1 /*
2 * Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
3 *
4 * Authors:
5 * Alexander Graf <agraf@suse.de>
6 * Kevin Wolf <mail@kevin-wolf.de>
7 *
8 * Description:
9 * This file is derived from arch/powerpc/kvm/44x.c,
10 * by Hollis Blanchard <hollisb@us.ibm.com>.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License, version 2, as
14 * published by the Free Software Foundation.
15 */
16
17 #include <linux/kvm_host.h>
18 #include <linux/err.h>
19 #include <linux/export.h>
20 #include <linux/slab.h>
21 #include <linux/module.h>
22 #include <linux/miscdevice.h>
23
24 #include <asm/reg.h>
25 #include <asm/cputable.h>
26 #include <asm/cacheflush.h>
27 #include <asm/tlbflush.h>
28 #include <asm/uaccess.h>
29 #include <asm/io.h>
30 #include <asm/kvm_ppc.h>
31 #include <asm/kvm_book3s.h>
32 #include <asm/mmu_context.h>
33 #include <asm/page.h>
34 #include <linux/gfp.h>
35 #include <linux/sched.h>
36 #include <linux/vmalloc.h>
37 #include <linux/highmem.h>
38
39 #include "book3s.h"
40 #include "trace.h"
41
42 #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
43
44 /* #define EXIT_DEBUG */
45
46 struct kvm_stats_debugfs_item debugfs_entries[] = {
47 { "exits", VCPU_STAT(sum_exits) },
48 { "mmio", VCPU_STAT(mmio_exits) },
49 { "sig", VCPU_STAT(signal_exits) },
50 { "sysc", VCPU_STAT(syscall_exits) },
51 { "inst_emu", VCPU_STAT(emulated_inst_exits) },
52 { "dec", VCPU_STAT(dec_exits) },
53 { "ext_intr", VCPU_STAT(ext_intr_exits) },
54 { "queue_intr", VCPU_STAT(queue_intr) },
55 { "halt_successful_poll", VCPU_STAT(halt_successful_poll), },
56 { "halt_attempted_poll", VCPU_STAT(halt_attempted_poll), },
57 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
58 { "pf_storage", VCPU_STAT(pf_storage) },
59 { "sp_storage", VCPU_STAT(sp_storage) },
60 { "pf_instruc", VCPU_STAT(pf_instruc) },
61 { "sp_instruc", VCPU_STAT(sp_instruc) },
62 { "ld", VCPU_STAT(ld) },
63 { "ld_slow", VCPU_STAT(ld_slow) },
64 { "st", VCPU_STAT(st) },
65 { "st_slow", VCPU_STAT(st_slow) },
66 { NULL }
67 };
68
kvmppc_unfixup_split_real(struct kvm_vcpu * vcpu)69 void kvmppc_unfixup_split_real(struct kvm_vcpu *vcpu)
70 {
71 if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) {
72 ulong pc = kvmppc_get_pc(vcpu);
73 ulong lr = kvmppc_get_lr(vcpu);
74 if ((pc & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS)
75 kvmppc_set_pc(vcpu, pc & ~SPLIT_HACK_MASK);
76 if ((lr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS)
77 kvmppc_set_lr(vcpu, lr & ~SPLIT_HACK_MASK);
78 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SPLIT_HACK;
79 }
80 }
81 EXPORT_SYMBOL_GPL(kvmppc_unfixup_split_real);
82
kvmppc_interrupt_offset(struct kvm_vcpu * vcpu)83 static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
84 {
85 if (!is_kvmppc_hv_enabled(vcpu->kvm))
86 return to_book3s(vcpu)->hior;
87 return 0;
88 }
89
kvmppc_update_int_pending(struct kvm_vcpu * vcpu,unsigned long pending_now,unsigned long old_pending)90 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
91 unsigned long pending_now, unsigned long old_pending)
92 {
93 if (is_kvmppc_hv_enabled(vcpu->kvm))
94 return;
95 if (pending_now)
96 kvmppc_set_int_pending(vcpu, 1);
97 else if (old_pending)
98 kvmppc_set_int_pending(vcpu, 0);
99 }
100
kvmppc_critical_section(struct kvm_vcpu * vcpu)101 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
102 {
103 ulong crit_raw;
104 ulong crit_r1;
105 bool crit;
106
107 if (is_kvmppc_hv_enabled(vcpu->kvm))
108 return false;
109
110 crit_raw = kvmppc_get_critical(vcpu);
111 crit_r1 = kvmppc_get_gpr(vcpu, 1);
112
113 /* Truncate crit indicators in 32 bit mode */
114 if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
115 crit_raw &= 0xffffffff;
116 crit_r1 &= 0xffffffff;
117 }
118
119 /* Critical section when crit == r1 */
120 crit = (crit_raw == crit_r1);
121 /* ... and we're in supervisor mode */
