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-rw-r--r--arch/powerpc/kvm/book3s.c974
1 files changed, 974 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
new file mode 100644
index 000000000000..3e294bd9b8c6
--- /dev/null
+++ b/arch/powerpc/kvm/book3s.c
@@ -0,0 +1,974 @@
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
20#include <asm/reg.h>
21#include <asm/cputable.h>
22#include <asm/cacheflush.h>
23#include <asm/tlbflush.h>
24#include <asm/uaccess.h>
25#include <asm/io.h>
26#include <asm/kvm_ppc.h>
27#include <asm/kvm_book3s.h>
28#include <asm/mmu_context.h>
29#include <linux/sched.h>
30#include <linux/vmalloc.h>
31
32#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
33
34/* #define EXIT_DEBUG */
35/* #define EXIT_DEBUG_SIMPLE */
36
37/* Without AGGRESSIVE_DEC we only fire off a DEC interrupt when DEC turns 0.
38 * When set, we retrigger a DEC interrupt after that if DEC <= 0.
39 * PPC32 Linux runs faster without AGGRESSIVE_DEC, PPC64 Linux requires it. */
40
41/* #define AGGRESSIVE_DEC */
42
43struct kvm_stats_debugfs_item debugfs_entries[] = {
44 { "exits", VCPU_STAT(sum_exits) },
45 { "mmio", VCPU_STAT(mmio_exits) },
46 { "sig", VCPU_STAT(signal_exits) },
47 { "sysc", VCPU_STAT(syscall_exits) },
48 { "inst_emu", VCPU_STAT(emulated_inst_exits) },
49 { "dec", VCPU_STAT(dec_exits) },
50 { "ext_intr", VCPU_STAT(ext_intr_exits) },
51 { "queue_intr", VCPU_STAT(queue_intr) },
52 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
53 { "pf_storage", VCPU_STAT(pf_storage) },
54 { "sp_storage", VCPU_STAT(sp_storage) },
55 { "pf_instruc", VCPU_STAT(pf_instruc) },
56 { "sp_instruc", VCPU_STAT(sp_instruc) },
57 { "ld", VCPU_STAT(ld) },
58 { "ld_slow", VCPU_STAT(ld_slow) },
59 { "st", VCPU_STAT(st) },
60 { "st_slow", VCPU_STAT(st_slow) },
61 { NULL }
62};
63
64void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
65{
66}
67
68void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
69{
70}
71
72void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
73{
74 memcpy(get_paca()->kvm_slb, to_book3s(vcpu)->slb_shadow, sizeof(get_paca()->kvm_slb));
75 get_paca()->kvm_slb_max = to_book3s(vcpu)->slb_shadow_max;
76}
77
78void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
79{
80 memcpy(to_book3s(vcpu)->slb_shadow, get_paca()->kvm_slb, sizeof(get_paca()->kvm_slb));
81 to_book3s(vcpu)->slb_shadow_max = get_paca()->kvm_slb_max;
82}
83
84#if defined(AGGRESSIVE_DEC) || defined(EXIT_DEBUG)
85static u32 kvmppc_get_dec(struct kvm_vcpu *vcpu)
86{
87 u64 jd = mftb() - vcpu->arch.dec_jiffies;
88 return vcpu->arch.dec - jd;
89}
90#endif
91
92void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
93{
94 ulong old_msr = vcpu->arch.msr;
95
96#ifdef EXIT_DEBUG
97 printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr);
98#endif
99 msr &= to_book3s(vcpu)->msr_mask;
100 vcpu->arch.msr = msr;
101 vcpu->arch.shadow_msr = msr | MSR_USER32;
102 vcpu->arch.shadow_msr &= ( MSR_VEC | MSR_VSX | MSR_FP | MSR_FE0 |
103 MSR_USER64 | MSR_SE | MSR_BE | MSR_DE |
104 MSR_FE1);
105
106 if (msr & (MSR_WE|MSR_POW)) {
107 if (!vcpu->arch.pending_exceptions) {
108 kvm_vcpu_block(vcpu);
109 vcpu->stat.halt_wakeup++;
110 }
111 }
112
113 if (((vcpu->arch.msr & (MSR_IR|MSR_DR)) != (old_msr & (MSR_IR|MSR_DR))) ||
114 (vcpu->arch.msr & MSR_PR) != (old_msr & MSR_PR)) {
115 kvmppc_mmu_flush_segments(vcpu);
116 kvmppc_mmu_map_segment(vcpu, vcpu->arch.pc);
117 }
118}
119
120void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
121{
122 vcpu->arch.srr0 = vcpu->arch.pc;
