc_set_sprg0(vcpu, regs->sprg0);
548 kvmppc_set_sprg1(vcpu, regs->sprg1);
549 kvmppc_set_sprg2(vcpu, regs->sprg2);
550 kvmppc_set_sprg3(vcpu, regs->sprg3);
551 kvmppc_set_sprg4(vcpu, regs->sprg4);
552 kvmppc_set_sprg5(vcpu, regs->sprg5);
553 kvmppc_set_sprg6(vcpu, regs->sprg6);
554 kvmppc_set_sprg7(vcpu, regs->sprg7);
555
556 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
557 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
558
559 return 0;
560 }
561
562 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
563 {
564 return -ENOTSUPP;
565 }
566
567 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
568 {
569 return -ENOTSUPP;
570 }
571
572 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
573 union kvmppc_one_reg *val)
574 {
575 int r = 0;
576 long int i;
577
578 r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
579 if (r == -EINVAL) {
580 r = 0;
581 switch (id) {
582 case KVM_REG_PPC_DAR:
583 *val = get_reg_val(id, kvmppc_get_dar(vcpu));
584 break;
585 case KVM_REG_PPC_DSISR:
586 *val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
587 break;
588 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
589 i = id - KVM_REG_PPC_FPR0;
590 *val = get_reg_val(id, VCPU_FPR(vcpu, i));
591 break;
592 case KVM_REG_PPC_FPSCR:
593 *val = get_reg_val(id, vcpu->arch.fp.fpscr);
594 break;
595 #ifdef CONFIG_VSX
596 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
597 if (cpu_has_feature(CPU_FTR_VSX)) {
598 i = id - KVM_REG_PPC_VSR0;
599 val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
600 val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
601 } else {
602 r = -ENXIO;
603 }
604 break;
605 #endif /* CONFIG_VSX */
606 case KVM_REG_PPC_DEBUG_INST:
607 *val = get_reg_val(id, INS_TW);
608 break;
609 #ifdef CONFIG_KVM_XICS
610 case KVM_REG_PPC_ICP_STATE:
611 if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
612 r = -ENXIO;
613 break;
614 }
615 if (xics_on_xive())
616 *val = get_reg_val(id, kvmppc_xive_get_icp(vcpu));
617 else
618 *val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
619 break;
620 #endif /* CONFIG_KVM_XICS */
621 #ifdef CONFIG_KVM_XIVE
622 case KVM_REG_PPC_VP_STATE:
623 if (!vcpu->arch.xive_vcpu) {
624 r = -ENXIO;
625 break;
626 }
627 if (xive_enabled())
628 r = kvmppc_xive_native_get_vp(vcpu, val);
629 else
630 r = -ENXIO;
631 break;
632 #endif /* CONFIG_KVM_XIVE */
633 case KVM_REG_PPC_FSCR:
634 *val = get_reg_val(id, vcpu->arch.fscr);
635 break;
636 case KVM_REG_PPC_TAR:
637 *val = get_reg_val(id, vcpu->arch.tar);
638 break;
639 case KVM_REG_PPC_EBBHR:
640 *val = get_reg_val(id, vcpu->arch.ebbhr);
641 break;
642 case KVM_REG_PPC_EBBRR:
643 *val = get_reg_val(id, vcpu->arch.ebbrr);
644 break;
645 case KVM_REG_PPC_BESCR:
646 *val = get_reg_val(id, vcpu->arch.bescr);
647 break;
648 case KVM_REG_PPC_IC:
649 *val = get_reg_val(id, vcpu->arch.ic);
650 break;
651 default:
652 r = -EINVAL;
653 break;
654 }
655 }
656
657 return r;
658 }
659
660 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
661 union kvmppc_one_reg *val)
662 {
663 int r = 0;
664 long int i;
665
666 r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
667 if (r == -EINVAL) {
668 r = 0;
669 switch (id) {
670 case KVM_REG_PPC_DAR:
671 kvmppc_set_dar(vcpu, set_reg_val(id, *val));
672 break;
673 case KVM_REG_PPC_DSISR:
674 kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
675 break;
676 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
677 i = id - KVM_REG_PPC_FPR0;
678 VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
679 break;
680 case KVM_REG_PPC_FPSCR:
681 vcpu->arch.fp.fpscr = set_reg_val(id, *val);
682 break;
683 #ifdef CONFIG_VSX
684 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
685 if (cpu_has_feature(CPU_FTR_VSX)) {
686 i = id - KVM_REG_PPC_VSR0;
687 vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
688 vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
689 } else {
690 r = -ENXIO;
691 }
692 break;
693 #endif /* CONFIG_VSX */
694 #ifdef CONFIG_KVM_XICS
695 case KVM_REG_PPC_ICP_STATE:
696 if (!vcpu->arch.icp && !vcpu->arch.xive_vcpu) {
697 r = -ENXIO;
698 break;
699 }
700 if (xics_on_xive())
701 r = kvmppc_xive_set_icp(vcpu, set_reg_val(id, *val));
702 else
703 r = kvmppc_xics_set_icp(vcpu, set_reg_val(id, *val));
704 break;
705 #endif /* CONFIG_KVM_XICS */
706 #ifdef CONFIG_KVM_XIVE
707 case KVM_REG_PPC_VP_STATE:
708 if (!vcpu->arch.xive_vcpu) {
709 r = -ENXIO;
710 break;
711 }
712 if (xive_enabled())
713 r = kvmppc_xive_native_set_vp(vcpu, val);
714 else
715 r = -ENXIO;
716 break;
717 #endif /* CONFIG_KVM_XIVE */
718 case KVM_REG_PPC_FSCR:
719 vcpu->arch.fscr = set_reg_val(id, *val);
720 break;
721 case KVM_REG_PPC_TAR:
722 vcpu->arch.tar = set_reg_val(id, *val);
723 break;
724 case KVM_REG_PPC_EBBHR:
725 vcpu->arch.ebbhr = set_reg_val(id, *val);
726 break;
727 case KVM_REG_PPC_EBBRR:
728 vcpu->arch.ebbrr = set_reg_val(id, *val);
729 break;
730 case KVM_REG_PPC_BESCR:
731 vcpu->arch.bescr = set_reg_val(id, *val);
732 break;
733 case KVM_REG_PPC_IC:
734 vcpu->arch.ic = set_reg_val(id, *val);
735 break;
736 default:
737 r = -EINVAL;
738 break;
739 }
740 }
741
742 return r;
743 }
744
745 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
746 {
747 vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
748 }
749
750 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
751 {
752 vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
753 }
754
755 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
756 {
757 vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
758 }
759 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
760
761 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
762 {
763 return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
764 }
765
766 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
767 struct kvm_translation *tr)
768 {
769 return 0;
770 }
771
772 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
773 struct kvm_guest_debug *dbg)
774 {
775 vcpu_load(vcpu);
776 vcpu->guest_debug = dbg->control;
777 vcpu_put(vcpu);
778 return 0;
779 }
780
781 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
782 {
783 kvmppc_core_queue_dec(vcpu);
784 kvm_vcpu_kick(vcpu);
785 }
786
787 int kvmppc_core_vcpu_create(struct kvm_vcpu *vcpu)
788 {
789 return vcpu->kvm->arch.kvm_ops->vcpu_create(vcpu);
790 }
791
792 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
793 {
794 vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
795 }
796
797 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
798 {
799 return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
800 }
801
802 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
803 {
804 return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
805 }
806
807 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
808 struct kvm_memory_slot *dont)
809 {
810 kvm->arch.kvm_ops->free_memslot(free, dont);
811 }
812
813 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
814 unsigned long npages)
815 {
816 return kvm->arch.kvm_ops->create_memslot(slot, npages);
817 }
818
819 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
820 {
821 kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
822 }
823
824 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
825 struct kvm_memory_slot *memslot,
826 const struct kvm_userspace_memory_region *mem)
827 {
828 return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
829 }
830
831 void kvmppc_core_commit_memory_region(struct kvm *kvm,
832 const struct kvm_userspace_memory_region *mem,
833 const struct kvm_memory_slot *old,
834 const struct kvm_memory_slot *new,
835 enum kvm_mr_change change)
836 {
837 kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new, change);
838 }
839
840 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
841 {
842 return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
843 }
844
845 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
846 {
847 return kvm->arch.kvm_ops->age_hva(kvm, start, end);
848 }
849
850 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
851 {
852 return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
853 }
854
855 int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
856 {
857 kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
858 return 0;
859 }
860
861 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
862 {
863 vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
864 }
865
866 int kvmppc_core_init_vm(struct kvm *kvm)
867 {
868
869 #ifdef CONFIG_PPC64
870 INIT_LIST_HEAD_RCU(&kvm->arch.spapr_tce_tables);
871 INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
872 mutex_init(&kvm->arch.rtas_token_lock);
873 #endif
874
875 return kvm->arch.kvm_ops->init_vm(kvm);
876 }
877
878 void kvmppc_core_destroy_vm(struct kvm *kvm)
879 {
880 kvm->arch.kvm_ops->destroy_vm(kvm);
881
882 #ifdef CONFIG_PPC64
883 kvmppc_rtas_tokens_free(kvm);
884 WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
885 #endif
886
887 #ifdef CONFIG_KVM_XICS
888 /*
889 * Free the XIVE devices which are not directly freed by the
890 * device 'release' method
891 */
892 kfree(kvm->arch.xive_devices.native);
893 kvm->arch.xive_devices.native = NULL;
894 kfree(kvm->arch.xive_devices.xics_on_xive);
895 kvm->arch.xive_devices.xics_on_xive = NULL;
896 #endif /* CONFIG_KVM_XICS */
897 }
898
899 int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu)
900 {
901 unsigned long size = kvmppc_get_gpr(vcpu, 4);
902 unsigned long addr = kvmppc_get_gpr(vcpu, 5);
903 u64 buf;
904 int srcu_idx;
