]> git.proxmox.com Git - mirror_ubuntu-jammy-kernel.git/blame - arch/powerpc/kvm/book3s.c
projects / mirror_ubuntu-jammy-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
KVM: PPC: Implement hypervisor interface
[mirror_ubuntu-jammy-kernel.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>
329d20ba 19#include <linux/slab.h>
2f4cf5e4
AG		 20
21#include <asm/reg.h>
22#include <asm/cputable.h>
23#include <asm/cacheflush.h>
24#include <asm/tlbflush.h>
25#include <asm/uaccess.h>
26#include <asm/io.h>
27#include <asm/kvm_ppc.h>
28#include <asm/kvm_book3s.h>
29#include <asm/mmu_context.h>
5a0e3ad6 30#include <linux/gfp.h>
2f4cf5e4
AG		 31#include <linux/sched.h>
32#include <linux/vmalloc.h>
9fb244a2 33#include <linux/highmem.h>
2f4cf5e4
AG		 34
35#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
36
37/* #define EXIT_DEBUG */
38/* #define EXIT_DEBUG_SIMPLE */
180a34d2
AG		 39/* #define DEBUG_EXT */
40
c8c0b6f2
AG		 41static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
42 ulong msr);
2f4cf5e4 43
07b0907d
AG		 44/* Some compatibility defines */
45#ifdef CONFIG_PPC_BOOK3S_32
46#define MSR_USER32 MSR_USER
47#define MSR_USER64 MSR_USER
48#define HW_PAGE_SIZE PAGE_SIZE
49#endif
50
2f4cf5e4
AG		 51struct kvm_stats_debugfs_item debugfs_entries[] = {
52 { "exits", VCPU_STAT(sum_exits) },
53 { "mmio", VCPU_STAT(mmio_exits) },
54 { "sig", VCPU_STAT(signal_exits) },
55 { "sysc", VCPU_STAT(syscall_exits) },
56 { "inst_emu", VCPU_STAT(emulated_inst_exits) },
57 { "dec", VCPU_STAT(dec_exits) },
58 { "ext_intr", VCPU_STAT(ext_intr_exits) },
59 { "queue_intr", VCPU_STAT(queue_intr) },
60 { "halt_wakeup", VCPU_STAT(halt_wakeup) },
61 { "pf_storage", VCPU_STAT(pf_storage) },
62 { "sp_storage", VCPU_STAT(sp_storage) },
63 { "pf_instruc", VCPU_STAT(pf_instruc) },
64 { "sp_instruc", VCPU_STAT(sp_instruc) },
65 { "ld", VCPU_STAT(ld) },
66 { "ld_slow", VCPU_STAT(ld_slow) },
67 { "st", VCPU_STAT(st) },
68 { "st_slow", VCPU_STAT(st_slow) },
69 { NULL }
70};
71
72void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
73{
74}
75
76void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
77{
78}
79
80void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
81{
c7f38f46
AG		 82#ifdef CONFIG_PPC_BOOK3S_64
83 memcpy(to_svcpu(vcpu)->slb, to_book3s(vcpu)->slb_shadow, sizeof(to_svcpu(vcpu)->slb));
84 memcpy(&get_paca()->shadow_vcpu, to_book3s(vcpu)->shadow_vcpu,
7e57cba0 85 sizeof(get_paca()->shadow_vcpu));
c7f38f46
AG		 86 to_svcpu(vcpu)->slb_max = to_book3s(vcpu)->slb_shadow_max;
87#endif
88
89#ifdef CONFIG_PPC_BOOK3S_32
90 current->thread.kvm_shadow_vcpu = to_book3s(vcpu)->shadow_vcpu;
91#endif
2f4cf5e4
AG		 92}
93
94void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
95{
c7f38f46
AG		 96#ifdef CONFIG_PPC_BOOK3S_64
97 memcpy(to_book3s(vcpu)->slb_shadow, to_svcpu(vcpu)->slb, sizeof(to_svcpu(vcpu)->slb));
98 memcpy(to_book3s(vcpu)->shadow_vcpu, &get_paca()->shadow_vcpu,
7e57cba0 99 sizeof(get_paca()->shadow_vcpu));
c7f38f46
AG		 100 to_book3s(vcpu)->slb_shadow_max = to_svcpu(vcpu)->slb_max;
101#endif
180a34d2
AG		 102
103 kvmppc_giveup_ext(vcpu, MSR_FP);
104 kvmppc_giveup_ext(vcpu, MSR_VEC);
105 kvmppc_giveup_ext(vcpu, MSR_VSX);
2f4cf5e4
AG		 106}
107
0bb1fb71 108#if defined(EXIT_DEBUG)
2f4cf5e4
AG		 109static u32 kvmppc_get_dec(struct kvm_vcpu *vcpu)
110{
111 u64 jd = mftb() - vcpu->arch.dec_jiffies;
112 return vcpu->arch.dec - jd;
113}
114#endif
115
a76f8497
AG		 116static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu)
117{
666e7252
AG		 118 ulong smsr = vcpu->arch.shared->msr;
119
a76f8497 120 /* Guest MSR values */
666e7252 121 smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE | MSR_DE;
a76f8497 122 /* Process MSR values */
666e7252 123 smsr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | MSR_EE;
a76f8497 124 /* External providers the guest reserved */
666e7252 125 smsr |= (vcpu->arch.shared->msr & vcpu->arch.guest_owned_ext);
a76f8497
AG		 126 /* 64-bit Process MSR values */
127#ifdef CONFIG_PPC_BOOK3S_64
666e7252 128 smsr |= MSR_ISF | MSR_HV;
a76f8497 129#endif
666e7252 130 vcpu->arch.shadow_msr = smsr;
a76f8497
AG		 131}
132
2f4cf5e4
AG		 133void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
134{
666e7252 135 ulong old_msr = vcpu->arch.shared->msr;
2f4cf5e4
AG		 136
137#ifdef EXIT_DEBUG
138 printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr);
139#endif
a76f8497 140
2f4cf5e4 141 msr &= to_book3s(vcpu)->msr_mask;
666e7252 142 vcpu->arch.shared->msr = msr;
a76f8497 143 kvmppc_recalc_shadow_msr(vcpu);
2f4cf5e4
AG		 144
145 if (msr & (MSR_WE|MSR_POW)) {
146 if (!vcpu->arch.pending_exceptions) {
147 kvm_vcpu_block(vcpu);
148 vcpu->stat.halt_wakeup++;
149 }
150 }
151
666e7252 152 if ((vcpu->arch.shared->msr & (MSR_PR|MSR_IR|MSR_DR)) !=
f7bc74e1 153 (old_msr & (MSR_PR|MSR_IR|MSR_DR))) {
2f4cf5e4 154 kvmppc_mmu_flush_segments(vcpu);
c7f38f46 155 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
2f4cf5e4 156 }
d1bab74c
AG		 157
158 /* Preload FPU if it's enabled */
666e7252 159 if (vcpu->arch.shared->msr & MSR_FP)
d1bab74c 160 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
2f4cf5e4
AG		 161}
162
163void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
164{
de7906c3
AG		 165 vcpu->arch.shared->srr0 = kvmppc_get_pc(vcpu);
166 vcpu->arch.shared->srr1 = vcpu->arch.shared->msr | flags;
c7f38f46 167 kvmppc_set_pc(vcpu, to_book3s(vcpu)->hior + vec);
2f4cf5e4
AG		 168 vcpu->arch.mmu.reset_msr(vcpu);
169}
170
583617b7 171static int kvmppc_book3s_vec2irqprio(unsigned int vec)
2f4cf5e4
AG		 172{
173 unsigned int prio;
174
2f4cf5e4
AG		 175 switch (vec) {
176 case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break;
177 case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break;
178 case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break;
179 case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break;
180 case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break;
181 case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break;
182 case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break;
183 case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break;
184 case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break;
185 case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break;
186 case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break;