123 vcpu->arch.srr1 = vcpu->arch.msr | flags;
124 vcpu->arch.pc = to_book3s(vcpu)->hior + vec;
125 vcpu->arch.mmu.reset_msr(vcpu);
126}
127
128void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
129{
130 unsigned int prio;
131
132 vcpu->stat.queue_intr++;
133 switch (vec) {
134 case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break;
135 case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break;
136 case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break;
137 case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break;
138 case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break;
139 case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break;
140 case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break;
141 case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break;
142 case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break;
143 case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break;
144 case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break;
145 case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break;
146 case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break;
147 case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break;
148 case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break;
149 default: prio = BOOK3S_IRQPRIO_MAX; break;
150 }
151
152 set_bit(prio, &vcpu->arch.pending_exceptions);
153#ifdef EXIT_DEBUG
154 printk(KERN_INFO "Queueing interrupt %x\n", vec);
155#endif
156}
157
158
159void kvmppc_core_queue_program(struct kvm_vcpu *vcpu)
160{
161 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_PROGRAM);
162}
163
164void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
165{
166 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
167}
168
169int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
170{
171 return test_bit(BOOK3S_INTERRUPT_DECREMENTER >> 7, &vcpu->arch.pending_exceptions);
172}
173
174void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
175 struct kvm_interrupt *irq)
176{
177 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
178}
179
180int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
181{
182 int deliver = 1;
183 int vec = 0;
184
185 switch (priority) {
186 case BOOK3S_IRQPRIO_DECREMENTER:
187 deliver = vcpu->arch.msr & MSR_EE;
188 vec = BOOK3S_INTERRUPT_DECREMENTER;
189 break;
190 case BOOK3S_IRQPRIO_EXTERNAL:
191 deliver = vcpu->arch.msr & MSR_EE;
192 vec = BOOK3S_INTERRUPT_EXTERNAL;
193 break;
194 case BOOK3S_IRQPRIO_SYSTEM_RESET:
195 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
196 break;
197 case BOOK3S_IRQPRIO_MACHINE_CHECK:
198 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
199 break;
200 case BOOK3S_IRQPRIO_DATA_STORAGE:
201 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
202 break;
203 case BOOK3S_IRQPRIO_INST_STORAGE:
204 vec = BOOK3S_INTERRUPT_INST_STORAGE;
205 break;
206 case BOOK3S_IRQPRIO_DATA_SEGMENT:
207 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
208 break;
209 case BOOK3S_IRQPRIO_INST_SEGMENT:
210 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
211 break;
212 case BOOK3S_IRQPRIO_ALIGNMENT:
213 vec = BOOK3S_INTERRUPT_ALIGNMENT;
214 break;
215 case BOOK3S_IRQPRIO_PROGRAM:
216 vec = BOOK3S_INTERRUPT_PROGRAM;
217 break;
218 case BOOK3S_IRQPRIO_VSX:
219 vec = BOOK3S_INTERRUPT_VSX;
220 break;
221 case BOOK3S_IRQPRIO_ALTIVEC:
222 vec = BOOK3S_INTERRUPT_ALTIVEC;
223 break;
224 case BOOK3S_IRQPRIO_FP_UNAVAIL:
225 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
226 break;
227 case BOOK3S_IRQPRIO_SYSCALL:
228 vec = BOOK3S_INTERRUPT_SYSCALL;
229 break;
230 case BOOK3S_IRQPRIO_DEBUG:
231 vec = BOOK3S_INTERRUPT_TRACE;
232 break;
233 case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
234 vec = BOOK3S_INTERRUPT_PERFMON;
235 break;
236 default:
237 deliver = 0;
238 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
239 break;
240 }
241
242#if 0
243 printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
244#endif
245
246 if (deliver)
247 kvmppc_inject_interrupt(vcpu, vec, 0ULL);
248
249 return deliver;
250}
251
252void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
253{
254 unsigned long *pending = &vcpu->arch.pending_exceptions;
255 unsigned int priority;
256
257 /* XXX be more clever here - no need to mftb() on every entry */
258 /* Issue DEC again if it's still active */
259#ifdef AGGRESSIVE_DEC
260 if (vcpu->arch.msr & MSR_EE)
261 if (kvmppc_get_dec(vcpu) & 0x80000000)
262 kvmppc_core_queue_dec(vcpu);
263#endif
264
265#ifdef EXIT_DEBUG
266 if (vcpu->arch.pending_exceptions)
267 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
268#endif
269 priority = __ffs(*pending);
270 while (priority <= (sizeof(unsigned int) * 8)) {
271 if (kvmppc_book3s_irqprio_deliver(vcpu, priority)) {
272 clear_bit(priority, &vcpu->arch.pending_exceptions);
273 break;
274 }
275
276 priority = find_next_bit(pending,
277 BITS_PER_BYTE * sizeof(*pending),
278 priority + 1);
279 }
280}
281
282void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
283{
284 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
285 vcpu->arch.pvr = pvr;
286 if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
287 kvmppc_mmu_book3s_64_init(vcpu);
288 to_book3s(vcpu)->hior = 0xfff00000;
289 to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
290 } else {
291 kvmppc_mmu_book3s_32_init(vcpu);
292 to_book3s(vcpu)->hior = 0;
293 to_book3s(vcpu)->msr_mask = 0xffffffffULL;
294 }
295
296 /* If we are in hypervisor level on 970, we can tell the CPU to
297 * treat DCBZ as 32 bytes store */
298 vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
299 if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
300 !strcmp(cur_cpu_spec->platform, "ppc970"))
301 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
302
303}
304
305/* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
306 * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
307 * emulate 32 bytes dcbz length.
308 *
309 * The Book3s_64 inventors also realized this case and implemented a special bit
310 * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
311 *
312 * My approach here is to patch the dcbz instruction on executing pages.
313 */
314static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
315{
316 bool touched = false;
317 hva_t hpage;
318 u32 *page;
319 int i;
320
321 hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
322 if (kvm_is_error_hva(hpage))
323 return;
324
325 hpage |= pte->raddr & ~PAGE_MASK;
326 hpage &= ~0xFFFULL;
327
328 page = vmalloc(HW_PAGE_SIZE);
329
330 if (copy_from_user(page, (void __user *)hpage, HW_PAGE_SIZE))
331 goto out;
332
333 for (i=0; i < HW_PAGE_SIZE / 4; i++)
334 if ((page[i] & 0xff0007ff) == INS_DCBZ) {
335 page[i] &= 0xfffffff7; // reserved instruction, so we trap
336 touched = true;
337 }
338
339 if (touched)
340 copy_to_user((void __user *)hpage, page, HW_PAGE_SIZE);
341
342out:
343 vfree(page);
344}
345
346static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
