projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
KVM: powerpc: Move vector to irqprio resolving to separate function
[linux-2.6-block.git] / arch / powerpc / kvm / book3s.c
CommitLineData
2f4cf5e4
AG		 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
583617b7 128static int kvmppc_book3s_vec2irqprio(unsigned int vec)
2f4cf5e4
AG		 129{
130 unsigned int prio;
131
2f4cf5e4
AG		 132 switch (vec) {
133 case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break;
134 case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break;
135 case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break;
136 case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break;
137 case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break;
138 case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break;
139 case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break;
140 case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break;
141 case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break;
142 case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break;
143 case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break;
144 case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break;
145 case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break;
146 case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break;
147 case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break;
148 default: prio = BOOK3S_IRQPRIO_MAX; break;
149 }
150
583617b7
AG		 151 return prio;
152}
153
154void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
155{
156 vcpu->stat.queue_intr++;
157
158 set_bit(kvmppc_book3s_vec2irqprio(vec),
159 &vcpu->arch.pending_exceptions);
2f4cf5e4
AG		 160#ifdef EXIT_DEBUG
161 printk(KERN_INFO "Queueing interrupt %x\n", vec);
162#endif
163}
164
165
166void kvmppc_core_queue_program(struct kvm_vcpu *vcpu)
167{
168 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_PROGRAM);
169}
170
171void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
172{
173 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
174}
175
176int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
177{
178 return test_bit(BOOK3S_INTERRUPT_DECREMENTER >> 7, &vcpu->arch.pending_exceptions);
179}
180
181void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
182 struct kvm_interrupt *irq)
183{
184 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
185}
186
187int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
188{
189 int deliver = 1;
190 int vec = 0;
191
192 switch (priority) {
193 case BOOK3S_IRQPRIO_DECREMENTER:
194 deliver = vcpu->arch.msr & MSR_EE;
195 vec = BOOK3S_INTERRUPT_DECREMENTER;
196 break;
197 case BOOK3S_IRQPRIO_EXTERNAL:
198 deliver = vcpu->arch.msr & MSR_EE;
199 vec = BOOK3S_INTERRUPT_EXTERNAL;
200 break;
201 case BOOK3S_IRQPRIO_SYSTEM_RESET:
202 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
203 break;
204 case BOOK3S_IRQPRIO_MACHINE_CHECK:
205 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
206 break;
207 case BOOK3S_IRQPRIO_DATA_STORAGE:
208 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
209 break;
210 case BOOK3S_IRQPRIO_INST_STORAGE:
211 vec = BOOK3S_INTERRUPT_INST_STORAGE;
212 break;
213 case BOOK3S_IRQPRIO_DATA_SEGMENT:
214 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
215 break;
216 case BOOK3S_IRQPRIO_INST_SEGMENT:
217 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
218 break;
219 case BOOK3S_IRQPRIO_ALIGNMENT:
220 vec = BOOK3S_INTERRUPT_ALIGNMENT;
221 break;
222 case BOOK3S_IRQPRIO_PROGRAM:
223 vec = BOOK3S_INTERRUPT_PROGRAM;
224 break;
225 case BOOK3S_IRQPRIO_VSX:
226 vec = BOOK3S_INTERRUPT_VSX;
227 break;
228 case BOOK3S_IRQPRIO_ALTIVEC:
229 vec = BOOK3S_INTERRUPT_ALTIVEC;
230 break;
231 case BOOK3S_IRQPRIO_FP_UNAVAIL:
232 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
233 break;
234 case BOOK3S_IRQPRIO_SYSCALL:
235 vec = BOOK3S_INTERRUPT_SYSCALL;
236 break;
237 case BOOK3S_IRQPRIO_DEBUG:
238 vec = BOOK3S_INTERRUPT_TRACE;
239 break;
240 case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
241 vec = BOOK3S_INTERRUPT_PERFMON;
242 break;
243 default:
244 deliver = 0;
245 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
246 break;
247 }
248
249#if 0
250 printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
251#endif
252
253 if (deliver)
254 kvmppc_inject_interrupt(vcpu, vec, 0ULL);
255
256 return deliver;
257}
258
259void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
260{
261 unsigned long *pending = &vcpu->arch.pending_exceptions;
262 unsigned int priority;
263
264 /* XXX be more clever here - no need to mftb() on every entry */
265 /* Issue DEC again if it's still active */
266#ifdef AGGRESSIVE_DEC
267 if (vcpu->arch.msr & MSR_EE)
268 if (kvmppc_get_dec(vcpu) & 0x80000000)
269 kvmppc_core_queue_dec(vcpu);
270#endif
271
272#ifdef EXIT_DEBUG
273 if (vcpu->arch.pending_exceptions)
274 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
275#endif
276 priority = __ffs(*pending);
277 while (priority <= (sizeof(unsigned int) * 8)) {
278 if (kvmppc_book3s_irqprio_deliver(vcpu, priority)) {
279 clear_bit(priority, &vcpu->arch.pending_exceptions);
280 break;
281 }
282
283 priority = find_next_bit(pending,
284 BITS_PER_BYTE * sizeof(*pending),
285 priority + 1);
286 }
287}
288
289void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
290{
e15a1137 291 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
2f4cf5e4
AG		 292 vcpu->arch.pvr = pvr;
293 if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
294 kvmppc_mmu_book3s_64_init(vcpu);
295 to_book3s(vcpu)->hior = 0xfff00000;
296 to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
297 } else {
298 kvmppc_mmu_book3s_32_init(vcpu);
299 to_book3s(vcpu)->hior = 0;
300 to_book3s(vcpu)->msr_mask = 0xffffffffULL;
301 }
302
303 /* If we are in hypervisor level on 970, we can tell the CPU to
304 * treat DCBZ as 32 bytes store */
305 vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
306 if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
307 !strcmp(cur_cpu_spec->platform, "ppc970"))
308 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
309
310}
311
312/* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
313 * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
314 * emulate 32 bytes dcbz length.
315 *
316 * The Book3s_64 inventors also realized this case and implemented a special bit
317 * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
318 *
319 * My approach here is to patch the dcbz instruction on executing pages.
320 */
321static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
322{
323 bool touched = false;
324 hva_t hpage;
325 u32 *page;
326 int i;
327
328 hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
329 if (kvm_is_error_hva(hpage))
330 return;
331
332 hpage |= pte->raddr & ~PAGE_MASK;
333 hpage &= ~0xFFFULL;
334
335 page = vmalloc(HW_PAGE_SIZE);
336
337 if (copy_from_user(page, (void __user *)hpage, HW_PAGE_SIZE))
338 goto out;
339
340 for (i=0; i < HW_PAGE_SIZE / 4; i++)
341 if ((page[i] & 0xff0007ff) == INS_DCBZ) {
342 page[i] &= 0xfffffff7; // reserved instruction, so we trap
343 touched = true;
344 }
345
346 if (touched)
347 copy_to_user((void __user *)hpage, page, HW_PAGE_SIZE);