187 case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break;
188 case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break;
189 case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break;
190 case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break;
191 default: prio = BOOK3S_IRQPRIO_MAX; break;
192 }
193
583617b7
AG		 194 return prio;
195}
196
7706664d
AG		 197static void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
198 unsigned int vec)
199{
200 clear_bit(kvmppc_book3s_vec2irqprio(vec),
201 &vcpu->arch.pending_exceptions);
202}
203
583617b7
AG		 204void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
205{
206 vcpu->stat.queue_intr++;
207
208 set_bit(kvmppc_book3s_vec2irqprio(vec),
209 &vcpu->arch.pending_exceptions);
2f4cf5e4
AG		 210#ifdef EXIT_DEBUG
211 printk(KERN_INFO "Queueing interrupt %x\n", vec);
212#endif
213}
214
215
25a8a02d 216void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
2f4cf5e4 217{
25a8a02d 218 to_book3s(vcpu)->prog_flags = flags;
2f4cf5e4
AG		 219 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_PROGRAM);
220}
221
222void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
223{
224 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
225}
226
227int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
228{
229 return test_bit(BOOK3S_INTERRUPT_DECREMENTER >> 7, &vcpu->arch.pending_exceptions);
230}
231
7706664d
AG		 232void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
233{
234 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
235}
236
2f4cf5e4
AG		 237void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
238 struct kvm_interrupt *irq)
239{
240 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
241}
242
18978768
AG		 243void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
244 struct kvm_interrupt *irq)
245{
246 kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
247}
248
2f4cf5e4
AG		 249int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
250{
251 int deliver = 1;
252 int vec = 0;
25a8a02d 253 ulong flags = 0ULL;
2f4cf5e4
AG		 254
255 switch (priority) {
256 case BOOK3S_IRQPRIO_DECREMENTER:
666e7252 257 deliver = vcpu->arch.shared->msr & MSR_EE;
2f4cf5e4
AG		 258 vec = BOOK3S_INTERRUPT_DECREMENTER;
259 break;
260 case BOOK3S_IRQPRIO_EXTERNAL:
666e7252 261 deliver = vcpu->arch.shared->msr & MSR_EE;
2f4cf5e4
AG		 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;
25a8a02d 287 flags = to_book3s(vcpu)->prog_flags;
2f4cf5e4
AG		 288 break;
289 case BOOK3S_IRQPRIO_VSX:
290 vec = BOOK3S_INTERRUPT_VSX;
291 break;
292 case BOOK3S_IRQPRIO_ALTIVEC:
293 vec = BOOK3S_INTERRUPT_ALTIVEC;
294 break;
295 case BOOK3S_IRQPRIO_FP_UNAVAIL:
296 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
297 break;
298 case BOOK3S_IRQPRIO_SYSCALL:
299 vec = BOOK3S_INTERRUPT_SYSCALL;
300 break;
301 case BOOK3S_IRQPRIO_DEBUG:
302 vec = BOOK3S_INTERRUPT_TRACE;
303 break;
304 case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
305 vec = BOOK3S_INTERRUPT_PERFMON;
306 break;
307 default:
308 deliver = 0;
309 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
310 break;
311 }
312
313#if 0
314 printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
315#endif
316
317 if (deliver)
25a8a02d 318 kvmppc_inject_interrupt(vcpu, vec, flags);
2f4cf5e4
AG		 319
320 return deliver;
321}
322
323void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
324{
325 unsigned long *pending = &vcpu->arch.pending_exceptions;
326 unsigned int priority;
327
2f4cf5e4
AG		 328#ifdef EXIT_DEBUG
329 if (vcpu->arch.pending_exceptions)
330 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
331#endif
332 priority = __ffs(*pending);
ada7ba17 333 while (priority < BOOK3S_IRQPRIO_MAX) {
7706664d
AG		 334 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
335 (priority != BOOK3S_IRQPRIO_DECREMENTER)) {
336 /* DEC interrupts get cleared by mtdec */
2f4cf5e4
AG		 337 clear_bit(priority, &vcpu->arch.pending_exceptions);
338 break;
339 }
340
341 priority = find_next_bit(pending,
342 BITS_PER_BYTE * sizeof(*pending),
343 priority + 1);
344 }
345}
346
347void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
348{
b83d4a9c
AG		 349 u32 host_pvr;
350
e15a1137 351 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
2f4cf5e4 352 vcpu->arch.pvr = pvr;
07b0907d 353#ifdef CONFIG_PPC_BOOK3S_64
2f4cf5e4
AG		 354 if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
355 kvmppc_mmu_book3s_64_init(vcpu);
356 to_book3s(vcpu)->hior = 0xfff00000;
357 to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
07b0907d
AG		 358 } else
359#endif
360 {
2f4cf5e4
AG		 361 kvmppc_mmu_book3s_32_init(vcpu);
362 to_book3s(vcpu)->hior = 0;
363 to_book3s(vcpu)->msr_mask = 0xffffffffULL;
364 }
365
366 /* If we are in hypervisor level on 970, we can tell the CPU to
367 * treat DCBZ as 32 bytes store */
368 vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
369 if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
370 !strcmp(cur_cpu_spec->platform, "ppc970"))
371 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
372
05b0ab1c
AG		 373 /* Cell performs badly if MSR_FEx are set. So let's hope nobody
374 really needs them in a VM on Cell and force disable them. */
375 if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be"))
376 to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1);
07b0907d
AG		 377
378#ifdef CONFIG_PPC_BOOK3S_32
379 /* 32 bit Book3S always has 32 byte dcbz */
380 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
381#endif
b83d4a9c
AG		 382
383 /* On some CPUs we can execute paired single operations natively */
384 asm ( "mfpvr %0" : "=r"(host_pvr));
385 switch (host_pvr) {
386 case 0x00080200: /* lonestar 2.0 */
387 case 0x00088202: /* lonestar 2.2 */
388 case 0x70000100: /* gekko 1.0 */
389 case 0x00080100: /* gekko 2.0 */
390 case 0x00083203: /* gekko 2.3a */
391 case 0x00083213: /* gekko 2.3b */
392 case 0x00083204: /* gekko 2.4 */
393 case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */
394 case 0x00087200: /* broadway */
395 vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS;
396 /* Enable HID2.PSE - in case we need it later */
397 mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29));
398 }
2f4cf5e4
AG		 399}
400
401/* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
402 * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
403 * emulate 32 bytes dcbz length.