347 struct kvmppc_pte *pte)
348{
349 int relocated = (vcpu->arch.msr & (data ? MSR_DR : MSR_IR));
350 int r;
351
352 if (relocated) {
353 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data);
354 } else {
355 pte->eaddr = eaddr;
356 pte->raddr = eaddr & 0xffffffff;
357 pte->vpage = eaddr >> 12;
358 switch (vcpu->arch.msr & (MSR_DR|MSR_IR)) {
359 case 0:
360 pte->vpage |= VSID_REAL;
361 case MSR_DR:
362 pte->vpage |= VSID_REAL_DR;
363 case MSR_IR:
364 pte->vpage |= VSID_REAL_IR;
365 }
366 pte->may_read = true;
367 pte->may_write = true;
368 pte->may_execute = true;
369 r = 0;
370 }
371
372 return r;
373}
374
375static hva_t kvmppc_bad_hva(void)
376{
377 return PAGE_OFFSET;
378}
379
380static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
381 bool read)
382{
383 hva_t hpage;
384
385 if (read && !pte->may_read)
386 goto err;
387
388 if (!read && !pte->may_write)
389 goto err;
390
391 hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
392 if (kvm_is_error_hva(hpage))
393 goto err;
394
395 return hpage | (pte->raddr & ~PAGE_MASK);
396err:
397 return kvmppc_bad_hva();
398}
399
400int kvmppc_st(struct kvm_vcpu *vcpu, ulong eaddr, int size, void *ptr)
401{
402 struct kvmppc_pte pte;
403 hva_t hva = eaddr;
404
405 vcpu->stat.st++;
406
407 if (kvmppc_xlate(vcpu, eaddr, false, &pte))
408 goto err;
409
410 hva = kvmppc_pte_to_hva(vcpu, &pte, false);
411 if (kvm_is_error_hva(hva))
412 goto err;
413
414 if (copy_to_user((void __user *)hva, ptr, size)) {
415 printk(KERN_INFO "kvmppc_st at 0x%lx failed\n", hva);
416 goto err;
417 }
418
419 return 0;
420
421err:
422 return -ENOENT;
423}
424
425int kvmppc_ld(struct kvm_vcpu *vcpu, ulong eaddr, int size, void *ptr,
426 bool data)
427{
428 struct kvmppc_pte pte;
429 hva_t hva = eaddr;
430
431 vcpu->stat.ld++;
432
433 if (kvmppc_xlate(vcpu, eaddr, data, &pte))
434 goto err;
435
436 hva = kvmppc_pte_to_hva(vcpu, &pte, true);
437 if (kvm_is_error_hva(hva))
438 goto err;
439
440 if (copy_from_user(ptr, (void __user *)hva, size)) {
441 printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
442 goto err;
443 }
444
445 return 0;
446
447err:
448 return -ENOENT;
449}
450
451static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
452{
453 return kvm_is_visible_gfn(vcpu->kvm, gfn);
454}
455
456int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
457 ulong eaddr, int vec)
458{
459 bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
460 int r = RESUME_GUEST;
461 int relocated;
462 int page_found = 0;
463 struct kvmppc_pte pte;
464 bool is_mmio = false;
465
466 if ( vec == BOOK3S_INTERRUPT_DATA_STORAGE ) {
467 relocated = (vcpu->arch.msr & MSR_DR);
468 } else {
469 relocated = (vcpu->arch.msr & MSR_IR);
470 }
471
472 /* Resolve real address if translation turned on */
473 if (relocated) {
474 page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data);
475 } else {
476 pte.may_execute = true;
477 pte.may_read = true;
478 pte.may_write = true;
479 pte.raddr = eaddr & 0xffffffff;
480 pte.eaddr = eaddr;
481 pte.vpage = eaddr >> 12;
482 switch (vcpu->arch.msr & (MSR_DR|MSR_IR)) {
483 case 0:
484 pte.vpage |= VSID_REAL;
485 case MSR_DR:
486 pte.vpage |= VSID_REAL_DR;
487 case MSR_IR:
488 pte.vpage |= VSID_REAL_IR;
489 }
490 }
491
492 if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
493 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
494 /*
495 * If we do the dcbz hack, we have to NX on every execution,
496 * so we can patch the executing code. This renders our guest
497 * NX-less.
