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 * Paul Mackerras <paulus@samba.org>
8 *
9 * Description:
10 * Functions relating to running KVM on Book 3S processors where
11 * we don't have access to hypervisor mode, and we run the guest
12 * in problem state (user mode).
13 *
14 * This file is derived from arch/powerpc/kvm/44x.c,
15 * by Hollis Blanchard <hollisb@us.ibm.com>.
16 *
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License, version 2, as
19 * published by the Free Software Foundation.
20 */
21
22 #include <linux/kvm_host.h>
23 #include <linux/export.h>
24 #include <linux/err.h>
25 #include <linux/slab.h>
26
27 #include <asm/reg.h>
28 #include <asm/cputable.h>
29 #include <asm/cacheflush.h>
30 #include <asm/tlbflush.h>
31 #include <asm/uaccess.h>
32 #include <asm/io.h>
33 #include <asm/kvm_ppc.h>
34 #include <asm/kvm_book3s.h>
35 #include <asm/mmu_context.h>
36 #include <asm/switch_to.h>
37 #include <asm/firmware.h>
38 #include <asm/setup.h>
39 #include <linux/gfp.h>
40 #include <linux/sched.h>
41 #include <linux/vmalloc.h>
42 #include <linux/highmem.h>
43 #include <linux/module.h>
44 #include <linux/miscdevice.h>
45
46 #include "book3s.h"
47
48 #define CREATE_TRACE_POINTS
49 #include "trace_pr.h"
50
51 /* #define EXIT_DEBUG */
52 /* #define DEBUG_EXT */
53
54 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
55 ulong msr);
56 static void kvmppc_giveup_fac(struct kvm_vcpu *vcpu, ulong fac);
57
58 /* Some compatibility defines */
59 #ifdef CONFIG_PPC_BOOK3S_32
60 #define MSR_USER32 MSR_USER
61 #define MSR_USER64 MSR_USER
62 #define HW_PAGE_SIZE PAGE_SIZE
63 #endif
64
kvmppc_is_split_real(struct kvm_vcpu * vcpu)65 static bool kvmppc_is_split_real(struct kvm_vcpu *vcpu)
66 {
67 ulong msr = kvmppc_get_msr(vcpu);
68 return (msr & (MSR_IR|MSR_DR)) == MSR_DR;
69 }
70
kvmppc_fixup_split_real(struct kvm_vcpu * vcpu)71 static void kvmppc_fixup_split_real(struct kvm_vcpu *vcpu)
72 {
73 ulong msr = kvmppc_get_msr(vcpu);
74 ulong pc = kvmppc_get_pc(vcpu);
75
76 /* We are in DR only split real mode */
77 if ((msr & (MSR_IR|MSR_DR)) != MSR_DR)
78 return;
79
80 /* We have not fixed up the guest already */
81 if (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK)
82 return;
83
84 /* The code is in fixupable address space */
85 if (pc & SPLIT_HACK_MASK)
86 return;
87
88 vcpu->arch.hflags |= BOOK3S_HFLAG_SPLIT_HACK;
89 kvmppc_set_pc(vcpu, pc | SPLIT_HACK_OFFS);
90 }
91
92 void kvmppc_unfixup_split_real(struct kvm_vcpu *vcpu);
93
kvmppc_core_vcpu_load_pr(struct kvm_vcpu * vcpu,int cpu)94 static void kvmppc_core_vcpu_load_pr(struct kvm_vcpu *vcpu, int cpu)
95 {
96 #ifdef CONFIG_PPC_BOOK3S_64
97 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
98 memcpy(svcpu->slb, to_book3s(vcpu)->slb_shadow, sizeof(svcpu->slb));
99 svcpu->slb_max = to_book3s(vcpu)->slb_shadow_max;
100 svcpu->in_use = 0;
101 svcpu_put(svcpu);
102 #endif
103
104 /* Disable AIL if supported */
105 if (cpu_has_feature(CPU_FTR_HVMODE) &&
106 cpu_has_feature(CPU_FTR_ARCH_207S))
107 mtspr(SPRN_LPCR, mfspr(SPRN_LPCR) & ~LPCR_AIL);
108
109 vcpu->cpu = smp_processor_id();
110 #ifdef CONFIG_PPC_BOOK3S_32
111 current->thread.kvm_shadow_vcpu = vcpu->arch.shadow_vcpu;
112 #endif
113
114 if (kvmppc_is_split_real(vcpu))
115 kvmppc_fixup_split_real(vcpu);
116 }
117
kvmppc_core_vcpu_put_pr(struct kvm_vcpu * vcpu)118 static void kvmppc_core_vcpu_put_pr(struct kvm_vcpu *vcpu)
119 {
120 #ifdef CONFIG_PPC_BOOK3S_64
121 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
122 if (svcpu->in_use) {
123 kvmppc_copy_from_svcpu(vcpu, svcpu);
124 }
125 memcpy(to_book3s(vcpu)->slb_shadow, svcpu->slb, sizeof(svcpu->slb));
126 to_book3s(vcpu)->slb_shadow_max = svcpu->slb_max;
127 svcpu_put(svcpu);
128 #endif
129
130 if (kvmppc_is_split_real(vcpu))
131 kvmppc_unfixup_split_real(vcpu);
132
133 kvmppc_giveup_ext(vcpu, MSR_FP | MSR_VEC | MSR_VSX);
134 kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
135
136 /* Enable AIL if supported */
137 if (cpu_has_feature(CPU_FTR_HVMODE) &&
138 cpu_has_feature(CPU_FTR_ARCH_207S))
139 mtspr(SPRN_LPCR, mfspr(SPRN_LPCR) | LPCR_AIL_3);
140
141 vcpu->cpu = -1;
142 }
143
144 /* Copy data needed by real-mode code from vcpu to shadow vcpu */
kvmppc_copy_to_svcpu(struct kvmppc_book3s_shadow_vcpu * svcpu,struct kvm_vcpu * vcpu)145 void kvmppc_copy_to_svcpu(struct kvmppc_book3s_shadow_vcpu *svcpu,
146 struct kvm_vcpu *vcpu)
147 {
148 svcpu->gpr[0] = vcpu->arch.gpr[0];
149 svcpu->gpr[1] = vcpu->arch.gpr[1];
150 svcpu->gpr[2] = vcpu->arch.gpr[2];
151 svcpu->gpr[3] = vcpu->arch.gpr[3];
152 svcpu->gpr[4] = vcpu->arch.gpr[4];
153 svcpu->gpr[5] = vcpu->arch.gpr[5];
154 svcpu->gpr[6] = vcpu->arch.gpr[6];
155 svcpu->gpr[7] = vcpu->arch.gpr[7];
156 svcpu->gpr[8] = vcpu->arch.gpr[8];
157 svcpu->gpr[9] = vcpu->arch.gpr[9];
158 svcpu->gpr[10] = vcpu->arch.gpr[10];
159 svcpu->gpr[11] = vcpu->arch.gpr[11];
160 svcpu->gpr[12] = vcpu->arch.gpr[12];
161 svcpu->gpr[13] = vcpu->arch.gpr[13];
162 svcpu->cr = vcpu->arch.cr;
163 svcpu->xer = vcpu->arch.xer;
164 svcpu->ctr = vcpu->arch.ctr;
165 svcpu->lr = vcpu->arch.lr;
166 svcpu->pc = vcpu->arch.pc;
167 #ifdef CONFIG_PPC_BOOK3S_64
168 svcpu->shadow_fscr = vcpu->arch.shadow_fscr;
169 #endif
170 /*
171 * Now also save the current time base value. We use this
172 * to find the guest purr and spurr value.
173 */
174 vcpu->arch.entry_tb = get_tb();
175 vcpu->arch.entry_vtb = get_vtb();
176 if (cpu_has_feature(CPU_FTR_ARCH_207S))
177 vcpu->arch.entry_ic = mfspr(SPRN_IC);
178 svcpu->in_use = true;
179 }
180
181 /* Copy data touched by real-mode code from shadow vcpu back to vcpu */
kvmppc_copy_from_svcpu(struct kvm_vcpu * vcpu,struct kvmppc_book3s_shadow_vcpu * svcpu)182 void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu,
183 struct kvmppc_book3s_shadow_vcpu *svcpu)
184 {
185 /*
186 * vcpu_put would just call us again because in_use hasn't
187 * been updated yet.
188 */
189 preempt_disable();
190
191 /*
192 * Maybe we were already preempted and synced the svcpu from
193 * our preempt notifiers. Don't bother touching this svcpu then.
194 */
195 if (!svcpu->in_use)
196 goto out;
197
198 vcpu->arch.gpr[0] = svcpu->gpr[0];
199 vcpu->arch.gpr[1] = svcpu->gpr[1];
200 vcpu->arch.gpr[2] = svcpu->gpr[2];
201 vcpu->arch.gpr[3] = svcpu->gpr[3];
202 vcpu->arch.gpr[4] = svcpu->gpr[4];
203 vcpu->arch.gpr[5] = svcpu->gpr[5];
204 vcpu->arch.gpr[6] = svcpu->gpr[6];
205 vcpu->arch.gpr[7] = svcpu->gpr[7];
206 vcpu->arch.gpr[8] = svcpu->gpr[8];
207 vcpu->arch.gpr[9] = svcpu->gpr[9];
208 vcpu->arch.gpr[10] = svcpu->gpr[10];
209 vcpu->arch.gpr[11] = svcpu->gpr[11];
210 vcpu->arch.gpr[12] = svcpu->gpr[12];
211 vcpu->arch.gpr[13] = svcpu->gpr[13];
212 vcpu->arch.cr = svcpu->cr;
213 vcpu->arch.xer = svcpu->xer;
214 vcpu->arch.ctr = svcpu->ctr;
215 vcpu->arch.lr = svcpu->lr;
216 vcpu->arch.pc = svcpu->pc;
217 vcpu->arch.shadow_srr1 = svcpu->shadow_srr1;
218 vcpu->arch.fault_dar = svcpu->fault_dar;
219 vcpu->arch.fault_dsisr = svcpu->fault_dsisr;
220 vcpu->arch.last_inst = svcpu->last_inst;
221 #ifdef CONFIG_PPC_BOOK3S_64
222 vcpu->arch.shadow_fscr = svcpu->shadow_fscr;
223 #endif
224 /*
225 * Update purr and spurr using time base on exit.