404 *
405 * The Book3s_64 inventors also realized this case and implemented a special bit
406 * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
407 *
408 * My approach here is to patch the dcbz instruction on executing pages.
409 */
410static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
411{
9fb244a2
AG		 412 struct page *hpage;
413 u64 hpage_offset;
2f4cf5e4
AG		 414 u32 *page;
415 int i;
416
9fb244a2
AG		 417 hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
418 if (is_error_page(hpage))
2f4cf5e4
AG		 419 return;
420
9fb244a2
AG		 421 hpage_offset = pte->raddr & ~PAGE_MASK;
422 hpage_offset &= ~0xFFFULL;
423 hpage_offset /= 4;
2f4cf5e4 424
9fb244a2
AG		 425 get_page(hpage);
426 page = kmap_atomic(hpage, KM_USER0);
2f4cf5e4 427
9fb244a2
AG		 428 /* patch dcbz into reserved instruction, so we trap */
429 for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++)
430 if ((page[i] & 0xff0007ff) == INS_DCBZ)
431 page[i] &= 0xfffffff7;
2f4cf5e4 432
9fb244a2
AG		 433 kunmap_atomic(page, KM_USER0);
434 put_page(hpage);
2f4cf5e4
AG		 435}
436
437static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
438 struct kvmppc_pte *pte)
439{
666e7252 440 int relocated = (vcpu->arch.shared->msr & (data ? MSR_DR : MSR_IR));
2f4cf5e4
AG		 441 int r;
442
443 if (relocated) {
444 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data);
445 } else {
446 pte->eaddr = eaddr;
447 pte->raddr = eaddr & 0xffffffff;
3eeafd7d 448 pte->vpage = VSID_REAL | eaddr >> 12;
2f4cf5e4
AG		 449 pte->may_read = true;
450 pte->may_write = true;
451 pte->may_execute = true;
452 r = 0;
453 }
454
455 return r;
456}
457
458static hva_t kvmppc_bad_hva(void)
459{
460 return PAGE_OFFSET;
461}
462
463static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
464 bool read)
465{
466 hva_t hpage;
467
468 if (read && !pte->may_read)
469 goto err;
470
471 if (!read && !pte->may_write)
472 goto err;
473
474 hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
475 if (kvm_is_error_hva(hpage))
476 goto err;
477
478 return hpage | (pte->raddr & ~PAGE_MASK);
479err:
480 return kvmppc_bad_hva();
481}
482
5467a97d
AG		 483int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
484 bool data)
2f4cf5e4
AG		 485{
486 struct kvmppc_pte pte;
2f4cf5e4
AG		 487
488 vcpu->stat.st++;
489
5467a97d 490 if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
9fb244a2 491 return -ENOENT;
5467a97d
AG		 492
493 *eaddr = pte.raddr;
2f4cf5e4 494
9fb244a2
AG		 495 if (!pte.may_write)
496 return -EPERM;
2f4cf5e4 497
9fb244a2
AG		 498 if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
499 return EMULATE_DO_MMIO;
2f4cf5e4 500
5467a97d 501 return EMULATE_DONE;
2f4cf5e4
AG		 502}
503
5467a97d 504int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
2f4cf5e4
AG		 505 bool data)
506{
507 struct kvmppc_pte pte;
5467a97d 508 hva_t hva = *eaddr;
2f4cf5e4
AG		 509
510 vcpu->stat.ld++;
511
5467a97d
AG		 512 if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
513 goto nopte;
514
515 *eaddr = pte.raddr;
2f4cf5e4
AG		 516
517 hva = kvmppc_pte_to_hva(vcpu, &pte, true);
518 if (kvm_is_error_hva(hva))
5467a97d 519 goto mmio;
2f4cf5e4
AG		 520
521 if (copy_from_user(ptr, (void __user *)hva, size)) {
522 printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
5467a97d 523 goto mmio;
2f4cf5e4
AG		 524 }
525
5467a97d 526 return EMULATE_DONE;
2f4cf5e4 527
5467a97d 528nopte:
2f4cf5e4 529 return -ENOENT;
5467a97d
AG		 530mmio:
531 return EMULATE_DO_MMIO;
2f4cf5e4
AG		 532}
533
534static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
535{
536 return kvm_is_visible_gfn(vcpu->kvm, gfn);
537}
538
539int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
540 ulong eaddr, int vec)
541{
542 bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
543 int r = RESUME_GUEST;
544 int relocated;
545 int page_found = 0;
546 struct kvmppc_pte pte;
547 bool is_mmio = false;
666e7252
AG		 548 bool dr = (vcpu->arch.shared->msr & MSR_DR) ? true : false;
549 bool ir = (vcpu->arch.shared->msr & MSR_IR) ? true : false;
f7bc74e1 550 u64 vsid;
2f4cf5e4 551
3eeafd7d 552 relocated = data ? dr : ir;
2f4cf5e4
AG		 553
554 /* Resolve real address if translation turned on */
555 if (relocated) {
556 page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data);
557 } else {
558 pte.may_execute = true;
559 pte.may_read = true;
560 pte.may_write = true;
561 pte.raddr = eaddr & 0xffffffff;
562 pte.eaddr = eaddr;
563 pte.vpage = eaddr >> 12;
3eeafd7d
AG		 564 }
565
666e7252 566 switch (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) {
3eeafd7d 567 case 0:
f7bc74e1 568 pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
3eeafd7d
AG		 569 break;
570 case MSR_DR:
3eeafd7d 571 case MSR_IR:
f7bc74e1
AG		 572 vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
573
666e7252 574 if ((vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) == MSR_DR)
f7bc74e1
AG		 575 pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
576 else
577 pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
578 pte.vpage |= vsid;
579
580 if (vsid == -1)
581 page_found = -EINVAL;
3eeafd7d 582 break;
2f4cf5e4
AG		 583 }
584
585 if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
586 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
587 /*
588 * If we do the dcbz hack, we have to NX on every execution,
589 * so we can patch the executing code. This renders our guest
590 * NX-less.