498 */
499 pte.may_execute = !data;
500 }
501
502 if (page_found == -ENOENT) {
503 /* Page not found in guest PTE entries */
504 vcpu->arch.dear = vcpu->arch.fault_dear;
505 to_book3s(vcpu)->dsisr = vcpu->arch.fault_dsisr;
506 vcpu->arch.msr |= (vcpu->arch.shadow_msr & 0x00000000f8000000ULL);
507 kvmppc_book3s_queue_irqprio(vcpu, vec);
508 } else if (page_found == -EPERM) {
509 /* Storage protection */
510 vcpu->arch.dear = vcpu->arch.fault_dear;
511 to_book3s(vcpu)->dsisr = vcpu->arch.fault_dsisr & ~DSISR_NOHPTE;
512 to_book3s(vcpu)->dsisr |= DSISR_PROTFAULT;
513 vcpu->arch.msr |= (vcpu->arch.shadow_msr & 0x00000000f8000000ULL);
514 kvmppc_book3s_queue_irqprio(vcpu, vec);
515 } else if (page_found == -EINVAL) {
516 /* Page not found in guest SLB */
517 vcpu->arch.dear = vcpu->arch.fault_dear;
518 kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
519 } else if (!is_mmio &&
520 kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) {
521 /* The guest's PTE is not mapped yet. Map on the host */
522 kvmppc_mmu_map_page(vcpu, &pte);
523 if (data)
524 vcpu->stat.sp_storage++;
525 else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
526 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
527 kvmppc_patch_dcbz(vcpu, &pte);
528 } else {
529 /* MMIO */
530 vcpu->stat.mmio_exits++;
531 vcpu->arch.paddr_accessed = pte.raddr;
532 r = kvmppc_emulate_mmio(run, vcpu);
533 if ( r == RESUME_HOST_NV )
534 r = RESUME_HOST;
535 if ( r == RESUME_GUEST_NV )
536 r = RESUME_GUEST;
537 }
538
539 return r;
540}
541
542int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
543 unsigned int exit_nr)
544{
545 int r = RESUME_HOST;
546
547 vcpu->stat.sum_exits++;
548
549 run->exit_reason = KVM_EXIT_UNKNOWN;
550 run->ready_for_interrupt_injection = 1;
551#ifdef EXIT_DEBUG
552 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | dec=0x%x | msr=0x%lx\n",
553 exit_nr, vcpu->arch.pc, vcpu->arch.fault_dear,
554 kvmppc_get_dec(vcpu), vcpu->arch.msr);
555#elif defined (EXIT_DEBUG_SIMPLE)
556 if ((exit_nr != 0x900) && (exit_nr != 0x500))
557 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | msr=0x%lx\n",
558 exit_nr, vcpu->arch.pc, vcpu->arch.fault_dear,
559 vcpu->arch.msr);
560#endif
561 kvm_resched(vcpu);
562 switch (exit_nr) {
563 case BOOK3S_INTERRUPT_INST_STORAGE:
564 vcpu->stat.pf_instruc++;
565 /* only care about PTEG not found errors, but leave NX alone */
566 if (vcpu->arch.shadow_msr & 0x40000000) {
567 r = kvmppc_handle_pagefault(run, vcpu, vcpu->arch.pc, exit_nr);
568 vcpu->stat.sp_instruc++;
569 } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
570 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
571 /*
572 * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
573 * so we can't use the NX bit inside the guest. Let's cross our fingers,
574 * that no guest that needs the dcbz hack does NX.
575 */
576 kvmppc_mmu_pte_flush(vcpu, vcpu->arch.pc, ~0xFFFULL);
577 } else {
578 vcpu->arch.msr |= (vcpu->arch.shadow_msr & 0x58000000);
579 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
580 kvmppc_mmu_pte_flush(vcpu, vcpu->arch.pc, ~0xFFFULL);
581 r = RESUME_GUEST;
582 }
583 break;
584 case BOOK3S_INTERRUPT_DATA_STORAGE:
585 vcpu->stat.pf_storage++;
586 /* The only case we need to handle is missing shadow PTEs */
587 if (vcpu->arch.fault_dsisr & DSISR_NOHPTE) {
588 r = kvmppc_handle_pagefault(run, vcpu, vcpu->arch.fault_dear, exit_nr);
589 } else {
590 vcpu->arch.dear = vcpu->arch.fault_dear;
591 to_book3s(vcpu)->dsisr = vcpu->arch.fault_dsisr;
592 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
