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KVM: PPC: Tell guest about pending interrupts
[mirror_ubuntu-bionic-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;
5c6cedf4
AG		 254 ulong crit_raw = vcpu->arch.shared->critical;
255 ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
256 bool crit;
257
258 /* Truncate crit indicators in 32 bit mode */
259 if (!(vcpu->arch.shared->msr & MSR_SF)) {
260 crit_raw &= 0xffffffff;
261 crit_r1 &= 0xffffffff;
262 }
263
264 /* Critical section when crit == r1 */
265 crit = (crit_raw == crit_r1);
266 /* ... and we're in supervisor mode */
267 crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
2f4cf5e4
AG		 268
269 switch (priority) {
270 case BOOK3S_IRQPRIO_DECREMENTER:
5c6cedf4 271 deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
2f4cf5e4
AG		 272 vec = BOOK3S_INTERRUPT_DECREMENTER;
273 break;
274 case BOOK3S_IRQPRIO_EXTERNAL:
5c6cedf4 275 deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
2f4cf5e4
AG		 276 vec = BOOK3S_INTERRUPT_EXTERNAL;
277 break;
278 case BOOK3S_IRQPRIO_SYSTEM_RESET:
279 vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
280 break;
281 case BOOK3S_IRQPRIO_MACHINE_CHECK:
282 vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
283 break;
284 case BOOK3S_IRQPRIO_DATA_STORAGE:
285 vec = BOOK3S_INTERRUPT_DATA_STORAGE;
286 break;
287 case BOOK3S_IRQPRIO_INST_STORAGE:
288 vec = BOOK3S_INTERRUPT_INST_STORAGE;
289 break;
290 case BOOK3S_IRQPRIO_DATA_SEGMENT:
291 vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
292 break;
293 case BOOK3S_IRQPRIO_INST_SEGMENT:
294 vec = BOOK3S_INTERRUPT_INST_SEGMENT;
295 break;
296 case BOOK3S_IRQPRIO_ALIGNMENT:
297 vec = BOOK3S_INTERRUPT_ALIGNMENT;
298 break;
299 case BOOK3S_IRQPRIO_PROGRAM:
300 vec = BOOK3S_INTERRUPT_PROGRAM;
25a8a02d 301 flags = to_book3s(vcpu)->prog_flags;
2f4cf5e4
AG		 302 break;
303 case BOOK3S_IRQPRIO_VSX:
304 vec = BOOK3S_INTERRUPT_VSX;
305 break;
306 case BOOK3S_IRQPRIO_ALTIVEC:
307 vec = BOOK3S_INTERRUPT_ALTIVEC;
308 break;
309 case BOOK3S_IRQPRIO_FP_UNAVAIL:
310 vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
311 break;
312 case BOOK3S_IRQPRIO_SYSCALL:
313 vec = BOOK3S_INTERRUPT_SYSCALL;
314 break;
315 case BOOK3S_IRQPRIO_DEBUG:
316 vec = BOOK3S_INTERRUPT_TRACE;
317 break;
318 case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
319 vec = BOOK3S_INTERRUPT_PERFMON;
320 break;
321 default:
322 deliver = 0;
323 printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
324 break;
325 }
326
327#if 0
328 printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
329#endif
330
331 if (deliver)
25a8a02d 332 kvmppc_inject_interrupt(vcpu, vec, flags);
2f4cf5e4
AG		 333
334 return deliver;
335}
336
337void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
338{
339 unsigned long *pending = &vcpu->arch.pending_exceptions;
90bba358 340 unsigned long old_pending = vcpu->arch.pending_exceptions;
2f4cf5e4
AG		 341 unsigned int priority;
342
2f4cf5e4
AG		 343#ifdef EXIT_DEBUG
344 if (vcpu->arch.pending_exceptions)
345 printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
346#endif
347 priority = __ffs(*pending);
ada7ba17 348 while (priority < BOOK3S_IRQPRIO_MAX) {
7706664d
AG		 349 if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
350 (priority != BOOK3S_IRQPRIO_DECREMENTER)) {
351 /* DEC interrupts get cleared by mtdec */
2f4cf5e4
AG		 352 clear_bit(priority, &vcpu->arch.pending_exceptions);
353 break;
354 }
355
356 priority = find_next_bit(pending,
357 BITS_PER_BYTE * sizeof(*pending),
358 priority + 1);
359 }
90bba358
AG		 360
361 /* Tell the guest about our interrupt status */
362 if (*pending)
363 vcpu->arch.shared->int_pending = 1;
364 else if (old_pending)
365 vcpu->arch.shared->int_pending = 0;
2f4cf5e4
AG		 366}
367
368void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr)
369{
b83d4a9c
AG		 370 u32 host_pvr;
371
e15a1137 372 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
2f4cf5e4 373 vcpu->arch.pvr = pvr;
07b0907d 374#ifdef CONFIG_PPC_BOOK3S_64
2f4cf5e4
AG		 375 if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
376 kvmppc_mmu_book3s_64_init(vcpu);
377 to_book3s(vcpu)->hior = 0xfff00000;
378 to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
07b0907d
AG		 379 } else
380#endif
381 {
2f4cf5e4
AG		 382 kvmppc_mmu_book3s_32_init(vcpu);
383 to_book3s(vcpu)->hior = 0;
384 to_book3s(vcpu)->msr_mask = 0xffffffffULL;
385 }
386
387 /* If we are in hypervisor level on 970, we can tell the CPU to
388 * treat DCBZ as 32 bytes store */
389 vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
390 if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
391 !strcmp(cur_cpu_spec->platform, "ppc970"))
392 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
393
05b0ab1c
AG		 394 /* Cell performs badly if MSR_FEx are set. So let's hope nobody
395 really needs them in a VM on Cell and force disable them. */
396 if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be"))
397 to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1);
07b0907d
AG		 398
399#ifdef CONFIG_PPC_BOOK3S_32
400 /* 32 bit Book3S always has 32 byte dcbz */
401 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
402#endif
b83d4a9c
AG		 403
404 /* On some CPUs we can execute paired single operations natively */
405 asm ( "mfpvr %0" : "=r"(host_pvr));
406 switch (host_pvr) {
407 case 0x00080200: /* lonestar 2.0 */
408 case 0x00088202: /* lonestar 2.2 */
409 case 0x70000100: /* gekko 1.0 */
410 case 0x00080100: /* gekko 2.0 */
411 case 0x00083203: /* gekko 2.3a */
412 case 0x00083213: /* gekko 2.3b */
413 case 0x00083204: /* gekko 2.4 */
414 case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */
415 case 0x00087200: /* broadway */
416 vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS;
417 /* Enable HID2.PSE - in case we need it later */
418 mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29));
419 }
2f4cf5e4
AG		 420}
421
422/* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
423 * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
424 * emulate 32 bytes dcbz length.