122 crit = crit && !(kvmppc_get_msr(vcpu) & MSR_PR);
123
124 return crit;
125 }
126
kvmppc_inject_interrupt(struct kvm_vcpu * vcpu,int vec,u64 flags)127 void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
128 {
129 kvmppc_unfixup_split_real(vcpu);
130 kvmppc_set_srr0(vcpu, kvmppc_get_pc(vcpu));
131 kvmppc_set_srr1(vcpu, kvmppc_get_msr(vcpu) | flags);
132 kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
133 vcpu->arch.mmu.reset_msr(vcpu);
134 }
135
kvmppc_book3s_vec2irqprio(unsigned int vec)136 static int kvmppc_book3s_vec2irqprio(unsigned int vec)
137 {
138 unsigned int prio;
139
140 switch (vec) {
141 case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break;
142 case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break;
143 case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break;
144 case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break;
145 case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break;
146 case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break;
147 case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break;
148 case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL; break;
149 case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break;
150 case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break;
151 case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break;
152 case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break;
153 case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break;
154 case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break;
155 case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break;
156 case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break;
157 case 0xf60: prio = BOOK3S_IRQPRIO_FAC_UNAVAIL; break;
158 default: prio = BOOK3S_IRQPRIO_MAX; break;
159 }
160
161 return prio;
162 }
163
kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu * vcpu,unsigned int vec)164 void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
165 unsigned int vec)
166 {
167 unsigned long old_pending = vcpu->arch.pending_exceptions;
168
169 clear_bit(kvmppc_book3s_vec2irqprio(vec),
170 &vcpu->arch.pending_exceptions);
171
172 kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
173 old_pending);
174 }
175
kvmppc_book3s_queue_irqprio(struct kvm_vcpu * vcpu,unsigned int vec)176 void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
177 {
178 vcpu->stat.queue_intr++;
179
180 set_bit(kvmppc_book3s_vec2irqprio(vec),
181 &vcpu->arch.pending_exceptions);
182 #ifdef EXIT_DEBUG
183 printk(KERN_INFO "Queueing interrupt %x\n", vec);
184 #endif
185 }
186 EXPORT_SYMBOL_GPL(kvmppc_book3s_queue_irqprio);
187
kvmppc_core_queue_program(struct kvm_vcpu * vcpu,ulong flags)188 void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
189 {
190 /* might as well deliver this straight away */
191 kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
192 }
193 EXPORT_SYMBOL_GPL(kvmppc_core_queue_program);
194
kvmppc_core_queue_dec(struct kvm_vcpu * vcpu)195 void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
196 {
197 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
198 }
199 EXPORT_SYMBOL_GPL(kvmppc_core_queue_dec);
200
kvmppc_core_pending_dec(struct kvm_vcpu * vcpu)201 int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
202 {
203 return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
204 }
205 EXPORT_SYMBOL_GPL(kvmppc_core_pending_dec);
206
kvmppc_core_dequeue_dec(struct kvm_vcpu * vcpu)207 void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
208 {
209 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
210 }
211 EXPORT_SYMBOL_GPL(kvmppc_core_dequeue_dec);
212
kvmppc_core_queue_external(struct kvm_vcpu * vcpu,struct kvm_interrupt * irq)213 void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
214 struct kvm_interrupt *irq)
215 {
