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e1d3c0fd WD |
1 | /* |
2 | * CPU-agnostic ARM page table allocator. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
15 | * | |
16 | * Copyright (C) 2014 ARM Limited | |
17 | * | |
18 | * Author: Will Deacon <will.deacon@arm.com> | |
19 | */ | |
20 | ||
21 | #define pr_fmt(fmt) "arm-lpae io-pgtable: " fmt | |
22 | ||
23 | #include <linux/iommu.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/sizes.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/types.h> | |
28 | ||
29 | #include "io-pgtable.h" | |
30 | ||
31 | #define ARM_LPAE_MAX_ADDR_BITS 48 | |
32 | #define ARM_LPAE_S2_MAX_CONCAT_PAGES 16 | |
33 | #define ARM_LPAE_MAX_LEVELS 4 | |
34 | ||
35 | /* Struct accessors */ | |
36 | #define io_pgtable_to_data(x) \ | |
37 | container_of((x), struct arm_lpae_io_pgtable, iop) | |
38 | ||
39 | #define io_pgtable_ops_to_pgtable(x) \ | |
40 | container_of((x), struct io_pgtable, ops) | |
41 | ||
42 | #define io_pgtable_ops_to_data(x) \ | |
43 | io_pgtable_to_data(io_pgtable_ops_to_pgtable(x)) | |
44 | ||
45 | /* | |
46 | * For consistency with the architecture, we always consider | |
47 | * ARM_LPAE_MAX_LEVELS levels, with the walk starting at level n >=0 | |
48 | */ | |
49 | #define ARM_LPAE_START_LVL(d) (ARM_LPAE_MAX_LEVELS - (d)->levels) | |
50 | ||
51 | /* | |
52 | * Calculate the right shift amount to get to the portion describing level l | |
53 | * in a virtual address mapped by the pagetable in d. | |
54 | */ | |
55 | #define ARM_LPAE_LVL_SHIFT(l,d) \ | |
56 | ((((d)->levels - ((l) - ARM_LPAE_START_LVL(d) + 1)) \ | |
57 | * (d)->bits_per_level) + (d)->pg_shift) | |
58 | ||
367bd978 WD |
59 | #define ARM_LPAE_PAGES_PER_PGD(d) \ |
60 | DIV_ROUND_UP((d)->pgd_size, 1UL << (d)->pg_shift) | |
e1d3c0fd WD |
61 | |
62 | /* | |
63 | * Calculate the index at level l used to map virtual address a using the | |
64 | * pagetable in d. | |
65 | */ | |
66 | #define ARM_LPAE_PGD_IDX(l,d) \ | |
67 | ((l) == ARM_LPAE_START_LVL(d) ? ilog2(ARM_LPAE_PAGES_PER_PGD(d)) : 0) | |
68 | ||
69 | #define ARM_LPAE_LVL_IDX(a,l,d) \ | |
367bd978 | 70 | (((u64)(a) >> ARM_LPAE_LVL_SHIFT(l,d)) & \ |
e1d3c0fd WD |
71 | ((1 << ((d)->bits_per_level + ARM_LPAE_PGD_IDX(l,d))) - 1)) |
72 | ||
73 | /* Calculate the block/page mapping size at level l for pagetable in d. */ | |
74 | #define ARM_LPAE_BLOCK_SIZE(l,d) \ | |
75 | (1 << (ilog2(sizeof(arm_lpae_iopte)) + \ | |
76 | ((ARM_LPAE_MAX_LEVELS - (l)) * (d)->bits_per_level))) | |
77 | ||
78 | /* Page table bits */ | |
79 | #define ARM_LPAE_PTE_TYPE_SHIFT 0 | |
80 | #define ARM_LPAE_PTE_TYPE_MASK 0x3 | |
81 | ||
82 | #define ARM_LPAE_PTE_TYPE_BLOCK 1 | |
83 | #define ARM_LPAE_PTE_TYPE_TABLE 3 | |
84 | #define ARM_LPAE_PTE_TYPE_PAGE 3 | |
85 | ||
c896c132 | 86 | #define ARM_LPAE_PTE_NSTABLE (((arm_lpae_iopte)1) << 63) |
e1d3c0fd WD |
87 | #define ARM_LPAE_PTE_XN (((arm_lpae_iopte)3) << 53) |
88 | #define ARM_LPAE_PTE_AF (((arm_lpae_iopte)1) << 10) | |
89 | #define ARM_LPAE_PTE_SH_NS (((arm_lpae_iopte)0) << 8) | |
90 | #define ARM_LPAE_PTE_SH_OS (((arm_lpae_iopte)2) << 8) | |
91 | #define ARM_LPAE_PTE_SH_IS (((arm_lpae_iopte)3) << 8) | |
c896c132 | 92 | #define ARM_LPAE_PTE_NS (((arm_lpae_iopte)1) << 5) |
e1d3c0fd WD |
93 | #define ARM_LPAE_PTE_VALID (((arm_lpae_iopte)1) << 0) |
94 | ||
95 | #define ARM_LPAE_PTE_ATTR_LO_MASK (((arm_lpae_iopte)0x3ff) << 2) | |
96 | /* Ignore the contiguous bit for block splitting */ | |
97 | #define ARM_LPAE_PTE_ATTR_HI_MASK (((arm_lpae_iopte)6) << 52) | |
98 | #define ARM_LPAE_PTE_ATTR_MASK (ARM_LPAE_PTE_ATTR_LO_MASK | \ | |
99 | ARM_LPAE_PTE_ATTR_HI_MASK) | |
100 | ||
101 | /* Stage-1 PTE */ | |
102 | #define ARM_LPAE_PTE_AP_UNPRIV (((arm_lpae_iopte)1) << 6) | |
103 | #define ARM_LPAE_PTE_AP_RDONLY (((arm_lpae_iopte)2) << 6) | |
104 | #define ARM_LPAE_PTE_ATTRINDX_SHIFT 2 | |
105 | #define ARM_LPAE_PTE_nG (((arm_lpae_iopte)1) << 11) | |
106 | ||
107 | /* Stage-2 PTE */ | |
108 | #define ARM_LPAE_PTE_HAP_FAULT (((arm_lpae_iopte)0) << 6) | |
109 | #define ARM_LPAE_PTE_HAP_READ (((arm_lpae_iopte)1) << 6) | |
110 | #define ARM_LPAE_PTE_HAP_WRITE (((arm_lpae_iopte)2) << 6) | |
111 | #define ARM_LPAE_PTE_MEMATTR_OIWB (((arm_lpae_iopte)0xf) << 2) | |
