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Linux/arch/powerpc/kvm/book3s_64_mmu.c

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  1 // SPDX-License-Identifier: GPL-2.0-only
  2 /*
  3  *
  4  * Copyright SUSE Linux Products GmbH 2009
  5  *
  6  * Authors: Alexander Graf <agraf@suse.de>
  7  */
  8 
  9 #include <linux/types.h>
 10 #include <linux/string.h>
 11 #include <linux/kvm.h>
 12 #include <linux/kvm_host.h>
 13 #include <linux/highmem.h>
 14 
 15 #include <asm/kvm_ppc.h>
 16 #include <asm/kvm_book3s.h>
 17 #include <asm/book3s/64/mmu-hash.h>
 18 
 19 /* #define DEBUG_MMU */
 20 
 21 #ifdef DEBUG_MMU
 22 #define dprintk(X...) printk(KERN_INFO X)
 23 #else
 24 #define dprintk(X...) do { } while(0)
 25 #endif
 26 
 27 static struct kvmppc_slb *kvmppc_mmu_book3s_64_find_slbe(
 28                                 struct kvm_vcpu *vcpu,
 29                                 gva_t eaddr)
 30 {
 31         int i;
 32         u64 esid = GET_ESID(eaddr);
 33         u64 esid_1t = GET_ESID_1T(eaddr);
 34 
 35         for (i = 0; i < vcpu->arch.slb_nr; i++) {
 36                 u64 cmp_esid = esid;
 37 
 38                 if (!vcpu->arch.slb[i].valid)
 39                         continue;
 40 
 41                 if (vcpu->arch.slb[i].tb)
 42                         cmp_esid = esid_1t;
 43 
 44                 if (vcpu->arch.slb[i].esid == cmp_esid)
 45                         return &vcpu->arch.slb[i];
 46         }
 47 
 48         dprintk("KVM: No SLB entry found for 0x%lx [%llx | %llx]\n",
 49                 eaddr, esid, esid_1t);
 50         for (i = 0; i < vcpu->arch.slb_nr; i++) {
 51             if (vcpu->arch.slb[i].vsid)
 52                 dprintk("  %d: %c%c%c %llx %llx\n", i,
 53                         vcpu->arch.slb[i].valid ? 'v' : ' ',
 54                         vcpu->arch.slb[i].large ? 'l' : ' ',
 55                         vcpu->arch.slb[i].tb    ? 't' : ' ',
 56                         vcpu->arch.slb[i].esid,
 57                         vcpu->arch.slb[i].vsid);
 58         }
 59 
 60         return NULL;
 61 }
 62 
 63 static int kvmppc_slb_sid_shift(struct kvmppc_slb *slbe)
 64 {
 65         return slbe->tb ? SID_SHIFT_1T : SID_SHIFT;
 66 }
 67 
 68 static u64 kvmppc_slb_offset_mask(struct kvmppc_slb *slbe)
 69 {
 70         return (1ul << kvmppc_slb_sid_shift(slbe)) - 1;
 71 }
 72 
 73 static u64 kvmppc_slb_calc_vpn(struct kvmppc_slb *slb, gva_t eaddr)
 74 {
 75         eaddr &= kvmppc_slb_offset_mask(slb);
 76 
 77         return (eaddr >> VPN_SHIFT) |
 78                 ((slb->vsid) << (kvmppc_slb_sid_shift(slb) - VPN_SHIFT));
 79 }
 80 
 81 static u64 kvmppc_mmu_book3s_64_ea_to_vp(struct kvm_vcpu *vcpu, gva_t eaddr,
 82                                          bool data)
 83 {
 84         struct kvmppc_slb *slb;
 85 
 86         slb = kvmppc_mmu_book3s_64_find_slbe(vcpu, eaddr);
 87         if (!slb)