216 unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
217
218 if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
219 vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
220
221 kvmppc_book3s_queue_irqprio(vcpu, vec);
222 }
223
kvmppc_core_dequeue_external(struct kvm_vcpu * vcpu)224 void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu)
225 {
226 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
227 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
228 }
229
kvmppc_core_queue_data_storage(struct kvm_vcpu * vcpu,ulong dar,ulong flags)230 void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu, ulong dar,
231 ulong flags)
232 {
233 kvmppc_set_dar(vcpu, dar);
234 kvmppc_set_dsisr(vcpu, flags);
235 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DATA_STORAGE);
236 }
237
kvmppc_core_queue_inst_storage(struct kvm_vcpu * vcpu,ulong flags)238 void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu, ulong flags)
239 {
240 u64 msr = kvmppc_get_msr(vcpu);
241 msr &= ~(SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
242 msr |= flags & (SRR1_ISI_NOPT | SRR1_ISI_N_OR_G | SRR1_ISI_PROT);
243 kvmppc_set_msr_fast(vcpu, msr);
244 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
245 }
246
kvmppc_book3s_irqprio_deliver(struct kvm_vcpu * vcpu,unsigned int priority)247 static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu,
248 unsigned int priority)
249 {
250 int deliver = 1;
251 int vec = 0;
252 bool crit = kvmppc_critical_section(vcpu);
253
254 switch (priority) {
255 case BOOK3S_IRQPRIO_DECREMENTER:
256 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
257 vec = BOOK3S_INTERRUPT_DECREMENTER;
258 break;
259 case BOOK3S_IRQPRIO_EXTERNAL:
260 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
261 deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
262 vec = BOOK3S_INTERRUPT_EXTERNAL;
263 break;
264 case BOOK3S_IRQPRIO_SYSTEM_RESET:
265 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
266 break;
267 case BOOK3S_IRQPRIO_MACHINE_CHECK:
268 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
269 break;
270 case BOOK3S_IRQPRIO_DATA_STORAGE:
271 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
272 break;
273 case BOOK3S_IRQPRIO_INST_STORAGE:
274 vec = BOOK3S_INTERRUPT_INST_STORAGE;
275 break;
276 case BOOK3S_IRQPRIO_DATA_SEGMENT:
277 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
278 break;
279 case BOOK3S_IRQPRIO_INST_SEGMENT:
280 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
281 break;
282 case BOOK3S_IRQPRIO_ALIGNMENT:
283 vec = BOOK3S_INTERRUPT_ALIGNMENT;
284 break;
285 case BOOK3S_IRQPRIO_PROGRAM:
286 vec = BOOK3S_INTERRUPT_PROGRAM;
287 break;
288 case BOOK3S_IRQPRIO_VSX:
289 vec = BOOK3S_INTERRUPT_VSX;
290 break;
291 case BOOK3S_IRQPRIO_ALTIVEC:
292 vec = BOOK3S_INTERRUPT_ALTIVEC;
293 break;
294 case BOOK3S_IRQPRIO_FP_UNAVAIL:
295 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
296 break;
297 case BOOK3S_IRQPRIO_SYSCALL:
298 vec = BOOK3S_INTERRUPT_SYSCALL;
299 break;
300 case BOOK3S_IRQPRIO_DEBUG:
301 vec = BOOK3S_INTERRUPT_TRACE;
302 break;
303 case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
304 vec = BOOK3S_INTERRUPT_PERFMON;
305 break;
306 case BOOK3S_IRQPRIO_FAC_UNAVAIL:
307 vec = BOOK3S_INTERRUPT_FAC_UNAVAIL;
308 break;
309 default:
310 deliver = 0;
311 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
312 break;
313 }
314
315 #if 0
316 printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
317 #endif
318
319 if (deliver)
320 kvmppc_inject_interrupt(vcpu, vec, 0);
321
322 return deliver;
323 }
324
325 /*
326 * This function determines if an irqprio should be cleared once issued.
327 */
clear_irqprio(struct kvm_vcpu * vcpu,unsigned int priority)328 static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
329 {
330 switch (priority) {
331 case BOOK3S_IRQPRIO_DECREMENTER:
332 /* DEC interrupts get cleared by mtdec */
333 return false;
334 case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
335 /* External interrupts get cleared by userspace */
336 return false;
337 }
338
339 return true;
340 }
341
kvmppc_core_prepare_to_enter(struct kvm_vcpu * vcpu)342 int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
343 {
344 unsigned long *pending = &vcpu->arch.pending_exceptions;
345 unsigned long old_pending = vcpu->arch.pending_exceptions;
346 unsigned int priority;
347
348 #ifdef EXIT_DEBUG
349 if (vcpu->arch.pending_exceptions)
350 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
351 #endif
352 priority = __ffs(*pending);
353 while (priority < BOOK3S_IRQPRIO_MAX) {
354 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
355 clear_irqprio(vcpu, priority)) {
356 clear_bit(priority, &vcpu->arch.pending_exceptions);
357 break;
358 }
359
360 priority = find_next_bit(pending,
361 BITS_PER_BYTE * sizeof(*pending),
362 priority + 1);
363 }
364
365 /* Tell the guest about our interrupt status */
366 kvmppc_update_int_pending(vcpu, *pending, old_pending);
367
368 return 0;
369 }
370 EXPORT_SYMBOL_GPL(kvmppc_core_prepare_to_enter);
371
kvmppc_gpa_to_pfn(struct kvm_vcpu * vcpu,gpa_t gpa,bool writing,bool * writable)372 pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
373 bool *writable)
374 {
375 ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM;
376 gfn_t gfn = gpa >> PAGE_SHIFT;
377
378 if (!(kvmppc_get_msr(vcpu) & MSR_SF))
379 mp_pa = (uint32_t)mp_pa;
380
381 /* Magic page override */
382 gpa &= ~0xFFFULL;
383 if (unlikely(mp_pa) && unlikely((gpa & KVM_PAM) == mp_pa)) {
384 ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
385 pfn_t pfn;
386
387 pfn = (pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
388 get_page(pfn_to_page(pfn));
389 if (writable)
390 *writable = true;
391 return pfn;
392 }
393
394 return gfn_to_pfn_prot(vcpu->kvm, gfn, writing, writable);
395 }
396 EXPORT_SYMBOL_GPL(kvmppc_gpa_to_pfn);
397
kvmppc_xlate(struct kvm_vcpu * vcpu,ulong eaddr,enum xlate_instdata xlid,enum xlate_readwrite xlrw,struct kvmppc_pte * pte)398 int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, enum xlate_instdata xlid,
399 enum xlate_readwrite xlrw, struct kvmppc_pte *pte)
400 {
401 bool data = (xlid == XLATE_DATA);
402 bool iswrite = (xlrw == XLATE_WRITE);
403 int relocated = (kvmppc_get_msr(vcpu) & (data ? MSR_DR : MSR_IR));
404 int r;
405
406 if (relocated) {
407 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data, iswrite);
408 } else {
409 pte->eaddr = eaddr;
410 pte->raddr = eaddr & KVM_PAM;
411 pte->vpage = VSID_REAL | eaddr >> 12;
412 pte->may_read = true;
413 pte->may_write = true;
414 pte->may_execute = true;
415 r = 0;
416
417 if ((kvmppc_get_msr(vcpu) & (MSR_IR | MSR_DR)) == MSR_DR &&
418 !data) {
419 if ((vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
420 ((eaddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
421 pte->raddr &= ~SPLIT_HACK_MASK;
422 }
423 }
424
425 return r;
426 }
427
kvmppc_load_last_inst(struct kvm_vcpu * vcpu,enum instruction_type type,u32 * inst)428 int kvmppc_load_last_inst(struct kvm_vcpu *vcpu, enum instruction_type type,
429 u32 *inst)
430 {
431 ulong pc = kvmppc_get_pc(vcpu);
432 int r;
433
434 if (type == INST_SC)
435 pc -= 4;
436
437 r = kvmppc_ld(vcpu, &pc, sizeof(u32), inst, false);
438 if (r == EMULATE_DONE)
439 return r;
440 else
441 return EMULATE_AGAIN;
442 }
443 EXPORT_SYMBOL_GPL(kvmppc_load_last_inst);
444
kvm_arch_vcpu_setup(struct kvm_vcpu * vcpu)445 int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
446 {
447 return 0;
448 }
449
kvmppc_subarch_vcpu_init(struct kvm_vcpu * vcpu)450 int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
451 {
452 return 0;
453 }
454
kvmppc_subarch_vcpu_uninit(struct kvm_vcpu * vcpu)455 void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