348
349out:
350 vfree(page);
351}
352
353static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
354 struct kvmppc_pte *pte)
355{
356 int relocated = (vcpu->arch.msr & (data ? MSR_DR : MSR_IR));
357 int r;
358
359 if (relocated) {
360 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data);
361 } else {
362 pte->eaddr = eaddr;
363 pte->raddr = eaddr & 0xffffffff;
364 pte->vpage = eaddr >> 12;
365 switch (vcpu->arch.msr & (MSR_DR|MSR_IR)) {
366 case 0:
367 pte->vpage |= VSID_REAL;
368 case MSR_DR:
369 pte->vpage |= VSID_REAL_DR;
370 case MSR_IR:
371 pte->vpage |= VSID_REAL_IR;
372 }
373 pte->may_read = true;
374 pte->may_write = true;
375 pte->may_execute = true;
376 r = 0;
377 }
378
379 return r;
380}
381
382static hva_t kvmppc_bad_hva(void)
383{
384 return PAGE_OFFSET;
385}
386
387static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
388 bool read)
389{
390 hva_t hpage;
391
392 if (read && !pte->may_read)
393 goto err;
394
395 if (!read && !pte->may_write)
396 goto err;
397
398 hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
399 if (kvm_is_error_hva(hpage))
400 goto err;
401
402 return hpage | (pte->raddr & ~PAGE_MASK);
403err:
404 return kvmppc_bad_hva();
405}
406
407int kvmppc_st(struct kvm_vcpu *vcpu, ulong eaddr, int size, void *ptr)
408{
409 struct kvmppc_pte pte;
410 hva_t hva = eaddr;
411
412 vcpu->stat.st++;
413
414 if (kvmppc_xlate(vcpu, eaddr, false, &pte))
415 goto err;
416
417 hva = kvmppc_pte_to_hva(vcpu, &pte, false);
418 if (kvm_is_error_hva(hva))
419 goto err;
420
421 if (copy_to_user((void __user *)hva, ptr, size)) {
422 printk(KERN_INFO "kvmppc_st at 0x%lx failed\n", hva);
423 goto err;
424 }
425
426 return 0;
427
428err:
429 return -ENOENT;
430}
431
432int kvmppc_ld(struct kvm_vcpu *vcpu, ulong eaddr, int size, void *ptr,
433 bool data)
434{
435 struct kvmppc_pte pte;
436 hva_t hva = eaddr;
437
438 vcpu->stat.ld++;
439
440 if (kvmppc_xlate(vcpu, eaddr, data, &pte))
441 goto err;
442
443 hva = kvmppc_pte_to_hva(vcpu, &pte, true);
444 if (kvm_is_error_hva(hva))
445 goto err;
446
447 if (copy_from_user(ptr, (void __user *)hva, size)) {
448 printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
449 goto err;
450 }
451
452 return 0;
453
454err:
455 return -ENOENT;
456}
457
458static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
459{
460 return kvm_is_visible_gfn(vcpu->kvm, gfn);
461}
462
463int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
464 ulong eaddr, int vec)
465{
466 bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
467 int r = RESUME_GUEST;
468 int relocated;
469 int page_found = 0;
470 struct kvmppc_pte pte;
471 bool is_mmio = false;
472
473 if ( vec == BOOK3S_INTERRUPT_DATA_STORAGE ) {
474 relocated = (vcpu->arch.msr & MSR_DR);
475 } else {
476 relocated = (vcpu->arch.msr & MSR_IR);
477 }
478
479 /* Resolve real address if translation turned on */
480 if (relocated) {
481 page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data);
482 } else {
483 pte.may_execute = true;
484 pte.may_read = true;
485 pte.may_write = true;
486 pte.raddr = eaddr & 0xffffffff;
487 pte.eaddr = eaddr;
488 pte.vpage = eaddr >> 12;
489 switch (vcpu->arch.msr & (MSR_DR|MSR_IR)) {
490 case 0:
491 pte.vpage |= VSID_REAL;
492 case MSR_DR:
493 pte.vpage |= VSID_REAL_DR;
494 case MSR_IR:
495 pte.vpage |= VSID_REAL_IR;
496 }
497 }
498
499 if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
500 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
501 /*
502 * If we do the dcbz hack, we have to NX on every execution,
503 * so we can patch the executing code. This renders our guest
504 * NX-less.
