]>
Commit | Line | Data |
---|---|---|
de56a948 PM |
1 | /* |
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. | |
5 | * | |
6 | * This program is distributed in the hope that it will be useful, | |
7 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
8 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
9 | * GNU General Public License for more details. | |
10 | * | |
11 | * You should have received a copy of the GNU General Public License | |
12 | * along with this program; if not, write to the Free Software | |
13 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
14 | * | |
15 | * Copyright 2010 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com> | |
16 | */ | |
17 | ||
18 | #include <linux/types.h> | |
19 | #include <linux/string.h> | |
20 | #include <linux/kvm.h> | |
21 | #include <linux/kvm_host.h> | |
22 | #include <linux/highmem.h> | |
23 | #include <linux/gfp.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/hugetlb.h> | |
8936dda4 | 26 | #include <linux/vmalloc.h> |
de56a948 PM |
27 | |
28 | #include <asm/tlbflush.h> | |
29 | #include <asm/kvm_ppc.h> | |
30 | #include <asm/kvm_book3s.h> | |
31 | #include <asm/mmu-hash64.h> | |
32 | #include <asm/hvcall.h> | |
33 | #include <asm/synch.h> | |
34 | #include <asm/ppc-opcode.h> | |
35 | #include <asm/cputable.h> | |
36 | ||
9e368f29 PM |
37 | /* POWER7 has 10-bit LPIDs, PPC970 has 6-bit LPIDs */ |
38 | #define MAX_LPID_970 63 | |
de56a948 PM |
39 | #define NR_LPIDS (LPID_RSVD + 1) |
40 | unsigned long lpid_inuse[BITS_TO_LONGS(NR_LPIDS)]; | |
41 | ||
42 | long kvmppc_alloc_hpt(struct kvm *kvm) | |
43 | { | |
44 | unsigned long hpt; | |
45 | unsigned long lpid; | |
8936dda4 | 46 | struct revmap_entry *rev; |
d2a1b483 | 47 | struct kvmppc_linear_info *li; |
de56a948 | 48 | |
8936dda4 | 49 | /* Allocate guest's hashed page table */ |
d2a1b483 AG |
50 | li = kvm_alloc_hpt(); |
51 | if (li) { | |
52 | /* using preallocated memory */ | |
53 | hpt = (ulong)li->base_virt; | |
54 | kvm->arch.hpt_li = li; | |
55 | } else { | |
56 | /* using dynamic memory */ | |
57 | hpt = __get_free_pages(GFP_KERNEL|__GFP_ZERO|__GFP_REPEAT| | |
58 | __GFP_NOWARN, HPT_ORDER - PAGE_SHIFT); | |
59 | } | |
60 | ||
de56a948 PM |
61 | if (!hpt) { |
62 | pr_err("kvm_alloc_hpt: Couldn't alloc HPT\n"); | |
63 | return -ENOMEM; | |
64 | } | |
65 | kvm->arch.hpt_virt = hpt; | |
66 | ||
8936dda4 PM |
67 | /* Allocate reverse map array */ |
68 | rev = vmalloc(sizeof(struct revmap_entry) * HPT_NPTE); | |
69 | if (!rev) { | |
70 | pr_err("kvmppc_alloc_hpt: Couldn't alloc reverse map array\n"); | |
71 | goto out_freehpt; | |
72 | } | |
73 | kvm->arch.revmap = rev; | |
74 | ||
75 | /* Allocate the guest's logical partition ID */ | |
de56a948 PM |
76 | do { |
77 | lpid = find_first_zero_bit(lpid_inuse, NR_LPIDS); | |
78 | if (lpid >= NR_LPIDS) { | |
79 | pr_err("kvm_alloc_hpt: No LPIDs free\n"); | |
8936dda4 | 80 | goto out_freeboth; |
de56a948 PM |
81 | } |
82 | } while (test_and_set_bit(lpid, lpid_inuse)); | |
83 | ||
84 | kvm->arch.sdr1 = __pa(hpt) | (HPT_ORDER - 18); | |
85 | kvm->arch.lpid = lpid; | |
de56a948 PM |
86 | |
87 | pr_info("KVM guest htab at %lx, LPID %lx\n", hpt, lpid); | |
88 | return 0; | |
8936dda4 PM |
89 | |
90 | out_freeboth: | |
91 | vfree(rev); | |
92 | out_freehpt: | |
93 | free_pages(hpt, HPT_ORDER - PAGE_SHIFT); | |
94 | return -ENOMEM; | |
de56a948 PM |
95 | } |
96 | ||
97 | void kvmppc_free_hpt(struct kvm *kvm) | |
98 | { | |
de56a948 | 99 | clear_bit(kvm->arch.lpid, lpid_inuse); |
8936dda4 | 100 | vfree(kvm->arch.revmap); |
d2a1b483 AG |
101 | if (kvm->arch.hpt_li) |
102 | kvm_release_hpt(kvm->arch.hpt_li); | |
103 | else | |
104 | free_pages(kvm->arch.hpt_virt, HPT_ORDER - PAGE_SHIFT); | |
de56a948 PM |
105 | } |
106 | ||
da9d1d7f PM |
107 | /* Bits in first HPTE dword for pagesize 4k, 64k or 16M */ |
108 | static inline unsigned long hpte0_pgsize_encoding(unsigned long pgsize) | |
109 | { | |
110 | return (pgsize > 0x1000) ? HPTE_V_LARGE : 0; | |
111 | } | |
112 | ||
113 | /* Bits in second HPTE dword for pagesize 4k, 64k or 16M */ | |
114 | static inline unsigned long hpte1_pgsize_encoding(unsigned long pgsize) | |
115 | { | |
116 | return (pgsize == 0x10000) ? 0x1000 : 0; | |
117 | } | |
118 | ||
119 | void kvmppc_map_vrma(struct kvm_vcpu *vcpu, struct kvm_memory_slot *memslot, | |
120 | unsigned long porder) | |
de56a948 PM |
121 | { |
122 | unsigned long i; | |
b2b2f165 | 123 | unsigned long npages; |
c77162de PM |
124 | unsigned long hp_v, hp_r; |
125 | unsigned long addr, hash; | |
da9d1d7f PM |
126 | unsigned long psize; |
127 | unsigned long hp0, hp1; | |