456 {
457 }
458
kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu * vcpu,struct kvm_sregs * sregs)459 int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
460 struct kvm_sregs *sregs)
461 {
462 return vcpu->kvm->arch.kvm_ops->get_sregs(vcpu, sregs);
463 }
464
kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu * vcpu,struct kvm_sregs * sregs)465 int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
466 struct kvm_sregs *sregs)
467 {
468 return vcpu->kvm->arch.kvm_ops->set_sregs(vcpu, sregs);
469 }
470
kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu * vcpu,struct kvm_regs * regs)471 int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
472 {
473 int i;
474
475 regs->pc = kvmppc_get_pc(vcpu);
476 regs->cr = kvmppc_get_cr(vcpu);
477 regs->ctr = kvmppc_get_ctr(vcpu);
478 regs->lr = kvmppc_get_lr(vcpu);
479 regs->xer = kvmppc_get_xer(vcpu);
480 regs->msr = kvmppc_get_msr(vcpu);
481 regs->srr0 = kvmppc_get_srr0(vcpu);
482 regs->srr1 = kvmppc_get_srr1(vcpu);
483 regs->pid = vcpu->arch.pid;
484 regs->sprg0 = kvmppc_get_sprg0(vcpu);
485 regs->sprg1 = kvmppc_get_sprg1(vcpu);
486 regs->sprg2 = kvmppc_get_sprg2(vcpu);
487 regs->sprg3 = kvmppc_get_sprg3(vcpu);
488 regs->sprg4 = kvmppc_get_sprg4(vcpu);
489 regs->sprg5 = kvmppc_get_sprg5(vcpu);
490 regs->sprg6 = kvmppc_get_sprg6(vcpu);
491 regs->sprg7 = kvmppc_get_sprg7(vcpu);
492
493 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
494 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
495
496 return 0;
497 }
498
kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu * vcpu,struct kvm_regs * regs)499 int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
500 {
501 int i;
502
503 kvmppc_set_pc(vcpu, regs->pc);
504 kvmppc_set_cr(vcpu, regs->cr);
505 kvmppc_set_ctr(vcpu, regs->ctr);
506 kvmppc_set_lr(vcpu, regs->lr);
507 kvmppc_set_xer(vcpu, regs->xer);
508 kvmppc_set_msr(vcpu, regs->msr);
509 kvmppc_set_srr0(vcpu, regs->srr0);
510 kvmppc_set_srr1(vcpu, regs->srr1);
511 kvmppc_set_sprg0(vcpu, regs->sprg0);
512 kvmppc_set_sprg1(vcpu, regs->sprg1);
513 kvmppc_set_sprg2(vcpu, regs->sprg2);
514 kvmppc_set_sprg3(vcpu, regs->sprg3);
515 kvmppc_set_sprg4(vcpu, regs->sprg4);
516 kvmppc_set_sprg5(vcpu, regs->sprg5);
517 kvmppc_set_sprg6(vcpu, regs->sprg6);
518 kvmppc_set_sprg7(vcpu, regs->sprg7);
519
520 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
521 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
522
523 return 0;
524 }
525
kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu * vcpu,struct kvm_fpu * fpu)526 int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
527 {
528 return -ENOTSUPP;
529 }
530
kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu * vcpu,struct kvm_fpu * fpu)531 int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
532 {
533 return -ENOTSUPP;
534 }
535
kvmppc_get_one_reg(struct kvm_vcpu * vcpu,u64 id,union kvmppc_one_reg * val)536 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id,
537 union kvmppc_one_reg *val)
538 {
539 int r = 0;
540 long int i;
541
542 r = vcpu->kvm->arch.kvm_ops->get_one_reg(vcpu, id, val);
543 if (r == -EINVAL) {
544 r = 0;
545 switch (id) {
546 case KVM_REG_PPC_DAR:
547 *val = get_reg_val(id, kvmppc_get_dar(vcpu));
548 break;
549 case KVM_REG_PPC_DSISR:
550 *val = get_reg_val(id, kvmppc_get_dsisr(vcpu));
551 break;
552 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
553 i = id - KVM_REG_PPC_FPR0;
554 *val = get_reg_val(id, VCPU_FPR(vcpu, i));
555 break;
556 case KVM_REG_PPC_FPSCR:
557 *val = get_reg_val(id, vcpu->arch.fp.fpscr);
558 break;
559 #ifdef CONFIG_VSX
560 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
561 if (cpu_has_feature(CPU_FTR_VSX)) {
562 i = id - KVM_REG_PPC_VSR0;
563 val->vsxval[0] = vcpu->arch.fp.fpr[i][0];
564 val->vsxval[1] = vcpu->arch.fp.fpr[i][1];
565 } else {
566 r = -ENXIO;
567 }