593 kvmppc_mmu_pte_flush(vcpu, vcpu->arch.dear, ~0xFFFULL);
594 r = RESUME_GUEST;
595 }
596 break;
597 case BOOK3S_INTERRUPT_DATA_SEGMENT:
598 if (kvmppc_mmu_map_segment(vcpu, vcpu->arch.fault_dear) < 0) {
599 vcpu->arch.dear = vcpu->arch.fault_dear;
600 kvmppc_book3s_queue_irqprio(vcpu,
601 BOOK3S_INTERRUPT_DATA_SEGMENT);
602 }
603 r = RESUME_GUEST;
604 break;
605 case BOOK3S_INTERRUPT_INST_SEGMENT:
606 if (kvmppc_mmu_map_segment(vcpu, vcpu->arch.pc) < 0) {
607 kvmppc_book3s_queue_irqprio(vcpu,
608 BOOK3S_INTERRUPT_INST_SEGMENT);
609 }
610 r = RESUME_GUEST;
611 break;
612 /* We're good on these - the host merely wanted to get our attention */
613 case BOOK3S_INTERRUPT_DECREMENTER:
614 vcpu->stat.dec_exits++;
615 r = RESUME_GUEST;
616 break;
617 case BOOK3S_INTERRUPT_EXTERNAL:
618 vcpu->stat.ext_intr_exits++;
619 r = RESUME_GUEST;
620 break;
621 case BOOK3S_INTERRUPT_PROGRAM:
622 {
623 enum emulation_result er;
624
625 if (vcpu->arch.msr & MSR_PR) {
626#ifdef EXIT_DEBUG
627 printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", vcpu->arch.pc, vcpu->arch.last_inst);
628#endif
629 if ((vcpu->arch.last_inst & 0xff0007ff) !=
630 (INS_DCBZ & 0xfffffff7)) {
631 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
632 r = RESUME_GUEST;
633 break;
634 }
635 }
636
637 vcpu->stat.emulated_inst_exits++;
638 er = kvmppc_emulate_instruction(run, vcpu);
639 switch (er) {
640 case EMULATE_DONE:
641 r = RESUME_GUEST;
642 break;
643 case EMULATE_FAIL:
644 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
645 __func__, vcpu->arch.pc, vcpu->arch.last_inst);
646 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
647 r = RESUME_GUEST;
648 break;
649 default:
650 BUG();
651 }
652 break;
653 }
654 case BOOK3S_INTERRUPT_SYSCALL:
655#ifdef EXIT_DEBUG
656 printk(KERN_INFO "Syscall Nr %d\n", (int)vcpu->arch.gpr[0]);
657#endif
658 vcpu->stat.syscall_exits++;
659 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
660 r = RESUME_GUEST;
661 break;
662 case BOOK3S_INTERRUPT_MACHINE_CHECK:
663 case BOOK3S_INTERRUPT_FP_UNAVAIL:
664 case BOOK3S_INTERRUPT_TRACE:
665 case BOOK3S_INTERRUPT_ALTIVEC:
666 case BOOK3S_INTERRUPT_VSX:
667 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
668 r = RESUME_GUEST;
669 break;
670 default:
671 /* Ugh - bork here! What did we get? */
672 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n", exit_nr, vcpu->arch.pc, vcpu->arch.shadow_msr);
673 r = RESUME_HOST;
674 BUG();
675 break;
676 }
677
678
679 if (!(r & RESUME_HOST)) {
680 /* To avoid clobbering exit_reason, only check for signals if
681 * we aren't already exiting to userspace for some other
682 * reason. */
683 if (signal_pending(current)) {
684#ifdef EXIT_DEBUG
685 printk(KERN_EMERG "KVM: Going back to host\n");
686#endif
687 vcpu->stat.signal_exits++;
688 run->exit_reason = KVM_EXIT_INTR;
689 r = -EINTR;
690 } else {
691 /* In case an interrupt came in that was triggered
692 * from userspace (like DEC), we need to check what
693 * to inject now! */
694 kvmppc_core_deliver_interrupts(vcpu);
695 }
696 }
697
698#ifdef EXIT_DEBUG
699 printk(KERN_EMERG "KVM exit: vcpu=0x%p pc=0x%lx r=0x%x\n", vcpu, vcpu->arch.pc, r);
700#endif
701
702 return r;
703}
704
705int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
706{
707 return 0;
708}
709
710int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
711{
712 int i;
713
714 regs->pc = vcpu->arch.pc;
715 regs->cr = vcpu->arch.cr;
716 regs->ctr = vcpu->arch.ctr;
717 regs->lr = vcpu->arch.lr;
718 regs->xer = vcpu->arch.xer;
719 regs->msr = vcpu->arch.msr;
