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