112 | #define ARM_LPAE_PTE_MEMATTR_NC (((arm_lpae_iopte)0x5) << 2) | |
113 | #define ARM_LPAE_PTE_MEMATTR_DEV (((arm_lpae_iopte)0x1) << 2) | |
114 | ||
115 | /* Register bits */ | |
116 | #define ARM_32_LPAE_TCR_EAE (1 << 31) | |
117 | #define ARM_64_LPAE_S2_TCR_RES1 (1 << 31) | |
118 | ||
119 | #define ARM_LPAE_TCR_TG0_4K (0 << 14) | |
120 | #define ARM_LPAE_TCR_TG0_64K (1 << 14) | |
121 | #define ARM_LPAE_TCR_TG0_16K (2 << 14) | |
122 | ||
123 | #define ARM_LPAE_TCR_SH0_SHIFT 12 | |
124 | #define ARM_LPAE_TCR_SH0_MASK 0x3 | |
125 | #define ARM_LPAE_TCR_SH_NS 0 | |
126 | #define ARM_LPAE_TCR_SH_OS 2 | |
127 | #define ARM_LPAE_TCR_SH_IS 3 | |
128 | ||
129 | #define ARM_LPAE_TCR_ORGN0_SHIFT 10 | |
130 | #define ARM_LPAE_TCR_IRGN0_SHIFT 8 | |
131 | #define ARM_LPAE_TCR_RGN_MASK 0x3 | |
132 | #define ARM_LPAE_TCR_RGN_NC 0 | |
133 | #define ARM_LPAE_TCR_RGN_WBWA 1 | |
134 | #define ARM_LPAE_TCR_RGN_WT 2 | |
135 | #define ARM_LPAE_TCR_RGN_WB 3 | |
136 | ||
137 | #define ARM_LPAE_TCR_SL0_SHIFT 6 | |
138 | #define ARM_LPAE_TCR_SL0_MASK 0x3 | |
139 | ||
140 | #define ARM_LPAE_TCR_T0SZ_SHIFT 0 | |
141 | #define ARM_LPAE_TCR_SZ_MASK 0xf | |
142 | ||
143 | #define ARM_LPAE_TCR_PS_SHIFT 16 | |
144 | #define ARM_LPAE_TCR_PS_MASK 0x7 | |
145 | ||
146 | #define ARM_LPAE_TCR_IPS_SHIFT 32 | |
147 | #define ARM_LPAE_TCR_IPS_MASK 0x7 | |
148 | ||
149 | #define ARM_LPAE_TCR_PS_32_BIT 0x0ULL | |
150 | #define ARM_LPAE_TCR_PS_36_BIT 0x1ULL | |
151 | #define ARM_LPAE_TCR_PS_40_BIT 0x2ULL | |
152 | #define ARM_LPAE_TCR_PS_42_BIT 0x3ULL | |
153 | #define ARM_LPAE_TCR_PS_44_BIT 0x4ULL | |
154 | #define ARM_LPAE_TCR_PS_48_BIT 0x5ULL | |
155 | ||
156 | #define ARM_LPAE_MAIR_ATTR_SHIFT(n) ((n) << 3) | |
157 | #define ARM_LPAE_MAIR_ATTR_MASK 0xff | |
158 | #define ARM_LPAE_MAIR_ATTR_DEVICE 0x04 | |
159 | #define ARM_LPAE_MAIR_ATTR_NC 0x44 | |
160 | #define ARM_LPAE_MAIR_ATTR_WBRWA 0xff | |
161 | #define ARM_LPAE_MAIR_ATTR_IDX_NC 0 | |
162 | #define ARM_LPAE_MAIR_ATTR_IDX_CACHE 1 | |
163 | #define ARM_LPAE_MAIR_ATTR_IDX_DEV 2 | |
164 | ||
165 | /* IOPTE accessors */ | |
166 | #define iopte_deref(pte,d) \ | |
167 | (__va((pte) & ((1ULL << ARM_LPAE_MAX_ADDR_BITS) - 1) \ | |
168 | & ~((1ULL << (d)->pg_shift) - 1))) | |
169 | ||
170 | #define iopte_type(pte,l) \ | |
171 | (((pte) >> ARM_LPAE_PTE_TYPE_SHIFT) & ARM_LPAE_PTE_TYPE_MASK) | |
172 | ||
173 | #define iopte_prot(pte) ((pte) & ARM_LPAE_PTE_ATTR_MASK) | |
174 | ||
175 | #define iopte_leaf(pte,l) \ | |
176 | (l == (ARM_LPAE_MAX_LEVELS - 1) ? \ | |
177 | (iopte_type(pte,l) == ARM_LPAE_PTE_TYPE_PAGE) : \ | |
178 | (iopte_type(pte,l) == ARM_LPAE_PTE_TYPE_BLOCK)) | |
179 | ||
180 | #define iopte_to_pfn(pte,d) \ | |
181 | (((pte) & ((1ULL << ARM_LPAE_MAX_ADDR_BITS) - 1)) >> (d)->pg_shift) | |
182 | ||
183 | #define pfn_to_iopte(pfn,d) \ | |
184 | (((pfn) << (d)->pg_shift) & ((1ULL << ARM_LPAE_MAX_ADDR_BITS) - 1)) | |
185 | ||
186 | struct arm_lpae_io_pgtable { | |
187 | struct io_pgtable iop; | |
188 | ||
189 | int levels; | |
190 | size_t pgd_size; | |
191 | unsigned long pg_shift; | |
192 | unsigned long bits_per_level; | |
193 | ||
194 | void *pgd; | |
195 | }; | |
196 | ||
197 | typedef u64 arm_lpae_iopte; | |
198 | ||
fe4b991d WD |
199 | static bool selftest_running = false; |
200 | ||
e1d3c0fd WD |
201 | static int arm_lpae_init_pte(struct arm_lpae_io_pgtable *data, |
202 | unsigned long iova, phys_addr_t paddr, | |
203 | arm_lpae_iopte prot, int lvl, | |
204 | arm_lpae_iopte *ptep) | |
205 | { | |
206 | arm_lpae_iopte pte = prot; | |
207 | ||
208 | /* We require an unmap first */ | |
fe4b991d WD |
209 | if (iopte_leaf(*ptep, lvl)) { |
210 | WARN_ON(!selftest_running); | |
e1d3c0fd | 211 | return -EEXIST; |
fe4b991d | 212 | } |
e1d3c0fd | 213 | |
c896c132 LP |
214 | if (data->iop.cfg.quirks & IO_PGTABLE_QUIRK_ARM_NS) |
215 | pte |= ARM_LPAE_PTE_NS; | |
216 | ||
e1d3c0fd WD |
217 | if (lvl == ARM_LPAE_MAX_LEVELS - 1) |
218 | pte |= ARM_LPAE_PTE_TYPE_PAGE; | |
219 | else | |
220 | pte |= ARM_LPAE_PTE_TYPE_BLOCK; | |
221 | ||
222 | pte |= ARM_LPAE_PTE_AF | ARM_LPAE_PTE_SH_IS; | |
223 | pte |= pfn_to_iopte(paddr >> data->pg_shift, data); | |
224 | ||
225 | *ptep = pte; | |
226 | data->iop.cfg.tlb->flush_pgtable(ptep, sizeof(*ptep), data->iop.cookie); | |