c77162de | 128 | long ret; |
de56a948 | 129 | |
da9d1d7f PM |
130 | psize = 1ul << porder; |
131 | npages = memslot->npages >> (porder - PAGE_SHIFT); | |
de56a948 PM |
132 | |
133 | /* VRMA can't be > 1TB */ | |
8936dda4 PM |
134 | if (npages > 1ul << (40 - porder)) |
135 | npages = 1ul << (40 - porder); | |
de56a948 PM |
136 | /* Can't use more than 1 HPTE per HPTEG */ |
137 | if (npages > HPT_NPTEG) | |
138 | npages = HPT_NPTEG; | |
139 | ||
da9d1d7f PM |
140 | hp0 = HPTE_V_1TB_SEG | (VRMA_VSID << (40 - 16)) | |
141 | HPTE_V_BOLTED | hpte0_pgsize_encoding(psize); | |
142 | hp1 = hpte1_pgsize_encoding(psize) | | |
143 | HPTE_R_R | HPTE_R_C | HPTE_R_M | PP_RWXX; | |
144 | ||
de56a948 | 145 | for (i = 0; i < npages; ++i) { |
c77162de | 146 | addr = i << porder; |
de56a948 PM |
147 | /* can't use hpt_hash since va > 64 bits */ |
148 | hash = (i ^ (VRMA_VSID ^ (VRMA_VSID << 25))) & HPT_HASH_MASK; | |
149 | /* | |
150 | * We assume that the hash table is empty and no | |
151 | * vcpus are using it at this stage. Since we create | |
152 | * at most one HPTE per HPTEG, we just assume entry 7 | |
153 | * is available and use it. | |
154 | */ | |
8936dda4 | 155 | hash = (hash << 3) + 7; |
da9d1d7f PM |
156 | hp_v = hp0 | ((addr >> 16) & ~0x7fUL); |
157 | hp_r = hp1 | addr; | |
c77162de PM |
158 | ret = kvmppc_virtmode_h_enter(vcpu, H_EXACT, hash, hp_v, hp_r); |
159 | if (ret != H_SUCCESS) { | |
160 | pr_err("KVM: map_vrma at %lx failed, ret=%ld\n", | |
161 | addr, ret); | |
162 | break; | |
163 | } | |
de56a948 PM |
164 | } |
165 | } | |
166 | ||
167 | int kvmppc_mmu_hv_init(void) | |
168 | { | |
9e368f29 PM |
169 | unsigned long host_lpid, rsvd_lpid; |
170 | ||
171 | if (!cpu_has_feature(CPU_FTR_HVMODE)) | |
de56a948 | 172 | return -EINVAL; |
9e368f29 | 173 | |
de56a948 | 174 | memset(lpid_inuse, 0, sizeof(lpid_inuse)); |
9e368f29 PM |
175 | |
176 | if (cpu_has_feature(CPU_FTR_ARCH_206)) { | |
177 | host_lpid = mfspr(SPRN_LPID); /* POWER7 */ | |
178 | rsvd_lpid = LPID_RSVD; | |
179 | } else { | |
180 | host_lpid = 0; /* PPC970 */ | |
181 | rsvd_lpid = MAX_LPID_970; | |
182 | } | |
183 | ||
184 | set_bit(host_lpid, lpid_inuse); | |
185 | /* rsvd_lpid is reserved for use in partition switching */ | |
186 | set_bit(rsvd_lpid, lpid_inuse); | |
de56a948 PM |
187 | |
188 | return 0; | |
189 | } | |
190 | ||
191 | void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu) | |
192 | { | |
193 | } | |
194 | ||
195 | static void kvmppc_mmu_book3s_64_hv_reset_msr(struct kvm_vcpu *vcpu) | |
196 | { | |
197 | kvmppc_set_msr(vcpu, MSR_SF | MSR_ME); | |
198 | } | |
199 | ||
c77162de PM |
200 | /* |
201 | * This is called to get a reference to a guest page if there isn't | |
202 | * one already in the kvm->arch.slot_phys[][] arrays. | |
203 | */ | |
204 | static long kvmppc_get_guest_page(struct kvm *kvm, unsigned long gfn, | |
da9d1d7f PM |
205 | struct kvm_memory_slot *memslot, |
206 | unsigned long psize) | |
c77162de PM |
207 | { |
208 | unsigned long start; | |
da9d1d7f PM |
209 | long np, err; |
210 | struct page *page, *hpage, *pages[1]; | |
211 | unsigned long s, pgsize; | |
c77162de | 212 | unsigned long *physp; |
9d0ef5ea PM |
213 | unsigned int is_io, got, pgorder; |
214 | struct vm_area_struct *vma; | |
da9d1d7f | 215 | unsigned long pfn, i, npages; |
c77162de PM |
216 | |
217 | physp = kvm->arch.slot_phys[memslot->id]; | |
218 | if (!physp) | |
219 | return -EINVAL; | |
da9d1d7f | 220 | if (physp[gfn - memslot->base_gfn]) |
c77162de PM |
221 | return 0; |
222 | ||
9d0ef5ea PM |
223 | is_io = 0; |
224 | got = 0; | |
c77162de | 225 | page = NULL; |
da9d1d7f | 226 | pgsize = psize; |
9d0ef5ea | 227 | err = -EINVAL; |
c77162de PM |
228 | start = gfn_to_hva_memslot(memslot, gfn); |
229 | ||
230 | /* Instantiate and get the page we want access to */ | |
231 | np = get_user_pages_fast(start, 1, 1, pages); | |
9d0ef5ea PM |
232 | if (np != 1) { |
233 | /* Look up the vma for the page */ | |
234 | down_read(¤t->mm->mmap_sem); | |
235 | vma = find_vma(current->mm, start); | |
236 | if (!vma || vma->vm_start > start || | |
237 | start + psize > vma->vm_end || | |
238 | !(vma->vm_flags & VM_PFNMAP)) | |
239 | goto up_err; | |
240 | is_io = hpte_cache_bits(pgprot_val(vma->vm_page_prot)); | |
241 | pfn = vma->vm_pgoff + ((start - vma->vm_start) >> PAGE_SHIFT); | |
242 | /* check alignment of pfn vs. requested page size */ | |
243 | if (psize > PAGE_SIZE && (pfn & ((psize >> PAGE_SHIFT) - 1))) | |
244 | goto up_err; | |
245 | up_read(¤t->mm->mmap_sem); | |
246 | ||
247 | } else { | |
248 | page = pages[0]; | |
249 | got = KVMPPC_GOT_PAGE; | |
250 | ||
251 | /* See if this is a large page */ | |