720 regs->srr0 = vcpu->arch.srr0;
721 regs->srr1 = vcpu->arch.srr1;
722 regs->pid = vcpu->arch.pid;
723 regs->sprg0 = vcpu->arch.sprg0;
724 regs->sprg1 = vcpu->arch.sprg1;
725 regs->sprg2 = vcpu->arch.sprg2;
726 regs->sprg3 = vcpu->arch.sprg3;
727 regs->sprg5 = vcpu->arch.sprg4;
728 regs->sprg6 = vcpu->arch.sprg5;
729 regs->sprg7 = vcpu->arch.sprg6;
730
731 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
732 regs->gpr[i] = vcpu->arch.gpr[i];
733
734 return 0;
735}
736
737int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
738{
739 int i;
740
741 vcpu->arch.pc = regs->pc;
742 vcpu->arch.cr = regs->cr;
743 vcpu->arch.ctr = regs->ctr;
744 vcpu->arch.lr = regs->lr;
745 vcpu->arch.xer = regs->xer;
746 kvmppc_set_msr(vcpu, regs->msr);
747 vcpu->arch.srr0 = regs->srr0;
748 vcpu->arch.srr1 = regs->srr1;
749 vcpu->arch.sprg0 = regs->sprg0;
750 vcpu->arch.sprg1 = regs->sprg1;
751 vcpu->arch.sprg2 = regs->sprg2;
752 vcpu->arch.sprg3 = regs->sprg3;
753 vcpu->arch.sprg5 = regs->sprg4;
754 vcpu->arch.sprg6 = regs->sprg5;
755 vcpu->arch.sprg7 = regs->sprg6;
756
757 for (i = 0; i < ARRAY_SIZE(vcpu->arch.gpr); i++)
758 vcpu->arch.gpr[i] = regs->gpr[i];
759
760 return 0;
761}
762
763int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
764 struct kvm_sregs *sregs)
765{
766 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
767 int i;
768
769 sregs->pvr = vcpu->arch.pvr;
770
771 sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
772 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
773 for (i = 0; i < 64; i++) {
774 sregs->u.s.ppc64.slb[i].slbe = vcpu3s->slb[i].orige | i;
775 sregs->u.s.ppc64.slb[i].slbv = vcpu3s->slb[i].origv;
776 }
777 } else {
778 for (i = 0; i < 16; i++) {
779 sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw;
780 sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw;
781 }
782 for (i = 0; i < 8; i++) {
783 sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
784 sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
785 }
786 }
787 return 0;
788}
789
790int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
791 struct kvm_sregs *sregs)
792{
793 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
794 int i;
795
796 kvmppc_set_pvr(vcpu, sregs->pvr);
797
798 vcpu3s->sdr1 = sregs->u.s.sdr1;
799 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
800 for (i = 0; i < 64; i++) {
801 vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv,
802 sregs->u.s.ppc64.slb[i].slbe);
803 }
804 } else {
805 for (i = 0; i < 16; i++) {
806 vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
807 }
808 for (i = 0; i < 8; i++) {
809 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
810 (u32)sregs->u.s.ppc32.ibat[i]);
811 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
812 (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
813 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
814 (u32)sregs->u.s.ppc32.dbat[i]);
815 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
816 (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
817 }
818 }
819
820 /* Flush the MMU after messing with the segments */
821 kvmppc_mmu_pte_flush(vcpu, 0, 0);
822 return 0;
823}
824
825int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
826{
827 return -ENOTSUPP;
828}
829
830int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
831{
832 return -ENOTSUPP;
833}
834
835int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
836 struct kvm_translation *tr)
837{
838 return 0;
839}
840
841/*
842 * Get (and clear) the dirty memory log for a memory slot.