226 */
227 vcpu->arch.purr += get_tb() - vcpu->arch.entry_tb;
228 vcpu->arch.spurr += get_tb() - vcpu->arch.entry_tb;
229 to_book3s(vcpu)->vtb += get_vtb() - vcpu->arch.entry_vtb;
230 if (cpu_has_feature(CPU_FTR_ARCH_207S))
231 vcpu->arch.ic += mfspr(SPRN_IC) - vcpu->arch.entry_ic;
232 svcpu->in_use = false;
233
234 out:
235 preempt_enable();
236 }
237
kvmppc_core_check_requests_pr(struct kvm_vcpu * vcpu)238 static int kvmppc_core_check_requests_pr(struct kvm_vcpu *vcpu)
239 {
240 int r = 1; /* Indicate we want to get back into the guest */
241
242 /* We misuse TLB_FLUSH to indicate that we want to clear
243 all shadow cache entries */
244 if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu))
245 kvmppc_mmu_pte_flush(vcpu, 0, 0);
246
247 return r;
248 }
249
250 /************* MMU Notifiers *************/
do_kvm_unmap_hva(struct kvm * kvm,unsigned long start,unsigned long end)251 static void do_kvm_unmap_hva(struct kvm *kvm, unsigned long start,
252 unsigned long end)
253 {
254 long i;
255 struct kvm_vcpu *vcpu;
256 struct kvm_memslots *slots;
257 struct kvm_memory_slot *memslot;
258
259 slots = kvm_memslots(kvm);
260 kvm_for_each_memslot(memslot, slots) {
261 unsigned long hva_start, hva_end;
262 gfn_t gfn, gfn_end;
263
264 hva_start = max(start, memslot->userspace_addr);
265 hva_end = min(end, memslot->userspace_addr +
266 (memslot->npages << PAGE_SHIFT));
267 if (hva_start >= hva_end)
268 continue;
269 /*
270 * {gfn(page) | page intersects with [hva_start, hva_end)} =
271 * {gfn, gfn+1, ..., gfn_end-1}.
272 */
273 gfn = hva_to_gfn_memslot(hva_start, memslot);
274 gfn_end = hva_to_gfn_memslot(hva_end + PAGE_SIZE - 1, memslot);
275 kvm_for_each_vcpu(i, vcpu, kvm)
276 kvmppc_mmu_pte_pflush(vcpu, gfn << PAGE_SHIFT,
277 gfn_end << PAGE_SHIFT);
278 }
279 }
280
kvm_unmap_hva_pr(struct kvm * kvm,unsigned long hva)281 static int kvm_unmap_hva_pr(struct kvm *kvm, unsigned long hva)
282 {
283 trace_kvm_unmap_hva(hva);
284
285 do_kvm_unmap_hva(kvm, hva, hva + PAGE_SIZE);
286
287 return 0;
288 }
289
kvm_unmap_hva_range_pr(struct kvm * kvm,unsigned long start,unsigned long end)290 static int kvm_unmap_hva_range_pr(struct kvm *kvm, unsigned long start,
291 unsigned long end)
292 {
293 do_kvm_unmap_hva(kvm, start, end);
294
295 return 0;
296 }
297
kvm_age_hva_pr(struct kvm * kvm,unsigned long start,unsigned long end)298 static int kvm_age_hva_pr(struct kvm *kvm, unsigned long start,
299 unsigned long end)
300 {
301 /* XXX could be more clever ;) */
302 return 0;
303 }
304
kvm_test_age_hva_pr(struct kvm * kvm,unsigned long hva)305 static int kvm_test_age_hva_pr(struct kvm *kvm, unsigned long hva)
306 {
307 /* XXX could be more clever ;) */
308 return 0;
309 }
310
kvm_set_spte_hva_pr(struct kvm * kvm,unsigned long hva,pte_t pte)311 static void kvm_set_spte_hva_pr(struct kvm *kvm, unsigned long hva, pte_t pte)
312 {
313 /* The page will get remapped properly on its next fault */
314 do_kvm_unmap_hva(kvm, hva, hva + PAGE_SIZE);
315 }
316
317 /*****************************************/
318
kvmppc_recalc_shadow_msr(struct kvm_vcpu * vcpu)319 static void kvmppc_recalc_shadow_msr(struct kvm_vcpu *vcpu)
320 {
321 ulong guest_msr = kvmppc_get_msr(vcpu);
322 ulong smsr = guest_msr;
323
324 /* Guest MSR values */
325 smsr &= MSR_FE0 | MSR_FE1 | MSR_SF | MSR_SE | MSR_BE | MSR_LE;
326 /* Process MSR values */
327 smsr |= MSR_ME | MSR_RI | MSR_IR | MSR_DR | MSR_PR | MSR_EE;
328 /* External providers the guest reserved */
329 smsr |= (guest_msr & vcpu->arch.guest_owned_ext);
330 /* 64-bit Process MSR values */
331 #ifdef CONFIG_PPC_BOOK3S_64
332 smsr |= MSR_ISF | MSR_HV;
333 #endif
334 vcpu->arch.shadow_msr = smsr;
335 }
336
kvmppc_set_msr_pr(struct kvm_vcpu * vcpu,u64 msr)337 static void kvmppc_set_msr_pr(struct kvm_vcpu *vcpu, u64 msr)
338 {
339 ulong old_msr = kvmppc_get_msr(vcpu);
340
341 #ifdef EXIT_DEBUG
342 printk(KERN_INFO "KVM: Set MSR to 0x%llx\n", msr);
343 #endif
344
345 msr &= to_book3s(vcpu)->msr_mask;
346 kvmppc_set_msr_fast(vcpu, msr);
347 kvmppc_recalc_shadow_msr(vcpu);
348
349 if (msr & MSR_POW) {
350 if (!vcpu->arch.pending_exceptions) {
351 kvm_vcpu_block(vcpu);
352 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
353 vcpu->stat.halt_wakeup++;
354
355 /* Unset POW bit after we woke up */
356 msr &= ~MSR_POW;
357 kvmppc_set_msr_fast(vcpu, msr);
358 }
359 }
360
361 if (kvmppc_is_split_real(vcpu))
362 kvmppc_fixup_split_real(vcpu);
363 else
364 kvmppc_unfixup_split_real(vcpu);
365
366 if ((kvmppc_get_msr(vcpu) & (MSR_PR|MSR_IR|MSR_DR)) !=
367 (old_msr & (MSR_PR|MSR_IR|MSR_DR))) {
368 kvmppc_mmu_flush_segments(vcpu);
369 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
370
371 /* Preload magic page segment when in kernel mode */
372 if (!(msr & MSR_PR) && vcpu->arch.magic_page_pa) {
373 struct kvm_vcpu_arch *a = &vcpu->arch;
374
375 if (msr & MSR_DR)
376 kvmppc_mmu_map_segment(vcpu, a->magic_page_ea);
377 else
378 kvmppc_mmu_map_segment(vcpu, a->magic_page_pa);
379 }
380 }
381
382 /*
383 * When switching from 32 to 64-bit, we may have a stale 32-bit
384 * magic page around, we need to flush it. Typically 32-bit magic
385 * page will be instanciated when calling into RTAS. Note: We
386 * assume that such transition only happens while in kernel mode,
387 * ie, we never transition from user 32-bit to kernel 64-bit with
388 * a 32-bit magic page around.
389 */
390 if (vcpu->arch.magic_page_pa &&
391 !(old_msr & MSR_PR) && !(old_msr & MSR_SF) && (msr & MSR_SF)) {
392 /* going from RTAS to normal kernel code */
393 kvmppc_mmu_pte_flush(vcpu, (uint32_t)vcpu->arch.magic_page_pa,
394 ~0xFFFUL);
395 }
396
397 /* Preload FPU if it's enabled */
398 if (kvmppc_get_msr(vcpu) & MSR_FP)
399 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
400 }
401
kvmppc_set_pvr_pr(struct kvm_vcpu * vcpu,u32 pvr)402 void kvmppc_set_pvr_pr(struct kvm_vcpu *vcpu, u32 pvr)
403 {
404 u32 host_pvr;
405
406 vcpu->arch.hflags &= ~BOOK3S_HFLAG_SLB;
407 vcpu->arch.pvr = pvr;
408 #ifdef CONFIG_PPC_BOOK3S_64
409 if ((pvr >= 0x330000) && (pvr < 0x70330000)) {
410 kvmppc_mmu_book3s_64_init(vcpu);
411 if (!to_book3s(vcpu)->hior_explicit)
412 to_book3s(vcpu)->hior = 0xfff00000;
413 to_book3s(vcpu)->msr_mask = 0xffffffffffffffffULL;
414 vcpu->arch.cpu_type = KVM_CPU_3S_64;
415 } else
416 #endif
417 {
418 kvmppc_mmu_book3s_32_init(vcpu);
419 if (!to_book3s(vcpu)->hior_explicit)
420 to_book3s(vcpu)->hior = 0;
421 to_book3s(vcpu)->msr_mask = 0xffffffffULL;
422 vcpu->arch.cpu_type = KVM_CPU_3S_32;
423 }
424
425 kvmppc_sanity_check(vcpu);
426
427 /* If we are in hypervisor level on 970, we can tell the CPU to
428 * treat DCBZ as 32 bytes store */
429 vcpu->arch.hflags &= ~BOOK3S_HFLAG_DCBZ32;
430 if (vcpu->arch.mmu.is_dcbz32(vcpu) && (mfmsr() & MSR_HV) &&
431 !strcmp(cur_cpu_spec->platform, "ppc970"))
432 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
433
434 /* Cell performs badly if MSR_FEx are set. So let's hope nobody
435 really needs them in a VM on Cell and force disable them. */
436 if (!strcmp(cur_cpu_spec->platform, "ppc-cell-be"))
437 to_book3s(vcpu)->msr_mask &= ~(MSR_FE0 | MSR_FE1);
438
439 /*
440 * If they're asking for POWER6 or later, set the flag
441 * indicating that we can do multiple large page sizes
442 * and 1TB segments.