252 | s = PAGE_SIZE; | |
253 | if (PageHuge(page)) { | |
254 | hpage = compound_head(page); | |
255 | s <<= compound_order(hpage); | |
256 | /* Get the whole large page if slot alignment is ok */ | |
257 | if (s > psize && slot_is_aligned(memslot, s) && | |
258 | !(memslot->userspace_addr & (s - 1))) { | |
259 | start &= ~(s - 1); | |
260 | pgsize = s; | |
261 | page = hpage; | |
262 | } | |
da9d1d7f | 263 | } |
9d0ef5ea PM |
264 | if (s < psize) |
265 | goto out; | |
266 | pfn = page_to_pfn(page); | |
c77162de | 267 | } |
c77162de | 268 | |
da9d1d7f PM |
269 | npages = pgsize >> PAGE_SHIFT; |
270 | pgorder = __ilog2(npages); | |
271 | physp += (gfn - memslot->base_gfn) & ~(npages - 1); | |
c77162de | 272 | spin_lock(&kvm->arch.slot_phys_lock); |
da9d1d7f PM |
273 | for (i = 0; i < npages; ++i) { |
274 | if (!physp[i]) { | |
9d0ef5ea PM |
275 | physp[i] = ((pfn + i) << PAGE_SHIFT) + |
276 | got + is_io + pgorder; | |
da9d1d7f PM |
277 | got = 0; |
278 | } | |
279 | } | |
c77162de | 280 | spin_unlock(&kvm->arch.slot_phys_lock); |
da9d1d7f | 281 | err = 0; |
c77162de | 282 | |
da9d1d7f PM |
283 | out: |
284 | if (got) { | |
285 | if (PageHuge(page)) | |
286 | page = compound_head(page); | |
287 | put_page(page); | |
288 | } | |
289 | return err; | |
9d0ef5ea PM |
290 | |
291 | up_err: | |
292 | up_read(¤t->mm->mmap_sem); | |
293 | return err; | |
c77162de PM |
294 | } |
295 | ||
296 | /* | |
342d3db7 PM |
297 | * We come here on a H_ENTER call from the guest when we are not |
298 | * using mmu notifiers and we don't have the requested page pinned | |
299 | * already. | |
c77162de PM |
300 | */ |
301 | long kvmppc_virtmode_h_enter(struct kvm_vcpu *vcpu, unsigned long flags, | |
302 | long pte_index, unsigned long pteh, unsigned long ptel) | |
303 | { | |
304 | struct kvm *kvm = vcpu->kvm; | |
305 | unsigned long psize, gpa, gfn; | |
306 | struct kvm_memory_slot *memslot; | |
307 | long ret; | |
308 | ||
342d3db7 PM |
309 | if (kvm->arch.using_mmu_notifiers) |
310 | goto do_insert; | |
311 | ||
c77162de PM |
312 | psize = hpte_page_size(pteh, ptel); |
313 | if (!psize) | |
314 | return H_PARAMETER; | |
315 | ||
697d3899 PM |
316 | pteh &= ~(HPTE_V_HVLOCK | HPTE_V_ABSENT | HPTE_V_VALID); |
317 | ||
c77162de PM |
318 | /* Find the memslot (if any) for this address */ |
319 | gpa = (ptel & HPTE_R_RPN) & ~(psize - 1); | |
320 | gfn = gpa >> PAGE_SHIFT; | |
321 | memslot = gfn_to_memslot(kvm, gfn); | |
697d3899 PM |
322 | if (memslot && !(memslot->flags & KVM_MEMSLOT_INVALID)) { |
323 | if (!slot_is_aligned(memslot, psize)) | |
324 | return H_PARAMETER; | |
325 | if (kvmppc_get_guest_page(kvm, gfn, memslot, psize) < 0) | |
326 | return H_PARAMETER; | |
327 | } | |
c77162de | 328 | |
342d3db7 PM |
329 | do_insert: |
330 | /* Protect linux PTE lookup from page table destruction */ | |
331 | rcu_read_lock_sched(); /* this disables preemption too */ | |
332 | vcpu->arch.pgdir = current->mm->pgd; | |
c77162de | 333 | ret = kvmppc_h_enter(vcpu, flags, pte_index, pteh, ptel); |
342d3db7 | 334 | rcu_read_unlock_sched(); |
c77162de PM |
335 | if (ret == H_TOO_HARD) { |
336 | /* this can't happen */ | |
337 | pr_err("KVM: Oops, kvmppc_h_enter returned too hard!\n"); | |
338 | ret = H_RESOURCE; /* or something */ | |
339 | } | |
340 | return ret; | |
341 | ||
342 | } | |
343 | ||
697d3899 PM |
344 | static struct kvmppc_slb *kvmppc_mmu_book3s_hv_find_slbe(struct kvm_vcpu *vcpu, |
345 | gva_t eaddr) | |
346 | { | |
347 | u64 mask; | |
348 | int i; | |
349 | ||
350 | for (i = 0; i < vcpu->arch.slb_nr; i++) { | |
351 | if (!(vcpu->arch.slb[i].orige & SLB_ESID_V)) | |
352 | continue; | |
353 | ||
354 | if (vcpu->arch.slb[i].origv & SLB_VSID_B_1T) | |
355 | mask = ESID_MASK_1T; | |
356 | else | |
357 | mask = ESID_MASK; | |
358 | ||
359 | if (((vcpu->arch.slb[i].orige ^ eaddr) & mask) == 0) | |
360 | return &vcpu->arch.slb[i]; | |
361 | } | |
362 | return NULL; | |
363 | } | |
364 | ||
365 | static unsigned long kvmppc_mmu_get_real_addr(unsigned long v, unsigned long r, | |
366 | unsigned long ea) | |
367 | { | |
368 | unsigned long ra_mask; | |
369 | ||
370 | ra_mask = hpte_page_size(v, r) - 1; | |
371 | return (r & HPTE_R_RPN & ~ra_mask) | (ea & ra_mask); | |
372 | } | |
373 | ||
de56a948 | 374 | static int kvmppc_mmu_book3s_64_hv_xlate(struct kvm_vcpu *vcpu, gva_t eaddr, |
697d3899 | 375 | struct kvmppc_pte *gpte, bool data) |
de56a948 | 376 | { |
697d3899 PM |
377 | struct kvm *kvm = vcpu->kvm; |
378 | struct kvmppc_slb *slbe; | |
379 | unsigned long slb_v; | |
380 | unsigned long pp, key; | |
381 | unsigned long v, gr; | |
382 | unsigned long *hptep; | |