505 */
506 pte.may_execute = !data;
507 }
508
509 if (page_found == -ENOENT) {
510 /* Page not found in guest PTE entries */
511 vcpu->arch.dear = vcpu->arch.fault_dear;
512 to_book3s(vcpu)->dsisr = vcpu->arch.fault_dsisr;
513 vcpu->arch.msr |= (vcpu->arch.shadow_msr & 0x00000000f8000000ULL);
514 kvmppc_book3s_queue_irqprio(vcpu, vec);
515 } else if (page_found == -EPERM) {
516 /* Storage protection */
517 vcpu->arch.dear = vcpu->arch.fault_dear;
518 to_book3s(vcpu)->dsisr = vcpu->arch.fault_dsisr & ~DSISR_NOHPTE;
519 to_book3s(vcpu)->dsisr |= DSISR_PROTFAULT;
520 vcpu->arch.msr |= (vcpu->arch.shadow_msr & 0x00000000f8000000ULL);
521 kvmppc_book3s_queue_irqprio(vcpu, vec);
522 } else if (page_found == -EINVAL) {
523 /* Page not found in guest SLB */
524 vcpu->arch.dear = vcpu->arch.fault_dear;
525 kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
526 } else if (!is_mmio &&
527 kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) {
528 /* The guest's PTE is not mapped yet. Map on the host */
529 kvmppc_mmu_map_page(vcpu, &pte);
530 if (data)
531 vcpu->stat.sp_storage++;
532 else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
533 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
534 kvmppc_patch_dcbz(vcpu, &pte);
535 } else {
536 /* MMIO */
537 vcpu->stat.mmio_exits++;
538 vcpu->arch.paddr_accessed = pte.raddr;
539 r = kvmppc_emulate_mmio(run, vcpu);
540 if ( r == RESUME_HOST_NV )
541 r = RESUME_HOST;
542 if ( r == RESUME_GUEST_NV )
543 r = RESUME_GUEST;
544 }
545
546 return r;
547}
548
549int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
550 unsigned int exit_nr)
551{
552 int r = RESUME_HOST;
553
554 vcpu->stat.sum_exits++;
555
556 run->exit_reason = KVM_EXIT_UNKNOWN;
557 run->ready_for_interrupt_injection = 1;
558#ifdef EXIT_DEBUG
559 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | dec=0x%x | msr=0x%lx\n",
560 exit_nr, vcpu->arch.pc, vcpu->arch.fault_dear,
561 kvmppc_get_dec(vcpu), vcpu->arch.msr);
562#elif defined (EXIT_DEBUG_SIMPLE)
563 if ((exit_nr != 0x900) && (exit_nr != 0x500))
564 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | msr=0x%lx\n",
565 exit_nr, vcpu->arch.pc, vcpu->arch.fault_dear,
566 vcpu->arch.msr);
567#endif
568 kvm_resched(vcpu);
569 switch (exit_nr) {
570 case BOOK3S_INTERRUPT_INST_STORAGE:
571 vcpu->stat.pf_instruc++;
572 /* only care about PTEG not found errors, but leave NX alone */
573 if (vcpu->arch.shadow_msr & 0x40000000) {
574 r = kvmppc_handle_pagefault(run, vcpu, vcpu->arch.pc, exit_nr);
575 vcpu->stat.sp_instruc++;
576 } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
577 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
578 /*
579 * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
580 * so we can't use the NX bit inside the guest. Let's cross our fingers,
581 * that no guest that needs the dcbz hack does NX.
582 */
583 kvmppc_mmu_pte_flush(vcpu, vcpu->arch.pc, ~0xFFFULL);
584 } else {
585 vcpu->arch.msr |= (vcpu->arch.shadow_msr & 0x58000000);
586 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
587 kvmppc_mmu_pte_flush(vcpu, vcpu->arch.pc, ~0xFFFULL);
588 r = RESUME_GUEST;
589 }
590 break;
591 case BOOK3S_INTERRUPT_DATA_STORAGE:
592 vcpu->stat.pf_storage++;
593 /* The only case we need to handle is missing shadow PTEs */
594 if (vcpu->arch.fault_dsisr & DSISR_NOHPTE) {
595 r = kvmppc_handle_pagefault(run, vcpu, vcpu->arch.fault_dear, exit_nr);
596 } else {
597 vcpu->arch.dear = vcpu->arch.fault_dear;
598 to_book3s(vcpu)->dsisr = vcpu->arch.fault_dsisr;
599 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