591 */
592 pte.may_execute = !data;
593 }
594
595 if (page_found == -ENOENT) {
596 /* Page not found in guest PTE entries */
5e030186 597 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
d562de48 598 vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
666e7252
AG		 599 vcpu->arch.shared->msr |=
600 (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
2f4cf5e4
AG		 601 kvmppc_book3s_queue_irqprio(vcpu, vec);
602 } else if (page_found == -EPERM) {
603 /* Storage protection */
5e030186 604 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
d562de48
AG		 605 vcpu->arch.shared->dsisr =
606 to_svcpu(vcpu)->fault_dsisr & ~DSISR_NOHPTE;
607 vcpu->arch.shared->dsisr |= DSISR_PROTFAULT;
666e7252
AG		 608 vcpu->arch.shared->msr |=
609 (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
2f4cf5e4
AG		 610 kvmppc_book3s_queue_irqprio(vcpu, vec);
611 } else if (page_found == -EINVAL) {
612 /* Page not found in guest SLB */
5e030186 613 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
2f4cf5e4
AG		 614 kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
615 } else if (!is_mmio &&
616 kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) {
617 /* The guest's PTE is not mapped yet. Map on the host */
618 kvmppc_mmu_map_page(vcpu, &pte);
619 if (data)
620 vcpu->stat.sp_storage++;
621 else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
622 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
623 kvmppc_patch_dcbz(vcpu, &pte);
624 } else {
625 /* MMIO */
626 vcpu->stat.mmio_exits++;
627 vcpu->arch.paddr_accessed = pte.raddr;
628 r = kvmppc_emulate_mmio(run, vcpu);
629 if ( r == RESUME_HOST_NV )
630 r = RESUME_HOST;
2f4cf5e4
AG		 631 }
632
633 return r;
634}
635
180a34d2
AG		 636static inline int get_fpr_index(int i)
637{
638#ifdef CONFIG_VSX
639 i *= 2;
640#endif
641 return i;
642}
643
644/* Give up external provider (FPU, Altivec, VSX) */
aba3bd7f 645void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
180a34d2
AG		 646{
647 struct thread_struct *t = &current->thread;
648 u64 *vcpu_fpr = vcpu->arch.fpr;
a2b07664 649#ifdef CONFIG_VSX
180a34d2 650 u64 *vcpu_vsx = vcpu->arch.vsr;
a2b07664 651#endif
180a34d2
AG		 652 u64 *thread_fpr = (u64*)t->fpr;
653 int i;
654
655 if (!(vcpu->arch.guest_owned_ext & msr))
656 return;
657
658#ifdef DEBUG_EXT
659 printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
660#endif
661
662 switch (msr) {
663 case MSR_FP:
664 giveup_fpu(current);
665 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
666 vcpu_fpr[i] = thread_fpr[get_fpr_index(i)];
667
668 vcpu->arch.fpscr = t->fpscr.val;
669 break;
670 case MSR_VEC:
671#ifdef CONFIG_ALTIVEC
672 giveup_altivec(current);
673 memcpy(vcpu->arch.vr, t->vr, sizeof(vcpu->arch.vr));
674 vcpu->arch.vscr = t->vscr;
675#endif
676 break;
677 case MSR_VSX:
678#ifdef CONFIG_VSX
679 __giveup_vsx(current);
680 for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
681 vcpu_vsx[i] = thread_fpr[get_fpr_index(i) + 1];
682#endif
683 break;
684 default:
685 BUG();
686 }
687
688 vcpu->arch.guest_owned_ext &= ~msr;
689 current->thread.regs->msr &= ~msr;
a76f8497 690 kvmppc_recalc_shadow_msr(vcpu);
180a34d2
AG		 691}
692
8963221d 693static int kvmppc_read_inst(struct kvm_vcpu *vcpu)
c8c0b6f2 694{
c7f38f46
AG		 695 ulong srr0 = kvmppc_get_pc(vcpu);
696 u32 last_inst = kvmppc_get_last_inst(vcpu);
c8c0b6f2
AG		 697 int ret;
698
c7f38f46 699 ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false);
c8c0b6f2 700 if (ret == -ENOENT) {
666e7252
AG		 701 ulong msr = vcpu->arch.shared->msr;
702
703 msr = kvmppc_set_field(msr, 33, 33, 1);
704 msr = kvmppc_set_field(msr, 34, 36, 0);
705 vcpu->arch.shared->msr = kvmppc_set_field(msr, 42, 47, 0);
c8c0b6f2 706 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
8963221d
AG		 707 return EMULATE_AGAIN;
708 }
709
710 return EMULATE_DONE;
711}
712
713static int kvmppc_check_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr)
714{
715
716 /* Need to do paired single emulation? */
717 if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
718 return EMULATE_DONE;
719
720 /* Read out the instruction */
721 if (kvmppc_read_inst(vcpu) == EMULATE_DONE)
c8c0b6f2
AG		 722 /* Need to emulate */
723 return EMULATE_FAIL;
c8c0b6f2
AG		 724
725 return EMULATE_AGAIN;
726}
727
180a34d2
AG		 728/* Handle external providers (FPU, Altivec, VSX) */
729static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
730 ulong msr)
731{
732 struct thread_struct *t = &current->thread;
733 u64 *vcpu_fpr = vcpu->arch.fpr;
a2b07664 734#ifdef CONFIG_VSX
180a34d2 735 u64 *vcpu_vsx = vcpu->arch.vsr;
a2b07664 736#endif
180a34d2
AG		 737 u64 *thread_fpr = (u64*)t->fpr;
738 int i;
739
3c402a75
AG		 740 /* When we have paired singles, we emulate in software */
741 if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
742 return RESUME_GUEST;
743
666e7252 744 if (!(vcpu->arch.shared->msr & msr)) {
180a34d2
AG		 745 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
746 return RESUME_GUEST;
747 }
748
c2453693
AG		 749 /* We already own the ext */
750 if (vcpu->arch.guest_owned_ext & msr) {
751 return RESUME_GUEST;
752 }
753
180a34d2
AG		 754#ifdef DEBUG_EXT
755 printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
756#endif
757
758 current->thread.regs->msr |= msr;
759
760 switch (msr) {
761 case MSR_FP:
762 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