425 *
426 * The Book3s_64 inventors also realized this case and implemented a special bit
427 * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
428 *
429 * My approach here is to patch the dcbz instruction on executing pages.
430 */
431static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
432{
9fb244a2
AG		 433 struct page *hpage;
434 u64 hpage_offset;
2f4cf5e4
AG		 435 u32 *page;
436 int i;
437
9fb244a2
AG		 438 hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
439 if (is_error_page(hpage))
2f4cf5e4
AG		 440 return;
441
9fb244a2
AG		 442 hpage_offset = pte->raddr & ~PAGE_MASK;
443 hpage_offset &= ~0xFFFULL;
444 hpage_offset /= 4;
2f4cf5e4 445
9fb244a2
AG		 446 get_page(hpage);
447 page = kmap_atomic(hpage, KM_USER0);
2f4cf5e4 448
9fb244a2
AG		 449 /* patch dcbz into reserved instruction, so we trap */
450 for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++)
451 if ((page[i] & 0xff0007ff) == INS_DCBZ)
452 page[i] &= 0xfffffff7;
2f4cf5e4 453
9fb244a2
AG		 454 kunmap_atomic(page, KM_USER0);
455 put_page(hpage);
2f4cf5e4
AG		 456}
457
458static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
459 struct kvmppc_pte *pte)
460{
666e7252 461 int relocated = (vcpu->arch.shared->msr & (data ? MSR_DR : MSR_IR));
2f4cf5e4
AG		 462 int r;
463
464 if (relocated) {
465 r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data);
466 } else {
467 pte->eaddr = eaddr;
468 pte->raddr = eaddr & 0xffffffff;
3eeafd7d 469 pte->vpage = VSID_REAL | eaddr >> 12;
2f4cf5e4
AG		 470 pte->may_read = true;
471 pte->may_write = true;
472 pte->may_execute = true;
473 r = 0;
474 }
475
476 return r;
477}
478
479static hva_t kvmppc_bad_hva(void)
480{
481 return PAGE_OFFSET;
482}
483
484static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
485 bool read)
486{
487 hva_t hpage;
488
489 if (read && !pte->may_read)
490 goto err;
491
492 if (!read && !pte->may_write)
493 goto err;
494
495 hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
496 if (kvm_is_error_hva(hpage))
497 goto err;
498
499 return hpage | (pte->raddr & ~PAGE_MASK);
500err:
501 return kvmppc_bad_hva();
502}
503
5467a97d
AG		 504int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
505 bool data)
2f4cf5e4
AG		 506{
507 struct kvmppc_pte pte;
2f4cf5e4
AG		 508
509 vcpu->stat.st++;
510
5467a97d 511 if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
9fb244a2 512 return -ENOENT;
5467a97d
AG		 513
514 *eaddr = pte.raddr;
2f4cf5e4 515
9fb244a2
AG		 516 if (!pte.may_write)
517 return -EPERM;
2f4cf5e4 518
9fb244a2
AG		 519 if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
520 return EMULATE_DO_MMIO;
2f4cf5e4 521
5467a97d 522 return EMULATE_DONE;
2f4cf5e4
AG		 523}
524
5467a97d 525int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
2f4cf5e4
AG		 526 bool data)
527{
528 struct kvmppc_pte pte;
5467a97d 529 hva_t hva = *eaddr;
2f4cf5e4
AG		 530
531 vcpu->stat.ld++;
532
5467a97d
AG		 533 if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
534 goto nopte;
535
536 *eaddr = pte.raddr;
2f4cf5e4
AG		 537
538 hva = kvmppc_pte_to_hva(vcpu, &pte, true);
539 if (kvm_is_error_hva(hva))
5467a97d 540 goto mmio;
2f4cf5e4
AG		 541
542 if (copy_from_user(ptr, (void __user *)hva, size)) {
543 printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
5467a97d 544 goto mmio;
2f4cf5e4
AG		 545 }
546
5467a97d 547 return EMULATE_DONE;
2f4cf5e4 548
5467a97d 549nopte:
2f4cf5e4 550 return -ENOENT;
5467a97d
AG		 551mmio:
552 return EMULATE_DO_MMIO;
2f4cf5e4
AG		 553}
554
555static int kvmppc_visible_gfn(struct kvm_vcpu *vcpu, gfn_t gfn)
556{
557 return kvm_is_visible_gfn(vcpu->kvm, gfn);
558}
559
560int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
561 ulong eaddr, int vec)
562{
563 bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
564 int r = RESUME_GUEST;
565 int relocated;
566 int page_found = 0;
567 struct kvmppc_pte pte;
568 bool is_mmio = false;
666e7252
AG		 569 bool dr = (vcpu->arch.shared->msr & MSR_DR) ? true : false;
570 bool ir = (vcpu->arch.shared->msr & MSR_IR) ? true : false;
f7bc74e1 571 u64 vsid;
2f4cf5e4 572
3eeafd7d 573 relocated = data ? dr : ir;
2f4cf5e4
AG		 574
575 /* Resolve real address if translation turned on */
576 if (relocated) {
577 page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data);
578 } else {
579 pte.may_execute = true;
580 pte.may_read = true;
581 pte.may_write = true;
582 pte.raddr = eaddr & 0xffffffff;
583 pte.eaddr = eaddr;
584 pte.vpage = eaddr >> 12;
3eeafd7d
AG		 585 }
586
666e7252 587 switch (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) {
3eeafd7d 588 case 0:
f7bc74e1 589 pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
3eeafd7d
AG		 590 break;
591 case MSR_DR:
3eeafd7d 592 case MSR_IR:
f7bc74e1
AG		 593 vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
594
666e7252 595 if ((vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) == MSR_DR)
f7bc74e1
AG		 596 pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
597 else
598 pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
599 pte.vpage |= vsid;
600
601 if (vsid == -1)
602 page_found = -EINVAL;
3eeafd7d 603 break;
2f4cf5e4
AG		 604 }
605
606 if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
607 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
608 /*
609 * If we do the dcbz hack, we have to NX on every execution,
610 * so we can patch the executing code. This renders our guest
611 * NX-less.