568 break;
569 #endif /* CONFIG_VSX */
570 case KVM_REG_PPC_DEBUG_INST:
571 *val = get_reg_val(id, INS_TW);
572 break;
573 #ifdef CONFIG_KVM_XICS
574 case KVM_REG_PPC_ICP_STATE:
575 if (!vcpu->arch.icp) {
576 r = -ENXIO;
577 break;
578 }
579 *val = get_reg_val(id, kvmppc_xics_get_icp(vcpu));
580 break;
581 #endif /* CONFIG_KVM_XICS */
582 case KVM_REG_PPC_FSCR:
583 *val = get_reg_val(id, vcpu->arch.fscr);
584 break;
585 case KVM_REG_PPC_TAR:
586 *val = get_reg_val(id, vcpu->arch.tar);
587 break;
588 case KVM_REG_PPC_EBBHR:
589 *val = get_reg_val(id, vcpu->arch.ebbhr);
590 break;
591 case KVM_REG_PPC_EBBRR:
592 *val = get_reg_val(id, vcpu->arch.ebbrr);
593 break;
594 case KVM_REG_PPC_BESCR:
595 *val = get_reg_val(id, vcpu->arch.bescr);
596 break;
597 case KVM_REG_PPC_VTB:
598 *val = get_reg_val(id, vcpu->arch.vtb);
599 break;
600 case KVM_REG_PPC_IC:
601 *val = get_reg_val(id, vcpu->arch.ic);
602 break;
603 default:
604 r = -EINVAL;
605 break;
606 }
607 }
608
609 return r;
610 }
611
kvmppc_set_one_reg(struct kvm_vcpu * vcpu,u64 id,union kvmppc_one_reg * val)612 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id,
613 union kvmppc_one_reg *val)
614 {
615 int r = 0;
616 long int i;
617
618 r = vcpu->kvm->arch.kvm_ops->set_one_reg(vcpu, id, val);
619 if (r == -EINVAL) {
620 r = 0;
621 switch (id) {
622 case KVM_REG_PPC_DAR:
623 kvmppc_set_dar(vcpu, set_reg_val(id, *val));
624 break;
625 case KVM_REG_PPC_DSISR:
626 kvmppc_set_dsisr(vcpu, set_reg_val(id, *val));
627 break;
628 case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
629 i = id - KVM_REG_PPC_FPR0;
630 VCPU_FPR(vcpu, i) = set_reg_val(id, *val);
631 break;
632 case KVM_REG_PPC_FPSCR:
633 vcpu->arch.fp.fpscr = set_reg_val(id, *val);
634 break;
635 #ifdef CONFIG_VSX
636 case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
637 if (cpu_has_feature(CPU_FTR_VSX)) {
638 i = id - KVM_REG_PPC_VSR0;
639 vcpu->arch.fp.fpr[i][0] = val->vsxval[0];
640 vcpu->arch.fp.fpr[i][1] = val->vsxval[1];
641 } else {
642 r = -ENXIO;
643 }
644 break;
645 #endif /* CONFIG_VSX */
646 #ifdef CONFIG_KVM_XICS
647 case KVM_REG_PPC_ICP_STATE:
648 if (!vcpu->arch.icp) {
649 r = -ENXIO;
650 break;
651 }
652 r = kvmppc_xics_set_icp(vcpu,
653 set_reg_val(id, *val));
654 break;
655 #endif /* CONFIG_KVM_XICS */
656 case KVM_REG_PPC_FSCR:
657 vcpu->arch.fscr = set_reg_val(id, *val);
658 break;
659 case KVM_REG_PPC_TAR:
660 vcpu->arch.tar = set_reg_val(id, *val);
661 break;
662 case KVM_REG_PPC_EBBHR:
663 vcpu->arch.ebbhr = set_reg_val(id, *val);
664 break;
665 case KVM_REG_PPC_EBBRR:
666 vcpu->arch.ebbrr = set_reg_val(id, *val);
667 break;
668 case KVM_REG_PPC_BESCR:
669 vcpu->arch.bescr = set_reg_val(id, *val);
670 break;
671 case KVM_REG_PPC_VTB:
672 vcpu->arch.vtb = set_reg_val(id, *val);
673 break;
674 case KVM_REG_PPC_IC:
675 vcpu->arch.ic = set_reg_val(id, *val);
676 break;
677 default:
678 r = -EINVAL;
679 break;
680 }
681 }
682
683 return r;
684 }
685
kvmppc_core_vcpu_load(struct kvm_vcpu * vcpu,int cpu)686 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
687 {
688 vcpu->kvm->arch.kvm_ops->vcpu_load(vcpu, cpu);
689 }
690
kvmppc_core_vcpu_put(struct kvm_vcpu * vcpu)691 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
692 {
693 vcpu->kvm->arch.kvm_ops->vcpu_put(vcpu);
694 }
695
kvmppc_set_msr(struct kvm_vcpu * vcpu,u64 msr)696 void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
697 {
698 vcpu->kvm->arch.kvm_ops->set_msr(vcpu, msr);
699 }
700 EXPORT_SYMBOL_GPL(kvmppc_set_msr);
701
kvmppc_vcpu_run(struct kvm_run * kvm_run,struct kvm_vcpu * vcpu)702 int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
703 {
704 return vcpu->kvm->arch.kvm_ops->vcpu_run(kvm_run, vcpu);
705 }
706
kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu * vcpu,struct kvm_translation * tr)707 int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