443 * Also set the flag that indicates that tlbie has the large
444 * page bit in the RB operand instead of the instruction.
445 */
446 switch (PVR_VER(pvr)) {
447 case PVR_POWER6:
448 case PVR_POWER7:
449 case PVR_POWER7p:
450 case PVR_POWER8:
451 case PVR_POWER8E:
452 case PVR_POWER8NVL:
453 vcpu->arch.hflags |= BOOK3S_HFLAG_MULTI_PGSIZE |
454 BOOK3S_HFLAG_NEW_TLBIE;
455 break;
456 }
457
458 #ifdef CONFIG_PPC_BOOK3S_32
459 /* 32 bit Book3S always has 32 byte dcbz */
460 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
461 #endif
462
463 /* On some CPUs we can execute paired single operations natively */
464 asm ( "mfpvr %0" : "=r"(host_pvr));
465 switch (host_pvr) {
466 case 0x00080200: /* lonestar 2.0 */
467 case 0x00088202: /* lonestar 2.2 */
468 case 0x70000100: /* gekko 1.0 */
469 case 0x00080100: /* gekko 2.0 */
470 case 0x00083203: /* gekko 2.3a */
471 case 0x00083213: /* gekko 2.3b */
472 case 0x00083204: /* gekko 2.4 */
473 case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */
474 case 0x00087200: /* broadway */
475 vcpu->arch.hflags |= BOOK3S_HFLAG_NATIVE_PS;
476 /* Enable HID2.PSE - in case we need it later */
477 mtspr(SPRN_HID2_GEKKO, mfspr(SPRN_HID2_GEKKO) | (1 << 29));
478 }
479 }
480
481 /* Book3s_32 CPUs always have 32 bytes cache line size, which Linux assumes. To
482 * make Book3s_32 Linux work on Book3s_64, we have to make sure we trap dcbz to
483 * emulate 32 bytes dcbz length.
484 *
485 * The Book3s_64 inventors also realized this case and implemented a special bit
486 * in the HID5 register, which is a hypervisor ressource. Thus we can't use it.
487 *
488 * My approach here is to patch the dcbz instruction on executing pages.
489 */
kvmppc_patch_dcbz(struct kvm_vcpu * vcpu,struct kvmppc_pte * pte)490 static void kvmppc_patch_dcbz(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte)
491 {
492 struct page *hpage;
493 u64 hpage_offset;
494 u32 *page;
495 int i;
496
497 hpage = gfn_to_page(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
498 if (is_error_page(hpage))
499 return;
500
501 hpage_offset = pte->raddr & ~PAGE_MASK;
502 hpage_offset &= ~0xFFFULL;
503 hpage_offset /= 4;
504
505 get_page(hpage);
506 page = kmap_atomic(hpage);
507
508 /* patch dcbz into reserved instruction, so we trap */
509 for (i=hpage_offset; i < hpage_offset + (HW_PAGE_SIZE / 4); i++)
510 if ((be32_to_cpu(page[i]) & 0xff0007ff) == INS_DCBZ)
511 page[i] &= cpu_to_be32(0xfffffff7);
512
513 kunmap_atomic(page);
514 put_page(hpage);
515 }
516
kvmppc_visible_gpa(struct kvm_vcpu * vcpu,gpa_t gpa)517 static bool kvmppc_visible_gpa(struct kvm_vcpu *vcpu, gpa_t gpa)
518 {
519 ulong mp_pa = vcpu->arch.magic_page_pa;
520
521 if (!(kvmppc_get_msr(vcpu) & MSR_SF))
522 mp_pa = (uint32_t)mp_pa;
523
524 gpa &= ~0xFFFULL;
525 if (unlikely(mp_pa) && unlikely((mp_pa & KVM_PAM) == (gpa & KVM_PAM))) {
526 return true;
527 }
528
529 return kvm_is_visible_gfn(vcpu->kvm, gpa >> PAGE_SHIFT);
530 }
531
kvmppc_handle_pagefault(struct kvm_run * run,struct kvm_vcpu * vcpu,ulong eaddr,int vec)532 int kvmppc_handle_pagefault(struct kvm_run *run, struct kvm_vcpu *vcpu,
533 ulong eaddr, int vec)
534 {
535 bool data = (vec == BOOK3S_INTERRUPT_DATA_STORAGE);
536 bool iswrite = false;
537 int r = RESUME_GUEST;
538 int relocated;
539 int page_found = 0;
540 struct kvmppc_pte pte;
541 bool is_mmio = false;
542 bool dr = (kvmppc_get_msr(vcpu) & MSR_DR) ? true : false;
543 bool ir = (kvmppc_get_msr(vcpu) & MSR_IR) ? true : false;
544 u64 vsid;
545
546 relocated = data ? dr : ir;
547 if (data && (vcpu->arch.fault_dsisr & DSISR_ISSTORE))
548 iswrite = true;
549
550 /* Resolve real address if translation turned on */
551 if (relocated) {
552 page_found = vcpu->arch.mmu.xlate(vcpu, eaddr, &pte, data, iswrite);
553 } else {
554 pte.may_execute = true;
555 pte.may_read = true;
556 pte.may_write = true;
557 pte.raddr = eaddr & KVM_PAM;
558 pte.eaddr = eaddr;
559 pte.vpage = eaddr >> 12;
560 pte.page_size = MMU_PAGE_64K;
561 }
562
563 switch (kvmppc_get_msr(vcpu) & (MSR_DR|MSR_IR)) {
564 case 0:
565 pte.vpage |= ((u64)VSID_REAL << (SID_SHIFT - 12));
566 break;
567 case MSR_DR:
568 if (!data &&
569 (vcpu->arch.hflags & BOOK3S_HFLAG_SPLIT_HACK) &&
570 ((pte.raddr & SPLIT_HACK_MASK) == SPLIT_HACK_OFFS))
571 pte.raddr &= ~SPLIT_HACK_MASK;
572 /* fall through */
573 case MSR_IR:
574 vcpu->arch.mmu.esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
575
576 if ((kvmppc_get_msr(vcpu) & (MSR_DR|MSR_IR)) == MSR_DR)
577 pte.vpage |= ((u64)VSID_REAL_DR << (SID_SHIFT - 12));
578 else
579 pte.vpage |= ((u64)VSID_REAL_IR << (SID_SHIFT - 12));
580 pte.vpage |= vsid;
581
582 if (vsid == -1)
583 page_found = -EINVAL;
584 break;
585 }
586
587 if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
588 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
589 /*
590 * If we do the dcbz hack, we have to NX on every execution,
591 * so we can patch the executing code. This renders our guest
592 * NX-less.
593 */
594 pte.may_execute = !data;
595 }
596
597 if (page_found == -ENOENT) {
598 /* Page not found in guest PTE entries */
599 u64 ssrr1 = vcpu->arch.shadow_srr1;
600 u64 msr = kvmppc_get_msr(vcpu);
601 kvmppc_set_dar(vcpu, kvmppc_get_fault_dar(vcpu));
602 kvmppc_set_dsisr(vcpu, vcpu->arch.fault_dsisr);
603 kvmppc_set_msr_fast(vcpu, msr | (ssrr1 & 0xf8000000ULL));
604 kvmppc_book3s_queue_irqprio(vcpu, vec);
605 } else if (page_found == -EPERM) {
606 /* Storage protection */
607 u32 dsisr = vcpu->arch.fault_dsisr;
608 u64 ssrr1 = vcpu->arch.shadow_srr1;
609 u64 msr = kvmppc_get_msr(vcpu);
610 kvmppc_set_dar(vcpu, kvmppc_get_fault_dar(vcpu));
611 dsisr = (dsisr & ~DSISR_NOHPTE) | DSISR_PROTFAULT;
612 kvmppc_set_dsisr(vcpu, dsisr);
613 kvmppc_set_msr_fast(vcpu, msr | (ssrr1 & 0xf8000000ULL));
614 kvmppc_book3s_queue_irqprio(vcpu, vec);
615 } else if (page_found == -EINVAL) {
616 /* Page not found in guest SLB */
617 kvmppc_set_dar(vcpu, kvmppc_get_fault_dar(vcpu));
618 kvmppc_book3s_queue_irqprio(vcpu, vec + 0x80);
619 } else if (!is_mmio &&
620 kvmppc_visible_gpa(vcpu, pte.raddr)) {
621 if (data && !(vcpu->arch.fault_dsisr & DSISR_NOHPTE)) {
622 /*
623 * There is already a host HPTE there, presumably
624 * a read-only one for a page the guest thinks
625 * is writable, so get rid of it first.