763 thread_fpr[get_fpr_index(i)] = vcpu_fpr[i];
764
765 t->fpscr.val = vcpu->arch.fpscr;
766 t->fpexc_mode = 0;
767 kvmppc_load_up_fpu();
768 break;
769 case MSR_VEC:
770#ifdef CONFIG_ALTIVEC
771 memcpy(t->vr, vcpu->arch.vr, sizeof(vcpu->arch.vr));
772 t->vscr = vcpu->arch.vscr;
773 t->vrsave = -1;
774 kvmppc_load_up_altivec();
775#endif
776 break;
777 case MSR_VSX:
778#ifdef CONFIG_VSX
779 for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
780 thread_fpr[get_fpr_index(i) + 1] = vcpu_vsx[i];
781 kvmppc_load_up_vsx();
782#endif
783 break;
784 default:
785 BUG();
786 }
787
788 vcpu->arch.guest_owned_ext |= msr;
789
a76f8497 790 kvmppc_recalc_shadow_msr(vcpu);
180a34d2
AG		 791
792 return RESUME_GUEST;
793}
794
2f4cf5e4
AG		 795int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
796 unsigned int exit_nr)
797{
798 int r = RESUME_HOST;
799
800 vcpu->stat.sum_exits++;
801
802 run->exit_reason = KVM_EXIT_UNKNOWN;
803 run->ready_for_interrupt_injection = 1;
804#ifdef EXIT_DEBUG
805 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | dec=0x%x | msr=0x%lx\n",
c7f38f46
AG		 806 exit_nr, kvmppc_get_pc(vcpu), kvmppc_get_fault_dar(vcpu),
807 kvmppc_get_dec(vcpu), to_svcpu(vcpu)->shadow_srr1);
2f4cf5e4
AG		 808#elif defined (EXIT_DEBUG_SIMPLE)
809 if ((exit_nr != 0x900) && (exit_nr != 0x500))
810 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | msr=0x%lx\n",
c7f38f46 811 exit_nr, kvmppc_get_pc(vcpu), kvmppc_get_fault_dar(vcpu),
666e7252 812 vcpu->arch.shared->msr);
2f4cf5e4
AG		 813#endif
814 kvm_resched(vcpu);
815 switch (exit_nr) {
816 case BOOK3S_INTERRUPT_INST_STORAGE:
817 vcpu->stat.pf_instruc++;
61db97cc
AG		 818
819#ifdef CONFIG_PPC_BOOK3S_32
820 /* We set segments as unused segments when invalidating them. So
821 * treat the respective fault as segment fault. */
822 if (to_svcpu(vcpu)->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT]
823 == SR_INVALID) {
824 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
825 r = RESUME_GUEST;
826 break;
827 }
828#endif
829
2f4cf5e4 830 /* only care about PTEG not found errors, but leave NX alone */
c7f38f46
AG		 831 if (to_svcpu(vcpu)->shadow_srr1 & 0x40000000) {
832 r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
2f4cf5e4
AG		 833 vcpu->stat.sp_instruc++;
834 } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
835 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
836 /*
837 * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
838 * so we can't use the NX bit inside the guest. Let's cross our fingers,
839 * that no guest that needs the dcbz hack does NX.
840 */
af7b4d10 841 kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
9fb244a2 842 r = RESUME_GUEST;
2f4cf5e4 843 } else {
666e7252
AG		 844 vcpu->arch.shared->msr |=
845 to_svcpu(vcpu)->shadow_srr1 & 0x58000000;
2f4cf5e4 846 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
af7b4d10 847 kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
2f4cf5e4
AG		 848 r = RESUME_GUEST;
849 }
850 break;
851 case BOOK3S_INTERRUPT_DATA_STORAGE:
c7f38f46
AG		 852 {
853 ulong dar = kvmppc_get_fault_dar(vcpu);
2f4cf5e4 854 vcpu->stat.pf_storage++;
61db97cc
AG		 855
856#ifdef CONFIG_PPC_BOOK3S_32
857 /* We set segments as unused segments when invalidating them. So
858 * treat the respective fault as segment fault. */
859 if ((to_svcpu(vcpu)->sr[dar >> SID_SHIFT]) == SR_INVALID) {
860 kvmppc_mmu_map_segment(vcpu, dar);
861 r = RESUME_GUEST;
862 break;
863 }
864#endif
865
2f4cf5e4 866 /* The only case we need to handle is missing shadow PTEs */
c7f38f46
AG		 867 if (to_svcpu(vcpu)->fault_dsisr & DSISR_NOHPTE) {
868 r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
2f4cf5e4 869 } else {
5e030186 870 vcpu->arch.shared->dar = dar;
d562de48 871 vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
2f4cf5e4 872 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
5e030186 873 kvmppc_mmu_pte_flush(vcpu, dar, ~0xFFFUL);
2f4cf5e4
AG		 874 r = RESUME_GUEST;
875 }
876 break;
c7f38f46 877 }
2f4cf5e4 878 case BOOK3S_INTERRUPT_DATA_SEGMENT:
c7f38f46 879 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
5e030186 880 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
2f4cf5e4
AG		 881 kvmppc_book3s_queue_irqprio(vcpu,
882 BOOK3S_INTERRUPT_DATA_SEGMENT);
883 }
884 r = RESUME_GUEST;
885 break;
886 case BOOK3S_INTERRUPT_INST_SEGMENT:
c7f38f46 887 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
2f4cf5e4
AG		 888 kvmppc_book3s_queue_irqprio(vcpu,
889 BOOK3S_INTERRUPT_INST_SEGMENT);
890 }
891 r = RESUME_GUEST;
892 break;
893 /* We're good on these - the host merely wanted to get our attention */
894 case BOOK3S_INTERRUPT_DECREMENTER:
895 vcpu->stat.dec_exits++;
896 r = RESUME_GUEST;
897 break;
898 case BOOK3S_INTERRUPT_EXTERNAL:
899 vcpu->stat.ext_intr_exits++;
900 r = RESUME_GUEST;
901 break;
7fdaec99
AG		 902 case BOOK3S_INTERRUPT_PERFMON:
903 r = RESUME_GUEST;
904 break;
2f4cf5e4
AG		 905 case BOOK3S_INTERRUPT_PROGRAM:
906 {
907 enum emulation_result er;
ff1ca3f9
AG		 908 ulong flags;
909
c8c0b6f2 910program_interrupt:
c7f38f46 911 flags = to_svcpu(vcpu)->shadow_srr1 & 0x1f0000ull;
2f4cf5e4 912
666e7252 913 if (vcpu->arch.shared->msr & MSR_PR) {
2f4cf5e4 914#ifdef EXIT_DEBUG
c7f38f46 915 printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
2f4cf5e4 916#endif
c7f38f46 917 if ((kvmppc_get_last_inst(vcpu) & 0xff0007ff) !=
2f4cf5e4 918 (INS_DCBZ & 0xfffffff7)) {
