2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
6 * Copyright 2016 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
9 #include <linux/types.h>
10 #include <linux/string.h>
11 #include <linux/kvm.h>
12 #include <linux/kvm_host.h>
14 #include <asm/kvm_ppc.h>
15 #include <asm/kvm_book3s.h>
18 #include <asm/pgtable.h>
19 #include <asm/pgalloc.h>
20 #include <asm/pte-walk.h>
23 * Supported radix tree geometry.
24 * Like p9, we support either 5 or 9 bits at the first (lowest) level,
25 * for a page size of 64k or 4k.
27 static int p9_supported_radix_bits[4] = { 5, 9, 9, 13 };
29 int kvmppc_mmu_radix_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
30 struct kvmppc_pte *gpte, bool data, bool iswrite)
32 struct kvm *kvm = vcpu->kvm;
37 unsigned long root, pte, index;
38 unsigned long rts, bits, offset;
40 unsigned long proc_tbl_size;
42 /* Work out effective PID */
43 switch (eaddr >> 62) {
53 proc_tbl_size = 1 << ((kvm->arch.process_table & PRTS_MASK) + 12);
54 if (pid * 16 >= proc_tbl_size)
57 /* Read partition table to find root of tree for effective PID */
58 ptbl = (kvm->arch.process_table & PRTB_MASK) + (pid * 16);
59 ret = kvm_read_guest(kvm, ptbl, &prte, sizeof(prte));
63 root = be64_to_cpu(prte);
64 rts = ((root & RTS1_MASK) >> (RTS1_SHIFT - 3)) |
65 ((root & RTS2_MASK) >> RTS2_SHIFT);
66 bits = root & RPDS_MASK;
67 root = root & RPDB_MASK;
71 /* current implementations only support 52-bit space */
75 for (level = 3; level >= 0; --level) {
76 if (level && bits != p9_supported_radix_bits[level])
78 if (level == 0 && !(bits == 5 || bits == 9))
81 index = (eaddr >> offset) & ((1UL << bits) - 1);
82 /* check that low bits of page table base are zero */
83 if (root & ((1UL << (bits + 3)) - 1))
85 ret = kvm_read_guest(kvm, root + index * 8,
89 pte = __be64_to_cpu(rpte);
90 if (!(pte & _PAGE_PRESENT))
95 root = pte & 0x0fffffffffffff00ul;
97 /* need a leaf at lowest level; 512GB pages not supported */
98 if (level < 0 || level == 3)
101 /* offset is now log base 2 of the page size */
102 gpa = pte & 0x01fffffffffff000ul;
103 if (gpa & ((1ul << offset) - 1))
105 gpa += eaddr & ((1ul << offset) - 1);
106 for (ps = MMU_PAGE_4K; ps < MMU_PAGE_COUNT; ++ps)
107 if (offset == mmu_psize_defs[ps].shift)
109 gpte->page_size = ps;
114 /* Work out permissions */
115 gpte->may_read = !!(pte & _PAGE_READ);
116 gpte->may_write = !!(pte & _PAGE_WRITE);
117 gpte->may_execute = !!(pte & _PAGE_EXEC);
118 if (kvmppc_get_msr(vcpu) & MSR_PR) {
119 if (pte & _PAGE_PRIVILEGED) {
122 gpte->may_execute = 0;
125 if (!(pte & _PAGE_PRIVILEGED)) {
126 /* Check AMR/IAMR to see if strict mode is in force */
127 if (vcpu->arch.amr & (1ul << 62))
129 if (vcpu->arch.amr & (1ul << 63))
131 if (vcpu->arch.iamr & (1ul << 62))
132 gpte->may_execute = 0;
139 static void kvmppc_radix_tlbie_page(struct kvm *kvm, unsigned long addr,
142 unsigned long psize = PAGE_SIZE;
145 psize = 1UL << pshift;
147 addr &= ~(psize - 1);
148 radix__flush_tlb_lpid_page(kvm->arch.lpid, addr, psize);
151 static void kvmppc_radix_flush_pwc(struct kvm *kvm)
153 radix__flush_pwc_lpid(kvm->arch.lpid);
156 static unsigned long kvmppc_radix_update_pte(struct kvm *kvm, pte_t *ptep,
157 unsigned long clr, unsigned long set,
158 unsigned long addr, unsigned int shift)
160 return __radix_pte_update(ptep, clr, set);