626 */
627 kvmppc_mmu_unmap_page(vcpu, &pte);
628 }
629 /* The guest's PTE is not mapped yet. Map on the host */
630 if (kvmppc_mmu_map_page(vcpu, &pte, iswrite) == -EIO) {
631 /* Exit KVM if mapping failed */
632 run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
633 return RESUME_HOST;
634 }
635 if (data)
636 vcpu->stat.sp_storage++;
637 else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
638 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32)))
639 kvmppc_patch_dcbz(vcpu, &pte);
640 } else {
641 /* MMIO */
642 vcpu->stat.mmio_exits++;
643 vcpu->arch.paddr_accessed = pte.raddr;
644 vcpu->arch.vaddr_accessed = pte.eaddr;
645 r = kvmppc_emulate_mmio(run, vcpu);
646 if ( r == RESUME_HOST_NV )
647 r = RESUME_HOST;
648 }
649
650 return r;
651 }
652
653 /* Give up external provider (FPU, Altivec, VSX) */
kvmppc_giveup_ext(struct kvm_vcpu * vcpu,ulong msr)654 void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr)
655 {
656 struct thread_struct *t = ¤t->thread;
657
658 /*
659 * VSX instructions can access FP and vector registers, so if
660 * we are giving up VSX, make sure we give up FP and VMX as well.
661 */
662 if (msr & MSR_VSX)
663 msr |= MSR_FP | MSR_VEC;
664
665 msr &= vcpu->arch.guest_owned_ext;
666 if (!msr)
667 return;
668
669 #ifdef DEBUG_EXT
670 printk(KERN_INFO "Giving up ext 0x%lx\n", msr);
671 #endif
672
673 if (msr & MSR_FP) {
674 /*
675 * Note that on CPUs with VSX, giveup_fpu stores
676 * both the traditional FP registers and the added VSX
677 * registers into thread.fp_state.fpr[].
678 */
679 if (t->regs->msr & MSR_FP)
680 giveup_fpu(current);
681 t->fp_save_area = NULL;
682 }
683
684 #ifdef CONFIG_ALTIVEC
685 if (msr & MSR_VEC) {
686 if (current->thread.regs->msr & MSR_VEC)
687 giveup_altivec(current);
688 t->vr_save_area = NULL;
689 }
690 #endif
691
692 vcpu->arch.guest_owned_ext &= ~(msr | MSR_VSX);
693 kvmppc_recalc_shadow_msr(vcpu);
694 }
695
696 /* Give up facility (TAR / EBB / DSCR) */
kvmppc_giveup_fac(struct kvm_vcpu * vcpu,ulong fac)697 static void kvmppc_giveup_fac(struct kvm_vcpu *vcpu, ulong fac)
698 {
699 #ifdef CONFIG_PPC_BOOK3S_64
700 if (!(vcpu->arch.shadow_fscr & (1ULL << fac))) {
701 /* Facility not available to the guest, ignore giveup request*/
702 return;
703 }
704
705 switch (fac) {
706 case FSCR_TAR_LG:
707 vcpu->arch.tar = mfspr(SPRN_TAR);
708 mtspr(SPRN_TAR, current->thread.tar);
709 vcpu->arch.shadow_fscr &= ~FSCR_TAR;
710 break;
711 }
712 #endif
713 }
714
715 /* Handle external providers (FPU, Altivec, VSX) */
kvmppc_handle_ext(struct kvm_vcpu * vcpu,unsigned int exit_nr,ulong msr)716 static int kvmppc_handle_ext(struct kvm_vcpu *vcpu, unsigned int exit_nr,
717 ulong msr)
718 {
719 struct thread_struct *t = ¤t->thread;
720
721 /* When we have paired singles, we emulate in software */
722 if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE)
723 return RESUME_GUEST;
724
725 if (!(kvmppc_get_msr(vcpu) & msr)) {
726 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
727 return RESUME_GUEST;
728 }
729
730 if (msr == MSR_VSX) {
731 /* No VSX? Give an illegal instruction interrupt */
732 #ifdef CONFIG_VSX
733 if (!cpu_has_feature(CPU_FTR_VSX))
734 #endif
735 {
736 kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
737 return RESUME_GUEST;
738 }
739
740 /*
741 * We have to load up all the FP and VMX registers before
742 * we can let the guest use VSX instructions.
743 */
744 msr = MSR_FP | MSR_VEC | MSR_VSX;
745 }
746
747 /* See if we already own all the ext(s) needed */
748 msr &= ~vcpu->arch.guest_owned_ext;
749 if (!msr)
750 return RESUME_GUEST;
751
752 #ifdef DEBUG_EXT
753 printk(KERN_INFO "Loading up ext 0x%lx\n", msr);
754 #endif
755
756 if (msr & MSR_FP) {
757 preempt_disable();
758 enable_kernel_fp();
759 load_fp_state(&vcpu->arch.fp);
760 disable_kernel_fp();
761 t->fp_save_area = &vcpu->arch.fp;
762 preempt_enable();
763 }
764
765 if (msr & MSR_VEC) {
766 #ifdef CONFIG_ALTIVEC
767 preempt_disable();
768 enable_kernel_altivec();
769 load_vr_state(&vcpu->arch.vr);
770 disable_kernel_altivec();
771 t->vr_save_area = &vcpu->arch.vr;
772 preempt_enable();
773 #endif
774 }
775
776 t->regs->msr |= msr;
777 vcpu->arch.guest_owned_ext |= msr;
778 kvmppc_recalc_shadow_msr(vcpu);
779
780 return RESUME_GUEST;
781 }
782
783 /*
784 * Kernel code using FP or VMX could have flushed guest state to
785 * the thread_struct; if so, get it back now.
786 */
kvmppc_handle_lost_ext(struct kvm_vcpu * vcpu)787 static void kvmppc_handle_lost_ext(struct kvm_vcpu *vcpu)
788 {
789 unsigned long lost_ext;
790
791 lost_ext = vcpu->arch.guest_owned_ext & ~current->thread.regs->msr;
792 if (!lost_ext)
793 return;
794
795 if (lost_ext & MSR_FP) {
796 preempt_disable();
797 enable_kernel_fp();
798 load_fp_state(&vcpu->arch.fp);
799 disable_kernel_fp();
800 preempt_enable();
801 }
802 #ifdef CONFIG_ALTIVEC
803 if (lost_ext & MSR_VEC) {
804 preempt_disable();
805 enable_kernel_altivec();
806 load_vr_state(&vcpu->arch.vr);
807 disable_kernel_altivec();
808 preempt_enable();
809 }
810 #endif
811 current->thread.regs->msr |= lost_ext;
812 }
813
814 #ifdef CONFIG_PPC_BOOK3S_64
815
kvmppc_trigger_fac_interrupt(struct kvm_vcpu * vcpu,ulong fac)816 static void kvmppc_trigger_fac_interrupt(struct kvm_vcpu *vcpu, ulong fac)
817 {
818 /* Inject the Interrupt Cause field and trigger a guest interrupt */
819 vcpu->arch.fscr &= ~(0xffULL << 56);
820 vcpu->arch.fscr |= (fac << 56);
821 kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_FAC_UNAVAIL);
822 }
823
kvmppc_emulate_fac(struct kvm_vcpu * vcpu,ulong fac)824 static void kvmppc_emulate_fac(struct kvm_vcpu *vcpu, ulong fac)
825 {
826 enum emulation_result er = EMULATE_FAIL;
827
828 if (!(kvmppc_get_msr(vcpu) & MSR_PR))
829 er = kvmppc_emulate_instruction(vcpu->run, vcpu);
830
831 if ((er != EMULATE_DONE) && (er != EMULATE_AGAIN)) {
832 /* Couldn't emulate, trigger interrupt in guest */
833 kvmppc_trigger_fac_interrupt(vcpu, fac);
834 }
835 }
836
837 /* Enable facilities (TAR, EBB, DSCR) for the guest */
kvmppc_handle_fac(struct kvm_vcpu * vcpu,ulong fac)838 static int kvmppc_handle_fac(struct kvm_vcpu *vcpu, ulong fac)
839 {
840 bool guest_fac_enabled;
841 BUG_ON(!cpu_has_feature(CPU_FTR_ARCH_207S));
842
843 /*
844 * Not every facility is enabled by FSCR bits, check whether the
845 * guest has this facility enabled at all.