 88                 return 0;
 89 
 90         return kvmppc_slb_calc_vpn(slb, eaddr);
 91 }
 92 
 93 static int mmu_pagesize(int mmu_pg)
 94 {
 95         switch (mmu_pg) {
 96         case MMU_PAGE_64K:
 97                 return 16;
 98         case MMU_PAGE_16M:
 99                 return 24;
100         }
101         return 12;
102 }
103 
104 static int kvmppc_mmu_book3s_64_get_pagesize(struct kvmppc_slb *slbe)
105 {
106         return mmu_pagesize(slbe->base_page_size);
107 }
108 
109 static u32 kvmppc_mmu_book3s_64_get_page(struct kvmppc_slb *slbe, gva_t eaddr)
110 {
111         int p = kvmppc_mmu_book3s_64_get_pagesize(slbe);
112 
113         return ((eaddr & kvmppc_slb_offset_mask(slbe)) >> p);
114 }
115 
116 static hva_t kvmppc_mmu_book3s_64_get_pteg(struct kvm_vcpu *vcpu,
117                                 struct kvmppc_slb *slbe, gva_t eaddr,
118                                 bool second)
119 {
120         struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
121         u64 hash, pteg, htabsize;
122         u32 ssize;
123         hva_t r;
124         u64 vpn;
125 
126         htabsize = ((1 << ((vcpu_book3s->sdr1 & 0x1f) + 11)) - 1);
127 
128         vpn = kvmppc_slb_calc_vpn(slbe, eaddr);
129         ssize = slbe->tb ? MMU_SEGSIZE_1T : MMU_SEGSIZE_256M;
130         hash = hpt_hash(vpn, kvmppc_mmu_book3s_64_get_pagesize(slbe), ssize);
131         if (second)
132                 hash = ~hash;
133         hash &= ((1ULL << 39ULL) - 1ULL);
134         hash &= htabsize;
135         hash <<= 7ULL;
136 
137         pteg = vcpu_book3s->sdr1 & 0xfffffffffffc0000ULL;
138         pteg |= hash;
139 
140         dprintk("MMU: page=0x%x sdr1=0x%llx pteg=0x%llx vsid=0x%llx\n",
141                 page, vcpu_book3s->sdr1, pteg, slbe->vsid);
142 
143         /* When running a PAPR guest, SDR1 contains a HVA address instead
144            of a GPA */
145         if (vcpu->arch.papr_enabled)
146                 r = pteg;
147         else
148                 r = gfn_to_hva(vcpu->kvm, pteg >> PAGE_SHIFT);
149 
150         if (kvm_is_error_hva(r))
151                 return r;
152         return r | (pteg & ~PAGE_MASK);
153 }
154 
155 static u64 kvmppc_mmu_book3s_64_get_avpn(struct kvmppc_slb *slbe, gva_t eaddr)
156 {
157         int p = kvmppc_mmu_book3s_64_get_pagesize(slbe);
158         u64 avpn;
159 
160         avpn = kvmppc_mmu_book3s_64_get_page(slbe, eaddr);
161         avpn |= slbe->vsid << (kvmppc_slb_sid_shift(slbe) - p);
162 
163         if (p < 16)
164                 avpn >>= ((80 - p) - 56) - 8;   /* 16 - p */
165         else
166                 avpn <<= p - 16;
167 
168         return avpn;
169 }
170 
171 /*
172  * Return page size encoded in the second word of a HPTE, or
173  * -1 for an invalid encoding for the base page size indicated by
174  * the SLB entry.  This doesn't handle mixed pagesize segments yet.