383 | int index; | |
384 | int virtmode = vcpu->arch.shregs.msr & (data ? MSR_DR : MSR_IR); | |
385 | ||
386 | /* Get SLB entry */ | |
387 | if (virtmode) { | |
388 | slbe = kvmppc_mmu_book3s_hv_find_slbe(vcpu, eaddr); | |
389 | if (!slbe) | |
390 | return -EINVAL; | |
391 | slb_v = slbe->origv; | |
392 | } else { | |
393 | /* real mode access */ | |
394 | slb_v = vcpu->kvm->arch.vrma_slb_v; | |
395 | } | |
396 | ||
397 | /* Find the HPTE in the hash table */ | |
398 | index = kvmppc_hv_find_lock_hpte(kvm, eaddr, slb_v, | |
399 | HPTE_V_VALID | HPTE_V_ABSENT); | |
400 | if (index < 0) | |
401 | return -ENOENT; | |
402 | hptep = (unsigned long *)(kvm->arch.hpt_virt + (index << 4)); | |
403 | v = hptep[0] & ~HPTE_V_HVLOCK; | |
404 | gr = kvm->arch.revmap[index].guest_rpte; | |
405 | ||
406 | /* Unlock the HPTE */ | |
407 | asm volatile("lwsync" : : : "memory"); | |
408 | hptep[0] = v; | |
409 | ||
410 | gpte->eaddr = eaddr; | |
411 | gpte->vpage = ((v & HPTE_V_AVPN) << 4) | ((eaddr >> 12) & 0xfff); | |
412 | ||
413 | /* Get PP bits and key for permission check */ | |
414 | pp = gr & (HPTE_R_PP0 | HPTE_R_PP); | |
415 | key = (vcpu->arch.shregs.msr & MSR_PR) ? SLB_VSID_KP : SLB_VSID_KS; | |
416 | key &= slb_v; | |
417 | ||
418 | /* Calculate permissions */ | |
419 | gpte->may_read = hpte_read_permission(pp, key); | |
420 | gpte->may_write = hpte_write_permission(pp, key); | |
421 | gpte->may_execute = gpte->may_read && !(gr & (HPTE_R_N | HPTE_R_G)); | |
422 | ||
423 | /* Storage key permission check for POWER7 */ | |
424 | if (data && virtmode && cpu_has_feature(CPU_FTR_ARCH_206)) { | |
425 | int amrfield = hpte_get_skey_perm(gr, vcpu->arch.amr); | |
426 | if (amrfield & 1) | |
427 | gpte->may_read = 0; | |
428 | if (amrfield & 2) | |
429 | gpte->may_write = 0; | |
430 | } | |
431 | ||
432 | /* Get the guest physical address */ | |
433 | gpte->raddr = kvmppc_mmu_get_real_addr(v, gr, eaddr); | |
434 | return 0; | |
435 | } | |
436 | ||
437 | /* | |
438 | * Quick test for whether an instruction is a load or a store. | |
439 | * If the instruction is a load or a store, then this will indicate | |
440 | * which it is, at least on server processors. (Embedded processors | |
441 | * have some external PID instructions that don't follow the rule | |
442 | * embodied here.) If the instruction isn't a load or store, then | |
443 | * this doesn't return anything useful. | |
444 | */ | |
445 | static int instruction_is_store(unsigned int instr) | |
446 | { | |
447 | unsigned int mask; | |
448 | ||
449 | mask = 0x10000000; | |
450 | if ((instr & 0xfc000000) == 0x7c000000) | |
451 | mask = 0x100; /* major opcode 31 */ | |
452 | return (instr & mask) != 0; | |
453 | } | |
454 | ||
455 | static int kvmppc_hv_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
456 | unsigned long gpa, int is_store) | |
457 | { | |
458 | int ret; | |
459 | u32 last_inst; | |
460 | unsigned long srr0 = kvmppc_get_pc(vcpu); | |
461 | ||
462 | /* We try to load the last instruction. We don't let | |
463 | * emulate_instruction do it as it doesn't check what | |
464 | * kvmppc_ld returns. | |
465 | * If we fail, we just return to the guest and try executing it again. | |
466 | */ | |
467 | if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED) { | |
468 | ret = kvmppc_ld(vcpu, &srr0, sizeof(u32), &last_inst, false); | |
469 | if (ret != EMULATE_DONE || last_inst == KVM_INST_FETCH_FAILED) | |
470 | return RESUME_GUEST; | |
471 | vcpu->arch.last_inst = last_inst; | |
472 | } | |
473 | ||
474 | /* | |
475 | * WARNING: We do not know for sure whether the instruction we just | |
476 | * read from memory is the same that caused the fault in the first | |
477 | * place. If the instruction we read is neither an load or a store, | |
478 | * then it can't access memory, so we don't need to worry about | |
479 | * enforcing access permissions. So, assuming it is a load or | |
480 | * store, we just check that its direction (load or store) is | |
481 | * consistent with the original fault, since that's what we | |
482 | * checked the access permissions against. If there is a mismatch | |
483 | * we just return and retry the instruction. | |
484 | */ | |
485 | ||
486 | if (instruction_is_store(vcpu->arch.last_inst) != !!is_store) | |
487 | return RESUME_GUEST; | |
488 | ||
489 | /* | |
490 | * Emulated accesses are emulated by looking at the hash for | |
491 | * translation once, then performing the access later. The | |
492 | * translation could be invalidated in the meantime in which | |
493 | * point performing the subsequent memory access on the old | |