846 */
847 switch (fac) {
848 case FSCR_TAR_LG:
849 case FSCR_EBB_LG:
850 guest_fac_enabled = (vcpu->arch.fscr & (1ULL << fac));
851 break;
852 case FSCR_TM_LG:
853 guest_fac_enabled = kvmppc_get_msr(vcpu) & MSR_TM;
854 break;
855 default:
856 guest_fac_enabled = false;
857 break;
858 }
859
860 if (!guest_fac_enabled) {
861 /* Facility not enabled by the guest */
862 kvmppc_trigger_fac_interrupt(vcpu, fac);
863 return RESUME_GUEST;
864 }
865
866 switch (fac) {
867 case FSCR_TAR_LG:
868 /* TAR switching isn't lazy in Linux yet */
869 current->thread.tar = mfspr(SPRN_TAR);
870 mtspr(SPRN_TAR, vcpu->arch.tar);
871 vcpu->arch.shadow_fscr |= FSCR_TAR;
872 break;
873 default:
874 kvmppc_emulate_fac(vcpu, fac);
875 break;
876 }
877
878 return RESUME_GUEST;
879 }
880
kvmppc_set_fscr(struct kvm_vcpu * vcpu,u64 fscr)881 void kvmppc_set_fscr(struct kvm_vcpu *vcpu, u64 fscr)
882 {
883 if ((vcpu->arch.fscr & FSCR_TAR) && !(fscr & FSCR_TAR)) {
884 /* TAR got dropped, drop it in shadow too */
885 kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
886 }
887 vcpu->arch.fscr = fscr;
888 }
889 #endif
890
kvmppc_setup_debug(struct kvm_vcpu * vcpu)891 static void kvmppc_setup_debug(struct kvm_vcpu *vcpu)
892 {
893 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
894 u64 msr = kvmppc_get_msr(vcpu);
895
896 kvmppc_set_msr(vcpu, msr | MSR_SE);
897 }
898 }
899
kvmppc_clear_debug(struct kvm_vcpu * vcpu)900 static void kvmppc_clear_debug(struct kvm_vcpu *vcpu)
901 {
902 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
903 u64 msr = kvmppc_get_msr(vcpu);
904
905 kvmppc_set_msr(vcpu, msr & ~MSR_SE);
906 }
907 }
908
kvmppc_handle_exit_pr(struct kvm_run * run,struct kvm_vcpu * vcpu,unsigned int exit_nr)909 int kvmppc_handle_exit_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
910 unsigned int exit_nr)
911 {
912 int r = RESUME_HOST;
913 int s;
914
915 vcpu->stat.sum_exits++;
916
917 run->exit_reason = KVM_EXIT_UNKNOWN;
918 run->ready_for_interrupt_injection = 1;
919
920 /* We get here with MSR.EE=1 */
921
922 trace_kvm_exit(exit_nr, vcpu);
923 guest_exit();
924
925 switch (exit_nr) {
926 case BOOK3S_INTERRUPT_INST_STORAGE:
927 {
928 ulong shadow_srr1 = vcpu->arch.shadow_srr1;
929 vcpu->stat.pf_instruc++;
930
931 if (kvmppc_is_split_real(vcpu))
932 kvmppc_fixup_split_real(vcpu);
933
934 #ifdef CONFIG_PPC_BOOK3S_32
935 /* We set segments as unused segments when invalidating them. So
936 * treat the respective fault as segment fault. */
937 {
938 struct kvmppc_book3s_shadow_vcpu *svcpu;
939 u32 sr;
940
941 svcpu = svcpu_get(vcpu);
942 sr = svcpu->sr[kvmppc_get_pc(vcpu) >> SID_SHIFT];
943 svcpu_put(svcpu);
944 if (sr == SR_INVALID) {
945 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
946 r = RESUME_GUEST;
947 break;
948 }
949 }
950 #endif
951
952 /* only care about PTEG not found errors, but leave NX alone */
953 if (shadow_srr1 & 0x40000000) {
954 int idx = srcu_read_lock(&vcpu->kvm->srcu);
955 r = kvmppc_handle_pagefault(run, vcpu, kvmppc_get_pc(vcpu), exit_nr);
956 srcu_read_unlock(&vcpu->kvm->srcu, idx);
957 vcpu->stat.sp_instruc++;
958 } else if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
959 (!(vcpu->arch.hflags & BOOK3S_HFLAG_DCBZ32))) {
960 /*
961 * XXX If we do the dcbz hack we use the NX bit to flush&patch the page,
962 * so we can't use the NX bit inside the guest. Let's cross our fingers,
963 * that no guest that needs the dcbz hack does NX.
964 */
965 kvmppc_mmu_pte_flush(vcpu, kvmppc_get_pc(vcpu), ~0xFFFUL);
966 r = RESUME_GUEST;
967 } else {
968 u64 msr = kvmppc_get_msr(vcpu);
969 msr |= shadow_srr1 & 0x58000000;
970 kvmppc_set_msr_fast(vcpu, msr);
971 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
972 r = RESUME_GUEST;
973 }
974 break;
975 }
976 case BOOK3S_INTERRUPT_DATA_STORAGE:
977 {
978 ulong dar = kvmppc_get_fault_dar(vcpu);
979 u32 fault_dsisr = vcpu->arch.fault_dsisr;
980 vcpu->stat.pf_storage++;
981
982 #ifdef CONFIG_PPC_BOOK3S_32
983 /* We set segments as unused segments when invalidating them. So
984 * treat the respective fault as segment fault. */
985 {
986 struct kvmppc_book3s_shadow_vcpu *svcpu;
987 u32 sr;
988
989 svcpu = svcpu_get(vcpu);
990 sr = svcpu->sr[dar >> SID_SHIFT];
991 svcpu_put(svcpu);
992 if (sr == SR_INVALID) {
993 kvmppc_mmu_map_segment(vcpu, dar);
994 r = RESUME_GUEST;
995 break;
996 }
997 }
998 #endif
999
1000 /*
1001 * We need to handle missing shadow PTEs, and
1002 * protection faults due to us mapping a page read-only
1003 * when the guest thinks it is writable.
1004 */
1005 if (fault_dsisr & (DSISR_NOHPTE | DSISR_PROTFAULT)) {
1006 int idx = srcu_read_lock(&vcpu->kvm->srcu);
1007 r = kvmppc_handle_pagefault(run, vcpu, dar, exit_nr);
1008 srcu_read_unlock(&vcpu->kvm->srcu, idx);
1009 } else {
1010 kvmppc_set_dar(vcpu, dar);
1011 kvmppc_set_dsisr(vcpu, fault_dsisr);
1012 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1013 r = RESUME_GUEST;
1014 }
1015 break;
1016 }
1017 case BOOK3S_INTERRUPT_DATA_SEGMENT:
1018 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_fault_dar(vcpu)) < 0) {
1019 kvmppc_set_dar(vcpu, kvmppc_get_fault_dar(vcpu));
1020 kvmppc_book3s_queue_irqprio(vcpu,
1021 BOOK3S_INTERRUPT_DATA_SEGMENT);
1022 }
1023 r = RESUME_GUEST;
1024 break;
1025 case BOOK3S_INTERRUPT_INST_SEGMENT:
1026 if (kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu)) < 0) {
1027 kvmppc_book3s_queue_irqprio(vcpu,
1028 BOOK3S_INTERRUPT_INST_SEGMENT);
1029 }
1030 r = RESUME_GUEST;
1031 break;
1032 /* We're good on these - the host merely wanted to get our attention */
1033 case BOOK3S_INTERRUPT_DECREMENTER:
1034 case BOOK3S_INTERRUPT_HV_DECREMENTER:
1035 case BOOK3S_INTERRUPT_DOORBELL:
1036 case BOOK3S_INTERRUPT_H_DOORBELL:
1037 vcpu->stat.dec_exits++;
1038 r = RESUME_GUEST;
1039 break;
1040 case BOOK3S_INTERRUPT_EXTERNAL:
1041 case BOOK3S_INTERRUPT_EXTERNAL_LEVEL:
1042 case BOOK3S_INTERRUPT_EXTERNAL_HV:
1043 vcpu->stat.ext_intr_exits++;
1044 r = RESUME_GUEST;
1045 break;
1046 case BOOK3S_INTERRUPT_PERFMON:
1047 r = RESUME_GUEST;
1048 break;
1049 case BOOK3S_INTERRUPT_PROGRAM:
1050 case BOOK3S_INTERRUPT_H_EMUL_ASSIST:
1051 {
1052 enum emulation_result er;
1053 ulong flags;
1054 u32 last_inst;
1055 int emul;
1056
1057 program_interrupt:
1058 /*
1059 * shadow_srr1 only contains valid flags if we came here via
1060 * a program exception. The other exceptions (emulation assist,
1061 * FP unavailable, etc.) do not provide flags in SRR1, so use
1062 * an illegal-instruction exception when injecting a program
1063 * interrupt into the guest.