175  */
176 static int decode_pagesize(struct kvmppc_slb *slbe, u64 r)
177 {
178         switch (slbe->base_page_size) {
179         case MMU_PAGE_64K:
180                 if ((r & 0xf000) == 0x1000)
181                         return MMU_PAGE_64K;
182                 break;
183         case MMU_PAGE_16M:
184                 if ((r & 0xff000) == 0)
185                         return MMU_PAGE_16M;
186                 break;
187         }
188         return -1;
189 }
190 
191 static int kvmppc_mmu_book3s_64_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
192                                       struct kvmppc_pte *gpte, bool data,
193                                       bool iswrite)
194 {
195         struct kvmppc_slb *slbe;
196         hva_t ptegp;
197         u64 pteg[16];
198         u64 avpn = 0;
199         u64 r;
200         u64 v_val, v_mask;
201         u64 eaddr_mask;
202         int i;
203         u8 pp, key = 0;
204         bool found = false;
205         bool second = false;
206         int pgsize;
207         ulong mp_ea = vcpu->arch.magic_page_ea;
208 
209         /* Magic page override */
210         if (unlikely(mp_ea) &&
211             unlikely((eaddr & ~0xfffULL) == (mp_ea & ~0xfffULL)) &&
212             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
213                 gpte->eaddr = eaddr;
214                 gpte->vpage = kvmppc_mmu_book3s_64_ea_to_vp(vcpu, eaddr, data);
215                 gpte->raddr = vcpu->arch.magic_page_pa | (gpte->raddr & 0xfff);
216                 gpte->raddr &= KVM_PAM;
217                 gpte->may_execute = true;
218                 gpte->may_read = true;
219                 gpte->may_write = true;
220                 gpte->page_size = MMU_PAGE_4K;
221                 gpte->wimg = HPTE_R_M;
222 
223                 return 0;
224         }
225 
226         slbe = kvmppc_mmu_book3s_64_find_slbe(vcpu, eaddr);
227         if (!slbe)
228                 goto no_seg_found;
229 
230         avpn = kvmppc_mmu_book3s_64_get_avpn(slbe, eaddr);
231         v_val = avpn & HPTE_V_AVPN;
232 
233         if (slbe->tb)
234                 v_val |= SLB_VSID_B_1T;
235         if (slbe->large)
236                 v_val |= HPTE_V_LARGE;
237         v_val |= HPTE_V_VALID;
238 
239         v_mask = SLB_VSID_B | HPTE_V_AVPN | HPTE_V_LARGE | HPTE_V_VALID |
240                 HPTE_V_SECONDARY;
241 
242         pgsize = slbe->large ? MMU_PAGE_16M : MMU_PAGE_4K;
243 
244         mutex_lock(&vcpu->kvm->arch.hpt_mutex);
245 
246 do_second:
247         ptegp = kvmppc_mmu_book3s_64_get_pteg(vcpu, slbe, eaddr, second);
248         if (kvm_is_error_hva(ptegp))
249                 goto no_page_found;
250 
251         if(copy_from_user(pteg, (void __user *)ptegp, sizeof(pteg))) {
252                 printk_ratelimited(KERN_ERR
253                         "KVM: Can't copy data from 0x%lx!\n", ptegp);
254                 goto no_page_found;
255         }
256 
257         if ((kvmppc_get_msr(vcpu) & MSR_PR) && slbe->Kp)
258                 key = 4;
259         else if (!(kvmppc_get_msr(vcpu) & MSR_PR) && slbe->Ks)
260                 key = 4;
261 
262         for (i=0; i<16; i+=2) {
263                 u64 pte0 = be64_to_cpu(pteg[i]);
264                 u64 pte1 = be64_to_cpu(pteg[i + 1]);
265 
266                 /* Check all relevant fields of 1st dword */
267                 if ((pte0 & v_mask) == v_val) {
268                         /* If large page bit is set, check pgsize encoding */
269                         if (slbe->large &&
270                             (vcpu->arch.hflags & BOOK3S_HFLAG_MULTI_PGSIZE)) {
271                                 pgsize = decode_pagesize(slbe, pte1);
272                                 if (pgsize < 0)
273                                         continue;
274                         }