ff1ca3f9 919 kvmppc_core_queue_program(vcpu, flags);
2f4cf5e4
AG		 920 r = RESUME_GUEST;
921 break;
922 }
923 }
924
925 vcpu->stat.emulated_inst_exits++;
926 er = kvmppc_emulate_instruction(run, vcpu);
927 switch (er) {
928 case EMULATE_DONE:
97c4cfbe 929 r = RESUME_GUEST_NV;
2f4cf5e4 930 break;
37f5bca6
AG		 931 case EMULATE_AGAIN:
932 r = RESUME_GUEST;
933 break;
2f4cf5e4
AG		 934 case EMULATE_FAIL:
935 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
c7f38f46 936 __func__, kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
ff1ca3f9 937 kvmppc_core_queue_program(vcpu, flags);
2f4cf5e4
AG		 938 r = RESUME_GUEST;
939 break;
e5c29e92
AG		 940 case EMULATE_DO_MMIO:
941 run->exit_reason = KVM_EXIT_MMIO;
942 r = RESUME_HOST_NV;
943 break;
2f4cf5e4
AG		 944 default:
945 BUG();
946 }
947 break;
948 }
949 case BOOK3S_INTERRUPT_SYSCALL:
ad0a048b
AG		 950 if (vcpu->arch.osi_enabled &&
951 (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
952 (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
2a342ed5 953 /* MOL hypercalls */
ad0a048b
AG		 954 u64 *gprs = run->osi.gprs;
955 int i;
956
957 run->exit_reason = KVM_EXIT_OSI;
958 for (i = 0; i < 32; i++)
959 gprs[i] = kvmppc_get_gpr(vcpu, i);
960 vcpu->arch.osi_needed = 1;
961 r = RESUME_HOST_NV;
2a342ed5
AG		 962 } else if (!(vcpu->arch.shared->msr & MSR_PR) &&
963 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
964 /* KVM PV hypercalls */
965 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
966 r = RESUME_GUEST;
ad0a048b 967 } else {
2a342ed5 968 /* Guest syscalls */
ad0a048b
AG		 969 vcpu->stat.syscall_exits++;
970 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
971 r = RESUME_GUEST;
972 }
2f4cf5e4 973 break;
2f4cf5e4 974 case BOOK3S_INTERRUPT_FP_UNAVAIL:
2f4cf5e4
AG		 975 case BOOK3S_INTERRUPT_ALTIVEC:
976 case BOOK3S_INTERRUPT_VSX:
c8c0b6f2
AG		 977 {
978 int ext_msr = 0;
979
980 switch (exit_nr) {
981 case BOOK3S_INTERRUPT_FP_UNAVAIL: ext_msr = MSR_FP; break;
982 case BOOK3S_INTERRUPT_ALTIVEC: ext_msr = MSR_VEC; break;
983 case BOOK3S_INTERRUPT_VSX: ext_msr = MSR_VSX; break;
984 }
985
986 switch (kvmppc_check_ext(vcpu, exit_nr)) {
987 case EMULATE_DONE:
988 /* everything ok - let's enable the ext */
989 r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
990 break;
991 case EMULATE_FAIL:
992 /* we need to emulate this instruction */
993 goto program_interrupt;
994 break;
995 default:
996 /* nothing to worry about - go again */
997 break;
998 }
180a34d2 999 break;
c8c0b6f2 1000 }
ca7f4203
AG		 1001 case BOOK3S_INTERRUPT_ALIGNMENT:
1002 if (kvmppc_read_inst(vcpu) == EMULATE_DONE) {
d562de48 1003 vcpu->arch.shared->dsisr = kvmppc_alignment_dsisr(vcpu,
c7f38f46 1004 kvmppc_get_last_inst(vcpu));
5e030186 1005 vcpu->arch.shared->dar = kvmppc_alignment_dar(vcpu,
c7f38f46 1006 kvmppc_get_last_inst(vcpu));
ca7f4203
AG		 1007 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1008 }
1009 r = RESUME_GUEST;
1010 break;
180a34d2
AG		 1011 case BOOK3S_INTERRUPT_MACHINE_CHECK:
1012 case BOOK3S_INTERRUPT_TRACE:
2f4cf5e4
AG		 1013 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1014 r = RESUME_GUEST;
1015 break;
1016 default:
1017 /* Ugh - bork here! What did we get? */
f7adbba1 1018 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
c7f38f46 1019 exit_nr, kvmppc_get_pc(vcpu), to_svcpu(vcpu)->shadow_srr1);
2f4cf5e4
AG		 1020 r = RESUME_HOST;
1021 BUG();
1022 break;
1023 }
1024
1025
1026 if (!(r & RESUME_HOST)) {
1027 /* To avoid clobbering exit_reason, only check for signals if
1028 * we aren't already exiting to userspace for some other
1029 * reason. */
1030 if (signal_pending(current)) {
1031#ifdef EXIT_DEBUG
1032 printk(KERN_EMERG "KVM: Going back to host\n");
1033#endif
1034 vcpu->stat.signal_exits++;
1035 run->exit_reason = KVM_EXIT_INTR;
1036 r = -EINTR;
1037 } else {
1038 /* In case an interrupt came in that was triggered
1039 * from userspace (like DEC), we need to check what
1040 * to inject now! */
1041 kvmppc_core_deliver_interrupts(vcpu);
1042 }
1043 }
1044
1045#ifdef EXIT_DEBUG
c7f38f46 1046 printk(KERN_EMERG "KVM exit: vcpu=0x%p pc=0x%lx r=0x%x\n", vcpu, kvmppc_get_pc(vcpu), r);
2f4cf5e4
AG		 1047#endif
1048
1049 return r;
1050}
1051
1052int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1053{
1054 return 0;
1055}
1056
1057int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1058{
1059 int i;
1060
c7f38f46 1061 regs->pc = kvmppc_get_pc(vcpu);
992b5b29 1062 regs->cr = kvmppc_get_cr(vcpu);
c7f38f46
AG		 1063 regs->ctr = kvmppc_get_ctr(vcpu);
1064 regs->lr = kvmppc_get_lr(vcpu);
992b5b29 1065 regs->xer = kvmppc_get_xer(vcpu);
666e7252 1066 regs->msr = vcpu->arch.shared->msr;
de7906c3
AG		 1067 regs->srr0 = vcpu->arch.shared->srr0;
1068 regs->srr1 = vcpu->arch.shared->srr1;
2f4cf5e4 1069 regs->pid = vcpu->arch.pid;
a73a9599
AG		 1070 regs->sprg0 = vcpu->arch.shared->sprg0;
1071 regs->sprg1 = vcpu->arch.shared->sprg1;
1072 regs->sprg2 = vcpu->arch.shared->sprg2;
1073 regs->sprg3 = vcpu->arch.shared->sprg3;
2f4cf5e4
AG		 1074 regs->sprg5 = vcpu->arch.sprg4;
1075 regs->sprg6 = vcpu->arch.sprg5;
1076 regs->sprg7 = vcpu->arch.sprg6;
1077
1078 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
8e5b26b5 1079 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
2f4cf5e4
AG		 1080
1081 return 0;
1082}
1083
1084int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1085{
1086 int i;
1087