227 | return 0; | |
228 | } | |
229 | ||
230 | static int __arm_lpae_map(struct arm_lpae_io_pgtable *data, unsigned long iova, | |
231 | phys_addr_t paddr, size_t size, arm_lpae_iopte prot, | |
232 | int lvl, arm_lpae_iopte *ptep) | |
233 | { | |
234 | arm_lpae_iopte *cptep, pte; | |
235 | void *cookie = data->iop.cookie; | |
236 | size_t block_size = ARM_LPAE_BLOCK_SIZE(lvl, data); | |
237 | ||
238 | /* Find our entry at the current level */ | |
239 | ptep += ARM_LPAE_LVL_IDX(iova, lvl, data); | |
240 | ||
241 | /* If we can install a leaf entry at this level, then do so */ | |
242 | if (size == block_size && (size & data->iop.cfg.pgsize_bitmap)) | |
243 | return arm_lpae_init_pte(data, iova, paddr, prot, lvl, ptep); | |
244 | ||
245 | /* We can't allocate tables at the final level */ | |
246 | if (WARN_ON(lvl >= ARM_LPAE_MAX_LEVELS - 1)) | |
247 | return -EINVAL; | |
248 | ||
249 | /* Grab a pointer to the next level */ | |
250 | pte = *ptep; | |
251 | if (!pte) { | |
252 | cptep = alloc_pages_exact(1UL << data->pg_shift, | |
253 | GFP_ATOMIC | __GFP_ZERO); | |
254 | if (!cptep) | |
255 | return -ENOMEM; | |
256 | ||
257 | data->iop.cfg.tlb->flush_pgtable(cptep, 1UL << data->pg_shift, | |
258 | cookie); | |
259 | pte = __pa(cptep) | ARM_LPAE_PTE_TYPE_TABLE; | |
c896c132 LP |
260 | if (data->iop.cfg.quirks & IO_PGTABLE_QUIRK_ARM_NS) |
261 | pte |= ARM_LPAE_PTE_NSTABLE; | |
e1d3c0fd WD |
262 | *ptep = pte; |
263 | data->iop.cfg.tlb->flush_pgtable(ptep, sizeof(*ptep), cookie); | |
264 | } else { | |
265 | cptep = iopte_deref(pte, data); | |
266 | } | |
267 | ||
268 | /* Rinse, repeat */ | |
269 | return __arm_lpae_map(data, iova, paddr, size, prot, lvl + 1, cptep); | |
270 | } | |
271 | ||
272 | static arm_lpae_iopte arm_lpae_prot_to_pte(struct arm_lpae_io_pgtable *data, | |
273 | int prot) | |
274 | { | |
275 | arm_lpae_iopte pte; | |
276 | ||
277 | if (data->iop.fmt == ARM_64_LPAE_S1 || | |
278 | data->iop.fmt == ARM_32_LPAE_S1) { | |
279 | pte = ARM_LPAE_PTE_AP_UNPRIV | ARM_LPAE_PTE_nG; | |
280 | ||
281 | if (!(prot & IOMMU_WRITE) && (prot & IOMMU_READ)) | |
282 | pte |= ARM_LPAE_PTE_AP_RDONLY; | |
283 | ||
284 | if (prot & IOMMU_CACHE) | |
285 | pte |= (ARM_LPAE_MAIR_ATTR_IDX_CACHE | |
286 | << ARM_LPAE_PTE_ATTRINDX_SHIFT); | |
287 | } else { | |
288 | pte = ARM_LPAE_PTE_HAP_FAULT; | |
289 | if (prot & IOMMU_READ) | |
290 | pte |= ARM_LPAE_PTE_HAP_READ; | |
291 | if (prot & IOMMU_WRITE) | |
292 | pte |= ARM_LPAE_PTE_HAP_WRITE; | |
293 | if (prot & IOMMU_CACHE) | |
294 | pte |= ARM_LPAE_PTE_MEMATTR_OIWB; | |
295 | else | |
296 | pte |= ARM_LPAE_PTE_MEMATTR_NC; | |
297 | } | |
298 | ||
299 | if (prot & IOMMU_NOEXEC) | |
300 | pte |= ARM_LPAE_PTE_XN; | |
301 | ||
302 | return pte; | |
303 | } | |
304 | ||
305 | static int arm_lpae_map(struct io_pgtable_ops *ops, unsigned long iova, | |
306 | phys_addr_t paddr, size_t size, int iommu_prot) | |
307 | { | |
308 | struct arm_lpae_io_pgtable *data = io_pgtable_ops_to_data(ops); | |
309 | arm_lpae_iopte *ptep = data->pgd; | |
310 | int lvl = ARM_LPAE_START_LVL(data); | |
311 | arm_lpae_iopte prot; | |
312 | ||
313 | /* If no access, then nothing to do */ | |
314 | if (!(iommu_prot & (IOMMU_READ | IOMMU_WRITE))) | |
315 | return 0; | |
316 | ||
317 | prot = arm_lpae_prot_to_pte(data, iommu_prot); | |
318 | return __arm_lpae_map(data, iova, paddr, size, prot, lvl, ptep); | |
319 | } | |
320 | ||
321 | static void __arm_lpae_free_pgtable(struct arm_lpae_io_pgtable *data, int lvl, | |
322 | arm_lpae_iopte *ptep) | |
323 | { | |
324 | arm_lpae_iopte *start, *end; | |
325 | unsigned long table_size; | |
326 | ||
327 | /* Only leaf entries at the last level */ | |
328 | if (lvl == ARM_LPAE_MAX_LEVELS - 1) | |
329 | return; | |
330 | ||
331 | if (lvl == ARM_LPAE_START_LVL(data)) | |
332 | table_size = data->pgd_size; | |
333 | else | |
334 | table_size = 1UL << data->pg_shift; | |
335 | ||
336 | start = ptep; | |
337 | end = (void *)ptep + table_size; | |
338 | ||
339 | while (ptep != end) { | |
340 | arm_lpae_iopte pte = *ptep++; | |
341 | ||
342 | if (!pte || iopte_leaf(pte, lvl)) | |
343 | continue; | |
344 | ||
345 | __arm_lpae_free_pgtable(data, lvl + 1, iopte_deref(pte, data)); | |
346 | } | |
347 | ||