612 */
613 pte.may_execute = !data;
614 }
615
616 if (page_found == -ENOENT) {
617 /* Page not found in guest PTE entries */
5e030186 618 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
d562de48 619 vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
666e7252
AG		 620 vcpu->arch.shared->msr |=
621 (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
2f4cf5e4
AG		 622 kvmppc_book3s_queue_irqprio(vcpu, vec);
623 } else if (page_found == -EPERM) {
624 /* Storage protection */
5e030186 625 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
d562de48
AG		 626 vcpu->arch.shared->dsisr =
627 to_svcpu(vcpu)->fault_dsisr & ~DSISR_NOHPTE;
628 vcpu->arch.shared->dsisr |= DSISR_PROTFAULT;
666e7252
AG		 629 vcpu->arch.shared->msr |=
630 (to_svcpu(vcpu)->shadow_srr1 & 0x00000000f8000000ULL);
2f4cf5e4
AG		 631 kvmppc_book3s_queue_irqprio(vcpu, vec);
632 } else if (page_found == -EINVAL) {
633 /* Page not found in guest SLB */
5e030186 634 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
2f4cf5e4
AG		 635 kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
636 } else if (!is_mmio &&
637 kvmppc_visible_gfn(vcpu, pte.raddr >> PAGE_SHIFT)) {
638 /* The guest's PTE is not mapped yet. Map on the host */
639 kvmppc_mmu_map_page(vcpu, &pte);
640 if (data)
641 vcpu->stat.sp_storage++;
642 else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
643 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
644 kvmppc_patch_dcbz(vcpu, &pte);
645 } else {
646 /* MMIO */
647 vcpu->stat.mmio_exits++;
648 vcpu->arch.paddr_accessed = pte.raddr;
649 r = kvmppc_emulate_mmio(run, vcpu);
650 if ( r == RESUME_HOST_NV )
651 r = RESUME_HOST;
2f4cf5e4
AG		 652 }
653
654 return r;
655}
656
180a34d2
AG		 657static inline int get_fpr_index(int i)
658{
659#ifdef CONFIG_VSX
660 i *= 2;
661#endif
662 return i;
663}
664
665/* Give up external provider (FPU, Altivec, VSX) */
aba3bd7f 666void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
180a34d2
AG		 667{
668 struct thread_struct *t = &current->thread;
669 u64 *vcpu_fpr = vcpu->arch.fpr;
a2b07664 670#ifdef CONFIG_VSX
180a34d2 671 u64 *vcpu_vsx = vcpu->arch.vsr;
a2b07664 672#endif
180a34d2
AG		 673 u64 *thread_fpr = (u64*)t->fpr;
674 int i;
675
676 if (!(vcpu->arch.guest_owned_ext & msr))
677 return;
678
679#ifdef DEBUG_EXT
680 printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
681#endif
682
683 switch (msr) {
684 case MSR_FP:
685 giveup_fpu(current);
686 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
687 vcpu_fpr[i] = thread_fpr[get_fpr_index(i)];
688
689 vcpu->arch.fpscr = t->fpscr.val;
690 break;
691 case MSR_VEC:
692#ifdef CONFIG_ALTIVEC
693 giveup_altivec(current);
694 memcpy(vcpu->arch.vr, t->vr, sizeof(vcpu->arch.vr));
695 vcpu->arch.vscr = t->vscr;
696#endif
697 break;
698 case MSR_VSX:
699#ifdef CONFIG_VSX
700 __giveup_vsx(current);
701 for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
702 vcpu_vsx[i] = thread_fpr[get_fpr_index(i) + 1];
703#endif
704 break;
705 default:
706 BUG();
707 }
708
709 vcpu->arch.guest_owned_ext &= ~msr;
710 current->thread.regs->msr &= ~msr;
a76f8497 711 kvmppc_recalc_shadow_msr(vcpu);
180a34d2
AG		 712}
713
8963221d 714static int kvmppc_read_inst(struct kvm_vcpu *vcpu)
c8c0b6f2 715{
c7f38f46
AG		 716 ulong srr0 = kvmppc_get_pc(vcpu);
717 u32 last_inst = kvmppc_get_last_inst(vcpu);
c8c0b6f2
AG		 718 int ret;
719
c7f38f46 720 ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false);
c8c0b6f2 721 if (ret == -ENOENT) {
666e7252
AG		 722 ulong msr = vcpu->arch.shared->msr;
723
724 msr = kvmppc_set_field(msr, 33, 33, 1);
725 msr = kvmppc_set_field(msr, 34, 36, 0);
726 vcpu->arch.shared->msr = kvmppc_set_field(msr, 42, 47, 0);
c8c0b6f2 727 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_INST_STORAGE);
8963221d
AG		 728 return EMULATE_AGAIN;
729 }
730
731 return EMULATE_DONE;
732}
733
734static int kvmppc_check_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr)
735{
736
737 /* Need to do paired single emulation? */