c7f38f46 1088 kvmppc_set_pc(vcpu, regs->pc);
992b5b29 1089 kvmppc_set_cr(vcpu, regs->cr);
c7f38f46
AG		 1090 kvmppc_set_ctr(vcpu, regs->ctr);
1091 kvmppc_set_lr(vcpu, regs->lr);
992b5b29 1092 kvmppc_set_xer(vcpu, regs->xer);
2f4cf5e4 1093 kvmppc_set_msr(vcpu, regs->msr);
de7906c3
AG		 1094 vcpu->arch.shared->srr0 = regs->srr0;
1095 vcpu->arch.shared->srr1 = regs->srr1;
a73a9599
AG		 1096 vcpu->arch.shared->sprg0 = regs->sprg0;
1097 vcpu->arch.shared->sprg1 = regs->sprg1;
1098 vcpu->arch.shared->sprg2 = regs->sprg2;
1099 vcpu->arch.shared->sprg3 = regs->sprg3;
2f4cf5e4
AG		 1100 vcpu->arch.sprg5 = regs->sprg4;
1101 vcpu->arch.sprg6 = regs->sprg5;
1102 vcpu->arch.sprg7 = regs->sprg6;
1103
8e5b26b5
AG		 1104 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1105 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
2f4cf5e4
AG		 1106
1107 return 0;
1108}
1109
1110int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1111 struct kvm_sregs *sregs)
1112{
e15a1137
AG		 1113 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1114 int i;
1115
2f4cf5e4 1116 sregs->pvr = vcpu->arch.pvr;
e15a1137
AG		 1117
1118 sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
1119 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1120 for (i = 0; i < 64; i++) {
1121 sregs->u.s.ppc64.slb[i].slbe = vcpu3s->slb[i].orige | i;
1122 sregs->u.s.ppc64.slb[i].slbv = vcpu3s->slb[i].origv;
1123 }
1124 } else {
1125 for (i = 0; i < 16; i++) {
1126 sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw;
1127 sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw;
1128 }
1129 for (i = 0; i < 8; i++) {
1130 sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
1131 sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
1132 }
1133 }
98001d8d 1134
2f4cf5e4
AG		 1135 return 0;
1136}
1137
1138int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1139 struct kvm_sregs *sregs)
1140{
e15a1137
AG		 1141 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1142 int i;
1143
2f4cf5e4 1144 kvmppc_set_pvr(vcpu, sregs->pvr);
e15a1137
AG		 1145
1146 vcpu3s->sdr1 = sregs->u.s.sdr1;
1147 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1148 for (i = 0; i < 64; i++) {
1149 vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv,
1150 sregs->u.s.ppc64.slb[i].slbe);
1151 }
1152 } else {
1153 for (i = 0; i < 16; i++) {
1154 vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
1155 }
1156 for (i = 0; i < 8; i++) {
1157 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
1158 (u32)sregs->u.s.ppc32.ibat[i]);
1159 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
1160 (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
1161 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
1162 (u32)sregs->u.s.ppc32.dbat[i]);
1163 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
1164 (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
1165 }
1166 }
1167
1168 /* Flush the MMU after messing with the segments */
1169 kvmppc_mmu_pte_flush(vcpu, 0, 0);
98001d8d 1170
2f4cf5e4
AG		 1171 return 0;
1172}
1173
1174int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1175{
1176 return -ENOTSUPP;
1177}
1178
1179int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1180{
1181 return -ENOTSUPP;
1182}
1183
1184int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1185 struct kvm_translation *tr)
1186{
1187 return 0;
1188}
1189
1190/*
1191 * Get (and clear) the dirty memory log for a memory slot.
1192 */
1193int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1194 struct kvm_dirty_log *log)
1195{
1196 struct kvm_memory_slot *memslot;
1197 struct kvm_vcpu *vcpu;
1198 ulong ga, ga_end;
1199 int is_dirty = 0;
87bf6e7d
TY		 1200 int r;
1201 unsigned long n;
2f4cf5e4 1202
79fac95e 1203 mutex_lock(&kvm->slots_lock);
2f4cf5e4
AG		 1204
1205 r = kvm_get_dirty_log(kvm, log, &is_dirty);
1206 if (r)
1207 goto out;
1208
1209 /* If nothing is dirty, don't bother messing with page tables. */
1210 if (is_dirty) {
46a26bf5 1211 memslot = &kvm->memslots->memslots[log->slot];
2f4cf5e4
AG		 1212
1213 ga = memslot->base_gfn << PAGE_SHIFT;
1214 ga_end = ga + (memslot->npages << PAGE_SHIFT);
1215
1216 kvm_for_each_vcpu(n, vcpu, kvm)
1217 kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
1218
87bf6e7d 1219 n = kvm_dirty_bitmap_bytes(memslot);
2f4cf5e4
AG		 1220 memset(memslot->dirty_bitmap, 0, n);
1221 }
1222
1223 r = 0;
1224out:
79fac95e 1225 mutex_unlock(&kvm->slots_lock);
2f4cf5e4
AG		 1226 return r;
1227}
1228
1229int kvmppc_core_check_processor_compat(void)
1230{
1231 return 0;
1232}
1233
1234struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
1235{
1236 struct kvmppc_vcpu_book3s *vcpu_book3s;
1237 struct kvm_vcpu *vcpu;
c7f38f46 1238 int err = -ENOMEM;
2f4cf5e4 1239
032c3407 1240 vcpu_book3s = vmalloc(sizeof(struct kvmppc_vcpu_book3s));
c7f38f46 1241 if (!vcpu_book3s)
2f4cf5e4 1242 goto out;
c7f38f46 1243
7e821d39 1244 memset(vcpu_book3s, 0, sizeof(struct kvmppc_vcpu_book3s));
2f4cf5e4 1245
c7f38f46
AG		 1246 vcpu_book3s->shadow_vcpu = (struct kvmppc_book3s_shadow_vcpu *)
1247 kzalloc(sizeof(*vcpu_book3s->shadow_vcpu), GFP_KERNEL);
1248 if (!vcpu_book3s->shadow_vcpu)
1249 goto free_vcpu;
1250
2f4cf5e4
AG		 1251 vcpu = &vcpu_book3s->vcpu;
1252 err = kvm_vcpu_init(vcpu, kvm, id);
1253 if (err)
c7f38f46 1254 goto free_shadow_vcpu;
2f4cf5e4 1255
96bc451a
AG		 1256 vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO);