708 struct kvm_translation *tr)
709 {
710 return 0;
711 }
712
kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu * vcpu,struct kvm_guest_debug * dbg)713 int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
714 struct kvm_guest_debug *dbg)
715 {
716 vcpu->guest_debug = dbg->control;
717 return 0;
718 }
719
kvmppc_decrementer_func(struct kvm_vcpu * vcpu)720 void kvmppc_decrementer_func(struct kvm_vcpu *vcpu)
721 {
722 kvmppc_core_queue_dec(vcpu);
723 kvm_vcpu_kick(vcpu);
724 }
725
kvmppc_core_vcpu_create(struct kvm * kvm,unsigned int id)726 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
727 {
728 return kvm->arch.kvm_ops->vcpu_create(kvm, id);
729 }
730
kvmppc_core_vcpu_free(struct kvm_vcpu * vcpu)731 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
732 {
733 vcpu->kvm->arch.kvm_ops->vcpu_free(vcpu);
734 }
735
kvmppc_core_check_requests(struct kvm_vcpu * vcpu)736 int kvmppc_core_check_requests(struct kvm_vcpu *vcpu)
737 {
738 return vcpu->kvm->arch.kvm_ops->check_requests(vcpu);
739 }
740
kvm_vm_ioctl_get_dirty_log(struct kvm * kvm,struct kvm_dirty_log * log)741 int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
742 {
743 return kvm->arch.kvm_ops->get_dirty_log(kvm, log);
744 }
745
kvmppc_core_free_memslot(struct kvm * kvm,struct kvm_memory_slot * free,struct kvm_memory_slot * dont)746 void kvmppc_core_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
747 struct kvm_memory_slot *dont)
748 {
749 kvm->arch.kvm_ops->free_memslot(free, dont);
750 }
751
kvmppc_core_create_memslot(struct kvm * kvm,struct kvm_memory_slot * slot,unsigned long npages)752 int kvmppc_core_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
753 unsigned long npages)
754 {
755 return kvm->arch.kvm_ops->create_memslot(slot, npages);
756 }
757
kvmppc_core_flush_memslot(struct kvm * kvm,struct kvm_memory_slot * memslot)758 void kvmppc_core_flush_memslot(struct kvm *kvm, struct kvm_memory_slot *memslot)
759 {
760 kvm->arch.kvm_ops->flush_memslot(kvm, memslot);
761 }
762
kvmppc_core_prepare_memory_region(struct kvm * kvm,struct kvm_memory_slot * memslot,const struct kvm_userspace_memory_region * mem)763 int kvmppc_core_prepare_memory_region(struct kvm *kvm,
764 struct kvm_memory_slot *memslot,
765 const struct kvm_userspace_memory_region *mem)
766 {
767 return kvm->arch.kvm_ops->prepare_memory_region(kvm, memslot, mem);
768 }
769
kvmppc_core_commit_memory_region(struct kvm * kvm,const struct kvm_userspace_memory_region * mem,const struct kvm_memory_slot * old,const struct kvm_memory_slot * new)770 void kvmppc_core_commit_memory_region(struct kvm *kvm,
771 const struct kvm_userspace_memory_region *mem,
772 const struct kvm_memory_slot *old,
773 const struct kvm_memory_slot *new)
774 {
775 kvm->arch.kvm_ops->commit_memory_region(kvm, mem, old, new);
776 }
777
kvm_unmap_hva(struct kvm * kvm,unsigned long hva)778 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva)
779 {
780 return kvm->arch.kvm_ops->unmap_hva(kvm, hva);
781 }
782 EXPORT_SYMBOL_GPL(kvm_unmap_hva);
783
kvm_unmap_hva_range(struct kvm * kvm,unsigned long start,unsigned long end)784 int kvm_unmap_hva_range(struct kvm *kvm, unsigned long start, unsigned long end)
785 {
786 return kvm->arch.kvm_ops->unmap_hva_range(kvm, start, end);
787 }
788
kvm_age_hva(struct kvm * kvm,unsigned long start,unsigned long end)789 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
790 {
791 return kvm->arch.kvm_ops->age_hva(kvm, start, end);
792 }
793
kvm_test_age_hva(struct kvm * kvm,unsigned long hva)794 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
795 {
796 return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
797 }
798
kvm_set_spte_hva(struct kvm * kvm,unsigned long hva,pte_t pte)799 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
800 {
801 kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
802 }
803