738 if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
739 return EMULATE_DONE;
740
741 /* Read out the instruction */
742 if (kvmppc_read_inst(vcpu) == EMULATE_DONE)
c8c0b6f2
AG		 743 /* Need to emulate */
744 return EMULATE_FAIL;
c8c0b6f2
AG		 745
746 return EMULATE_AGAIN;
747}
748
180a34d2
AG		 749/* Handle external providers (FPU, Altivec, VSX) */
750static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
751 ulong msr)
752{
753 struct thread_struct *t = &current->thread;
754 u64 *vcpu_fpr = vcpu->arch.fpr;
a2b07664 755#ifdef CONFIG_VSX
180a34d2 756 u64 *vcpu_vsx = vcpu->arch.vsr;
a2b07664 757#endif
180a34d2
AG		 758 u64 *thread_fpr = (u64*)t->fpr;
759 int i;
760
3c402a75
AG		 761 /* When we have paired singles, we emulate in software */
762 if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
763 return RESUME_GUEST;
764
666e7252 765 if (!(vcpu->arch.shared->msr & msr)) {
180a34d2
AG		 766 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
767 return RESUME_GUEST;
768 }
769
c2453693
AG		 770 /* We already own the ext */
771 if (vcpu->arch.guest_owned_ext & msr) {
772 return RESUME_GUEST;
773 }
774
180a34d2
AG		 775#ifdef DEBUG_EXT
776 printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
777#endif
778
779 current->thread.regs->msr |= msr;
780
781 switch (msr) {
782 case MSR_FP:
783 for (i = 0; i < ARRAY_SIZE(vcpu->arch.fpr); i++)
784 thread_fpr[get_fpr_index(i)] = vcpu_fpr[i];
785
786 t->fpscr.val = vcpu->arch.fpscr;
787 t->fpexc_mode = 0;
788 kvmppc_load_up_fpu();
789 break;
790 case MSR_VEC:
791#ifdef CONFIG_ALTIVEC
792 memcpy(t->vr, vcpu->arch.vr, sizeof(vcpu->arch.vr));
793 t->vscr = vcpu->arch.vscr;
794 t->vrsave = -1;
795 kvmppc_load_up_altivec();
796#endif
797 break;
798 case MSR_VSX:
799#ifdef CONFIG_VSX
800 for (i = 0; i < ARRAY_SIZE(vcpu->arch.vsr); i++)
801 thread_fpr[get_fpr_index(i) + 1] = vcpu_vsx[i];
802 kvmppc_load_up_vsx();
803#endif
804 break;
805 default:
806 BUG();
807 }
808
809 vcpu->arch.guest_owned_ext |= msr;
810
a76f8497 811 kvmppc_recalc_shadow_msr(vcpu);
180a34d2
AG		 812
813 return RESUME_GUEST;
814}
815
2f4cf5e4
AG		 816int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
817 unsigned int exit_nr)
818{
819 int r = RESUME_HOST;
820
821 vcpu->stat.sum_exits++;
822
823 run->exit_reason = KVM_EXIT_UNKNOWN;
824 run->ready_for_interrupt_injection = 1;
825#ifdef EXIT_DEBUG
826 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | dec=0x%x | msr=0x%lx\n",
c7f38f46
AG		 827 exit_nr, kvmppc_get_pc(vcpu), kvmppc_get_fault_dar(vcpu),
828 kvmppc_get_dec(vcpu), to_svcpu(vcpu)->shadow_srr1);
2f4cf5e4
AG		 829#elif defined (EXIT_DEBUG_SIMPLE)
830 if ((exit_nr != 0x900) && (exit_nr != 0x500))
831 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | dar=0x%lx | msr=0x%lx\n",
c7f38f46 832 exit_nr, kvmppc_get_pc(vcpu), kvmppc_get_fault_dar(vcpu),
666e7252 833 vcpu->arch.shared->msr);
2f4cf5e4
AG		 834#endif
835 kvm_resched(vcpu);
836 switch (exit_nr) {
837 case BOOK3S_INTERRUPT_INST_STORAGE:
838 vcpu->stat.pf_instruc++;
61db97cc
AG		 839
840#ifdef CONFIG_PPC_BOOK3S_32
841 /* We set segments as unused segments when invalidating them. So
842 * treat the respective fault as segment fault. */
843 if (to_svcpu(vcpu)->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT]
844 == SR_INVALID) {
845 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
846 r = RESUME_GUEST;
847 break;
848 }
849#endif
850
2f4cf5e4 851 /* only care about PTEG not found errors, but leave NX alone */
c7f38f46
AG		 852 if (to_svcpu(vcpu)->shadow_srr1 & 0x40000000) {
853 r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
2f4cf5e4
AG		 854 vcpu->stat.sp_instruc++;
855 } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
856 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
857 /*
858 * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
859 * so we can't use the NX bit inside the guest. Let's cross our fingers,
860 * that no guest that needs the dcbz hack does NX.