163 void kvmppc_radix_set_pte_at(struct kvm *kvm, unsigned long addr,
164 pte_t *ptep, pte_t pte)
166 radix__set_pte_at(kvm->mm, addr, ptep, pte, 0);
169 static struct kmem_cache *kvm_pte_cache;
170 static struct kmem_cache *kvm_pmd_cache;
172 static pte_t *kvmppc_pte_alloc(void)
176 pte = kmem_cache_alloc(kvm_pte_cache, GFP_KERNEL);
177 /* pmd_populate() will only reference _pa(pte). */
178 kmemleak_ignore(pte);
183 static void kvmppc_pte_free(pte_t *ptep)
185 kmem_cache_free(kvm_pte_cache, ptep);
188 /* Like pmd_huge() and pmd_large(), but works regardless of config options */
189 static inline int pmd_is_leaf(pmd_t pmd)
191 return !!(pmd_val(pmd) & _PAGE_PTE);
194 static pmd_t *kvmppc_pmd_alloc(void)
198 pmd = kmem_cache_alloc(kvm_pmd_cache, GFP_KERNEL);
199 /* pud_populate() will only reference _pa(pmd). */
200 kmemleak_ignore(pmd);
205 static void kvmppc_pmd_free(pmd_t *pmdp)
207 kmem_cache_free(kvm_pmd_cache, pmdp);
210 static void kvmppc_unmap_pte(struct kvm *kvm, pte_t *pte,
211 unsigned long gpa, unsigned int shift)
214 unsigned long page_size = 1ul << shift;
217 old = kvmppc_radix_update_pte(kvm, pte, ~0UL, 0, gpa, shift);
218 kvmppc_radix_tlbie_page(kvm, gpa, shift);
219 if (old & _PAGE_DIRTY) {
220 unsigned long gfn = gpa >> PAGE_SHIFT;
221 struct kvm_memory_slot *memslot;
223 memslot = gfn_to_memslot(kvm, gfn);
224 if (memslot && memslot->dirty_bitmap)
225 kvmppc_update_dirty_map(memslot, gfn, page_size);
230 * kvmppc_free_p?d are used to free existing page tables, and recursively
231 * descend and clear and free children.
232 * Callers are responsible for flushing the PWC.
234 * When page tables are being unmapped/freed as part of page fault path
235 * (full == false), ptes are not expected. There is code to unmap them
236 * and emit a warning if encountered, but there may already be data
237 * corruption due to the unexpected mappings.
239 static void kvmppc_unmap_free_pte(struct kvm *kvm, pte_t *pte, bool full)
242 memset(pte, 0, sizeof(long) << PTE_INDEX_SIZE);
247 for (it = 0; it < PTRS_PER_PTE; ++it, ++p) {
248 if (pte_val(*p) == 0)
251 kvmppc_unmap_pte(kvm, p,
252 pte_pfn(*p) << PAGE_SHIFT,
257 kvmppc_pte_free(pte);
260 static void kvmppc_unmap_free_pmd(struct kvm *kvm, pmd_t *pmd, bool full)
265 for (im = 0; im < PTRS_PER_PMD; ++im, ++p) {
266 if (!pmd_present(*p))
268 if (pmd_is_leaf(*p)) {
273 kvmppc_unmap_pte(kvm, (pte_t *)p,
274 pte_pfn(*(pte_t *)p) << PAGE_SHIFT,
280 pte = pte_offset_map(p, 0);
281 kvmppc_unmap_free_pte(kvm, pte, full);
285 kvmppc_pmd_free(pmd);
288 static void kvmppc_unmap_free_pud(struct kvm *kvm, pud_t *pud)
293 for (iu = 0; iu < PTRS_PER_PUD; ++iu, ++p) {
294 if (!pud_present(*p))
301 pmd = pmd_offset(p, 0);
302 kvmppc_unmap_free_pmd(kvm, pmd, true);
306 pud_free(kvm->mm, pud);
309 void kvmppc_free_radix(struct kvm *kvm)
314 if (!kvm->arch.pgtable)
316 pgd = kvm->arch.pgtable;
317 for (ig = 0; ig < PTRS_PER_PGD; ++ig, ++pgd) {
320 if (!pgd_present(*pgd))
322 pud = pud_offset(pgd, 0);
323 kvmppc_unmap_free_pud(kvm, pud);
326 pgd_free(kvm->mm, kvm->arch.pgtable);
327 kvm->arch.pgtable = NULL;
330 static void kvmppc_unmap_free_pmd_entry_table(struct kvm *kvm, pmd_t *pmd,
333 pte_t *pte = pte_offset_kernel(pmd, 0);
336 * Clearing the pmd entry then flushing the PWC ensures that the pte
337 * page no longer be cached by the MMU, so can be freed without
338 * flushing the PWC again.