494 | * physical address could possibly be a security hole for the | |
495 | * guest (but not the host). | |
496 | * | |
497 | * This is less of an issue for MMIO stores since they aren't | |
498 | * globally visible. It could be an issue for MMIO loads to | |
499 | * a certain extent but we'll ignore it for now. | |
500 | */ | |
501 | ||
502 | vcpu->arch.paddr_accessed = gpa; | |
503 | return kvmppc_emulate_mmio(run, vcpu); | |
504 | } | |
505 | ||
506 | int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, | |
507 | unsigned long ea, unsigned long dsisr) | |
508 | { | |
509 | struct kvm *kvm = vcpu->kvm; | |
342d3db7 PM |
510 | unsigned long *hptep, hpte[3], r; |
511 | unsigned long mmu_seq, psize, pte_size; | |
512 | unsigned long gfn, hva, pfn; | |
697d3899 | 513 | struct kvm_memory_slot *memslot; |
342d3db7 | 514 | unsigned long *rmap; |
697d3899 | 515 | struct revmap_entry *rev; |
342d3db7 PM |
516 | struct page *page, *pages[1]; |
517 | long index, ret, npages; | |
518 | unsigned long is_io; | |
4cf302bc | 519 | unsigned int writing, write_ok; |
342d3db7 | 520 | struct vm_area_struct *vma; |
bad3b507 | 521 | unsigned long rcbits; |
697d3899 PM |
522 | |
523 | /* | |
524 | * Real-mode code has already searched the HPT and found the | |
525 | * entry we're interested in. Lock the entry and check that | |
526 | * it hasn't changed. If it has, just return and re-execute the | |
527 | * instruction. | |
528 | */ | |
529 | if (ea != vcpu->arch.pgfault_addr) | |
530 | return RESUME_GUEST; | |
531 | index = vcpu->arch.pgfault_index; | |
532 | hptep = (unsigned long *)(kvm->arch.hpt_virt + (index << 4)); | |
533 | rev = &kvm->arch.revmap[index]; | |
534 | preempt_disable(); | |
535 | while (!try_lock_hpte(hptep, HPTE_V_HVLOCK)) | |
536 | cpu_relax(); | |
537 | hpte[0] = hptep[0] & ~HPTE_V_HVLOCK; | |
538 | hpte[1] = hptep[1]; | |
342d3db7 | 539 | hpte[2] = r = rev->guest_rpte; |
697d3899 PM |
540 | asm volatile("lwsync" : : : "memory"); |
541 | hptep[0] = hpte[0]; | |
542 | preempt_enable(); | |
543 | ||
544 | if (hpte[0] != vcpu->arch.pgfault_hpte[0] || | |
545 | hpte[1] != vcpu->arch.pgfault_hpte[1]) | |
546 | return RESUME_GUEST; | |
547 | ||
548 | /* Translate the logical address and get the page */ | |
342d3db7 PM |
549 | psize = hpte_page_size(hpte[0], r); |
550 | gfn = hpte_rpn(r, psize); | |
697d3899 PM |
551 | memslot = gfn_to_memslot(kvm, gfn); |
552 | ||
553 | /* No memslot means it's an emulated MMIO region */ | |
554 | if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) { | |
555 | unsigned long gpa = (gfn << PAGE_SHIFT) | (ea & (psize - 1)); | |
556 | return kvmppc_hv_emulate_mmio(run, vcpu, gpa, | |
557 | dsisr & DSISR_ISSTORE); | |
558 | } | |
559 | ||
342d3db7 PM |
560 | if (!kvm->arch.using_mmu_notifiers) |
561 | return -EFAULT; /* should never get here */ | |
562 | ||
563 | /* used to check for invalidations in progress */ | |
564 | mmu_seq = kvm->mmu_notifier_seq; | |
565 | smp_rmb(); | |
566 | ||
567 | is_io = 0; | |
568 | pfn = 0; | |
569 | page = NULL; | |
570 | pte_size = PAGE_SIZE; | |
4cf302bc PM |
571 | writing = (dsisr & DSISR_ISSTORE) != 0; |
572 | /* If writing != 0, then the HPTE must allow writing, if we get here */ | |
573 | write_ok = writing; | |
342d3db7 | 574 | hva = gfn_to_hva_memslot(memslot, gfn); |
4cf302bc | 575 | npages = get_user_pages_fast(hva, 1, writing, pages); |
342d3db7 PM |
576 | if (npages < 1) { |
577 | /* Check if it's an I/O mapping */ | |
578 | down_read(¤t->mm->mmap_sem); | |
579 | vma = find_vma(current->mm, hva); | |
580 | if (vma && vma->vm_start <= hva && hva + psize <= vma->vm_end && | |
581 | (vma->vm_flags & VM_PFNMAP)) { | |
582 | pfn = vma->vm_pgoff + | |
583 | ((hva - vma->vm_start) >> PAGE_SHIFT); | |
584 | pte_size = psize; | |
585 | is_io = hpte_cache_bits(pgprot_val(vma->vm_page_prot)); | |
4cf302bc | 586 | write_ok = vma->vm_flags & VM_WRITE; |
342d3db7 PM |
587 | } |
588 | up_read(¤t->mm->mmap_sem); | |
589 | if (!pfn) | |
590 | return -EFAULT; | |
591 | } else { | |
592 | page = pages[0]; | |
593 | if (PageHuge(page)) { | |
594 | page = compound_head(page); | |
595 | pte_size <<= compound_order(page); | |
596 | } | |
4cf302bc PM |
597 | /* if the guest wants write access, see if that is OK */ |
598 | if (!writing && hpte_is_writable(r)) { | |
599 | pte_t *ptep, pte; | |
600 | ||
601 | /* | |
602 | * We need to protect against page table destruction | |
603 | * while looking up and updating the pte. | |
604 | */ | |
605 | rcu_read_lock_sched(); | |
606 | ptep = find_linux_pte_or_hugepte(current->mm->pgd, | |
607 | hva, NULL); | |
608 | if (ptep && pte_present(*ptep)) { | |