1257 if (!vcpu->arch.shared)
1258 goto uninit_vcpu;
1259
2f4cf5e4
AG		 1260 vcpu->arch.host_retip = kvm_return_point;
1261 vcpu->arch.host_msr = mfmsr();
07b0907d 1262#ifdef CONFIG_PPC_BOOK3S_64
2f4cf5e4
AG		 1263 /* default to book3s_64 (970fx) */
1264 vcpu->arch.pvr = 0x3C0301;
07b0907d
AG		 1265#else
1266 /* default to book3s_32 (750) */
1267 vcpu->arch.pvr = 0x84202;
1268#endif
2f4cf5e4
AG		 1269 kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
1270 vcpu_book3s->slb_nr = 64;
1271
1272 /* remember where some real-mode handlers are */
1273 vcpu->arch.trampoline_lowmem = kvmppc_trampoline_lowmem;
1274 vcpu->arch.trampoline_enter = kvmppc_trampoline_enter;
1275 vcpu->arch.highmem_handler = (ulong)kvmppc_handler_highmem;
07b0907d 1276#ifdef CONFIG_PPC_BOOK3S_64
021ec9c6 1277 vcpu->arch.rmcall = *(ulong*)kvmppc_rmcall;
07b0907d
AG		 1278#else
1279 vcpu->arch.rmcall = (ulong)kvmppc_rmcall;
1280#endif
2f4cf5e4
AG		 1281
1282 vcpu->arch.shadow_msr = MSR_USER64;
1283
9cc5e953 1284 err = kvmppc_mmu_init(vcpu);
2f4cf5e4 1285 if (err < 0)
96bc451a 1286 goto uninit_vcpu;
2f4cf5e4
AG		 1287
1288 return vcpu;
1289
96bc451a
AG		 1290uninit_vcpu:
1291 kvm_vcpu_uninit(vcpu);
c7f38f46
AG		 1292free_shadow_vcpu:
1293 kfree(vcpu_book3s->shadow_vcpu);
2f4cf5e4 1294free_vcpu:
032c3407 1295 vfree(vcpu_book3s);
2f4cf5e4
AG		 1296out:
1297 return ERR_PTR(err);
1298}
1299
1300void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
1301{
1302 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
1303
96bc451a 1304 free_page((unsigned long)vcpu->arch.shared);
2f4cf5e4 1305 kvm_vcpu_uninit(vcpu);
c7f38f46 1306 kfree(vcpu_book3s->shadow_vcpu);
032c3407 1307 vfree(vcpu_book3s);
2f4cf5e4
AG		 1308}
1309
1310extern int __kvmppc_vcpu_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
1311int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
1312{
1313 int ret;
49f6be8e
AS		 1314 double fpr[32][TS_FPRWIDTH];
1315 unsigned int fpscr;
1316 int fpexc_mode;
a2b07664 1317#ifdef CONFIG_ALTIVEC
49f6be8e
AS		 1318 vector128 vr[32];
1319 vector128 vscr;
1320 unsigned long uninitialized_var(vrsave);
1321 int used_vr;
a2b07664
AG		 1322#endif
1323#ifdef CONFIG_VSX
49f6be8e 1324 int used_vsr;
a2b07664 1325#endif
180a34d2 1326 ulong ext_msr;
2f4cf5e4
AG		 1327
1328 /* No need to go into the guest when all we do is going out */
1329 if (signal_pending(current)) {
1330 kvm_run->exit_reason = KVM_EXIT_INTR;
1331 return -EINTR;
1332 }
1333
180a34d2
AG		 1334 /* Save FPU state in stack */
1335 if (current->thread.regs->msr & MSR_FP)
1336 giveup_fpu(current);
49f6be8e
AS		 1337 memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
1338 fpscr = current->thread.fpscr.val;
1339 fpexc_mode = current->thread.fpexc_mode;
180a34d2
AG		 1340
1341#ifdef CONFIG_ALTIVEC
1342 /* Save Altivec state in stack */
49f6be8e
AS		 1343 used_vr = current->thread.used_vr;
1344 if (used_vr) {
180a34d2
AG		 1345 if (current->thread.regs->msr & MSR_VEC)
1346 giveup_altivec(current);
49f6be8e
AS		 1347 memcpy(vr, current->thread.vr, sizeof(current->thread.vr));
1348 vscr = current->thread.vscr;
1349 vrsave = current->thread.vrsave;
180a34d2 1350 }
180a34d2
AG		 1351#endif
1352
1353#ifdef CONFIG_VSX
1354 /* Save VSX state in stack */
49f6be8e
AS		 1355 used_vsr = current->thread.used_vsr;
1356 if (used_vsr && (current->thread.regs->msr & MSR_VSX))
180a34d2 1357 __giveup_vsx(current);
180a34d2
AG		 1358#endif
1359
1360 /* Remember the MSR with disabled extensions */
1361 ext_msr = current->thread.regs->msr;
1362
2f4cf5e4
AG		 1363 /* XXX we get called with irq disabled - change that! */
1364 local_irq_enable();
1365
d1bab74c 1366 /* Preload FPU if it's enabled */
666e7252 1367 if (vcpu->arch.shared->msr & MSR_FP)
d1bab74c
AG		 1368 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
1369
2f4cf5e4
AG		 1370 ret = __kvmppc_vcpu_entry(kvm_run, vcpu);
1371
1372 local_irq_disable();
1373
180a34d2
AG		 1374 current->thread.regs->msr = ext_msr;
1375
1376 /* Make sure we save the guest FPU/Altivec/VSX state */
1377 kvmppc_giveup_ext(vcpu, MSR_FP);
1378 kvmppc_giveup_ext(vcpu, MSR_VEC);
1379 kvmppc_giveup_ext(vcpu, MSR_VSX);
1380
1381 /* Restore FPU state from stack */
49f6be8e
AS		 1382 memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
1383 current->thread.fpscr.val = fpscr;
1384 current->thread.fpexc_mode = fpexc_mode;
180a34d2
AG		 1385
1386#ifdef CONFIG_ALTIVEC
1387 /* Restore Altivec state from stack */
49f6be8e
AS		 1388 if (used_vr && current->thread.used_vr) {
1389 memcpy(current->thread.vr, vr, sizeof(current->thread.vr));
1390 current->thread.vscr = vscr;
1391 current->thread.vrsave = vrsave;
180a34d2 1392 }
49f6be8e 1393 current->thread.used_vr = used_vr;
180a34d2
AG		 1394#endif
1395
1396#ifdef CONFIG_VSX
49f6be8e 1397 current->thread.used_vsr = used_vsr;
180a34d2
AG		 1398#endif
1399
2f4cf5e4
AG		 1400 return ret;
1401}
1402
1403static int kvmppc_book3s_init(void)
1404{
fef093be
AG		 1405 int r;
1406
1407 r = kvm_init(NULL, sizeof(struct kvmppc_vcpu_book3s), 0,
1408 THIS_MODULE);
1409
1410 if (r)
1411 return r;
1412
1413 r = kvmppc_mmu_hpte_sysinit();
1414
1415 return r;
2f4cf5e4
AG		 1416}
1417
1418static void kvmppc_book3s_exit(void)
1419{
fef093be 1420 kvmppc_mmu_hpte_sysexit();
2f4cf5e4
AG		 1421 kvm_exit();
1422}
1423
1424module_init(kvmppc_book3s_init);
1425module_exit(kvmppc_book3s_exit);
Ubuntu Jammy Linux kernel mirror