341 kvmppc_radix_flush_pwc(kvm);
343 kvmppc_unmap_free_pte(kvm, pte, false);
346 static void kvmppc_unmap_free_pud_entry_table(struct kvm *kvm, pud_t *pud,
349 pmd_t *pmd = pmd_offset(pud, 0);
352 * Clearing the pud entry then flushing the PWC ensures that the pmd
353 * page and any children pte pages will no longer be cached by the MMU,
354 * so can be freed without flushing the PWC again.
357 kvmppc_radix_flush_pwc(kvm);
359 kvmppc_unmap_free_pmd(kvm, pmd, false);
363 * There are a number of bits which may differ between different faults to
364 * the same partition scope entry. RC bits, in the course of cleaning and
365 * aging. And the write bit can change, either the access could have been
366 * upgraded, or a read fault could happen concurrently with a write fault
367 * that sets those bits first.
369 #define PTE_BITS_MUST_MATCH (~(_PAGE_WRITE | _PAGE_DIRTY | _PAGE_ACCESSED))
371 static int kvmppc_create_pte(struct kvm *kvm, pte_t pte, unsigned long gpa,
372 unsigned int level, unsigned long mmu_seq)
375 pud_t *pud, *new_pud = NULL;
376 pmd_t *pmd, *new_pmd = NULL;
377 pte_t *ptep, *new_ptep = NULL;
380 /* Traverse the guest's 2nd-level tree, allocate new levels needed */
381 pgd = kvm->arch.pgtable + pgd_index(gpa);
383 if (pgd_present(*pgd))
384 pud = pud_offset(pgd, gpa);
386 new_pud = pud_alloc_one(kvm->mm, gpa);
389 if (pud && pud_present(*pud) && !pud_huge(*pud))
390 pmd = pmd_offset(pud, gpa);
392 new_pmd = kvmppc_pmd_alloc();
394 if (level == 0 && !(pmd && pmd_present(*pmd) && !pmd_is_leaf(*pmd)))
395 new_ptep = kvmppc_pte_alloc();
397 /* Check if we might have been invalidated; let the guest retry if so */
398 spin_lock(&kvm->mmu_lock);
400 if (mmu_notifier_retry(kvm, mmu_seq))
403 /* Now traverse again under the lock and change the tree */
405 if (pgd_none(*pgd)) {
408 pgd_populate(kvm->mm, pgd, new_pud);
411 pud = pud_offset(pgd, gpa);
412 if (pud_huge(*pud)) {
413 unsigned long hgpa = gpa & PUD_MASK;
415 /* Check if we raced and someone else has set the same thing */
417 if (pud_raw(*pud) == pte_raw(pte)) {
421 /* Valid 1GB page here already, add our extra bits */
422 WARN_ON_ONCE((pud_val(*pud) ^ pte_val(pte)) &
423 PTE_BITS_MUST_MATCH);
424 kvmppc_radix_update_pte(kvm, (pte_t *)pud,
425 0, pte_val(pte), hgpa, PUD_SHIFT);
430 * If we raced with another CPU which has just put
431 * a 1GB pte in after we saw a pmd page, try again.