861 */
af7b4d10 862 kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
9fb244a2 863 r = RESUME_GUEST;
2f4cf5e4 864 } else {
666e7252
AG		 865 vcpu->arch.shared->msr |=
866 to_svcpu(vcpu)->shadow_srr1 & 0x58000000;
2f4cf5e4 867 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
af7b4d10 868 kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
2f4cf5e4
AG		 869 r = RESUME_GUEST;
870 }
871 break;
872 case BOOK3S_INTERRUPT_DATA_STORAGE:
c7f38f46
AG		 873 {
874 ulong dar = kvmppc_get_fault_dar(vcpu);
2f4cf5e4 875 vcpu->stat.pf_storage++;
61db97cc
AG		 876
877#ifdef CONFIG_PPC_BOOK3S_32
878 /* We set segments as unused segments when invalidating them. So
879 * treat the respective fault as segment fault. */
880 if ((to_svcpu(vcpu)->sr[dar >> SID_SHIFT]) == SR_INVALID) {
881 kvmppc_mmu_map_segment(vcpu, dar);
882 r = RESUME_GUEST;
883 break;
884 }
885#endif
886
2f4cf5e4 887 /* The only case we need to handle is missing shadow PTEs */
c7f38f46
AG		 888 if (to_svcpu(vcpu)->fault_dsisr & DSISR_NOHPTE) {
889 r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
2f4cf5e4 890 } else {
5e030186 891 vcpu->arch.shared->dar = dar;
d562de48 892 vcpu->arch.shared->dsisr = to_svcpu(vcpu)->fault_dsisr;
2f4cf5e4 893 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
5e030186 894 kvmppc_mmu_pte_flush(vcpu, dar, ~0xFFFUL);
2f4cf5e4
AG		 895 r = RESUME_GUEST;
896 }
897 break;
c7f38f46 898 }
2f4cf5e4 899 case BOOK3S_INTERRUPT_DATA_SEGMENT:
c7f38f46 900 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
5e030186 901 vcpu->arch.shared->dar = kvmppc_get_fault_dar(vcpu);
2f4cf5e4
AG		 902 kvmppc_book3s_queue_irqprio(vcpu,
903 BOOK3S_INTERRUPT_DATA_SEGMENT);
904 }
905 r = RESUME_GUEST;
906 break;
907 case BOOK3S_INTERRUPT_INST_SEGMENT:
c7f38f46 908 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
2f4cf5e4
AG		 909 kvmppc_book3s_queue_irqprio(vcpu,
910 BOOK3S_INTERRUPT_INST_SEGMENT);
911 }
912 r = RESUME_GUEST;
913 break;
914 /* We're good on these - the host merely wanted to get our attention */
915 case BOOK3S_INTERRUPT_DECREMENTER:
916 vcpu->stat.dec_exits++;
917 r = RESUME_GUEST;
918 break;
919 case BOOK3S_INTERRUPT_EXTERNAL:
920 vcpu->stat.ext_intr_exits++;
921 r = RESUME_GUEST;
922 break;
7fdaec99
AG		 923 case BOOK3S_INTERRUPT_PERFMON:
924 r = RESUME_GUEST;
925 break;
2f4cf5e4
AG		 926 case BOOK3S_INTERRUPT_PROGRAM:
927 {
928 enum emulation_result er;
ff1ca3f9
AG		 929 ulong flags;
930
c8c0b6f2 931program_interrupt:
c7f38f46 932 flags = to_svcpu(vcpu)->shadow_srr1 & 0x1f0000ull;
2f4cf5e4 933
666e7252 934 if (vcpu->arch.shared->msr & MSR_PR) {
2f4cf5e4 935#ifdef EXIT_DEBUG
c7f38f46 936 printk(KERN_INFO "Userspace triggered 0x700 exception at 0x%lx (0x%x)\n", kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
2f4cf5e4 937#endif
c7f38f46 938 if ((kvmppc_get_last_inst(vcpu) & 0xff0007ff) !=
2f4cf5e4 939 (INS_DCBZ & 0xfffffff7)) {
ff1ca3f9 940 kvmppc_core_queue_program(vcpu, flags);
2f4cf5e4
AG		 941 r = RESUME_GUEST;
942 break;
943 }
944 }
945
946 vcpu->stat.emulated_inst_exits++;
947 er = kvmppc_emulate_instruction(run, vcpu);
948 switch (er) {
949 case EMULATE_DONE:
97c4cfbe 950 r = RESUME_GUEST_NV;
2f4cf5e4 951 break;
37f5bca6
AG		 952 case EMULATE_AGAIN:
953 r = RESUME_GUEST;
954 break;
2f4cf5e4
AG		 955 case EMULATE_FAIL:
956 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
c7f38f46 957 __func__, kvmppc_get_pc(vcpu), kvmppc_get_last_inst(vcpu));
ff1ca3f9 958 kvmppc_core_queue_program(vcpu, flags);
2f4cf5e4
AG		 959 r = RESUME_GUEST;
960 break;
e5c29e92
AG		 961 case EMULATE_DO_MMIO:
962 run->exit_reason = KVM_EXIT_MMIO;
963 r = RESUME_HOST_NV;
964 break;
2f4cf5e4
AG		 965 default:
966 BUG();
967 }
968 break;
969 }
970 case BOOK3S_INTERRUPT_SYSCALL:
ad0a048b
AG		 971 if (vcpu->arch.osi_enabled &&
972 (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
973 (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
2a342ed5 974 /* MOL hypercalls */
ad0a048b
AG		 975 u64 *gprs = run->osi.gprs;
976 int i;
977
978 run->exit_reason = KVM_EXIT_OSI;
979 for (i = 0; i < 32; i++)
980 gprs[i] = kvmppc_get_gpr(vcpu, i);
981 vcpu->arch.osi_needed = 1;
982 r = RESUME_HOST_NV;
2a342ed5
AG		 983 } else if (!(vcpu->arch.shared->msr & MSR_PR) &&
984 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
985 /* KVM PV hypercalls */
986 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
987 r = RESUME_GUEST;
ad0a048b 988 } else {
2a342ed5 989 /* Guest syscalls */
ad0a048b
AG		 990 vcpu->stat.syscall_exits++;
991 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
992 r = RESUME_GUEST;
993 }
2f4cf5e4 994 break;
2f4cf5e4 995 case BOOK3S_INTERRUPT_FP_UNAVAIL:
2f4cf5e4
AG		 996 case BOOK3S_INTERRUPT_ALTIVEC:
997 case BOOK3S_INTERRUPT_VSX:
c8c0b6f2
AG		 998 {
999 int ext_msr = 0;
1000
1001 switch (exit_nr) {
1002 case BOOK3S_INTERRUPT_FP_UNAVAIL: ext_msr = MSR_FP; break;
1003 case BOOK3S_INTERRUPT_ALTIVEC: ext_msr = MSR_VEC; break;
1004 case BOOK3S_INTERRUPT_VSX: ext_msr = MSR_VSX; break;
1005 }
1006
1007 switch (kvmppc_check_ext(vcpu, exit_nr)) {
1008 case EMULATE_DONE:
1009 /* everything ok - let's enable the ext */
1010 r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
1011 break;
1012 case EMULATE_FAIL:
1013 /* we need to emulate this instruction */
1014 goto program_interrupt;
1015 break;
1016 default:
1017 /* nothing to worry about - go again */
1018 break;
1019 }
180a34d2 1020 break;
c8c0b6f2 1021 }
ca7f4203
AG		 1022 case BOOK3S_INTERRUPT_ALIGNMENT:
1023 if (kvmppc_read_inst(vcpu) == EMULATE_DONE) {
d562de48 1024 vcpu->arch.shared->dsisr = kvmppc_alignment_dsisr(vcpu,
c7f38f46 1025 kvmppc_get_last_inst(vcpu));
5e030186 1026 vcpu->arch.shared->dar = kvmppc_alignment_dar(vcpu,
c7f38f46 1027 kvmppc_get_last_inst(vcpu));
ca7f4203
AG		 1028 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1029 }
1030 r = RESUME_GUEST;
1031 break;
180a34d2