348 | free_pages_exact(start, table_size); | |
349 | } | |
350 | ||
351 | static void arm_lpae_free_pgtable(struct io_pgtable *iop) | |
352 | { | |
353 | struct arm_lpae_io_pgtable *data = io_pgtable_to_data(iop); | |
354 | ||
355 | __arm_lpae_free_pgtable(data, ARM_LPAE_START_LVL(data), data->pgd); | |
356 | kfree(data); | |
357 | } | |
358 | ||
359 | static int arm_lpae_split_blk_unmap(struct arm_lpae_io_pgtable *data, | |
360 | unsigned long iova, size_t size, | |
361 | arm_lpae_iopte prot, int lvl, | |
362 | arm_lpae_iopte *ptep, size_t blk_size) | |
363 | { | |
364 | unsigned long blk_start, blk_end; | |
365 | phys_addr_t blk_paddr; | |
366 | arm_lpae_iopte table = 0; | |
367 | void *cookie = data->iop.cookie; | |
368 | const struct iommu_gather_ops *tlb = data->iop.cfg.tlb; | |
369 | ||
370 | blk_start = iova & ~(blk_size - 1); | |
371 | blk_end = blk_start + blk_size; | |
372 | blk_paddr = iopte_to_pfn(*ptep, data) << data->pg_shift; | |
373 | ||
374 | for (; blk_start < blk_end; blk_start += size, blk_paddr += size) { | |
375 | arm_lpae_iopte *tablep; | |
376 | ||
377 | /* Unmap! */ | |
378 | if (blk_start == iova) | |
379 | continue; | |
380 | ||
381 | /* __arm_lpae_map expects a pointer to the start of the table */ | |
382 | tablep = &table - ARM_LPAE_LVL_IDX(blk_start, lvl, data); | |
383 | if (__arm_lpae_map(data, blk_start, blk_paddr, size, prot, lvl, | |
384 | tablep) < 0) { | |
385 | if (table) { | |
386 | /* Free the table we allocated */ | |
387 | tablep = iopte_deref(table, data); | |
388 | __arm_lpae_free_pgtable(data, lvl + 1, tablep); | |
389 | } | |
390 | return 0; /* Bytes unmapped */ | |
391 | } | |
392 | } | |
393 | ||
394 | *ptep = table; | |
395 | tlb->flush_pgtable(ptep, sizeof(*ptep), cookie); | |
396 | iova &= ~(blk_size - 1); | |
397 | tlb->tlb_add_flush(iova, blk_size, true, cookie); | |
398 | return size; | |
399 | } | |
400 | ||
401 | static int __arm_lpae_unmap(struct arm_lpae_io_pgtable *data, | |
402 | unsigned long iova, size_t size, int lvl, | |
403 | arm_lpae_iopte *ptep) | |
404 | { | |
405 | arm_lpae_iopte pte; | |
406 | const struct iommu_gather_ops *tlb = data->iop.cfg.tlb; | |
407 | void *cookie = data->iop.cookie; | |
408 | size_t blk_size = ARM_LPAE_BLOCK_SIZE(lvl, data); | |
409 | ||
410 | ptep += ARM_LPAE_LVL_IDX(iova, lvl, data); | |
411 | pte = *ptep; | |
412 | ||
413 | /* Something went horribly wrong and we ran out of page table */ | |
414 | if (WARN_ON(!pte || (lvl == ARM_LPAE_MAX_LEVELS))) | |
415 | return 0; | |
416 | ||
417 | /* If the size matches this level, we're in the right place */ | |
418 | if (size == blk_size) { | |
419 | *ptep = 0; | |
420 | tlb->flush_pgtable(ptep, sizeof(*ptep), cookie); | |
421 | ||
422 | if (!iopte_leaf(pte, lvl)) { | |
423 | /* Also flush any partial walks */ | |
424 | tlb->tlb_add_flush(iova, size, false, cookie); | |
425 | tlb->tlb_sync(data->iop.cookie); | |
426 | ptep = iopte_deref(pte, data); | |
427 | __arm_lpae_free_pgtable(data, lvl + 1, ptep); | |
428 | } else { | |
429 | tlb->tlb_add_flush(iova, size, true, cookie); | |
430 | } | |
431 | ||
432 | return size; | |
433 | } else if (iopte_leaf(pte, lvl)) { | |
434 | /* | |
435 | * Insert a table at the next level to map the old region, | |
436 | * minus the part we want to unmap | |
437 | */ | |
438 | return arm_lpae_split_blk_unmap(data, iova, size, | |
439 | iopte_prot(pte), lvl, ptep, | |
440 | blk_size); | |
441 | } | |
442 | ||
443 | /* Keep on walkin' */ | |
444 | ptep = iopte_deref(pte, data); | |
445 | return __arm_lpae_unmap(data, iova, size, lvl + 1, ptep); | |
446 | } | |
447 | ||
448 | static int arm_lpae_unmap(struct io_pgtable_ops *ops, unsigned long iova, | |
449 | size_t size) | |
450 | { | |
451 | size_t unmapped; | |
452 | struct arm_lpae_io_pgtable *data = io_pgtable_ops_to_data(ops); | |
453 | struct io_pgtable *iop = &data->iop; | |
454 | arm_lpae_iopte *ptep = data->pgd; | |
455 | int lvl = ARM_LPAE_START_LVL(data); | |
456 | ||
457 | unmapped = __arm_lpae_unmap(data, iova, size, lvl, ptep); | |
458 | if (unmapped) | |
459 | iop->cfg.tlb->tlb_sync(iop->cookie); | |
460 | ||
461 | return unmapped; | |
462 | } | |
463 | ||
464 | static phys_addr_t arm_lpae_iova_to_phys(struct io_pgtable_ops *ops, | |