609 | pte = kvmppc_read_update_linux_pte(ptep, 1); | |
610 | if (pte_write(pte)) | |
611 | write_ok = 1; | |
612 | } | |
613 | rcu_read_unlock_sched(); | |
614 | } | |
342d3db7 PM |
615 | pfn = page_to_pfn(page); |
616 | } | |
617 | ||
618 | ret = -EFAULT; | |
619 | if (psize > pte_size) | |
620 | goto out_put; | |
621 | ||
622 | /* Check WIMG vs. the actual page we're accessing */ | |
623 | if (!hpte_cache_flags_ok(r, is_io)) { | |
624 | if (is_io) | |
625 | return -EFAULT; | |
626 | /* | |
627 | * Allow guest to map emulated device memory as | |
628 | * uncacheable, but actually make it cacheable. | |
629 | */ | |
630 | r = (r & ~(HPTE_R_W|HPTE_R_I|HPTE_R_G)) | HPTE_R_M; | |
631 | } | |
632 | ||
633 | /* Set the HPTE to point to pfn */ | |
634 | r = (r & ~(HPTE_R_PP0 - pte_size)) | (pfn << PAGE_SHIFT); | |
4cf302bc PM |
635 | if (hpte_is_writable(r) && !write_ok) |
636 | r = hpte_make_readonly(r); | |
342d3db7 PM |
637 | ret = RESUME_GUEST; |
638 | preempt_disable(); | |
639 | while (!try_lock_hpte(hptep, HPTE_V_HVLOCK)) | |
640 | cpu_relax(); | |
641 | if ((hptep[0] & ~HPTE_V_HVLOCK) != hpte[0] || hptep[1] != hpte[1] || | |
642 | rev->guest_rpte != hpte[2]) | |
643 | /* HPTE has been changed under us; let the guest retry */ | |
644 | goto out_unlock; | |
645 | hpte[0] = (hpte[0] & ~HPTE_V_ABSENT) | HPTE_V_VALID; | |
646 | ||
647 | rmap = &memslot->rmap[gfn - memslot->base_gfn]; | |
648 | lock_rmap(rmap); | |
649 | ||
650 | /* Check if we might have been invalidated; let the guest retry if so */ | |
651 | ret = RESUME_GUEST; | |
652 | if (mmu_notifier_retry(vcpu, mmu_seq)) { | |
653 | unlock_rmap(rmap); | |
654 | goto out_unlock; | |
655 | } | |
4cf302bc | 656 | |
bad3b507 PM |
657 | /* Only set R/C in real HPTE if set in both *rmap and guest_rpte */ |
658 | rcbits = *rmap >> KVMPPC_RMAP_RC_SHIFT; | |
659 | r &= rcbits | ~(HPTE_R_R | HPTE_R_C); | |
660 | ||
4cf302bc PM |
661 | if (hptep[0] & HPTE_V_VALID) { |
662 | /* HPTE was previously valid, so we need to invalidate it */ | |
663 | unlock_rmap(rmap); | |
664 | hptep[0] |= HPTE_V_ABSENT; | |
665 | kvmppc_invalidate_hpte(kvm, hptep, index); | |
bad3b507 PM |
666 | /* don't lose previous R and C bits */ |
667 | r |= hptep[1] & (HPTE_R_R | HPTE_R_C); | |
4cf302bc PM |
668 | } else { |
669 | kvmppc_add_revmap_chain(kvm, rev, rmap, index, 0); | |
670 | } | |
342d3db7 PM |
671 | |
672 | hptep[1] = r; | |
673 | eieio(); | |
674 | hptep[0] = hpte[0]; | |
675 | asm volatile("ptesync" : : : "memory"); | |
676 | preempt_enable(); | |
4cf302bc | 677 | if (page && hpte_is_writable(r)) |
342d3db7 PM |
678 | SetPageDirty(page); |
679 | ||
680 | out_put: | |
681 | if (page) | |
682 | put_page(page); | |
683 | return ret; | |
684 | ||
685 | out_unlock: | |
686 | hptep[0] &= ~HPTE_V_HVLOCK; | |
687 | preempt_enable(); | |
688 | goto out_put; | |
689 | } | |
690 | ||
691 | static int kvm_handle_hva(struct kvm *kvm, unsigned long hva, | |
692 | int (*handler)(struct kvm *kvm, unsigned long *rmapp, | |
693 | unsigned long gfn)) | |
694 | { | |
695 | int ret; | |
696 | int retval = 0; | |
697 | struct kvm_memslots *slots; | |
698 | struct kvm_memory_slot *memslot; | |
699 | ||
700 | slots = kvm_memslots(kvm); | |
701 | kvm_for_each_memslot(memslot, slots) { | |
702 | unsigned long start = memslot->userspace_addr; | |
703 | unsigned long end; | |
704 | ||
705 | end = start + (memslot->npages << PAGE_SHIFT); | |
706 | if (hva >= start && hva < end) { | |
707 | gfn_t gfn_offset = (hva - start) >> PAGE_SHIFT; | |
708 | ||
709 | ret = handler(kvm, &memslot->rmap[gfn_offset], | |
710 | memslot->base_gfn + gfn_offset); | |
711 | retval |= ret; | |
712 | } | |
713 | } | |
714 | ||
715 | return retval; | |
716 | } | |
717 | ||
718 | static int kvm_unmap_rmapp(struct kvm *kvm, unsigned long *rmapp, | |
719 | unsigned long gfn) | |
720 | { | |
721 | struct revmap_entry *rev = kvm->arch.revmap; | |
722 | unsigned long h, i, j; | |
723 | unsigned long *hptep; | |
bad3b507 | 724 | unsigned long ptel, psize, rcbits; |
342d3db7 PM |
725 | |
726 | for (;;) { | |
bad3b507 | 727 | lock_rmap(rmapp); |
342d3db7 | 728 | if (!(*rmapp & KVMPPC_RMAP_PRESENT)) { |
bad3b507 | 729 | unlock_rmap(rmapp); |
342d3db7 PM |
730 | break; |
731 | } | |
732 | ||
733 | /* | |
734 | * To avoid an ABBA deadlock with the HPTE lock bit, | |
bad3b507 PM |
735 | * we can't spin on the HPTE lock while holding the |
736 | * rmap chain lock. | |
342d3db7 PM |
737 | */ |
738 | i = *rmapp & KVMPPC_RMAP_INDEX; | |
bad3b507 PM |
739 | hptep = (unsigned long *) (kvm->arch.hpt_virt + (i << 4)); |
740 | if (!try_lock_hpte(hptep, HPTE_V_HVLOCK)) { | |