275                         found = true;
276                         break;
277                 }
278         }
279 
280         if (!found) {
281                 if (second)
282                         goto no_page_found;
283                 v_val |= HPTE_V_SECONDARY;
284                 second = true;
285                 goto do_second;
286         }
287 
288         r = be64_to_cpu(pteg[i+1]);
289         pp = (r & HPTE_R_PP) | key;
290         if (r & HPTE_R_PP0)
291                 pp |= 8;
292 
293         gpte->eaddr = eaddr;
294         gpte->vpage = kvmppc_mmu_book3s_64_ea_to_vp(vcpu, eaddr, data);
295 
296         eaddr_mask = (1ull << mmu_pagesize(pgsize)) - 1;
297         gpte->raddr = (r & HPTE_R_RPN & ~eaddr_mask) | (eaddr & eaddr_mask);
298         gpte->page_size = pgsize;
299         gpte->may_execute = ((r & HPTE_R_N) ? false : true);
300         if (unlikely(vcpu->arch.disable_kernel_nx) &&
301             !(kvmppc_get_msr(vcpu) & MSR_PR))
302                 gpte->may_execute = true;
303         gpte->may_read = false;
304         gpte->may_write = false;
305         gpte->wimg = r & HPTE_R_WIMG;
306 
307         switch (pp) {
308         case 0:
309         case 1:
310         case 2:
311         case 6:
312                 gpte->may_write = true;
313                 fallthrough;
314         case 3:
315         case 5:
316         case 7:
317         case 10:
318                 gpte->may_read = true;
319                 break;
320         }
321 
322         dprintk("KVM MMU: Translated 0x%lx [0x%llx] -> 0x%llx "
323                 "-> 0x%lx\n",
324                 eaddr, avpn, gpte->vpage, gpte->raddr);
325 
326         /* Update PTE R and C bits, so the guest's swapper knows we used the
327          * page */
328         if (gpte->may_read && !(r & HPTE_R_R)) {
329                 /*
330                  * Set the accessed flag.
331                  * We have to write this back with a single byte write
332                  * because another vcpu may be accessing this on
333                  * non-PAPR platforms such as mac99, and this is
334                  * what real hardware does.
335                  */
336                 char __user *addr = (char __user *) (ptegp + (i + 1) * sizeof(u64));
337                 r |= HPTE_R_R;
338                 put_user(r >> 8, addr + 6);
339         }
340         if (iswrite && gpte->may_write && !(r & HPTE_R_C)) {
341                 /* Set the dirty flag */
342                 /* Use a single byte write */
343                 char __user *addr = (char __user *) (ptegp + (i + 1) * sizeof(u64));
344                 r |= HPTE_R_C;
345                 put_user(r, addr + 7);
346         }
347 
348         mutex_unlock(&vcpu->kvm->arch.hpt_mutex);
349 
350         if (!gpte->may_read || (iswrite && !gpte->may_write))
351                 return -EPERM;
352         return 0;
353 
354 no_page_found:
355         mutex_unlock(&vcpu->kvm->arch.hpt_mutex);
356         return -ENOENT;
357 
358 no_seg_found:
359         dprintk("KVM MMU: Trigger segment fault\n");
360         return -EINVAL;
361 }
362 
363 static void kvmppc_mmu_book3s_64_slbmte(struct kvm_vcpu *vcpu, u64 rs, u64 rb)
364 {
365         u64 esid, esid_1t;
366         int slb_nr;
367         struct kvmppc_slb *slbe;
368 
369         dprintk("KVM MMU: slbmte(0x%llx, 0x%llx)\n", rs, rb);
370 
371         esid = GET_ESID(rb);
372         esid_1t = GET_ESID_1T(rb);
373         slb_nr = rb & 0xfff;
374 
375         if (slb_nr > vcpu->arch.slb_nr)
376                 return;
377 
378         slbe = &vcpu->arch.slb[slb_nr];
379 
380         slbe->large = (rs & SLB_VSID_L) ? 1 : 0;
381         slbe->tb    = (rs & SLB_VSID_B_1T) ? 1 : 0;
382         slbe->esid  = slbe->tb ? esid_1t : esid;