465 | unsigned long iova) | |
466 | { | |
467 | struct arm_lpae_io_pgtable *data = io_pgtable_ops_to_data(ops); | |
468 | arm_lpae_iopte pte, *ptep = data->pgd; | |
469 | int lvl = ARM_LPAE_START_LVL(data); | |
470 | ||
471 | do { | |
472 | /* Valid IOPTE pointer? */ | |
473 | if (!ptep) | |
474 | return 0; | |
475 | ||
476 | /* Grab the IOPTE we're interested in */ | |
477 | pte = *(ptep + ARM_LPAE_LVL_IDX(iova, lvl, data)); | |
478 | ||
479 | /* Valid entry? */ | |
480 | if (!pte) | |
481 | return 0; | |
482 | ||
483 | /* Leaf entry? */ | |
484 | if (iopte_leaf(pte,lvl)) | |
485 | goto found_translation; | |
486 | ||
487 | /* Take it to the next level */ | |
488 | ptep = iopte_deref(pte, data); | |
489 | } while (++lvl < ARM_LPAE_MAX_LEVELS); | |
490 | ||
491 | /* Ran out of page tables to walk */ | |
492 | return 0; | |
493 | ||
494 | found_translation: | |
495 | iova &= ((1 << data->pg_shift) - 1); | |
496 | return ((phys_addr_t)iopte_to_pfn(pte,data) << data->pg_shift) | iova; | |
497 | } | |
498 | ||
499 | static void arm_lpae_restrict_pgsizes(struct io_pgtable_cfg *cfg) | |
500 | { | |
501 | unsigned long granule; | |
502 | ||
503 | /* | |
504 | * We need to restrict the supported page sizes to match the | |
505 | * translation regime for a particular granule. Aim to match | |
506 | * the CPU page size if possible, otherwise prefer smaller sizes. | |
507 | * While we're at it, restrict the block sizes to match the | |
508 | * chosen granule. | |
509 | */ | |
510 | if (cfg->pgsize_bitmap & PAGE_SIZE) | |
511 | granule = PAGE_SIZE; | |
512 | else if (cfg->pgsize_bitmap & ~PAGE_MASK) | |
513 | granule = 1UL << __fls(cfg->pgsize_bitmap & ~PAGE_MASK); | |
514 | else if (cfg->pgsize_bitmap & PAGE_MASK) | |
515 | granule = 1UL << __ffs(cfg->pgsize_bitmap & PAGE_MASK); | |
516 | else | |
517 | granule = 0; | |
518 | ||
519 | switch (granule) { | |
520 | case SZ_4K: | |
521 | cfg->pgsize_bitmap &= (SZ_4K | SZ_2M | SZ_1G); | |
522 | break; | |
523 | case SZ_16K: | |
524 | cfg->pgsize_bitmap &= (SZ_16K | SZ_32M); | |
525 | break; | |
526 | case SZ_64K: | |
527 | cfg->pgsize_bitmap &= (SZ_64K | SZ_512M); | |
528 | break; | |
529 | default: | |
530 | cfg->pgsize_bitmap = 0; | |
531 | } | |
532 | } | |
533 | ||
534 | static struct arm_lpae_io_pgtable * | |
535 | arm_lpae_alloc_pgtable(struct io_pgtable_cfg *cfg) | |
536 | { | |
537 | unsigned long va_bits, pgd_bits; | |
538 | struct arm_lpae_io_pgtable *data; | |
539 | ||
540 | arm_lpae_restrict_pgsizes(cfg); | |
541 | ||
542 | if (!(cfg->pgsize_bitmap & (SZ_4K | SZ_16K | SZ_64K))) | |
543 | return NULL; | |
544 | ||
545 | if (cfg->ias > ARM_LPAE_MAX_ADDR_BITS) | |
546 | return NULL; | |
547 | ||
548 | if (cfg->oas > ARM_LPAE_MAX_ADDR_BITS) | |
549 | return NULL; | |
550 | ||
551 | data = kmalloc(sizeof(*data), GFP_KERNEL); | |
552 | if (!data) | |
553 | return NULL; | |
554 | ||
555 | data->pg_shift = __ffs(cfg->pgsize_bitmap); | |
556 | data->bits_per_level = data->pg_shift - ilog2(sizeof(arm_lpae_iopte)); | |
557 | ||
558 | va_bits = cfg->ias - data->pg_shift; | |
559 | data->levels = DIV_ROUND_UP(va_bits, data->bits_per_level); | |
560 | ||
561 | /* Calculate the actual size of our pgd (without concatenation) */ | |
562 | pgd_bits = va_bits - (data->bits_per_level * (data->levels - 1)); | |
563 | data->pgd_size = 1UL << (pgd_bits + ilog2(sizeof(arm_lpae_iopte))); | |
564 | ||
565 | data->iop.ops = (struct io_pgtable_ops) { | |
566 | .map = arm_lpae_map, | |
567 | .unmap = arm_lpae_unmap, | |
568 | .iova_to_phys = arm_lpae_iova_to_phys, | |
569 | }; | |
570 | ||
571 | return data; | |
572 | } | |
573 | ||
574 | static struct io_pgtable * | |
575 | arm_64_lpae_alloc_pgtable_s1(struct io_pgtable_cfg *cfg, void *cookie) | |
576 | { | |
577 | u64 reg; | |
578 | struct arm_lpae_io_pgtable *data = arm_lpae_alloc_pgtable(cfg); | |
579 | ||
580 | if (!data) | |
581 | return NULL; | |
582 | ||
583 | /* TCR */ | |
584 | reg = (ARM_LPAE_TCR_SH_IS << ARM_LPAE_TCR_SH0_SHIFT) | | |
585 | (ARM_LPAE_TCR_RGN_WBWA << ARM_LPAE_TCR_IRGN0_SHIFT) | | |
586 | (ARM_LPAE_TCR_RGN_WBWA << ARM_LPAE_TCR_ORGN0_SHIFT); | |
587 | ||
588 | switch (1 << data->pg_shift) { | |
589 | case SZ_4K: | |
590 | reg |= ARM_LPAE_TCR_TG0_4K; | |
591 | break; | |