600 kvmppc_mmu_pte_flush(vcpu, vcpu->arch.dear, ~0xFFFULL);
601 r = RESUME_GUEST;
602 }
603 break;
604 case BOOK3S_INTERRUPT_DATA_SEGMENT:
605 if (kvmppc_mmu_map_segment(vcpu, vcpu->arch.fault_dear) < 0) {
606 vcpu->arch.dear = vcpu->arch.fault_dear;
607 kvmppc_book3s_queue_irqprio(vcpu,
608 BOOK3S_INTERRUPT_DATA_SEGMENT);
609 }
610 r = RESUME_GUEST;
611 break;
612 case BOOK3S_INTERRUPT_INST_SEGMENT:
613 if (kvmppc_mmu_map_segment(vcpu, vcpu->arch.pc) < 0) {
614 kvmppc_book3s_queue_irqprio(vcpu,
615 BOOK3S_INTERRUPT_INST_SEGMENT);
616 }
617 r = RESUME_GUEST;
618 break;
619 /* We're good on these - the host merely wanted to get our attention */
620 case BOOK3S_INTERRUPT_DECREMENTER:
621 vcpu->stat.dec_exits++;
622 r = RESUME_GUEST;
623 break;
624 case BOOK3S_INTERRUPT_EXTERNAL:
625 vcpu->stat.ext_intr_exits++;
626 r = RESUME_GUEST;
627 break;
628 case BOOK3S_INTERRUPT_PROGRAM:
629 {
630 enum emulation_result er;
631
632 if (vcpu->arch.msr & MSR_PR) {
633#ifdef EXIT_DEBUG
634 printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", vcpu->arch.pc, vcpu->arch.last_inst);
635#endif
636 if ((vcpu->arch.last_inst & 0xff0007ff) !=
637 (INS_DCBZ & 0xfffffff7)) {
638 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
639 r = RESUME_GUEST;
640 break;
641 }
642 }
643
644 vcpu->stat.emulated_inst_exits++;
645 er = kvmppc_emulate_instruction(run, vcpu);
646 switch (er) {
647 case EMULATE_DONE:
648 r = RESUME_GUEST;
649 break;
650 case EMULATE_FAIL:
651 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
652 __func__, vcpu->arch.pc, vcpu->arch.last_inst);
653 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
654 r = RESUME_GUEST;
655 break;
656 default:
657 BUG();
658 }
659 break;
660 }
661 case BOOK3S_INTERRUPT_SYSCALL:
662#ifdef EXIT_DEBUG
663 printk(KERN_INFO "Syscall Nr %d\n", (int)vcpu->arch.gpr[0]);
664#endif
665 vcpu->stat.syscall_exits++;
666 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
667 r = RESUME_GUEST;
668 break;
669 case BOOK3S_INTERRUPT_MACHINE_CHECK:
670 case BOOK3S_INTERRUPT_FP_UNAVAIL:
671 case BOOK3S_INTERRUPT_TRACE:
672 case BOOK3S_INTERRUPT_ALTIVEC:
673 case BOOK3S_INTERRUPT_VSX:
674 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
675 r = RESUME_GUEST;
676 break;
677 default:
678 /* Ugh - bork here! What did we get? */
679 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n", exit_nr, vcpu->arch.pc, vcpu->arch.shadow_msr);
680 r = RESUME_HOST;
681 BUG();
682 break;
683 }
684
685
686 if (!(r & RESUME_HOST)) {
687 /* To avoid clobbering exit_reason, only check for signals if
688 * we aren't already exiting to userspace for some other
689 * reason. */
690 if (signal_pending(current)) {
691#ifdef EXIT_DEBUG
692 printk(KERN_EMERG "KVM: Going back to host\n");
693#endif
694 vcpu->stat.signal_exits++;
695 run->exit_reason = KVM_EXIT_INTR;
696 r = -EINTR;
697 } else {
698 /* In case an interrupt came in that was triggered
699 * from userspace (like DEC), we need to check what
700 * to inject now! */
701 kvmppc_core_deliver_interrupts(vcpu);
702 }
703 }
704
705#ifdef EXIT_DEBUG
706 printk(KERN_EMERG "KVM exit: vcpu=0x%p pc=0x%lx r=0x%x\n", vcpu, vcpu->arch.pc, r);
707#endif
708
709 return r;
710}
711
712int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
713{
714 return 0;
715}
716
717int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
718{
719 int i;
720
721 regs->pc = vcpu->arch.pc;
722 regs->cr = vcpu->arch.cr;
723 regs->ctr = vcpu->arch.ctr;
724 regs->lr = vcpu->arch.lr;
725 regs->xer = vcpu->arch.xer;
726 regs->msr = vcpu->arch.msr;
727 regs->srr0 = vcpu->arch.srr0;
728 regs->srr1 = vcpu->arch.srr1;