437 /* Valid 1GB page here already, remove it */
438 kvmppc_unmap_pte(kvm, (pte_t *)pud, hgpa, PUD_SHIFT);
441 if (!pud_none(*pud)) {
443 * There's a page table page here, but we wanted to
444 * install a large page, so remove and free the page
447 kvmppc_unmap_free_pud_entry_table(kvm, pud, gpa);
449 kvmppc_radix_set_pte_at(kvm, gpa, (pte_t *)pud, pte);
453 if (pud_none(*pud)) {
456 pud_populate(kvm->mm, pud, new_pmd);
459 pmd = pmd_offset(pud, gpa);
460 if (pmd_is_leaf(*pmd)) {
461 unsigned long lgpa = gpa & PMD_MASK;
463 /* Check if we raced and someone else has set the same thing */
465 if (pmd_raw(*pmd) == pte_raw(pte)) {
469 /* Valid 2MB page here already, add our extra bits */
470 WARN_ON_ONCE((pmd_val(*pmd) ^ pte_val(pte)) &
471 PTE_BITS_MUST_MATCH);
472 kvmppc_radix_update_pte(kvm, pmdp_ptep(pmd),
473 0, pte_val(pte), lgpa, PMD_SHIFT);
479 * If we raced with another CPU which has just put
480 * a 2MB pte in after we saw a pte page, try again.
486 /* Valid 2MB page here already, remove it */
487 kvmppc_unmap_pte(kvm, pmdp_ptep(pmd), lgpa, PMD_SHIFT);
490 if (!pmd_none(*pmd)) {
492 * There's a page table page here, but we wanted to
493 * install a large page, so remove and free the page
496 kvmppc_unmap_free_pmd_entry_table(kvm, pmd, gpa);
498 kvmppc_radix_set_pte_at(kvm, gpa, pmdp_ptep(pmd), pte);
502 if (pmd_none(*pmd)) {
505 pmd_populate(kvm->mm, pmd, new_ptep);
508 ptep = pte_offset_kernel(pmd, gpa);
509 if (pte_present(*ptep)) {
510 /* Check if someone else set the same thing */
511 if (pte_raw(*ptep) == pte_raw(pte)) {
515 /* Valid page here already, add our extra bits */
516 WARN_ON_ONCE((pte_val(*ptep) ^ pte_val(pte)) &
517 PTE_BITS_MUST_MATCH);
518 kvmppc_radix_update_pte(kvm, ptep, 0, pte_val(pte), gpa, 0);
522 kvmppc_radix_set_pte_at(kvm, gpa, ptep, pte);
526 spin_unlock(&kvm->mmu_lock);
528 pud_free(kvm->mm, new_pud);
530 kvmppc_pmd_free(new_pmd);
532 kvmppc_pte_free(new_ptep);
536 int kvmppc_book3s_radix_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu,
537 unsigned long ea, unsigned long dsisr)
539 struct kvm *kvm = vcpu->kvm;
540 unsigned long mmu_seq;
541 unsigned long gpa, gfn, hva;
542 struct kvm_memory_slot *memslot;
543 struct page *page = NULL;
546 bool upgrade_write = false;
547 bool *upgrade_p = &upgrade_write;
549 unsigned long pgflags;
550 unsigned int shift, level;
552 /* Check for unusual errors */
553 if (dsisr & DSISR_UNSUPP_MMU) {
554 pr_err("KVM: Got unsupported MMU fault\n");
557 if (dsisr & DSISR_BADACCESS) {
558 /* Reflect to the guest as DSI */
559 pr_err("KVM: Got radix HV page fault with DSISR=%lx\n", dsisr);
560 kvmppc_core_queue_data_storage(vcpu, ea, dsisr);
564 /* Translate the logical address and get the page */
565 gpa = vcpu->arch.fault_gpa & ~0xfffUL;
566 gpa &= ~0xF000000000000000ul;
567 gfn = gpa >> PAGE_SHIFT;
568 if (!(dsisr & DSISR_PRTABLE_FAULT))
570 memslot = gfn_to_memslot(kvm, gfn);
572 /* No memslot means it's an emulated MMIO region */
573 if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) {
574 if (dsisr & (DSISR_PRTABLE_FAULT | DSISR_BADACCESS |
577 * Bad address in guest page table tree, or other
578 * unusual error - reflect it to the guest as DSI.
580 kvmppc_core_queue_data_storage(vcpu, ea, dsisr);
583 return kvmppc_hv_emulate_mmio(run, vcpu, gpa, ea,
584 dsisr & DSISR_ISSTORE);
587 writing = (dsisr & DSISR_ISSTORE) != 0;
588 if (memslot->flags & KVM_MEM_READONLY) {
590 /* give the guest a DSI */
591 dsisr = DSISR_ISSTORE | DSISR_PROTFAULT;
592 kvmppc_core_queue_data_storage(vcpu, ea, dsisr);
598 if (dsisr & DSISR_SET_RC) {
600 * Need to set an R or C bit in the 2nd-level tables;
601 * since we are just helping out the hardware here,
602 * it is sufficient to do what the hardware does.