383         slbe->vsid  = (rs & ~SLB_VSID_B) >> (kvmppc_slb_sid_shift(slbe) - 16);
384         slbe->valid = (rb & SLB_ESID_V) ? 1 : 0;
385         slbe->Ks    = (rs & SLB_VSID_KS) ? 1 : 0;
386         slbe->Kp    = (rs & SLB_VSID_KP) ? 1 : 0;
387         slbe->nx    = (rs & SLB_VSID_N) ? 1 : 0;
388         slbe->class = (rs & SLB_VSID_C) ? 1 : 0;
389 
390         slbe->base_page_size = MMU_PAGE_4K;
391         if (slbe->large) {
392                 if (vcpu->arch.hflags & BOOK3S_HFLAG_MULTI_PGSIZE) {
393                         switch (rs & SLB_VSID_LP) {
394                         case SLB_VSID_LP_00:
395                                 slbe->base_page_size = MMU_PAGE_16M;
396                                 break;
397                         case SLB_VSID_LP_01:
398                                 slbe->base_page_size = MMU_PAGE_64K;
399                                 break;
400                         }
401                 } else
402                         slbe->base_page_size = MMU_PAGE_16M;
403         }
404 
405         slbe->orige = rb & (ESID_MASK | SLB_ESID_V);
406         slbe->origv = rs;
407 
408         /* Map the new segment */
409         kvmppc_mmu_map_segment(vcpu, esid << SID_SHIFT);
410 }
411 
412 static int kvmppc_mmu_book3s_64_slbfee(struct kvm_vcpu *vcpu, gva_t eaddr,
413                                        ulong *ret_slb)
414 {
415         struct kvmppc_slb *slbe = kvmppc_mmu_book3s_64_find_slbe(vcpu, eaddr);
416 
417         if (slbe) {
418                 *ret_slb = slbe->origv;
419                 return 0;
420         }
421         *ret_slb = 0;
422         return -ENOENT;
423 }
424 
425 static u64 kvmppc_mmu_book3s_64_slbmfee(struct kvm_vcpu *vcpu, u64 slb_nr)
426 {
427         struct kvmppc_slb *slbe;
428 
429         if (slb_nr > vcpu->arch.slb_nr)
430                 return 0;
431 
432         slbe = &vcpu->arch.slb[slb_nr];
433 
434         return slbe->orige;
435 }
436 
437 static u64 kvmppc_mmu_book3s_64_slbmfev(struct kvm_vcpu *vcpu, u64 slb_nr)
438 {
439         struct kvmppc_slb *slbe;
440 
441         if (slb_nr > vcpu->arch.slb_nr)
442                 return 0;
443 
444         slbe = &vcpu->arch.slb[slb_nr];
445 
446         return slbe->origv;
447 }
448 
449 static void kvmppc_mmu_book3s_64_slbie(struct kvm_vcpu *vcpu, u64 ea)
450 {
451         struct kvmppc_slb *slbe;
452         u64 seg_size;
453 
454         dprintk("KVM MMU: slbie(0x%llx)\n", ea);
455 
456         slbe = kvmppc_mmu_book3s_64_find_slbe(vcpu, ea);
457 
458         if (!slbe)
459                 return;
460 
461         dprintk("KVM MMU: slbie(0x%llx, 0x%llx)\n", ea, slbe->esid);
462 
463         slbe->valid = false;
464         slbe->orige = 0;
465         slbe->origv = 0;
466 
467         seg_size = 1ull << kvmppc_slb_sid_shift(slbe);
468         kvmppc_mmu_flush_segment(vcpu, ea & ~(seg_size - 1), seg_size);
469 }
470 
471 static void kvmppc_mmu_book3s_64_slbia(struct kvm_vcpu *vcpu)
472 {
473         int i;
474 
475         dprintk("KVM MMU: slbia()\n");
476 
477         for (i = 1; i < vcpu->arch.slb_nr; i++) {
478                 vcpu->arch.slb[i].valid = false;
479                 vcpu->arch.slb[i].orige = 0;
480                 vcpu->arch.slb[i].origv = 0;
481         }
482 
483         if (kvmppc_get_msr(vcpu) & MSR_IR) {
484                 kvmppc_mmu_flush_segments(vcpu);
485                 kvmppc_mmu_map_segment(vcpu, kvmppc_get_pc(vcpu));
486         }
487 }
488 
489 static void kvmppc_mmu_book3s_64_mtsrin(struct kvm_vcpu *vcpu, u32 srnum,
490                                         ulong value)
491 {
492         u64 rb = 0, rs = 0;
493 
494         /*
495          * According to Book3 2.01 mtsrin is implemented as:
496          *
497          * The SLB entry specified by (RB)32:35 is loaded from register
498          * RS, as follows.