592 | case SZ_16K: | |
593 | reg |= ARM_LPAE_TCR_TG0_16K; | |
594 | break; | |
595 | case SZ_64K: | |
596 | reg |= ARM_LPAE_TCR_TG0_64K; | |
597 | break; | |
598 | } | |
599 | ||
600 | switch (cfg->oas) { | |
601 | case 32: | |
602 | reg |= (ARM_LPAE_TCR_PS_32_BIT << ARM_LPAE_TCR_IPS_SHIFT); | |
603 | break; | |
604 | case 36: | |
605 | reg |= (ARM_LPAE_TCR_PS_36_BIT << ARM_LPAE_TCR_IPS_SHIFT); | |
606 | break; | |
607 | case 40: | |
608 | reg |= (ARM_LPAE_TCR_PS_40_BIT << ARM_LPAE_TCR_IPS_SHIFT); | |
609 | break; | |
610 | case 42: | |
611 | reg |= (ARM_LPAE_TCR_PS_42_BIT << ARM_LPAE_TCR_IPS_SHIFT); | |
612 | break; | |
613 | case 44: | |
614 | reg |= (ARM_LPAE_TCR_PS_44_BIT << ARM_LPAE_TCR_IPS_SHIFT); | |
615 | break; | |
616 | case 48: | |
617 | reg |= (ARM_LPAE_TCR_PS_48_BIT << ARM_LPAE_TCR_IPS_SHIFT); | |
618 | break; | |
619 | default: | |
620 | goto out_free_data; | |
621 | } | |
622 | ||
623 | reg |= (64ULL - cfg->ias) << ARM_LPAE_TCR_T0SZ_SHIFT; | |
624 | cfg->arm_lpae_s1_cfg.tcr = reg; | |
625 | ||
626 | /* MAIRs */ | |
627 | reg = (ARM_LPAE_MAIR_ATTR_NC | |
628 | << ARM_LPAE_MAIR_ATTR_SHIFT(ARM_LPAE_MAIR_ATTR_IDX_NC)) | | |
629 | (ARM_LPAE_MAIR_ATTR_WBRWA | |
630 | << ARM_LPAE_MAIR_ATTR_SHIFT(ARM_LPAE_MAIR_ATTR_IDX_CACHE)) | | |
631 | (ARM_LPAE_MAIR_ATTR_DEVICE | |
632 | << ARM_LPAE_MAIR_ATTR_SHIFT(ARM_LPAE_MAIR_ATTR_IDX_DEV)); | |
633 | ||
634 | cfg->arm_lpae_s1_cfg.mair[0] = reg; | |
635 | cfg->arm_lpae_s1_cfg.mair[1] = 0; | |
636 | ||
637 | /* Looking good; allocate a pgd */ | |
638 | data->pgd = alloc_pages_exact(data->pgd_size, GFP_KERNEL | __GFP_ZERO); | |
639 | if (!data->pgd) | |
640 | goto out_free_data; | |
641 | ||
642 | cfg->tlb->flush_pgtable(data->pgd, data->pgd_size, cookie); | |
643 | ||
644 | /* TTBRs */ | |
645 | cfg->arm_lpae_s1_cfg.ttbr[0] = virt_to_phys(data->pgd); | |
646 | cfg->arm_lpae_s1_cfg.ttbr[1] = 0; | |
647 | return &data->iop; | |
648 | ||
649 | out_free_data: | |
650 | kfree(data); | |
651 | return NULL; | |
652 | } | |
653 | ||
654 | static struct io_pgtable * | |
655 | arm_64_lpae_alloc_pgtable_s2(struct io_pgtable_cfg *cfg, void *cookie) | |
656 | { | |
657 | u64 reg, sl; | |
658 | struct arm_lpae_io_pgtable *data = arm_lpae_alloc_pgtable(cfg); | |
659 | ||
660 | if (!data) | |
661 | return NULL; | |
662 | ||
663 | /* | |
664 | * Concatenate PGDs at level 1 if possible in order to reduce | |
665 | * the depth of the stage-2 walk. | |
666 | */ | |
667 | if (data->levels == ARM_LPAE_MAX_LEVELS) { | |
668 | unsigned long pgd_pages; | |
669 | ||
670 | pgd_pages = data->pgd_size >> ilog2(sizeof(arm_lpae_iopte)); | |
671 | if (pgd_pages <= ARM_LPAE_S2_MAX_CONCAT_PAGES) { | |
672 | data->pgd_size = pgd_pages << data->pg_shift; | |
673 | data->levels--; | |
674 | } | |
675 | } | |
676 | ||
677 | /* VTCR */ | |
678 | reg = ARM_64_LPAE_S2_TCR_RES1 | | |
679 | (ARM_LPAE_TCR_SH_IS << ARM_LPAE_TCR_SH0_SHIFT) | | |
680 | (ARM_LPAE_TCR_RGN_WBWA << ARM_LPAE_TCR_IRGN0_SHIFT) | | |
681 | (ARM_LPAE_TCR_RGN_WBWA << ARM_LPAE_TCR_ORGN0_SHIFT); | |
682 | ||
683 | sl = ARM_LPAE_START_LVL(data); | |
684 | ||
685 | switch (1 << data->pg_shift) { | |
686 | case SZ_4K: | |
687 | reg |= ARM_LPAE_TCR_TG0_4K; | |
688 | sl++; /* SL0 format is different for 4K granule size */ | |
689 | break; | |
690 | case SZ_16K: | |
691 | reg |= ARM_LPAE_TCR_TG0_16K; | |
692 | break; | |
693 | case SZ_64K: | |
694 | reg |= ARM_LPAE_TCR_TG0_64K; | |
695 | break; | |
696 | } | |
697 | ||
698 | switch (cfg->oas) { | |
699 | case 32: | |
700 | reg |= (ARM_LPAE_TCR_PS_32_BIT << ARM_LPAE_TCR_PS_SHIFT); | |
701 | break; | |
702 | case 36: | |
703 | reg |= (ARM_LPAE_TCR_PS_36_BIT << ARM_LPAE_TCR_PS_SHIFT); | |
704 | break; | |
705 | case 40: | |
706 | reg |= (ARM_LPAE_TCR_PS_40_BIT << ARM_LPAE_TCR_PS_SHIFT); | |
707 | break; | |
708 | case 42: | |
709 | reg |= (ARM_LPAE_TCR_PS_42_BIT << ARM_LPAE_TCR_PS_SHIFT); | |
710 | break; | |
711 | case 44: | |
712 | reg |= (ARM_LPAE_TCR_PS_44_BIT << ARM_LPAE_TCR_PS_SHIFT); | |
713 | break; | |
714 | case 48: | |
715 | reg |= (ARM_LPAE_TCR_PS_48_BIT << ARM_LPAE_TCR_PS_SHIFT); | |
716 | break; | |
717 | default: | |
718 | goto out_free_data; | |
719 | } | |
720 | ||
721 | reg |= (64ULL - cfg->ias) << ARM_LPAE_TCR_T0SZ_SHIFT; | |