604 pgflags = _PAGE_ACCESSED;
606 pgflags |= _PAGE_DIRTY;
608 * We are walking the secondary page table here. We can do this
609 * without disabling irq.
611 spin_lock(&kvm->mmu_lock);
612 ptep = __find_linux_pte(kvm->arch.pgtable,
614 if (ptep && pte_present(*ptep) &&
615 (!writing || pte_write(*ptep))) {
616 kvmppc_radix_update_pte(kvm, ptep, 0, pgflags,
618 dsisr &= ~DSISR_SET_RC;
620 spin_unlock(&kvm->mmu_lock);
621 if (!(dsisr & (DSISR_BAD_FAULT_64S | DSISR_NOHPTE |
622 DSISR_PROTFAULT | DSISR_SET_RC)))
626 /* used to check for invalidations in progress */
627 mmu_seq = kvm->mmu_notifier_seq;
631 * Do a fast check first, since __gfn_to_pfn_memslot doesn't
632 * do it with !atomic && !async, which is how we call it.
633 * We always ask for write permission since the common case
634 * is that the page is writable.
636 hva = gfn_to_hva_memslot(memslot, gfn);
637 if (upgrade_p && __get_user_pages_fast(hva, 1, 1, &page) == 1) {
638 upgrade_write = true;
642 /* Call KVM generic code to do the slow-path check */
643 pfn = __gfn_to_pfn_memslot(memslot, gfn, false, NULL,
645 if (is_error_noslot_pfn(pfn))
648 if (pfn_valid(pfn)) {
649 page = pfn_to_page(pfn);
650 if (PageReserved(page))
656 * Read the PTE from the process' radix tree and use that
657 * so we get the shift and attribute bits.
660 ptep = __find_linux_pte(vcpu->arch.pgdir, hva, NULL, &shift);
662 * If the PTE disappeared temporarily due to a THP
663 * collapse, just return and let the guest try again.
674 /* Get pte level from shift/size */
675 if (shift == PUD_SHIFT &&
676 (gpa & (PUD_SIZE - PAGE_SIZE)) ==
677 (hva & (PUD_SIZE - PAGE_SIZE))) {
679 } else if (shift == PMD_SHIFT &&
680 (gpa & (PMD_SIZE - PAGE_SIZE)) ==
681 (hva & (PMD_SIZE - PAGE_SIZE))) {
685 if (shift > PAGE_SHIFT) {
687 * If the pte maps more than one page, bring over
688 * bits from the virtual address to get the real
689 * address of the specific single page we want.
691 unsigned long rpnmask = (1ul << shift) - PAGE_SIZE;
692 pte = __pte(pte_val(pte) | (hva & rpnmask));
696 pte = __pte(pte_val(pte) | _PAGE_EXEC | _PAGE_ACCESSED);
697 if (writing || upgrade_write) {
698 if (pte_val(pte) & _PAGE_WRITE)
699 pte = __pte(pte_val(pte) | _PAGE_DIRTY);
701 pte = __pte(pte_val(pte) & ~(_PAGE_WRITE | _PAGE_DIRTY));
704 /* Allocate space in the tree and write the PTE */
705 ret = kvmppc_create_pte(kvm, pte, gpa, level, mmu_seq);
708 if (!ret && (pte_val(pte) & _PAGE_WRITE))
709 set_page_dirty_lock(page);
713 if (ret == 0 || ret == -EAGAIN)
718 /* Called with kvm->lock held */
719 int kvm_unmap_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
723 unsigned long gpa = gfn << PAGE_SHIFT;
727 ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift);
728 if (ptep && pte_present(*ptep)) {
729 old = kvmppc_radix_update_pte(kvm, ptep, ~0UL, 0,
731 kvmppc_radix_tlbie_page(kvm, gpa, shift);
732 if ((old & _PAGE_DIRTY) && memslot->dirty_bitmap) {
733 unsigned long psize = PAGE_SIZE;
735 psize = 1ul << shift;
736 kvmppc_update_dirty_map(memslot, gfn, psize);
742 /* Called with kvm->lock held */
743 int kvm_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
747 unsigned long gpa = gfn << PAGE_SHIFT;