AG		 1032 case BOOK3S_INTERRUPT_MACHINE_CHECK:
1033 case BOOK3S_INTERRUPT_TRACE:
2f4cf5e4
AG		 1034 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1035 r = RESUME_GUEST;
1036 break;
1037 default:
1038 /* Ugh - bork here! What did we get? */
f7adbba1 1039 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
c7f38f46 1040 exit_nr, kvmppc_get_pc(vcpu), to_svcpu(vcpu)->shadow_srr1);
2f4cf5e4
AG		 1041 r = RESUME_HOST;
1042 BUG();
1043 break;
1044 }
1045
1046
1047 if (!(r & RESUME_HOST)) {
1048 /* To avoid clobbering exit_reason, only check for signals if
1049 * we aren't already exiting to userspace for some other
1050 * reason. */
1051 if (signal_pending(current)) {
1052#ifdef EXIT_DEBUG
1053 printk(KERN_EMERG "KVM: Going back to host\n");
1054#endif
1055 vcpu->stat.signal_exits++;
1056 run->exit_reason = KVM_EXIT_INTR;
1057 r = -EINTR;
1058 } else {
1059 /* In case an interrupt came in that was triggered
1060 * from userspace (like DEC), we need to check what
1061 * to inject now! */
1062 kvmppc_core_deliver_interrupts(vcpu);
1063 }
1064 }
1065
1066#ifdef EXIT_DEBUG
c7f38f46 1067 printk(KERN_EMERG "KVM exit: vcpu=0x%p pc=0x%lx r=0x%x\n", vcpu, kvmppc_get_pc(vcpu), r);
2f4cf5e4
AG		 1068#endif
1069
1070 return r;
1071}
1072
1073int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
1074{
1075 return 0;
1076}
1077
1078int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1079{
1080 int i;
1081
c7f38f46 1082 regs->pc = kvmppc_get_pc(vcpu);
992b5b29 1083 regs->cr = kvmppc_get_cr(vcpu);
c7f38f46
AG		 1084 regs->ctr = kvmppc_get_ctr(vcpu);
1085 regs->lr = kvmppc_get_lr(vcpu);
992b5b29 1086 regs->xer = kvmppc_get_xer(vcpu);
666e7252 1087 regs->msr = vcpu->arch.shared->msr;
de7906c3
AG		 1088 regs->srr0 = vcpu->arch.shared->srr0;
1089 regs->srr1 = vcpu->arch.shared->srr1;
2f4cf5e4 1090 regs->pid = vcpu->arch.pid;
a73a9599
AG		 1091 regs->sprg0 = vcpu->arch.shared->sprg0;
1092 regs->sprg1 = vcpu->arch.shared->sprg1;
1093 regs->sprg2 = vcpu->arch.shared->sprg2;
1094 regs->sprg3 = vcpu->arch.shared->sprg3;
2f4cf5e4
AG		 1095 regs->sprg5 = vcpu->arch.sprg4;
1096 regs->sprg6 = vcpu->arch.sprg5;
1097 regs->sprg7 = vcpu->arch.sprg6;
1098
1099 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
8e5b26b5 1100 regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
2f4cf5e4
AG		 1101
1102 return 0;
1103}
1104
1105int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
1106{
1107 int i;
1108
c7f38f46 1109 kvmppc_set_pc(vcpu, regs->pc);
992b5b29 1110 kvmppc_set_cr(vcpu, regs->cr);
c7f38f46
AG		 1111 kvmppc_set_ctr(vcpu, regs->ctr);
1112 kvmppc_set_lr(vcpu, regs->lr);
992b5b29 1113 kvmppc_set_xer(vcpu, regs->xer);
2f4cf5e4 1114 kvmppc_set_msr(vcpu, regs->msr);
de7906c3
AG		 1115 vcpu->arch.shared->srr0 = regs->srr0;
1116 vcpu->arch.shared->srr1 = regs->srr1;
a73a9599
AG		 1117 vcpu->arch.shared->sprg0 = regs->sprg0;
1118 vcpu->arch.shared->sprg1 = regs->sprg1;
1119 vcpu->arch.shared->sprg2 = regs->sprg2;
1120 vcpu->arch.shared->sprg3 = regs->sprg3;
2f4cf5e4
AG		 1121 vcpu->arch.sprg5 = regs->sprg4;
1122 vcpu->arch.sprg6 = regs->sprg5;
1123 vcpu->arch.sprg7 = regs->sprg6;
1124
8e5b26b5
AG		 1125 for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
1126 kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
2f4cf5e4
AG		 1127
1128 return 0;
1129}
1130
1131int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
1132 struct kvm_sregs *sregs)
1133{
e15a1137
AG		 1134 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1135 int i;
1136
2f4cf5e4 1137 sregs->pvr = vcpu->arch.pvr;
e15a1137
AG		 1138
1139 sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
1140 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1141 for (i = 0; i < 64; i++) {
1142 sregs->u.s.ppc64.slb[i].slbe = vcpu3s->slb[i].orige | i;
1143 sregs->u.s.ppc64.slb[i].slbv = vcpu3s->slb[i].origv;
1144 }
1145 } else {
1146 for (i = 0; i < 16; i++) {
1147 sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw;
1148 sregs->u.s.ppc32.sr[i] = vcpu3s->sr[i].raw;
1149 }
1150 for (i = 0; i < 8; i++) {
1151 sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
1152 sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
1153 }
1154 }
98001d8d 1155
2f4cf5e4
AG		 1156 return 0;
1157}
1158
1159int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
1160 struct kvm_sregs *sregs)
1161{
e15a1137
AG		 1162 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1163 int i;
1164
2f4cf5e4 1165 kvmppc_set_pvr(vcpu, sregs->pvr);
e15a1137
AG		 1166
1167 vcpu3s->sdr1 = sregs->u.s.sdr1;
1168 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1169 for (i = 0; i < 64; i++) {
1170 vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv,
1171 sregs->u.s.ppc64.slb[i].slbe);
1172 }
1173 } else {
1174 for (i = 0; i < 16; i++) {
1175 vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
1176 }
1177 for (i = 0; i < 8; i++) {
1178 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
1179 (u32)sregs->u.s.ppc32.ibat[i]);
1180 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
1181 (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
1182 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
1183 (u32)sregs->u.s.ppc32.dbat[i]);
1184 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
1185 (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
1186 }
1187 }
1188
1189 /* Flush the MMU after messing with the segments */
1190 kvmppc_mmu_pte_flush(vcpu, 0, 0);
98001d8d 1191
2f4cf5e4
AG		 1192 return 0;
1193}
1194
1195int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1196{
1197 return -ENOTSUPP;
1198}
1199
1200int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
1201{
1202 return -ENOTSUPP;
1203}
1204
1205int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
1206 struct kvm_translation *tr)
1207{
1208 return 0;
1209}
1210
1211/*
1212 * Get (and clear) the dirty memory log for a memory slot.