741 | /* unlock rmap before spinning on the HPTE lock */ | |
742 | unlock_rmap(rmapp); | |
743 | while (hptep[0] & HPTE_V_HVLOCK) | |
744 | cpu_relax(); | |
745 | continue; | |
746 | } | |
342d3db7 PM |
747 | j = rev[i].forw; |
748 | if (j == i) { | |
749 | /* chain is now empty */ | |
bad3b507 | 750 | *rmapp &= ~(KVMPPC_RMAP_PRESENT | KVMPPC_RMAP_INDEX); |
342d3db7 PM |
751 | } else { |
752 | /* remove i from chain */ | |
753 | h = rev[i].back; | |
754 | rev[h].forw = j; | |
755 | rev[j].back = h; | |
756 | rev[i].forw = rev[i].back = i; | |
bad3b507 | 757 | *rmapp = (*rmapp & ~KVMPPC_RMAP_INDEX) | j; |
342d3db7 | 758 | } |
342d3db7 | 759 | |
bad3b507 | 760 | /* Now check and modify the HPTE */ |
342d3db7 PM |
761 | ptel = rev[i].guest_rpte; |
762 | psize = hpte_page_size(hptep[0], ptel); | |
763 | if ((hptep[0] & HPTE_V_VALID) && | |
764 | hpte_rpn(ptel, psize) == gfn) { | |
342d3db7 | 765 | hptep[0] |= HPTE_V_ABSENT; |
bad3b507 PM |
766 | kvmppc_invalidate_hpte(kvm, hptep, i); |
767 | /* Harvest R and C */ | |
768 | rcbits = hptep[1] & (HPTE_R_R | HPTE_R_C); | |
769 | *rmapp |= rcbits << KVMPPC_RMAP_RC_SHIFT; | |
770 | rev[i].guest_rpte = ptel | rcbits; | |
342d3db7 | 771 | } |
bad3b507 | 772 | unlock_rmap(rmapp); |
342d3db7 PM |
773 | hptep[0] &= ~HPTE_V_HVLOCK; |
774 | } | |
775 | return 0; | |
776 | } | |
777 | ||
778 | int kvm_unmap_hva(struct kvm *kvm, unsigned long hva) | |
779 | { | |
780 | if (kvm->arch.using_mmu_notifiers) | |
781 | kvm_handle_hva(kvm, hva, kvm_unmap_rmapp); | |
782 | return 0; | |
783 | } | |
784 | ||
785 | static int kvm_age_rmapp(struct kvm *kvm, unsigned long *rmapp, | |
786 | unsigned long gfn) | |
787 | { | |
55514893 PM |
788 | struct revmap_entry *rev = kvm->arch.revmap; |
789 | unsigned long head, i, j; | |
790 | unsigned long *hptep; | |
791 | int ret = 0; | |
792 | ||
793 | retry: | |
794 | lock_rmap(rmapp); | |
795 | if (*rmapp & KVMPPC_RMAP_REFERENCED) { | |
796 | *rmapp &= ~KVMPPC_RMAP_REFERENCED; | |
797 | ret = 1; | |
798 | } | |
799 | if (!(*rmapp & KVMPPC_RMAP_PRESENT)) { | |
800 | unlock_rmap(rmapp); | |
801 | return ret; | |
802 | } | |
803 | ||
804 | i = head = *rmapp & KVMPPC_RMAP_INDEX; | |
805 | do { | |
806 | hptep = (unsigned long *) (kvm->arch.hpt_virt + (i << 4)); | |
807 | j = rev[i].forw; | |
808 | ||
809 | /* If this HPTE isn't referenced, ignore it */ | |
810 | if (!(hptep[1] & HPTE_R_R)) | |
811 | continue; | |
812 | ||
813 | if (!try_lock_hpte(hptep, HPTE_V_HVLOCK)) { | |
814 | /* unlock rmap before spinning on the HPTE lock */ | |
815 | unlock_rmap(rmapp); | |
816 | while (hptep[0] & HPTE_V_HVLOCK) | |
817 | cpu_relax(); | |
818 | goto retry; | |
819 | } | |
820 | ||
821 | /* Now check and modify the HPTE */ | |
822 | if ((hptep[0] & HPTE_V_VALID) && (hptep[1] & HPTE_R_R)) { | |
823 | kvmppc_clear_ref_hpte(kvm, hptep, i); | |
824 | rev[i].guest_rpte |= HPTE_R_R; | |
825 | ret = 1; | |
826 | } | |
827 | hptep[0] &= ~HPTE_V_HVLOCK; | |
828 | } while ((i = j) != head); | |
829 | ||
830 | unlock_rmap(rmapp); | |
831 | return ret; | |
342d3db7 PM |
832 | } |
833 | ||
834 | int kvm_age_hva(struct kvm *kvm, unsigned long hva) | |
835 | { | |
836 | if (!kvm->arch.using_mmu_notifiers) | |
837 | return 0; | |
838 | return kvm_handle_hva(kvm, hva, kvm_age_rmapp); | |
839 | } | |
840 | ||
841 | static int kvm_test_age_rmapp(struct kvm *kvm, unsigned long *rmapp, | |
842 | unsigned long gfn) | |
843 | { | |
55514893 PM |
844 | struct revmap_entry *rev = kvm->arch.revmap; |
845 | unsigned long head, i, j; | |
846 | unsigned long *hp; | |
847 | int ret = 1; | |
848 | ||
849 | if (*rmapp & KVMPPC_RMAP_REFERENCED) | |
850 | return 1; | |
851 | ||
852 | lock_rmap(rmapp); | |
853 | if (*rmapp & KVMPPC_RMAP_REFERENCED) | |
854 | goto out; | |
855 | ||
856 | if (*rmapp & KVMPPC_RMAP_PRESENT) { | |
857 | i = head = *rmapp & KVMPPC_RMAP_INDEX; | |
858 | do { | |
859 | hp = (unsigned long *)(kvm->arch.hpt_virt + (i << 4)); | |
860 | j = rev[i].forw; | |
861 | if (hp[1] & HPTE_R_R) | |
862 | goto out; | |
863 | } while ((i = j) != head); | |
864 | } | |
865 | ret = 0; | |
866 | ||
867 | out: | |
868 | unlock_rmap(rmapp); | |
869 | return ret; | |
342d3db7 PM |
870 | } |
871 | ||
872 | int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) | |
873 | { | |
874 | if (!kvm->arch.using_mmu_notifiers) | |
875 | return 0; | |
876 | return kvm_handle_hva(kvm, hva, kvm_test_age_rmapp); | |
877 | } | |
878 | ||
879 | void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte) | |
880 | { | |
881 | if (!kvm->arch.using_mmu_notifiers) | |
882 | return; | |
883 | kvm_handle_hva(kvm, hva, kvm_unmap_rmapp); | |
de56a948 PM |
884 | } |
885 | ||