729 regs->pid = vcpu->arch.pid;
730 regs->sprg0 = vcpu->arch.sprg0;
731 regs->sprg1 = vcpu->arch.sprg1;
732 regs->sprg2 = vcpu->arch.sprg2;
733 regs->sprg3 = vcpu->arch.sprg3;
734 regs->sprg5 = vcpu->arch.sprg4;
735 regs->sprg6 = vcpu->arch.sprg5;
736 regs->sprg7 = vcpu->arch.sprg6;
737
738 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
739 regs->gpr[i] = vcpu->arch.gpr[i];
740
741 return 0;
742}
743
744int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
745{
746 int i;
747
748 vcpu->arch.pc = regs->pc;
749 vcpu->arch.cr = regs->cr;
750 vcpu->arch.ctr = regs->ctr;
751 vcpu->arch.lr = regs->lr;
752 vcpu->arch.xer = regs->xer;
753 kvmppc_set_msr(vcpu, regs->msr);
754 vcpu->arch.srr0 = regs->srr0;
755 vcpu->arch.srr1 = regs->srr1;
756 vcpu->arch.sprg0 = regs->sprg0;
757 vcpu->arch.sprg1 = regs->sprg1;
758 vcpu->arch.sprg2 = regs->sprg2;
759 vcpu->arch.sprg3 = regs->sprg3;
760 vcpu->arch.sprg5 = regs->sprg4;
761 vcpu->arch.sprg6 = regs->sprg5;
762 vcpu->arch.sprg7 = regs->sprg6;
763
764 for (i = 0; i < ARRAY_SIZE(vcpu->arch.gpr); i++)
765 vcpu->arch.gpr[i] = regs->gpr[i];
766
767 return 0;
768}
769
770int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
771 struct kvm_sregs *sregs)
772{
e15a1137
AG		 773 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
774 int i;
775
2f4cf5e4 776 sregs->pvr = vcpu->arch.pvr;
e15a1137
AG		 777
778 sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
779 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
780 for (i = 0; i < 64; i++) {
781 sregs->u.s.ppc64.slb[i].slbe = vcpu3s->slb[i].orige | i;
782 sregs->u.s.ppc64.slb[i].slbv = vcpu3s->slb[i].origv;
783 }
784 } else {
785 for (i = 0; i < 16; i++) {
786 sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw;
787 sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw;
788 }
789 for (i = 0; i < 8; i++) {
790 sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
791 sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
792 }
793 }
2f4cf5e4
AG		 794 return 0;
795}
796
797int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
798 struct kvm_sregs *sregs)
799{
e15a1137
AG		 800 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
801 int i;
802
2f4cf5e4 803 kvmppc_set_pvr(vcpu, sregs->pvr);
e15a1137
AG		 804
805 vcpu3s->sdr1 = sregs->u.s.sdr1;
806 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
807 for (i = 0; i < 64; i++) {
808 vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv,
809 sregs->u.s.ppc64.slb[i].slbe);
810 }
811 } else {
812 for (i = 0; i < 16; i++) {
813 vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
814 }
815 for (i = 0; i < 8; i++) {
816 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
817 (u32)sregs->u.s.ppc32.ibat[i]);
818 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
819 (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
820 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
821 (u32)sregs->u.s.ppc32.dbat[i]);
822 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
823 (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
824 }
825 }
826
827 /* Flush the MMU after messing with the segments */
828 kvmppc_mmu_pte_flush(vcpu, 0, 0);
2f4cf5e4
AG		 829 return 0;
830}
831
832int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
833{
834 return -ENOTSUPP;
835}
836
837int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
838{
839 return -ENOTSUPP;
840}
841
842int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
843 struct kvm_translation *tr)
844{
845 return 0;
846}
847
848/*
849 * Get (and clear) the dirty memory log for a memory slot.