722 | reg |= (~sl & ARM_LPAE_TCR_SL0_MASK) << ARM_LPAE_TCR_SL0_SHIFT; | |
723 | cfg->arm_lpae_s2_cfg.vtcr = reg; | |
724 | ||
725 | /* Allocate pgd pages */ | |
726 | data->pgd = alloc_pages_exact(data->pgd_size, GFP_KERNEL | __GFP_ZERO); | |
727 | if (!data->pgd) | |
728 | goto out_free_data; | |
729 | ||
730 | cfg->tlb->flush_pgtable(data->pgd, data->pgd_size, cookie); | |
731 | ||
732 | /* VTTBR */ | |
733 | cfg->arm_lpae_s2_cfg.vttbr = virt_to_phys(data->pgd); | |
734 | return &data->iop; | |
735 | ||
736 | out_free_data: | |
737 | kfree(data); | |
738 | return NULL; | |
739 | } | |
740 | ||
741 | static struct io_pgtable * | |
742 | arm_32_lpae_alloc_pgtable_s1(struct io_pgtable_cfg *cfg, void *cookie) | |
743 | { | |
744 | struct io_pgtable *iop; | |
745 | ||
746 | if (cfg->ias > 32 || cfg->oas > 40) | |
747 | return NULL; | |
748 | ||
749 | cfg->pgsize_bitmap &= (SZ_4K | SZ_2M | SZ_1G); | |
750 | iop = arm_64_lpae_alloc_pgtable_s1(cfg, cookie); | |
751 | if (iop) { | |
752 | cfg->arm_lpae_s1_cfg.tcr |= ARM_32_LPAE_TCR_EAE; | |
753 | cfg->arm_lpae_s1_cfg.tcr &= 0xffffffff; | |
754 | } | |
755 | ||
756 | return iop; | |
757 | } | |
758 | ||
759 | static struct io_pgtable * | |
760 | arm_32_lpae_alloc_pgtable_s2(struct io_pgtable_cfg *cfg, void *cookie) | |
761 | { | |
762 | struct io_pgtable *iop; | |
763 | ||
764 | if (cfg->ias > 40 || cfg->oas > 40) | |
765 | return NULL; | |
766 | ||
767 | cfg->pgsize_bitmap &= (SZ_4K | SZ_2M | SZ_1G); | |
768 | iop = arm_64_lpae_alloc_pgtable_s2(cfg, cookie); | |
769 | if (iop) | |
770 | cfg->arm_lpae_s2_cfg.vtcr &= 0xffffffff; | |
771 | ||
772 | return iop; | |
773 | } | |
774 | ||
775 | struct io_pgtable_init_fns io_pgtable_arm_64_lpae_s1_init_fns = { | |
776 | .alloc = arm_64_lpae_alloc_pgtable_s1, | |
777 | .free = arm_lpae_free_pgtable, | |
778 | }; | |
779 | ||
780 | struct io_pgtable_init_fns io_pgtable_arm_64_lpae_s2_init_fns = { | |
781 | .alloc = arm_64_lpae_alloc_pgtable_s2, | |
782 | .free = arm_lpae_free_pgtable, | |
783 | }; | |
784 | ||
785 | struct io_pgtable_init_fns io_pgtable_arm_32_lpae_s1_init_fns = { | |
786 | .alloc = arm_32_lpae_alloc_pgtable_s1, | |
787 | .free = arm_lpae_free_pgtable, | |
788 | }; | |
789 | ||
790 | struct io_pgtable_init_fns io_pgtable_arm_32_lpae_s2_init_fns = { | |
791 | .alloc = arm_32_lpae_alloc_pgtable_s2, | |
792 | .free = arm_lpae_free_pgtable, | |
793 | }; | |
fe4b991d WD |
794 | |
795 | #ifdef CONFIG_IOMMU_IO_PGTABLE_LPAE_SELFTEST | |
796 | ||
797 | static struct io_pgtable_cfg *cfg_cookie; | |
798 | ||
799 | static void dummy_tlb_flush_all(void *cookie) | |
800 | { | |
801 | WARN_ON(cookie != cfg_cookie); | |
802 | } | |
803 | ||
804 | static void dummy_tlb_add_flush(unsigned long iova, size_t size, bool leaf, | |
805 | void *cookie) | |
806 | { | |
807 | WARN_ON(cookie != cfg_cookie); | |
808 | WARN_ON(!(size & cfg_cookie->pgsize_bitmap)); | |
809 | } | |
810 | ||
811 | static void dummy_tlb_sync(void *cookie) | |
812 | { | |
813 | WARN_ON(cookie != cfg_cookie); | |
814 | } | |
815 | ||
816 | static void dummy_flush_pgtable(void *ptr, size_t size, void *cookie) | |
817 | { | |
818 | WARN_ON(cookie != cfg_cookie); | |
819 | } | |
820 | ||
821 | static struct iommu_gather_ops dummy_tlb_ops __initdata = { | |
822 | .tlb_flush_all = dummy_tlb_flush_all, | |
823 | .tlb_add_flush = dummy_tlb_add_flush, | |
824 | .tlb_sync = dummy_tlb_sync, | |
825 | .flush_pgtable = dummy_flush_pgtable, | |
826 | }; | |
827 | ||
828 | static void __init arm_lpae_dump_ops(struct io_pgtable_ops *ops) | |
829 | { | |
830 | struct arm_lpae_io_pgtable *data = io_pgtable_ops_to_data(ops); | |
831 | struct io_pgtable_cfg *cfg = &data->iop.cfg; | |
832 | ||
833 | pr_err("cfg: pgsize_bitmap 0x%lx, ias %u-bit\n", | |
834 | cfg->pgsize_bitmap, cfg->ias); | |
835 | pr_err("data: %d levels, 0x%zx pgd_size, %lu pg_shift, %lu bits_per_level, pgd @ %p\n", | |
836 | data->levels, data->pgd_size, data->pg_shift, | |
837 | data->bits_per_level, data->pgd); | |
838 | } | |
839 | ||
840 | #define __FAIL(ops, i) ({ \ | |
841 | WARN(1, "selftest: test failed for fmt idx %d\n", (i)); \ | |
842 | arm_lpae_dump_ops(ops); \ | |
843 | selftest_running = false; \ | |
844 | -EFAULT; \ | |
845 | }) | |
846 | ||