499          *
500          * SLBE Bit     Source                  SLB Field
501          *
502          * 0:31         0x0000_0000             ESID-0:31
503          * 32:35        (RB)32:35               ESID-32:35
504          * 36           0b1                     V
505          * 37:61        0x00_0000|| 0b0         VSID-0:24
506          * 62:88        (RS)37:63               VSID-25:51
507          * 89:91        (RS)33:35               Ks Kp N
508          * 92           (RS)36                  L ((RS)36 must be 0b0)
509          * 93           0b0                     C
510          */
511 
512         dprintk("KVM MMU: mtsrin(0x%x, 0x%lx)\n", srnum, value);
513 
514         /* ESID = srnum */
515         rb |= (srnum & 0xf) << 28;
516         /* Set the valid bit */
517         rb |= 1 << 27;
518         /* Index = ESID */
519         rb |= srnum;
520 
521         /* VSID = VSID */
522         rs |= (value & 0xfffffff) << 12;
523         /* flags = flags */
524         rs |= ((value >> 28) & 0x7) << 9;
525 
526         kvmppc_mmu_book3s_64_slbmte(vcpu, rs, rb);
527 }
528 
529 static void kvmppc_mmu_book3s_64_tlbie(struct kvm_vcpu *vcpu, ulong va,
530                                        bool large)
531 {
532         u64 mask = 0xFFFFFFFFFULL;
533         unsigned long i;
534         struct kvm_vcpu *v;
535 
536         dprintk("KVM MMU: tlbie(0x%lx)\n", va);
537 
538         /*
539          * The tlbie instruction changed behaviour starting with
540          * POWER6.  POWER6 and later don't have the large page flag
541          * in the instruction but in the RB value, along with bits
542          * indicating page and segment sizes.
543          */
544         if (vcpu->arch.hflags & BOOK3S_HFLAG_NEW_TLBIE) {
545                 /* POWER6 or later */
546                 if (va & 1) {           /* L bit */
547                         if ((va & 0xf000) == 0x1000)
548                                 mask = 0xFFFFFFFF0ULL;  /* 64k page */
549                         else
550                                 mask = 0xFFFFFF000ULL;  /* 16M page */
551                 }
552         } else {
553                 /* older processors, e.g. PPC970 */
554                 if (large)
555                         mask = 0xFFFFFF000ULL;
556         }
557         /* flush this VA on all vcpus */
558         kvm_for_each_vcpu(i, v, vcpu->kvm)
559                 kvmppc_mmu_pte_vflush(v, va >> 12, mask);
560 }
561 
562 #ifdef CONFIG_PPC_64K_PAGES
563 static int segment_contains_magic_page(struct kvm_vcpu *vcpu, ulong esid)
564 {
565         ulong mp_ea = vcpu->arch.magic_page_ea;
566 
567         return mp_ea && !(kvmppc_get_msr(vcpu) & MSR_PR) &&
568                 (mp_ea >> SID_SHIFT) == esid;
569 }
570 #endif
571 
572 static int kvmppc_mmu_book3s_64_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid,
573                                              u64 *vsid)
574 {
575         ulong ea = esid << SID_SHIFT;
576         struct kvmppc_slb *slb;
577         u64 gvsid = esid;
578         ulong mp_ea = vcpu->arch.magic_page_ea;
579         int pagesize = MMU_PAGE_64K;
580         u64 msr = kvmppc_get_msr(vcpu);
581 
582         if (msr & (MSR_DR|MSR_IR)) {