kvmppc_mmu_destroy(struct kvm_vcpu * vcpu)804 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
805 {
806 vcpu->kvm->arch.kvm_ops->mmu_destroy(vcpu);
807 }
808
kvmppc_core_init_vm(struct kvm * kvm)809 int kvmppc_core_init_vm(struct kvm *kvm)
810 {
811
812 #ifdef CONFIG_PPC64
813 INIT_LIST_HEAD(&kvm->arch.spapr_tce_tables);
814 INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
815 mutex_init(&kvm->arch.rtas_token_lock);
816 #endif
817
818 return kvm->arch.kvm_ops->init_vm(kvm);
819 }
820
kvmppc_core_destroy_vm(struct kvm * kvm)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
kvmppc_h_logical_ci_load(struct kvm_vcpu * vcpu)831 int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu)
832 {
833 unsigned long size = kvmppc_get_gpr(vcpu, 4);
834 unsigned long addr = kvmppc_get_gpr(vcpu, 5);
835 u64 buf;
836 int srcu_idx;
837 int ret;
838
839 if (!is_power_of_2(size) || (size > sizeof(buf)))
840 return H_TOO_HARD;
841
842 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
843 ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, addr, size, &buf);
844 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
845 if (ret != 0)
846 return H_TOO_HARD;
847
848 switch (size) {
849 case 1:
850 kvmppc_set_gpr(vcpu, 4, *(u8 *)&buf);
851 break;
852
853 case 2:
854 kvmppc_set_gpr(vcpu, 4, be16_to_cpu(*(__be16 *)&buf));
855 break;
856
857 case 4:
858 kvmppc_set_gpr(vcpu, 4, be32_to_cpu(*(__be32 *)&buf));
859 break;
860
861 case 8:
862 kvmppc_set_gpr(vcpu, 4, be64_to_cpu(*(__be64 *)&buf));
863 break;
864
865 default:
866 BUG();
867 }
868
869 return H_SUCCESS;
870 }
871 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_load);
872
kvmppc_h_logical_ci_store(struct kvm_vcpu * vcpu)873 int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu)
874 {
875 unsigned long size = kvmppc_get_gpr(vcpu, 4);
876 unsigned long addr = kvmppc_get_gpr(vcpu, 5);
877 unsigned long val = kvmppc_get_gpr(vcpu, 6);
878 u64 buf;
879 int srcu_idx;
880 int ret;
881
882 switch (size) {
883 case 1:
884 *(u8 *)&buf = val;
885 break;
886
887 case 2:
888 *(__be16 *)&buf = cpu_to_be16(val);
889 break;
890
891 case 4:
892 *(__be32 *)&buf = cpu_to_be32(val);
893 break;
894
895 case 8:
896 *(__be64 *)&buf = cpu_to_be64(val);
897 break;
898
899 default:
900 return H_TOO_HARD;
901 }
902
903 srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
904 ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, addr, size, &buf);
905 srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
906 if (ret != 0)
907 return H_TOO_HARD;
908
909 return H_SUCCESS;
910 }
911 EXPORT_SYMBOL_GPL(kvmppc_h_logical_ci_store);
912
kvmppc_core_check_processor_compat(void)913 int kvmppc_core_check_processor_compat(void)
914 {
915 /*
916 * We always return 0 for book3s. We check
917 * for compatibility while loading the HV
918 * or PR module
919 */
920 return 0;
921 }
922
kvmppc_book3s_hcall_implemented(struct kvm * kvm,unsigned long hcall)923 int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hcall)
924 {
925 return kvm->arch.kvm_ops->hcall_implemented(hcall);
926 }
927
kvmppc_book3s_init(void)928 static int kvmppc_book3s_init(void)
929 {
930 int r;
931
932 r = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE);
933 if (r)
934 return r;
935 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
936 r = kvmppc_book3s_init_pr();
937 #endif
938 return r;
939
940 }
941
kvmppc_book3s_exit(void)942 static void kvmppc_book3s_exit(void)
943 {
944 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
945 kvmppc_book3s_exit_pr();
946 #endif
947 kvm_exit();
948 }
949
950 module_init(kvmppc_book3s_init);
951 module_exit(kvmppc_book3s_exit);
952
953 /* On 32bit this is our one and only kernel module */
954 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
955 MODULE_ALIAS_MISCDEV(KVM_MINOR);
956 MODULE_ALIAS("devname:kvm");
957 #endif
958