751 ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift);
752 if (ptep && pte_present(*ptep) && pte_young(*ptep)) {
753 kvmppc_radix_update_pte(kvm, ptep, _PAGE_ACCESSED, 0,
755 /* XXX need to flush tlb here? */
761 /* Called with kvm->lock held */
762 int kvm_test_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
766 unsigned long gpa = gfn << PAGE_SHIFT;
770 ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift);
771 if (ptep && pte_present(*ptep) && pte_young(*ptep))
776 /* Returns the number of PAGE_SIZE pages that are dirty */
777 static int kvm_radix_test_clear_dirty(struct kvm *kvm,
778 struct kvm_memory_slot *memslot, int pagenum)
780 unsigned long gfn = memslot->base_gfn + pagenum;
781 unsigned long gpa = gfn << PAGE_SHIFT;
786 ptep = __find_linux_pte(kvm->arch.pgtable, gpa, NULL, &shift);
787 if (ptep && pte_present(*ptep) && pte_dirty(*ptep)) {
790 ret = 1 << (shift - PAGE_SHIFT);
791 kvmppc_radix_update_pte(kvm, ptep, _PAGE_DIRTY, 0,
793 kvmppc_radix_tlbie_page(kvm, gpa, shift);
798 long kvmppc_hv_get_dirty_log_radix(struct kvm *kvm,
799 struct kvm_memory_slot *memslot, unsigned long *map)
804 for (i = 0; i < memslot->npages; i = j) {
805 npages = kvm_radix_test_clear_dirty(kvm, memslot, i);
808 * Note that if npages > 0 then i must be a multiple of npages,
809 * since huge pages are only used to back the guest at guest
810 * real addresses that are a multiple of their size.
811 * Since we have at most one PTE covering any given guest
812 * real address, if npages > 1 we can skip to i + npages.
816 set_dirty_bits(map, i, npages);
823 static void add_rmmu_ap_encoding(struct kvm_ppc_rmmu_info *info,
824 int psize, int *indexp)
826 if (!mmu_psize_defs[psize].shift)
828 info->ap_encodings[*indexp] = mmu_psize_defs[psize].shift |
829 (mmu_psize_defs[psize].ap << 29);
833 int kvmhv_get_rmmu_info(struct kvm *kvm, struct kvm_ppc_rmmu_info *info)
837 if (!radix_enabled())
839 memset(info, 0, sizeof(*info));
842 info->geometries[0].page_shift = 12;
843 info->geometries[0].level_bits[0] = 9;
844 for (i = 1; i < 4; ++i)
845 info->geometries[0].level_bits[i] = p9_supported_radix_bits[i];
847 info->geometries[1].page_shift = 16;
848 for (i = 0; i < 4; ++i)
849 info->geometries[1].level_bits[i] = p9_supported_radix_bits[i];
852 add_rmmu_ap_encoding(info, MMU_PAGE_4K, &i);
853 add_rmmu_ap_encoding(info, MMU_PAGE_64K, &i);
854 add_rmmu_ap_encoding(info, MMU_PAGE_2M, &i);
855 add_rmmu_ap_encoding(info, MMU_PAGE_1G, &i);
860 int kvmppc_init_vm_radix(struct kvm *kvm)
862 kvm->arch.pgtable = pgd_alloc(kvm->mm);
863 if (!kvm->arch.pgtable)
868 static void pte_ctor(void *addr)
870 memset(addr, 0, RADIX_PTE_TABLE_SIZE);
873 static void pmd_ctor(void *addr)
875 memset(addr, 0, RADIX_PMD_TABLE_SIZE);
878 int kvmppc_radix_init(void)
880 unsigned long size = sizeof(void *) << RADIX_PTE_INDEX_SIZE;
882 kvm_pte_cache = kmem_cache_create("kvm-pte", size, size, 0, pte_ctor);
886 size = sizeof(void *) << RADIX_PMD_INDEX_SIZE;
888 kvm_pmd_cache = kmem_cache_create("kvm-pmd", size, size, 0, pmd_ctor);
889 if (!kvm_pmd_cache) {
890 kmem_cache_destroy(kvm_pte_cache);
897 void kvmppc_radix_exit(void)
899 kmem_cache_destroy(kvm_pte_cache);
900 kmem_cache_destroy(kvm_pmd_cache);