583                 slb = kvmppc_mmu_book3s_64_find_slbe(vcpu, ea);
584                 if (slb) {
585                         gvsid = slb->vsid;
586                         pagesize = slb->base_page_size;
587                         if (slb->tb) {
588                                 gvsid <<= SID_SHIFT_1T - SID_SHIFT;
589                                 gvsid |= esid & ((1ul << (SID_SHIFT_1T - SID_SHIFT)) - 1);
590                                 gvsid |= VSID_1T;
591                         }
592                 }
593         }
594 
595         switch (msr & (MSR_DR|MSR_IR)) {
596         case 0:
597                 gvsid = VSID_REAL | esid;
598                 break;
599         case MSR_IR:
600                 gvsid |= VSID_REAL_IR;
601                 break;
602         case MSR_DR:
603                 gvsid |= VSID_REAL_DR;
604                 break;
605         case MSR_DR|MSR_IR:
606                 if (!slb)
607                         goto no_slb;
608 
609                 break;
610         default:
611                 BUG();
612                 break;
613         }
614 
615 #ifdef CONFIG_PPC_64K_PAGES
616         /*
617          * Mark this as a 64k segment if the host is using
618          * 64k pages, the host MMU supports 64k pages and
619          * the guest segment page size is >= 64k,
620          * but not if this segment contains the magic page.
621          */
622         if (pagesize >= MMU_PAGE_64K &&
623             mmu_psize_defs[MMU_PAGE_64K].shift &&
624             !segment_contains_magic_page(vcpu, esid))
625                 gvsid |= VSID_64K;
626 #endif
627 
628         if (kvmppc_get_msr(vcpu) & MSR_PR)
629                 gvsid |= VSID_PR;
630 
631         *vsid = gvsid;
632         return 0;
633 
634 no_slb:
635         /* Catch magic page case */
636         if (unlikely(mp_ea) &&
637             unlikely(esid == (mp_ea >> SID_SHIFT)) &&
638             !(kvmppc_get_msr(vcpu) & MSR_PR)) {
639                 *vsid = VSID_REAL | esid;
640                 return 0;
641         }
642 
643         return -EINVAL;
644 }
645 
646 static bool kvmppc_mmu_book3s_64_is_dcbz32(struct kvm_vcpu *vcpu)
647 {
648         return (to_book3s(vcpu)->hid[5] & 0x80);
649 }
650 
651 void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu)
652 {
653         struct kvmppc_mmu *mmu = &vcpu->arch.mmu;
654 
655         mmu->mfsrin = NULL;
656         mmu->mtsrin = kvmppc_mmu_book3s_64_mtsrin;
657         mmu->slbmte = kvmppc_mmu_book3s_64_slbmte;
658         mmu->slbmfee = kvmppc_mmu_book3s_64_slbmfee;
659         mmu->slbmfev = kvmppc_mmu_book3s_64_slbmfev;
660         mmu->slbfee = kvmppc_mmu_book3s_64_slbfee;
661         mmu->slbie = kvmppc_mmu_book3s_64_slbie;
662         mmu->slbia = kvmppc_mmu_book3s_64_slbia;
663         mmu->xlate = kvmppc_mmu_book3s_64_xlate;
664         mmu->tlbie = kvmppc_mmu_book3s_64_tlbie;
665         mmu->esid_to_vsid = kvmppc_mmu_book3s_64_esid_to_vsid;
666         mmu->ea_to_vp = kvmppc_mmu_book3s_64_ea_to_vp;
667         mmu->is_dcbz32 = kvmppc_mmu_book3s_64_is_dcbz32;
668 
669         vcpu->arch.hflags |= BOOK3S_HFLAG_SLB;
670 }
671 

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