843 */
844int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
845 struct kvm_dirty_log *log)
846{
847 struct kvm_memory_slot *memslot;
848 struct kvm_vcpu *vcpu;
849 ulong ga, ga_end;
850 int is_dirty = 0;
851 int r, n;
852
853 down_write(&kvm->slots_lock);
854
855 r = kvm_get_dirty_log(kvm, log, &is_dirty);
856 if (r)
857 goto out;
858
859 /* If nothing is dirty, don't bother messing with page tables. */
860 if (is_dirty) {
861 memslot = &kvm->memslots[log->slot];
862
863 ga = memslot->base_gfn << PAGE_SHIFT;
864 ga_end = ga + (memslot->npages << PAGE_SHIFT);
865
866 kvm_for_each_vcpu(n, vcpu, kvm)
867 kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
868
869 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
870 memset(memslot->dirty_bitmap, 0, n);
871 }
872
873 r = 0;
874out:
875 up_write(&kvm->slots_lock);
876 return r;
877}
878
879int kvmppc_core_check_processor_compat(void)
880{
881 return 0;
882}
883
884struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
885{
886 struct kvmppc_vcpu_book3s *vcpu_book3s;
887 struct kvm_vcpu *vcpu;
888 int err;
889
890 vcpu_book3s = (struct kvmppc_vcpu_book3s *)__get_free_pages( GFP_KERNEL | __GFP_ZERO,
891 get_order(sizeof(struct kvmppc_vcpu_book3s)));
892 if (!vcpu_book3s) {
893 err = -ENOMEM;
894 goto out;
895 }
896
897 vcpu = &vcpu_book3s->vcpu;
898 err = kvm_vcpu_init(vcpu, kvm, id);
899 if (err)
900 goto free_vcpu;
901
902 vcpu->arch.host_retip = kvm_return_point;
903 vcpu->arch.host_msr = mfmsr();
904 /* default to book3s_64 (970fx) */
905 vcpu->arch.pvr = 0x3C0301;
906 kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
907 vcpu_book3s->slb_nr = 64;
908
909 /* remember where some real-mode handlers are */
910 vcpu->arch.trampoline_lowmem = kvmppc_trampoline_lowmem;
911 vcpu->arch.trampoline_enter = kvmppc_trampoline_enter;
912 vcpu->arch.highmem_handler = (ulong)kvmppc_handler_highmem;
913
914 vcpu->arch.shadow_msr = MSR_USER64;
915
916 err = __init_new_context();
917 if (err < 0)
918 goto free_vcpu;
919 vcpu_book3s->context_id = err;
920
921 vcpu_book3s->vsid_max = ((vcpu_book3s->context_id + 1) << USER_ESID_BITS) - 1;
922 vcpu_book3s->vsid_first = vcpu_book3s->context_id << USER_ESID_BITS;
923 vcpu_book3s->vsid_next = vcpu_book3s->vsid_first;
924
925 return vcpu;
926
927free_vcpu:
928 free_pages((long)vcpu_book3s, get_order(sizeof(struct kvmppc_vcpu_book3s)));
929out:
930 return ERR_PTR(err);
931}
932
933void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
934{
935 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
936
937 __destroy_context(vcpu_book3s->context_id);
938 kvm_vcpu_uninit(vcpu);
939 free_pages((long)vcpu_book3s, get_order(sizeof(struct kvmppc_vcpu_book3s)));
940}
941
942extern int __kvmppc_vcpu_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
943int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
944{
945 int ret;
946
947 /* No need to go into the guest when all we do is going out */
948 if (signal_pending(current)) {
949 kvm_run->exit_reason = KVM_EXIT_INTR;
950 return -EINTR;
951 }
952
953 /* XXX we get called with irq disabled - change that! */
954 local_irq_enable();
955
956 ret = __kvmppc_vcpu_entry(kvm_run, vcpu);
957
958 local_irq_disable();
959
960 return ret;
961}
962
963static int kvmppc_book3s_init(void)
964{
965 return kvm_init(NULL, sizeof(struct kvmppc_vcpu_book3s), THIS_MODULE);
966}
967
968static void kvmppc_book3s_exit(void)
969{
970 kvm_exit();
971}
972
973module_init(kvmppc_book3s_init);
974module_exit(kvmppc_book3s_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-30 03:57:18 -0500