82ed3616 PM |
886 | static int kvm_test_clear_dirty(struct kvm *kvm, unsigned long *rmapp) |
887 | { | |
888 | struct revmap_entry *rev = kvm->arch.revmap; | |
889 | unsigned long head, i, j; | |
890 | unsigned long *hptep; | |
891 | int ret = 0; | |
892 | ||
893 | retry: | |
894 | lock_rmap(rmapp); | |
895 | if (*rmapp & KVMPPC_RMAP_CHANGED) { | |
896 | *rmapp &= ~KVMPPC_RMAP_CHANGED; | |
897 | ret = 1; | |
898 | } | |
899 | if (!(*rmapp & KVMPPC_RMAP_PRESENT)) { | |
900 | unlock_rmap(rmapp); | |
901 | return ret; | |
902 | } | |
903 | ||
904 | i = head = *rmapp & KVMPPC_RMAP_INDEX; | |
905 | do { | |
906 | hptep = (unsigned long *) (kvm->arch.hpt_virt + (i << 4)); | |
907 | j = rev[i].forw; | |
908 | ||
909 | if (!(hptep[1] & HPTE_R_C)) | |
910 | continue; | |
911 | ||
912 | if (!try_lock_hpte(hptep, HPTE_V_HVLOCK)) { | |
913 | /* unlock rmap before spinning on the HPTE lock */ | |
914 | unlock_rmap(rmapp); | |
915 | while (hptep[0] & HPTE_V_HVLOCK) | |
916 | cpu_relax(); | |
917 | goto retry; | |
918 | } | |
919 | ||
920 | /* Now check and modify the HPTE */ | |
921 | if ((hptep[0] & HPTE_V_VALID) && (hptep[1] & HPTE_R_C)) { | |
922 | /* need to make it temporarily absent to clear C */ | |
923 | hptep[0] |= HPTE_V_ABSENT; | |
924 | kvmppc_invalidate_hpte(kvm, hptep, i); | |
925 | hptep[1] &= ~HPTE_R_C; | |
926 | eieio(); | |
927 | hptep[0] = (hptep[0] & ~HPTE_V_ABSENT) | HPTE_V_VALID; | |
928 | rev[i].guest_rpte |= HPTE_R_C; | |
929 | ret = 1; | |
930 | } | |
931 | hptep[0] &= ~HPTE_V_HVLOCK; | |
932 | } while ((i = j) != head); | |
933 | ||
934 | unlock_rmap(rmapp); | |
935 | return ret; | |
936 | } | |
937 | ||
938 | long kvmppc_hv_get_dirty_log(struct kvm *kvm, struct kvm_memory_slot *memslot) | |
939 | { | |
940 | unsigned long i; | |
941 | unsigned long *rmapp, *map; | |
942 | ||
943 | preempt_disable(); | |
944 | rmapp = memslot->rmap; | |
945 | map = memslot->dirty_bitmap; | |
946 | for (i = 0; i < memslot->npages; ++i) { | |
947 | if (kvm_test_clear_dirty(kvm, rmapp)) | |
948 | __set_bit_le(i, map); | |
949 | ++rmapp; | |
950 | } | |
951 | preempt_enable(); | |
952 | return 0; | |
953 | } | |
954 | ||
93e60249 PM |
955 | void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long gpa, |
956 | unsigned long *nb_ret) | |
957 | { | |
958 | struct kvm_memory_slot *memslot; | |
959 | unsigned long gfn = gpa >> PAGE_SHIFT; | |
342d3db7 PM |
960 | struct page *page, *pages[1]; |
961 | int npages; | |
962 | unsigned long hva, psize, offset; | |
da9d1d7f | 963 | unsigned long pa; |
93e60249 PM |
964 | unsigned long *physp; |
965 | ||
966 | memslot = gfn_to_memslot(kvm, gfn); | |
967 | if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID)) | |
968 | return NULL; | |
342d3db7 PM |
969 | if (!kvm->arch.using_mmu_notifiers) { |
970 | physp = kvm->arch.slot_phys[memslot->id]; | |
971 | if (!physp) | |
c77162de | 972 | return NULL; |
342d3db7 | 973 | physp += gfn - memslot->base_gfn; |
c77162de | 974 | pa = *physp; |
342d3db7 PM |
975 | if (!pa) { |
976 | if (kvmppc_get_guest_page(kvm, gfn, memslot, | |
977 | PAGE_SIZE) < 0) | |
978 | return NULL; | |
979 | pa = *physp; | |
980 | } | |
981 | page = pfn_to_page(pa >> PAGE_SHIFT); | |
982 | } else { | |
983 | hva = gfn_to_hva_memslot(memslot, gfn); | |
984 | npages = get_user_pages_fast(hva, 1, 1, pages); | |
985 | if (npages < 1) | |
986 | return NULL; | |
987 | page = pages[0]; | |
c77162de | 988 | } |
da9d1d7f PM |
989 | psize = PAGE_SIZE; |
990 | if (PageHuge(page)) { | |
991 | page = compound_head(page); | |
992 | psize <<= compound_order(page); | |
993 | } | |
342d3db7 PM |
994 | if (!kvm->arch.using_mmu_notifiers) |
995 | get_page(page); | |
da9d1d7f | 996 | offset = gpa & (psize - 1); |
93e60249 | 997 | if (nb_ret) |
da9d1d7f | 998 | *nb_ret = psize - offset; |
93e60249 PM |
999 | return page_address(page) + offset; |
1000 | } | |
1001 | ||
1002 | void kvmppc_unpin_guest_page(struct kvm *kvm, void *va) | |
1003 | { | |
1004 | struct page *page = virt_to_page(va); | |
1005 | ||
1006 | page = compound_head(page); | |
1007 | put_page(page); | |
1008 | } | |
1009 | ||
de56a948 PM |
1010 | void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu) |
1011 | { | |
1012 | struct kvmppc_mmu *mmu = &vcpu->arch.mmu; | |
1013 | ||
9e368f29 PM |
1014 | if (cpu_has_feature(CPU_FTR_ARCH_206)) |
1015 | vcpu->arch.slb_nr = 32; /* POWER7 */ | |
1016 | else | |
1017 | vcpu->arch.slb_nr = 64; | |
de56a948 PM |
1018 | |
1019 | mmu->xlate = kvmppc_mmu_book3s_64_hv_xlate; | |
1020 | mmu->reset_msr = kvmppc_mmu_book3s_64_hv_reset_msr; | |
1021 | ||
1022 | vcpu->arch.hflags |= BOOK3S_HFLAG_SLB; | |
1023 | } |