1064 */
1065 if (exit_nr == BOOK3S_INTERRUPT_PROGRAM)
1066 flags = vcpu->arch.shadow_srr1 & 0x1f0000ull;
1067 else
1068 flags = SRR1_PROGILL;
1069
1070 emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
1071 if (emul != EMULATE_DONE) {
1072 r = RESUME_GUEST;
1073 break;
1074 }
1075
1076 if (kvmppc_get_msr(vcpu) & MSR_PR) {
1077 #ifdef EXIT_DEBUG
1078 pr_info("Userspace triggered 0x700 exception at\n 0x%lx (0x%x)\n",
1079 kvmppc_get_pc(vcpu), last_inst);
1080 #endif
1081 if ((last_inst & 0xff0007ff) !=
1082 (INS_DCBZ & 0xfffffff7)) {
1083 kvmppc_core_queue_program(vcpu, flags);
1084 r = RESUME_GUEST;
1085 break;
1086 }
1087 }
1088
1089 vcpu->stat.emulated_inst_exits++;
1090 er = kvmppc_emulate_instruction(run, vcpu);
1091 switch (er) {
1092 case EMULATE_DONE:
1093 r = RESUME_GUEST_NV;
1094 break;
1095 case EMULATE_AGAIN:
1096 r = RESUME_GUEST;
1097 break;
1098 case EMULATE_FAIL:
1099 printk(KERN_CRIT "%s: emulation at %lx failed (%08x)\n",
1100 __func__, kvmppc_get_pc(vcpu), last_inst);
1101 kvmppc_core_queue_program(vcpu, flags);
1102 r = RESUME_GUEST;
1103 break;
1104 case EMULATE_DO_MMIO:
1105 run->exit_reason = KVM_EXIT_MMIO;
1106 r = RESUME_HOST_NV;
1107 break;
1108 case EMULATE_EXIT_USER:
1109 r = RESUME_HOST_NV;
1110 break;
1111 default:
1112 BUG();
1113 }
1114 break;
1115 }
1116 case BOOK3S_INTERRUPT_SYSCALL:
1117 {
1118 u32 last_sc;
1119 int emul;
1120
1121 /* Get last sc for papr */
1122 if (vcpu->arch.papr_enabled) {
1123 /* The sc instuction points SRR0 to the next inst */
1124 emul = kvmppc_get_last_inst(vcpu, INST_SC, &last_sc);
1125 if (emul != EMULATE_DONE) {
1126 kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) - 4);
1127 r = RESUME_GUEST;
1128 break;
1129 }
1130 }
1131
1132 if (vcpu->arch.papr_enabled &&
1133 (last_sc == 0x44000022) &&
1134 !(kvmppc_get_msr(vcpu) & MSR_PR)) {
1135 /* SC 1 papr hypercalls */
1136 ulong cmd = kvmppc_get_gpr(vcpu, 3);
1137 int i;
1138
1139 #ifdef CONFIG_PPC_BOOK3S_64
1140 if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE) {
1141 r = RESUME_GUEST;
1142 break;
1143 }
1144 #endif
1145
1146 run->papr_hcall.nr = cmd;
1147 for (i = 0; i < 9; ++i) {
1148 ulong gpr = kvmppc_get_gpr(vcpu, 4 + i);
1149 run->papr_hcall.args[i] = gpr;
1150 }
1151 run->exit_reason = KVM_EXIT_PAPR_HCALL;
1152 vcpu->arch.hcall_needed = 1;
1153 r = RESUME_HOST;
1154 } else if (vcpu->arch.osi_enabled &&
1155 (((u32)kvmppc_get_gpr(vcpu, 3)) == OSI_SC_MAGIC_R3) &&
1156 (((u32)kvmppc_get_gpr(vcpu, 4)) == OSI_SC_MAGIC_R4)) {
1157 /* MOL hypercalls */
1158 u64 *gprs = run->osi.gprs;
1159 int i;
1160
1161 run->exit_reason = KVM_EXIT_OSI;
1162 for (i = 0; i < 32; i++)
1163 gprs[i] = kvmppc_get_gpr(vcpu, i);
1164 vcpu->arch.osi_needed = 1;
1165 r = RESUME_HOST_NV;
1166 } else if (!(kvmppc_get_msr(vcpu) & MSR_PR) &&
1167 (((u32)kvmppc_get_gpr(vcpu, 0)) == KVM_SC_MAGIC_R0)) {
1168 /* KVM PV hypercalls */
1169 kvmppc_set_gpr(vcpu, 3, kvmppc_kvm_pv(vcpu));
1170 r = RESUME_GUEST;
1171 } else {
1172 /* Guest syscalls */
1173 vcpu->stat.syscall_exits++;
1174 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1175 r = RESUME_GUEST;
1176 }
1177 break;
1178 }
1179 case BOOK3S_INTERRUPT_FP_UNAVAIL:
1180 case BOOK3S_INTERRUPT_ALTIVEC:
1181 case BOOK3S_INTERRUPT_VSX:
1182 {
1183 int ext_msr = 0;
1184 int emul;
1185 u32 last_inst;
1186
1187 if (vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE) {
1188 /* Do paired single instruction emulation */
1189 emul = kvmppc_get_last_inst(vcpu, INST_GENERIC,
1190 &last_inst);
1191 if (emul == EMULATE_DONE)
1192 goto program_interrupt;
1193 else
1194 r = RESUME_GUEST;
1195
1196 break;
1197 }
1198
1199 /* Enable external provider */
1200 switch (exit_nr) {
1201 case BOOK3S_INTERRUPT_FP_UNAVAIL:
1202 ext_msr = MSR_FP;
1203 break;
1204
1205 case BOOK3S_INTERRUPT_ALTIVEC:
1206 ext_msr = MSR_VEC;
1207 break;
1208
1209 case BOOK3S_INTERRUPT_VSX:
1210 ext_msr = MSR_VSX;
1211 break;
1212 }
1213
1214 r = kvmppc_handle_ext(vcpu, exit_nr, ext_msr);
1215 break;
1216 }
1217 case BOOK3S_INTERRUPT_ALIGNMENT:
1218 {
1219 u32 last_inst;
1220 int emul = kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
1221
1222 if (emul == EMULATE_DONE) {
1223 u32 dsisr;
1224 u64 dar;
1225
1226 dsisr = kvmppc_alignment_dsisr(vcpu, last_inst);
1227 dar = kvmppc_alignment_dar(vcpu, last_inst);
1228
1229 kvmppc_set_dsisr(vcpu, dsisr);
1230 kvmppc_set_dar(vcpu, dar);
1231
1232 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1233 }
1234 r = RESUME_GUEST;
1235 break;
1236 }
1237 #ifdef CONFIG_PPC_BOOK3S_64
1238 case BOOK3S_INTERRUPT_FAC_UNAVAIL:
1239 kvmppc_handle_fac(vcpu, vcpu->arch.shadow_fscr >> 56);
1240 r = RESUME_GUEST;
1241 break;
1242 #endif
1243 case BOOK3S_INTERRUPT_MACHINE_CHECK:
1244 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1245 r = RESUME_GUEST;
1246 break;
1247 case BOOK3S_INTERRUPT_TRACE:
1248 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) {
1249 run->exit_reason = KVM_EXIT_DEBUG;
1250 r = RESUME_HOST;
1251 } else {
1252 kvmppc_book3s_queue_irqprio(vcpu, exit_nr);
1253 r = RESUME_GUEST;
1254 }
1255 break;
1256 default:
1257 {
1258 ulong shadow_srr1 = vcpu->arch.shadow_srr1;
1259 /* Ugh - bork here! What did we get? */
1260 printk(KERN_EMERG "exit_nr=0x%x | pc=0x%lx | msr=0x%lx\n",
1261 exit_nr, kvmppc_get_pc(vcpu), shadow_srr1);
1262 r = RESUME_HOST;
1263 BUG();
1264 break;
1265 }
1266 }
1267
1268 if (!(r & RESUME_HOST)) {
1269 /* To avoid clobbering exit_reason, only check for signals if
1270 * we aren't already exiting to userspace for some other
1271 * reason. */
1272
1273 /*
1274 * Interrupts could be timers for the guest which we have to
1275 * inject again, so let's postpone them until we're in the guest
1276 * and if we really did time things so badly, then we just exit
1277 * again due to a host external interrupt.
1278 */
1279 s = kvmppc_prepare_to_enter(vcpu);
1280 if (s <= 0)
1281 r = s;
1282 else {
1283 /* interrupts now hard-disabled */
1284 kvmppc_fix_ee_before_entry();
1285 }
1286
1287 kvmppc_handle_lost_ext(vcpu);
1288 }
1289
1290 trace_kvm_book3s_reenter(r, vcpu);
1291
1292 return r;
1293 }
1294
kvm_arch_vcpu_ioctl_get_sregs_pr(struct kvm_vcpu * vcpu,struct kvm_sregs * sregs)1295 static int kvm_arch_vcpu_ioctl_get_sregs_pr(struct kvm_vcpu *vcpu,
1296 struct kvm_sregs *sregs)
1297 {
1298 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1299 int i;
1300
1301 sregs->pvr = vcpu->arch.pvr;
1302
1303 sregs->u.s.sdr1 = to_book3s(vcpu)->sdr1;
1304 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1305 for (i = 0; i < 64; i++) {
1306 sregs->u.s.ppc64.slb[i].slbe = vcpu->arch.slb[i].orige | i;
1307 sregs->u.s.ppc64.slb[i].slbv = vcpu->arch.slb[i].origv;
1308 }
1309 } else {
1310 for (i = 0; i < 16; i++)
1311 sregs->u.s.ppc32.sr[i] = kvmppc_get_sr(vcpu, i);
1312
1313 for (i = 0; i < 8; i++) {
1314 sregs->u.s.ppc32.ibat[i] = vcpu3s->ibat[i].raw;
1315 sregs->u.s.ppc32.dbat[i] = vcpu3s->dbat[i].raw;
1316 }
1317 }
1318
1319 return 0;
1320 }
1321
kvm_arch_vcpu_ioctl_set_sregs_pr(struct kvm_vcpu * vcpu,struct kvm_sregs * sregs)1322 static int kvm_arch_vcpu_ioctl_set_sregs_pr(struct kvm_vcpu *vcpu,
1323 struct kvm_sregs *sregs)
1324 {