850 */
851int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
852 struct kvm_dirty_log *log)
853{
854 struct kvm_memory_slot *memslot;
855 struct kvm_vcpu *vcpu;
856 ulong ga, ga_end;
857 int is_dirty = 0;
858 int r, n;
859
860 down_write(&kvm->slots_lock);
861
862 r = kvm_get_dirty_log(kvm, log, &is_dirty);
863 if (r)
864 goto out;
865
866 /* If nothing is dirty, don't bother messing with page tables. */
867 if (is_dirty) {
868 memslot = &kvm->memslots[log->slot];
869
870 ga = memslot->base_gfn << PAGE_SHIFT;
871 ga_end = ga + (memslot->npages << PAGE_SHIFT);
872
873 kvm_for_each_vcpu(n, vcpu, kvm)
874 kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
875
876 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
877 memset(memslot->dirty_bitmap, 0, n);
878 }
879
880 r = 0;
881out:
882 up_write(&kvm->slots_lock);
883 return r;
884}
885
886int kvmppc_core_check_processor_compat(void)
887{
888 return 0;
889}
890
891struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
892{
893 struct kvmppc_vcpu_book3s *vcpu_book3s;
894 struct kvm_vcpu *vcpu;
895 int err;
896
897 vcpu_book3s = (struct kvmppc_vcpu_book3s *)__get_free_pages( GFP_KERNEL | __GFP_ZERO,
898 get_order(sizeof(struct kvmppc_vcpu_book3s)));
899 if (!vcpu_book3s) {
900 err = -ENOMEM;
901 goto out;
902 }
903
904 vcpu = &vcpu_book3s->vcpu;
905 err = kvm_vcpu_init(vcpu, kvm, id);
906 if (err)
907 goto free_vcpu;
908
909 vcpu->arch.host_retip = kvm_return_point;
910 vcpu->arch.host_msr = mfmsr();
911 /* default to book3s_64 (970fx) */
912 vcpu->arch.pvr = 0x3C0301;
913 kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
914 vcpu_book3s->slb_nr = 64;
915
916 /* remember where some real-mode handlers are */
917 vcpu->arch.trampoline_lowmem = kvmppc_trampoline_lowmem;
918 vcpu->arch.trampoline_enter = kvmppc_trampoline_enter;
919 vcpu->arch.highmem_handler = (ulong)kvmppc_handler_highmem;
920
921 vcpu->arch.shadow_msr = MSR_USER64;
922
923 err = __init_new_context();
924 if (err < 0)
925 goto free_vcpu;
926 vcpu_book3s->context_id = err;
927
928 vcpu_book3s->vsid_max = ((vcpu_book3s->context_id + 1) << USER_ESID_BITS) - 1;
929 vcpu_book3s->vsid_first = vcpu_book3s->context_id << USER_ESID_BITS;
930 vcpu_book3s->vsid_next = vcpu_book3s->vsid_first;
931
932 return vcpu;
933
934free_vcpu:
935 free_pages((long)vcpu_book3s, get_order(sizeof(struct kvmppc_vcpu_book3s)));
936out:
937 return ERR_PTR(err);
938}
939
940void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
941{
942 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
943
944 __destroy_context(vcpu_book3s->context_id);
945 kvm_vcpu_uninit(vcpu);
946 free_pages((long)vcpu_book3s, get_order(sizeof(struct kvmppc_vcpu_book3s)));
947}
948
949extern int __kvmppc_vcpu_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
950int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
951{
952 int ret;
953
954 /* No need to go into the guest when all we do is going out */
955 if (signal_pending(current)) {
956 kvm_run->exit_reason = KVM_EXIT_INTR;
957 return -EINTR;
958 }
959
960 /* XXX we get called with irq disabled - change that! */
961 local_irq_enable();
962
963 ret = __kvmppc_vcpu_entry(kvm_run, vcpu);
964
965 local_irq_disable();
966
967 return ret;
968}
969
970static int kvmppc_book3s_init(void)
971{
972 return kvm_init(NULL, sizeof(struct kvmppc_vcpu_book3s), THIS_MODULE);
973}
974
975static void kvmppc_book3s_exit(void)
976{
977 kvm_exit();
978}
979
980module_init(kvmppc_book3s_init);
981module_exit(kvmppc_book3s_exit);
Linux 6.x block layer and io_uring tree(s)