1213 */
1214int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
1215 struct kvm_dirty_log *log)
1216{
1217 struct kvm_memory_slot *memslot;
1218 struct kvm_vcpu *vcpu;
1219 ulong ga, ga_end;
1220 int is_dirty = 0;
87bf6e7d
TY		 1221 int r;
1222 unsigned long n;
2f4cf5e4 1223
79fac95e 1224 mutex_lock(&kvm->slots_lock);
2f4cf5e4
AG		 1225
1226 r = kvm_get_dirty_log(kvm, log, &is_dirty);
1227 if (r)
1228 goto out;
1229
1230 /* If nothing is dirty, don't bother messing with page tables. */
1231 if (is_dirty) {
46a26bf5 1232 memslot = &kvm->memslots->memslots[log->slot];
2f4cf5e4
AG		 1233
1234 ga = memslot->base_gfn << PAGE_SHIFT;
1235 ga_end = ga + (memslot->npages << PAGE_SHIFT);
1236
1237 kvm_for_each_vcpu(n, vcpu, kvm)
1238 kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
1239
87bf6e7d 1240 n = kvm_dirty_bitmap_bytes(memslot);
2f4cf5e4
AG		 1241 memset(memslot->dirty_bitmap, 0, n);
1242 }
1243
1244 r = 0;
1245out:
79fac95e 1246 mutex_unlock(&kvm->slots_lock);
2f4cf5e4
AG		 1247 return r;
1248}
1249
1250int kvmppc_core_check_processor_compat(void)
1251{
1252 return 0;
1253}
1254
1255struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
1256{
1257 struct kvmppc_vcpu_book3s *vcpu_book3s;
1258 struct kvm_vcpu *vcpu;
c7f38f46 1259 int err = -ENOMEM;
2f4cf5e4 1260
032c3407 1261 vcpu_book3s = vmalloc(sizeof(struct kvmppc_vcpu_book3s));
c7f38f46 1262 if (!vcpu_book3s)
2f4cf5e4 1263 goto out;
c7f38f46 1264
7e821d39 1265 memset(vcpu_book3s, 0, sizeof(struct kvmppc_vcpu_book3s));
2f4cf5e4 1266
c7f38f46
AG		 1267 vcpu_book3s->shadow_vcpu = (struct kvmppc_book3s_shadow_vcpu *)
1268 kzalloc(sizeof(*vcpu_book3s->shadow_vcpu), GFP_KERNEL);
1269 if (!vcpu_book3s->shadow_vcpu)
1270 goto free_vcpu;
1271
2f4cf5e4
AG		 1272 vcpu = &vcpu_book3s->vcpu;
1273 err = kvm_vcpu_init(vcpu, kvm, id);
1274 if (err)
c7f38f46 1275 goto free_shadow_vcpu;
2f4cf5e4 1276
96bc451a
AG		 1277 vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO);
1278 if (!vcpu->arch.shared)
1279 goto uninit_vcpu;
1280
2f4cf5e4
AG		 1281 vcpu->arch.host_retip = kvm_return_point;
1282 vcpu->arch.host_msr = mfmsr();
07b0907d 1283#ifdef CONFIG_PPC_BOOK3S_64
2f4cf5e4
AG		 1284 /* default to book3s_64 (970fx) */
1285 vcpu->arch.pvr = 0x3C0301;
07b0907d
AG		 1286#else
1287 /* default to book3s_32 (750) */
1288 vcpu->arch.pvr = 0x84202;
1289#endif
2f4cf5e4
AG		 1290 kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
1291 vcpu_book3s->slb_nr = 64;
1292
1293 /* remember where some real-mode handlers are */
1294 vcpu->arch.trampoline_lowmem = kvmppc_trampoline_lowmem;
1295 vcpu->arch.trampoline_enter = kvmppc_trampoline_enter;
1296 vcpu->arch.highmem_handler = (ulong)kvmppc_handler_highmem;
07b0907d 1297#ifdef CONFIG_PPC_BOOK3S_64
021ec9c6 1298 vcpu->arch.rmcall = *(ulong*)kvmppc_rmcall;
07b0907d
AG		 1299#else
1300 vcpu->arch.rmcall = (ulong)kvmppc_rmcall;
1301#endif
2f4cf5e4
AG		 1302
1303 vcpu->arch.shadow_msr = MSR_USER64;
1304
9cc5e953 1305 err = kvmppc_mmu_init(vcpu);
2f4cf5e4 1306 if (err < 0)
96bc451a 1307 goto uninit_vcpu;
2f4cf5e4
AG		 1308
1309 return vcpu;
1310
96bc451a
AG		 1311uninit_vcpu:
1312 kvm_vcpu_uninit(vcpu);
c7f38f46
AG		 1313free_shadow_vcpu:
1314 kfree(vcpu_book3s->shadow_vcpu);
2f4cf5e4 1315free_vcpu:
032c3407 1316 vfree(vcpu_book3s);
2f4cf5e4
AG		 1317out:
1318 return ERR_PTR(err);
1319}
1320
1321void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
1322{
1323 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
1324
96bc451a 1325 free_page((unsigned long)vcpu->arch.shared);
2f4cf5e4 1326 kvm_vcpu_uninit(vcpu);
c7f38f46 1327 kfree(vcpu_book3s->shadow_vcpu);
032c3407 1328 vfree(vcpu_book3s);
2f4cf5e4
AG		 1329}
1330