1325 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
1326 int i;
1327
1328 kvmppc_set_pvr_pr(vcpu, sregs->pvr);
1329
1330 vcpu3s->sdr1 = sregs->u.s.sdr1;
1331 if (vcpu->arch.hflags & BOOK3S_HFLAG_SLB) {
1332 for (i = 0; i < 64; i++) {
1333 vcpu->arch.mmu.slbmte(vcpu, sregs->u.s.ppc64.slb[i].slbv,
1334 sregs->u.s.ppc64.slb[i].slbe);
1335 }
1336 } else {
1337 for (i = 0; i < 16; i++) {
1338 vcpu->arch.mmu.mtsrin(vcpu, i, sregs->u.s.ppc32.sr[i]);
1339 }
1340 for (i = 0; i < 8; i++) {
1341 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), false,
1342 (u32)sregs->u.s.ppc32.ibat[i]);
1343 kvmppc_set_bat(vcpu, &(vcpu3s->ibat[i]), true,
1344 (u32)(sregs->u.s.ppc32.ibat[i] >> 32));
1345 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), false,
1346 (u32)sregs->u.s.ppc32.dbat[i]);
1347 kvmppc_set_bat(vcpu, &(vcpu3s->dbat[i]), true,
1348 (u32)(sregs->u.s.ppc32.dbat[i] >> 32));
1349 }
1350 }
1351
1352 /* Flush the MMU after messing with the segments */
1353 kvmppc_mmu_pte_flush(vcpu, 0, 0);
1354
1355 return 0;
1356 }
1357
kvmppc_get_one_reg_pr(struct kvm_vcpu * vcpu,u64 id,union kvmppc_one_reg * val)1358 static int kvmppc_get_one_reg_pr(struct kvm_vcpu *vcpu, u64 id,
1359 union kvmppc_one_reg *val)
1360 {
1361 int r = 0;
1362
1363 switch (id) {
1364 case KVM_REG_PPC_DEBUG_INST:
1365 *val = get_reg_val(id, KVMPPC_INST_SW_BREAKPOINT);
1366 break;
1367 case KVM_REG_PPC_HIOR:
1368 *val = get_reg_val(id, to_book3s(vcpu)->hior);
1369 break;
1370 case KVM_REG_PPC_VTB:
1371 *val = get_reg_val(id, to_book3s(vcpu)->vtb);
1372 break;
1373 case KVM_REG_PPC_LPCR:
1374 case KVM_REG_PPC_LPCR_64:
1375 /*
1376 * We are only interested in the LPCR_ILE bit
1377 */
1378 if (vcpu->arch.intr_msr & MSR_LE)
1379 *val = get_reg_val(id, LPCR_ILE);
1380 else
1381 *val = get_reg_val(id, 0);
1382 break;
1383 default:
1384 r = -EINVAL;
1385 break;
1386 }
1387
1388 return r;
1389 }
1390
kvmppc_set_lpcr_pr(struct kvm_vcpu * vcpu,u64 new_lpcr)1391 static void kvmppc_set_lpcr_pr(struct kvm_vcpu *vcpu, u64 new_lpcr)
1392 {
1393 if (new_lpcr & LPCR_ILE)
1394 vcpu->arch.intr_msr |= MSR_LE;
1395 else
1396 vcpu->arch.intr_msr &= ~MSR_LE;
1397 }
1398
kvmppc_set_one_reg_pr(struct kvm_vcpu * vcpu,u64 id,union kvmppc_one_reg * val)1399 static int kvmppc_set_one_reg_pr(struct kvm_vcpu *vcpu, u64 id,
1400 union kvmppc_one_reg *val)
1401 {
1402 int r = 0;
1403
1404 switch (id) {
1405 case KVM_REG_PPC_HIOR:
1406 to_book3s(vcpu)->hior = set_reg_val(id, *val);
1407 to_book3s(vcpu)->hior_explicit = true;
1408 break;
1409 case KVM_REG_PPC_VTB:
1410 to_book3s(vcpu)->vtb = set_reg_val(id, *val);
1411 break;
1412 case KVM_REG_PPC_LPCR:
1413 case KVM_REG_PPC_LPCR_64:
1414 kvmppc_set_lpcr_pr(vcpu, set_reg_val(id, *val));
1415 break;
1416 default:
1417 r = -EINVAL;
1418 break;
1419 }
1420
1421 return r;
1422 }
1423
kvmppc_core_vcpu_create_pr(struct kvm * kvm,unsigned int id)1424 static struct kvm_vcpu *kvmppc_core_vcpu_create_pr(struct kvm *kvm,
1425 unsigned int id)
1426 {
1427 struct kvmppc_vcpu_book3s *vcpu_book3s;
1428 struct kvm_vcpu *vcpu;
1429 int err = -ENOMEM;
1430 unsigned long p;
1431
1432 vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
1433 if (!vcpu)
1434 goto out;
1435
1436 vcpu_book3s = vzalloc(sizeof(struct kvmppc_vcpu_book3s));
1437 if (!vcpu_book3s)
1438 goto free_vcpu;
1439 vcpu->arch.book3s = vcpu_book3s;
1440
1441 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1442 vcpu->arch.shadow_vcpu =
1443 kzalloc(sizeof(*vcpu->arch.shadow_vcpu), GFP_KERNEL);
1444 if (!vcpu->arch.shadow_vcpu)
1445 goto free_vcpu3s;
1446 #endif
1447
1448 err = kvm_vcpu_init(vcpu, kvm, id);
1449 if (err)
1450 goto free_shadow_vcpu;
1451
1452 err = -ENOMEM;
1453 p = __get_free_page(GFP_KERNEL|__GFP_ZERO);
1454 if (!p)
1455 goto uninit_vcpu;
1456 vcpu->arch.shared = (void *)p;
1457 #ifdef CONFIG_PPC_BOOK3S_64
1458 /* Always start the shared struct in native endian mode */
1459 #ifdef __BIG_ENDIAN__
1460 vcpu->arch.shared_big_endian = true;
1461 #else
1462 vcpu->arch.shared_big_endian = false;
1463 #endif
1464
1465 /*
1466 * Default to the same as the host if we're on sufficiently
1467 * recent machine that we have 1TB segments;
1468 * otherwise default to PPC970FX.
1469 */
1470 vcpu->arch.pvr = 0x3C0301;
1471 if (mmu_has_feature(MMU_FTR_1T_SEGMENT))
1472 vcpu->arch.pvr = mfspr(SPRN_PVR);
1473 vcpu->arch.intr_msr = MSR_SF;
1474 #else
1475 /* default to book3s_32 (750) */
1476 vcpu->arch.pvr = 0x84202;
1477 #endif
1478 kvmppc_set_pvr_pr(vcpu, vcpu->arch.pvr);
1479 vcpu->arch.slb_nr = 64;
1480
1481 vcpu->arch.shadow_msr = MSR_USER64 & ~MSR_LE;
1482
1483 err = kvmppc_mmu_init(vcpu);
1484 if (err < 0)
1485 goto uninit_vcpu;
1486
1487 return vcpu;
1488
1489 uninit_vcpu:
1490 kvm_vcpu_uninit(vcpu);
1491 free_shadow_vcpu:
1492 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1493 kfree(vcpu->arch.shadow_vcpu);
1494 free_vcpu3s:
1495 #endif
1496 vfree(vcpu_book3s);
1497 free_vcpu:
1498 kmem_cache_free(kvm_vcpu_cache, vcpu);
1499 out:
1500 return ERR_PTR(err);
1501 }
1502
kvmppc_core_vcpu_free_pr(struct kvm_vcpu * vcpu)1503 static void kvmppc_core_vcpu_free_pr(struct kvm_vcpu *vcpu)
1504 {
1505 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
1506
1507 free_page((unsigned long)vcpu->arch.shared & PAGE_MASK);
1508 kvm_vcpu_uninit(vcpu);
1509 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
1510 kfree(vcpu->arch.shadow_vcpu);
1511 #endif
1512 vfree(vcpu_book3s);
1513 kmem_cache_free(kvm_vcpu_cache, vcpu);
1514 }
1515
kvmppc_vcpu_run_pr(struct kvm_run * kvm_run,struct kvm_vcpu * vcpu)1516 static int kvmppc_vcpu_run_pr(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
1517 {
1518 int ret;
1519 #ifdef CONFIG_ALTIVEC
1520 unsigned long uninitialized_var(vrsave);
1521 #endif
1522
1523 /* Check if we can run the vcpu at all */
1524 if (!vcpu->arch.sane) {
1525 kvm_run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
1526 ret = -EINVAL;
1527 goto out;
1528 }
1529
1530 kvmppc_setup_debug(vcpu);
1531
1532 /*
1533 * Interrupts could be timers for the guest which we have to inject
1534 * again, so let's postpone them until we're in the guest and if we
1535 * really did time things so badly, then we just exit again due to
1536 * a host external interrupt.
1537 */
1538 ret = kvmppc_prepare_to_enter(vcpu);
1539 if (ret <= 0)
1540 goto out;
1541 /* interrupts now hard-disabled */
1542
1543 /* Save FPU, Altivec and VSX state */
1544 giveup_all(current);
1545
1546 /* Preload FPU if it's enabled */
1547 if (kvmppc_get_msr(vcpu) & MSR_FP)
1548 kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
1549
1550 kvmppc_fix_ee_before_entry();
1551
1552 ret = __kvmppc_vcpu_run(kvm_run, vcpu);
1553
1554 kvmppc_clear_debug(vcpu);
1555
1556 /* No need for guest_exit. It's done in handle_exit.
1557 We also get here with interrupts enabled. */
1558
1559 /* Make sure we save the guest FPU/Altivec/VSX state */
1560 kvmppc_giveup_ext(vcpu, MSR_FP | MSR_VEC | MSR_VSX);
1561
1562 /* Make sure we save the guest TAR/EBB/DSCR state */
1563 kvmppc_giveup_fac(vcpu, FSCR_TAR_LG);
1564
1565 out:
1566 vcpu->mode = OUTSIDE_GUEST_MODE;
1567 return ret;
1568 }
1569
1570 /*
1571 * Get (and clear) the dirty memory log for a memory slot.