847 | static int __init arm_lpae_run_tests(struct io_pgtable_cfg *cfg) | |
848 | { | |
849 | static const enum io_pgtable_fmt fmts[] = { | |
850 | ARM_64_LPAE_S1, | |
851 | ARM_64_LPAE_S2, | |
852 | }; | |
853 | ||
854 | int i, j; | |
855 | unsigned long iova; | |
856 | size_t size; | |
857 | struct io_pgtable_ops *ops; | |
858 | ||
859 | selftest_running = true; | |
860 | ||
861 | for (i = 0; i < ARRAY_SIZE(fmts); ++i) { | |
862 | cfg_cookie = cfg; | |
863 | ops = alloc_io_pgtable_ops(fmts[i], cfg, cfg); | |
864 | if (!ops) { | |
865 | pr_err("selftest: failed to allocate io pgtable ops\n"); | |
866 | return -ENOMEM; | |
867 | } | |
868 | ||
869 | /* | |
870 | * Initial sanity checks. | |
871 | * Empty page tables shouldn't provide any translations. | |
872 | */ | |
873 | if (ops->iova_to_phys(ops, 42)) | |
874 | return __FAIL(ops, i); | |
875 | ||
876 | if (ops->iova_to_phys(ops, SZ_1G + 42)) | |
877 | return __FAIL(ops, i); | |
878 | ||
879 | if (ops->iova_to_phys(ops, SZ_2G + 42)) | |
880 | return __FAIL(ops, i); | |
881 | ||
882 | /* | |
883 | * Distinct mappings of different granule sizes. | |
884 | */ | |
885 | iova = 0; | |
886 | j = find_first_bit(&cfg->pgsize_bitmap, BITS_PER_LONG); | |
887 | while (j != BITS_PER_LONG) { | |
888 | size = 1UL << j; | |
889 | ||
890 | if (ops->map(ops, iova, iova, size, IOMMU_READ | | |
891 | IOMMU_WRITE | | |
892 | IOMMU_NOEXEC | | |
893 | IOMMU_CACHE)) | |
894 | return __FAIL(ops, i); | |
895 | ||
896 | /* Overlapping mappings */ | |
897 | if (!ops->map(ops, iova, iova + size, size, | |
898 | IOMMU_READ | IOMMU_NOEXEC)) | |
899 | return __FAIL(ops, i); | |
900 | ||
901 | if (ops->iova_to_phys(ops, iova + 42) != (iova + 42)) | |
902 | return __FAIL(ops, i); | |
903 | ||
904 | iova += SZ_1G; | |
905 | j++; | |
906 | j = find_next_bit(&cfg->pgsize_bitmap, BITS_PER_LONG, j); | |
907 | } | |
908 | ||
909 | /* Partial unmap */ | |
910 | size = 1UL << __ffs(cfg->pgsize_bitmap); | |
911 | if (ops->unmap(ops, SZ_1G + size, size) != size) | |
912 | return __FAIL(ops, i); | |
913 | ||
914 | /* Remap of partial unmap */ | |
915 | if (ops->map(ops, SZ_1G + size, size, size, IOMMU_READ)) | |
916 | return __FAIL(ops, i); | |
917 | ||
918 | if (ops->iova_to_phys(ops, SZ_1G + size + 42) != (size + 42)) | |
919 | return __FAIL(ops, i); | |
920 | ||
921 | /* Full unmap */ | |
922 | iova = 0; | |
923 | j = find_first_bit(&cfg->pgsize_bitmap, BITS_PER_LONG); | |
924 | while (j != BITS_PER_LONG) { | |
925 | size = 1UL << j; | |
926 | ||
927 | if (ops->unmap(ops, iova, size) != size) | |
928 | return __FAIL(ops, i); | |
929 | ||
930 | if (ops->iova_to_phys(ops, iova + 42)) | |
931 | return __FAIL(ops, i); | |
932 | ||
933 | /* Remap full block */ | |
934 | if (ops->map(ops, iova, iova, size, IOMMU_WRITE)) | |
935 | return __FAIL(ops, i); | |
936 | ||
937 | if (ops->iova_to_phys(ops, iova + 42) != (iova + 42)) | |
938 | return __FAIL(ops, i); | |
939 | ||
940 | iova += SZ_1G; | |
941 | j++; | |
942 | j = find_next_bit(&cfg->pgsize_bitmap, BITS_PER_LONG, j); | |
943 | } | |
944 | ||
945 | free_io_pgtable_ops(ops); | |
946 | } | |
947 | ||
948 | selftest_running = false; | |
949 | return 0; | |
950 | } | |
951 | ||
952 | static int __init arm_lpae_do_selftests(void) | |
953 | { | |
954 | static const unsigned long pgsize[] = { | |
955 | SZ_4K | SZ_2M | SZ_1G, | |
956 | SZ_16K | SZ_32M, | |
957 | SZ_64K | SZ_512M, | |
958 | }; | |
959 | ||
960 | static const unsigned int ias[] = { | |
961 | 32, 36, 40, 42, 44, 48, | |
962 | }; | |
963 | ||
964 | int i, j, pass = 0, fail = 0; | |
965 | struct io_pgtable_cfg cfg = { | |
966 | .tlb = &dummy_tlb_ops, | |
967 | .oas = 48, | |
968 | }; | |
969 | ||
970 | for (i = 0; i < ARRAY_SIZE(pgsize); ++i) { | |
971 | for (j = 0; j < ARRAY_SIZE(ias); ++j) { | |
972 | cfg.pgsize_bitmap = pgsize[i]; | |
973 | cfg.ias = ias[j]; | |
974 | pr_info("selftest: pgsize_bitmap 0x%08lx, IAS %u\n", | |
975 | pgsize[i], ias[j]); | |
976 | if (arm_lpae_run_tests(&cfg)) | |
977 | fail++; | |
978 | else | |
979 | pass++; | |
980 | } | |
981 | } | |
982 | ||
983 | pr_info("selftest: completed with %d PASS %d FAIL\n", pass, fail); | |
984 | return fail ? -EFAULT : 0; | |
985 | } | |
986 | subsys_initcall(arm_lpae_do_selftests); | |
987 | #endif |