1331extern int __kvmppc_vcpu_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
1332int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
1333{
1334 int ret;
49f6be8e
AS		 1335 double fpr[32][TS_FPRWIDTH];
1336 unsigned int fpscr;
1337 int fpexc_mode;
a2b07664 1338#ifdef CONFIG_ALTIVEC
49f6be8e
AS		 1339 vector128 vr[32];
1340 vector128 vscr;
1341 unsigned long uninitialized_var(vrsave);
1342 int used_vr;
a2b07664
AG		 1343#endif
1344#ifdef CONFIG_VSX
49f6be8e 1345 int used_vsr;
a2b07664 1346#endif
180a34d2 1347 ulong ext_msr;
2f4cf5e4
AG		 1348
1349 /* No need to go into the guest when all we do is going out */
1350 if (signal_pending(current)) {
1351 kvm_run->exit_reason = KVM_EXIT_INTR;
1352 return -EINTR;
1353 }
1354
180a34d2
AG		 1355 /* Save FPU state in stack */
1356 if (current->thread.regs->msr & MSR_FP)
1357 giveup_fpu(current);
49f6be8e
AS		 1358 memcpy(fpr, current->thread.fpr, sizeof(current->thread.fpr));
1359 fpscr = current->thread.fpscr.val;
1360 fpexc_mode = current->thread.fpexc_mode;
180a34d2
AG		 1361
1362#ifdef CONFIG_ALTIVEC
1363 /* Save Altivec state in stack */
49f6be8e
AS		 1364 used_vr = current->thread.used_vr;
1365 if (used_vr) {
180a34d2
AG		 1366 if (current->thread.regs->msr & MSR_VEC)
1367 giveup_altivec(current);
49f6be8e
AS		 1368 memcpy(vr, current->thread.vr, sizeof(current->thread.vr));
1369 vscr = current->thread.vscr;
1370 vrsave = current->thread.vrsave;
180a34d2 1371 }
180a34d2
AG		 1372#endif
1373
1374#ifdef CONFIG_VSX
1375 /* Save VSX state in stack */
49f6be8e
AS		 1376 used_vsr = current->thread.used_vsr;
1377 if (used_vsr && (current->thread.regs->msr & MSR_VSX))
180a34d2 1378 __giveup_vsx(current);
180a34d2
AG		 1379#endif
1380
1381 /* Remember the MSR with disabled extensions */
1382 ext_msr = current->thread.regs->msr;
1383
2f4cf5e4
AG		 1384 /* XXX we get called with irq disabled - change that! */
1385 local_irq_enable();
1386
d1bab74c 1387 /* Preload FPU if it's enabled */
666e7252 1388 if (vcpu->arch.shared->msr & MSR_FP)
d1bab74c
AG		 1389 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
1390
2f4cf5e4
AG		 1391 ret = __kvmppc_vcpu_entry(kvm_run, vcpu);
1392
1393 local_irq_disable();
1394
180a34d2
AG		 1395 current->thread.regs->msr = ext_msr;
1396
1397 /* Make sure we save the guest FPU/Altivec/VSX state */
1398 kvmppc_giveup_ext(vcpu, MSR_FP);
1399 kvmppc_giveup_ext(vcpu, MSR_VEC);
1400 kvmppc_giveup_ext(vcpu, MSR_VSX);
1401
1402 /* Restore FPU state from stack */
49f6be8e
AS		 1403 memcpy(current->thread.fpr, fpr, sizeof(current->thread.fpr));
1404 current->thread.fpscr.val = fpscr;
1405 current->thread.fpexc_mode = fpexc_mode;
180a34d2
AG		 1406
1407#ifdef CONFIG_ALTIVEC
1408 /* Restore Altivec state from stack */
49f6be8e
AS		 1409 if (used_vr && current->thread.used_vr) {
1410 memcpy(current->thread.vr, vr, sizeof(current->thread.vr));
1411 current->thread.vscr = vscr;
1412 current->thread.vrsave = vrsave;
180a34d2 1413 }
49f6be8e 1414 current->thread.used_vr = used_vr;
180a34d2
AG		 1415#endif
1416
1417#ifdef CONFIG_VSX
49f6be8e 1418 current->thread.used_vsr = used_vsr;
180a34d2
AG		 1419#endif
1420
2f4cf5e4
AG		 1421 return ret;
1422}
1423
1424static int kvmppc_book3s_init(void)
1425{
fef093be
AG		 1426 int r;
1427
1428 r = kvm_init(NULL, sizeof(struct kvmppc_vcpu_book3s), 0,
1429 THIS_MODULE);
1430
1431 if (r)
1432 return r;
1433
1434 r = kvmppc_mmu_hpte_sysinit();
1435
1436 return r;
2f4cf5e4
AG		 1437}
1438
1439static void kvmppc_book3s_exit(void)
1440{
fef093be 1441 kvmppc_mmu_hpte_sysexit();
2f4cf5e4
AG		 1442 kvm_exit();
1443}
1444
1445module_init(kvmppc_book3s_init);
1446module_exit(kvmppc_book3s_exit);
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