1572 */
kvm_vm_ioctl_get_dirty_log_pr(struct kvm * kvm,struct kvm_dirty_log * log)1573 static int kvm_vm_ioctl_get_dirty_log_pr(struct kvm *kvm,
1574 struct kvm_dirty_log *log)
1575 {
1576 struct kvm_memslots *slots;
1577 struct kvm_memory_slot *memslot;
1578 struct kvm_vcpu *vcpu;
1579 ulong ga, ga_end;
1580 int is_dirty = 0;
1581 int r;
1582 unsigned long n;
1583
1584 mutex_lock(&kvm->slots_lock);
1585
1586 r = kvm_get_dirty_log(kvm, log, &is_dirty);
1587 if (r)
1588 goto out;
1589
1590 /* If nothing is dirty, don't bother messing with page tables. */
1591 if (is_dirty) {
1592 slots = kvm_memslots(kvm);
1593 memslot = id_to_memslot(slots, log->slot);
1594
1595 ga = memslot->base_gfn << PAGE_SHIFT;
1596 ga_end = ga + (memslot->npages << PAGE_SHIFT);
1597
1598 kvm_for_each_vcpu(n, vcpu, kvm)
1599 kvmppc_mmu_pte_pflush(vcpu, ga, ga_end);
1600
1601 n = kvm_dirty_bitmap_bytes(memslot);
1602 memset(memslot->dirty_bitmap, 0, n);
1603 }
1604
1605 r = 0;
1606 out:
1607 mutex_unlock(&kvm->slots_lock);
1608 return r;
1609 }
1610
kvmppc_core_flush_memslot_pr(struct kvm * kvm,struct kvm_memory_slot * memslot)1611 static void kvmppc_core_flush_memslot_pr(struct kvm *kvm,
1612 struct kvm_memory_slot *memslot)
1613 {
1614 return;
1615 }
1616
kvmppc_core_prepare_memory_region_pr(struct kvm * kvm,struct kvm_memory_slot * memslot,const struct kvm_userspace_memory_region * mem)1617 static int kvmppc_core_prepare_memory_region_pr(struct kvm *kvm,
1618 struct kvm_memory_slot *memslot,
1619 const struct kvm_userspace_memory_region *mem)
1620 {
1621 return 0;
1622 }
1623
kvmppc_core_commit_memory_region_pr(struct kvm * kvm,const struct kvm_userspace_memory_region * mem,const struct kvm_memory_slot * old,const struct kvm_memory_slot * new)1624 static void kvmppc_core_commit_memory_region_pr(struct kvm *kvm,
1625 const struct kvm_userspace_memory_region *mem,
1626 const struct kvm_memory_slot *old,
1627 const struct kvm_memory_slot *new)
1628 {
1629 return;
1630 }
1631
kvmppc_core_free_memslot_pr(struct kvm_memory_slot * free,struct kvm_memory_slot * dont)1632 static void kvmppc_core_free_memslot_pr(struct kvm_memory_slot *free,
1633 struct kvm_memory_slot *dont)
1634 {
1635 return;
1636 }
1637
kvmppc_core_create_memslot_pr(struct kvm_memory_slot * slot,unsigned long npages)1638 static int kvmppc_core_create_memslot_pr(struct kvm_memory_slot *slot,
1639 unsigned long npages)
1640 {
1641 return 0;
1642 }
1643
1644
1645 #ifdef CONFIG_PPC64
kvm_vm_ioctl_get_smmu_info_pr(struct kvm * kvm,struct kvm_ppc_smmu_info * info)1646 static int kvm_vm_ioctl_get_smmu_info_pr(struct kvm *kvm,
1647 struct kvm_ppc_smmu_info *info)
1648 {
1649 long int i;
1650 struct kvm_vcpu *vcpu;
1651
1652 info->flags = 0;
1653
1654 /* SLB is always 64 entries */
1655 info->slb_size = 64;
1656
1657 /* Standard 4k base page size segment */
1658 info->sps[0].page_shift = 12;
1659 info->sps[0].slb_enc = 0;
1660 info->sps[0].enc[0].page_shift = 12;
1661 info->sps[0].enc[0].pte_enc = 0;
1662
1663 /*
1664 * 64k large page size.
1665 * We only want to put this in if the CPUs we're emulating
1666 * support it, but unfortunately we don't have a vcpu easily
1667 * to hand here to test. Just pick the first vcpu, and if
1668 * that doesn't exist yet, report the minimum capability,
1669 * i.e., no 64k pages.
1670 * 1T segment support goes along with 64k pages.
1671 */
1672 i = 1;
1673 vcpu = kvm_get_vcpu(kvm, 0);
1674 if (vcpu && (vcpu->arch.hflags & BOOK3S_HFLAG_MULTI_PGSIZE)) {
1675 info->flags = KVM_PPC_1T_SEGMENTS;
1676 info->sps[i].page_shift = 16;
1677 info->sps[i].slb_enc = SLB_VSID_L | SLB_VSID_LP_01;
1678 info->sps[i].enc[0].page_shift = 16;
1679 info->sps[i].enc[0].pte_enc = 1;
1680 ++i;
1681 }
1682
1683 /* Standard 16M large page size segment */
1684 info->sps[i].page_shift = 24;
1685 info->sps[i].slb_enc = SLB_VSID_L;
1686 info->sps[i].enc[0].page_shift = 24;
1687 info->sps[i].enc[0].pte_enc = 0;
1688
1689 return 0;
1690 }
1691 #else
kvm_vm_ioctl_get_smmu_info_pr(struct kvm * kvm,struct kvm_ppc_smmu_info * info)1692 static int kvm_vm_ioctl_get_smmu_info_pr(struct kvm *kvm,
1693 struct kvm_ppc_smmu_info *info)
1694 {
1695 /* We should not get called */
1696 BUG();
1697 }
1698 #endif /* CONFIG_PPC64 */
1699
1700 static unsigned int kvm_global_user_count = 0;
1701 static DEFINE_SPINLOCK(kvm_global_user_count_lock);
1702
kvmppc_core_init_vm_pr(struct kvm * kvm)1703 static int kvmppc_core_init_vm_pr(struct kvm *kvm)
1704 {
1705 mutex_init(&kvm->arch.hpt_mutex);
1706
1707 #ifdef CONFIG_PPC_BOOK3S_64
1708 /* Start out with the default set of hcalls enabled */
1709 kvmppc_pr_init_default_hcalls(kvm);
1710 #endif
1711
1712 if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
1713 spin_lock(&kvm_global_user_count_lock);
1714 if (++kvm_global_user_count == 1)
1715 pseries_disable_reloc_on_exc();
1716 spin_unlock(&kvm_global_user_count_lock);
1717 }
1718 return 0;
1719 }
1720
kvmppc_core_destroy_vm_pr(struct kvm * kvm)1721 static void kvmppc_core_destroy_vm_pr(struct kvm *kvm)
1722 {
1723 #ifdef CONFIG_PPC64
1724 WARN_ON(!list_empty(&kvm->arch.spapr_tce_tables));
1725 #endif
1726
1727 if (firmware_has_feature(FW_FEATURE_SET_MODE)) {
1728 spin_lock(&kvm_global_user_count_lock);
1729 BUG_ON(kvm_global_user_count == 0);
1730 if (--kvm_global_user_count == 0)
1731 pseries_enable_reloc_on_exc();
1732 spin_unlock(&kvm_global_user_count_lock);
1733 }
1734 }
1735
kvmppc_core_check_processor_compat_pr(void)1736 static int kvmppc_core_check_processor_compat_pr(void)
1737 {
1738 /*
1739 * Disable KVM for Power9 untill the required bits merged.
1740 */
1741 if (cpu_has_feature(CPU_FTR_ARCH_300))
1742 return -EIO;
1743 return 0;
1744 }
1745
kvm_arch_vm_ioctl_pr(struct file * filp,unsigned int ioctl,unsigned long arg)1746 static long kvm_arch_vm_ioctl_pr(struct file *filp,
1747 unsigned int ioctl, unsigned long arg)
1748 {
1749 return -ENOTTY;
1750 }
1751
1752 static struct kvmppc_ops kvm_ops_pr = {
1753 .get_sregs = kvm_arch_vcpu_ioctl_get_sregs_pr,
1754 .set_sregs = kvm_arch_vcpu_ioctl_set_sregs_pr,
1755 .get_one_reg = kvmppc_get_one_reg_pr,
1756 .set_one_reg = kvmppc_set_one_reg_pr,
1757 .vcpu_load = kvmppc_core_vcpu_load_pr,
1758 .vcpu_put = kvmppc_core_vcpu_put_pr,
1759 .set_msr = kvmppc_set_msr_pr,
1760 .vcpu_run = kvmppc_vcpu_run_pr,
1761 .vcpu_create = kvmppc_core_vcpu_create_pr,
1762 .vcpu_free = kvmppc_core_vcpu_free_pr,
1763 .check_requests = kvmppc_core_check_requests_pr,
1764 .get_dirty_log = kvm_vm_ioctl_get_dirty_log_pr,
1765 .flush_memslot = kvmppc_core_flush_memslot_pr,
1766 .prepare_memory_region = kvmppc_core_prepare_memory_region_pr,
1767 .commit_memory_region = kvmppc_core_commit_memory_region_pr,
1768 .unmap_hva = kvm_unmap_hva_pr,
1769 .unmap_hva_range = kvm_unmap_hva_range_pr,
1770 .age_hva = kvm_age_hva_pr,
1771 .test_age_hva = kvm_test_age_hva_pr,
1772 .set_spte_hva = kvm_set_spte_hva_pr,
1773 .mmu_destroy = kvmppc_mmu_destroy_pr,
1774 .free_memslot = kvmppc_core_free_memslot_pr,
1775 .create_memslot = kvmppc_core_create_memslot_pr,
1776 .init_vm = kvmppc_core_init_vm_pr,
1777 .destroy_vm = kvmppc_core_destroy_vm_pr,
1778 .get_smmu_info = kvm_vm_ioctl_get_smmu_info_pr,
1779 .emulate_op = kvmppc_core_emulate_op_pr,
1780 .emulate_mtspr = kvmppc_core_emulate_mtspr_pr,
1781 .emulate_mfspr = kvmppc_core_emulate_mfspr_pr,
1782 .fast_vcpu_kick = kvm_vcpu_kick,
1783 .arch_vm_ioctl = kvm_arch_vm_ioctl_pr,
1784 #ifdef CONFIG_PPC_BOOK3S_64
1785 .hcall_implemented = kvmppc_hcall_impl_pr,
1786 #endif
1787 };
1788
1789
kvmppc_book3s_init_pr(void)1790 int kvmppc_book3s_init_pr(void)
1791 {
1792 int r;
1793
1794 r = kvmppc_core_check_processor_compat_pr();
1795 if (r < 0)
1796 return r;
1797
1798 kvm_ops_pr.owner = THIS_MODULE;
1799 kvmppc_pr_ops = &kvm_ops_pr;
1800
1801 r = kvmppc_mmu_hpte_sysinit();
1802 return r;
1803 }
1804
kvmppc_book3s_exit_pr(void)1805 void kvmppc_book3s_exit_pr(void)
1806 {
1807 kvmppc_pr_ops = NULL;
1808 kvmppc_mmu_hpte_sysexit();
1809 }
1810
1811 /*
1812 * We only support separate modules for book3s 64
1813 */
1814 #ifdef CONFIG_PPC_BOOK3S_64
1815
1816 module_init(kvmppc_book3s_init_pr);
1817 module_exit(kvmppc_book3s_exit_pr);
1818
1819 MODULE_LICENSE("GPL");
1820 MODULE_ALIAS_MISCDEV(KVM_MINOR);
1821 MODULE_ALIAS("devname:kvm");
1822 #endif
1823