905 int ret;
906
907 if (!is_power_of_2(size) || (size > sizeof(buf)))
908 return H_TOO_HARD;
909
910 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
911 ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf);
912 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
913 if (ret != 0)
914 return H_TOO_HARD;
915
916 switch (size) {
917 case 1:
918 kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf);
919 break;
920
921 case 2:
922 kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf));
923 break;
924
925 case 4:
926 kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf));
927 break;
928
929 case 8:
930 kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf));
931 break;
932
933 default:
934 BUG();
935 }
936
937 return H_SUCCESS;
938 }
939 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load);
940
941 int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu)
942 {
943 unsigned long size = kvmppc_get_gpr(vcpu, 4);
944 unsigned long addr = kvmppc_get_gpr(vcpu, 5);
945 unsigned long val = kvmppc_get_gpr(vcpu, 6);
946 u64 buf;
947 int srcu_idx;
948 int ret;
949
950 switch (size) {
951 case 1:
952 *(u8 *)&buf = val;
953 break;
954
955 case 2:
956 *(__be16 *)&buf = cpu_to_be16(val);
957 break;
958
959 case 4:
960 *(__be32 *)&buf = cpu_to_be32(val);
961 break;
962
963 case 8:
964 *(__be64 *)&buf = cpu_to_be64(val);
965 break;
966
967 default:
968 return H_TOO_HARD;
969 }
970
971 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
972 ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf);
973 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
974 if (ret != 0)
975 return H_TOO_HARD;
976
977 return H_SUCCESS;
978 }
979 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store);
980
981 int kvmppc_core_check_processor_compat(void)
982 {
983 /*
984 * We always return 0 for book3s. We check
985 * for compatibility while loading the HV
986 * or PR module
987 */
988 return 0;
989 }
990
991 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
992 {
993 return kvm->arch.kvm_ops->hcall_implemented(hcall);
994 }
995
996 #ifdef CONFIG_KVM_XICS
997 int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level,
998 bool line_status)
999 {
1000 if (xics_on_xive())
1001 return kvmppc_xive_set_irq(kvm, irq_source_id, irq, level,
1002 line_status);
1003 else
1004 return kvmppc_xics_set_irq(kvm, irq_source_id, irq, level,
1005 line_status);
1006 }
1007
1008 int kvm_arch_set_irq_inatomic(struct kvm_kernel_irq_routing_entry *irq_entry,
1009 struct kvm *kvm, int irq_source_id,
1010 int level, bool line_status)
1011 {
1012 return kvm_set_irq(kvm, irq_source_id, irq_entry->gsi,
1013 level, line_status);
1014 }
1015 static int kvmppc_book3s_set_irq(struct kvm_kernel_irq_routing_entry *e,
1016 struct kvm *kvm, int irq_source_id, int level,
1017 bool line_status)
1018 {
1019 return kvm_set_irq(kvm, irq_source_id, e->gsi, level, line_status);
1020 }
1021
1022 int kvm_irq_map_gsi(struct kvm *kvm,
1023 struct kvm_kernel_irq_routing_entry *entries, int gsi)
1024 {
1025 entries->gsi = gsi;
1026 entries->type = KVM_IRQ_ROUTING_IRQCHIP;
1027 entries->set = kvmppc_book3s_set_irq;
1028 entries->irqchip.irqchip = 0;
1029 entries->irqchip.pin = gsi;
1030 return 1;
1031 }
1032
1033 int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin)
1034 {
1035 return pin;
1036 }
1037
1038 #endif /* CONFIG_KVM_XICS */
1039
1040 static int kvmppc_book3s_init(void)
1041 {
1042 int r;
1043
1044 r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
1045 if (r)
1046 return r;
1047 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1048 r = kvmppc_book3s_init_pr();
1049 #endif
1050
1051 #ifdef CONFIG_KVM_XICS
1052 #ifdef CONFIG_KVM_XIVE
1053 if (xics_on_xive()) {
1054 kvmppc_xive_init_module();
1055 kvm_register_device_ops(&kvm_xive_ops, KVM_DEV_TYPE_XICS);
1056 if (kvmppc_xive_native_supported()) {
1057 kvmppc_xive_native_init_module();
1058 kvm_register_device_ops(&kvm_xive_native_ops,
1059 KVM_DEV_TYPE_XIVE);
1060 }
1061 } else
1062 #endif
1063 kvm_register_device_ops(&kvm_xics_ops, KVM_DEV_TYPE_XICS);
1064 #endif
1065 return r;
1066 }
1067
1068 static void kvmppc_book3s_exit(void)
1069 {
1070 #ifdef CONFIG_KVM_XICS
1071 if (xics_on_xive()) {
1072 kvmppc_xive_exit_module();
1073 kvmppc_xive_native_exit_module();
1074 }
1075 #endif
1076 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1077 kvmppc_book3s_exit_pr();
1078 #endif
1079 kvm_exit();
1080 }
1081
1082 module_init(kvmppc_book3s_init);
1083 module_exit(kvmppc_book3s_exit);
1084
1085 /* On 32bit this is our one and only kernel module */
1086 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1087 MODULE_ALIAS_MISCDEV(KVM_MINOR);
1088 MODULE_ALIAS("devname:kvm");
1089 #endif
Linux with added FPC-III support