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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
11a6f6ab AK |
2 | #ifndef _ASM_POWERPC_BOOK3S_64_MMU_H_ |
3 | #define _ASM_POWERPC_BOOK3S_64_MMU_H_ | |
4 | ||
d09780f3 CL |
5 | #include <asm/page.h> |
6 | ||
11a6f6ab AK |
7 | #ifndef __ASSEMBLY__ |
8 | /* | |
9 | * Page size definition | |
10 | * | |
11 | * shift : is the "PAGE_SHIFT" value for that page size | |
12 | * sllp : is a bit mask with the value of SLB L || LP to be or'ed | |
13 | * directly to a slbmte "vsid" value | |
14 | * penc : is the HPTE encoding mask for the "LP" field: | |
15 | * | |
16 | */ | |
17 | struct mmu_psize_def { | |
18 | unsigned int shift; /* number of bits */ | |
19 | int penc[MMU_PAGE_COUNT]; /* HPTE encoding */ | |
20 | unsigned int tlbiel; /* tlbiel supported for that page size */ | |
21 | unsigned long avpnm; /* bits to mask out in AVPN in the HPTE */ | |
2bfd65e4 AK |
22 | union { |
23 | unsigned long sllp; /* SLB L||LP (exact mask to use in slbmte) */ | |
24 | unsigned long ap; /* Ap encoding used by PowerISA 3.0 */ | |
25 | }; | |
11a6f6ab AK |
26 | }; |
27 | extern struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT]; | |
28 | #endif /* __ASSEMBLY__ */ | |
29 | ||
6161a373 AK |
30 | /* |
31 | * If we store section details in page->flags we can't increase the MAX_PHYSMEM_BITS | |
32 | * if we increase SECTIONS_WIDTH we will not store node details in page->flags and | |
33 | * page_to_nid does a page->section->node lookup | |
34 | * Hence only increase for VMEMMAP. Further depending on SPARSEMEM_EXTREME reduce | |
35 | * memory requirements with large number of sections. | |
36 | * 51 bits is the max physical real address on POWER9 | |
37 | */ | |
38 | #if defined(CONFIG_SPARSEMEM_VMEMMAP) && defined(CONFIG_SPARSEMEM_EXTREME) && \ | |
39 | defined(CONFIG_PPC_64K_PAGES) | |
40 | #define MAX_PHYSMEM_BITS 51 | |
41 | #else | |
42 | #define MAX_PHYSMEM_BITS 46 | |
43 | #endif | |
44 | ||
11a6f6ab AK |
45 | /* 64-bit classic hash table MMU */ |
46 | #include <asm/book3s/64/mmu-hash.h> | |
11a6f6ab AK |
47 | |
48 | #ifndef __ASSEMBLY__ | |
e9983344 | 49 | /* |
8ab102d6 | 50 | * ISA 3.0 partition and process table entry format |
e9983344 AK |
51 | */ |
52 | struct prtb_entry { | |
53 | __be64 prtb0; | |
54 | __be64 prtb1; | |
55 | }; | |
56 | extern struct prtb_entry *process_tb; | |
57 | ||
58 | struct patb_entry { | |
59 | __be64 patb0; | |
60 | __be64 patb1; | |
61 | }; | |
62 | extern struct patb_entry *partition_tb; | |
63 | ||
dbcbfee0 | 64 | /* Bits in patb0 field */ |
e9983344 | 65 | #define PATB_HR (1UL << 63) |
70cd4c10 | 66 | #define RPDB_MASK 0x0fffffffffffff00UL |
e9983344 | 67 | #define RPDB_SHIFT (1UL << 8) |
dbcbfee0 PM |
68 | #define RTS1_SHIFT 61 /* top 2 bits of radix tree size */ |
69 | #define RTS1_MASK (3UL << RTS1_SHIFT) | |
70 | #define RTS2_SHIFT 5 /* bottom 3 bits of radix tree size */ | |
71 | #define RTS2_MASK (7UL << RTS2_SHIFT) | |
72 | #define RPDS_MASK 0x1f /* root page dir. size field */ | |
73 | ||
74 | /* Bits in patb1 field */ | |
75 | #define PATB_GR (1UL << 63) /* guest uses radix; must match HR */ | |
76 | #define PRTS_MASK 0x1f /* process table size field */ | |
70cd4c10 | 77 | #define PRTB_MASK 0x0ffffffffffff000UL |
dbcbfee0 | 78 | |
a25bd72b BH |
79 | /* Number of supported PID bits */ |
80 | extern unsigned int mmu_pid_bits; | |
81 | ||
82 | /* Base PID to allocate from */ | |
83 | extern unsigned int mmu_base_pid; | |
84 | ||
85 | #define PRTB_SIZE_SHIFT (mmu_pid_bits + 4) | |
86 | #define PRTB_ENTRIES (1ul << mmu_pid_bits) | |
760573c1 | 87 | |
e9983344 AK |
88 | /* |
89 | * Power9 currently only support 64K partition table size. | |
90 | */ | |
91 | #define PATB_SIZE_SHIFT 16 | |
11a6f6ab AK |
92 | |
93 | typedef unsigned long mm_context_id_t; | |
94 | struct spinlock; | |
95 | ||
1ab66d1f AP |
96 | /* Maximum possible number of NPUs in a system. */ |
97 | #define NV_MAX_NPUS 8 | |
98 | ||
11a6f6ab | 99 | typedef struct { |
f384796c AK |
100 | union { |
101 | /* | |
102 | * We use id as the PIDR content for radix. On hash we can use | |
103 | * more than one id. The extended ids are used when we start | |
104 | * having address above 512TB. We allocate one extended id | |
105 | * for each 512TB. The new id is then used with the 49 bit | |
106 | * EA to build a new VA. We always use ESID_BITS_1T_MASK bits | |
107 | * from EA and new context ids to build the new VAs. | |
108 | */ | |
109 | mm_context_id_t id; | |
110 | mm_context_id_t extended_id[TASK_SIZE_USER64/TASK_CONTEXT_SIZE]; | |
111 | }; | |
11a6f6ab | 112 | |
a619e59c BH |
113 | /* Number of bits in the mm_cpumask */ |
114 | atomic_t active_cpus; | |
115 | ||
aff6f8cb BH |
116 | /* Number of users of the external (Nest) MMU */ |
117 | atomic_t copros; | |
118 | ||
c420644c HM |
119 | /* Number of user space windows opened in process mm_context */ |
120 | atomic_t vas_windows; | |
121 | ||
70110186 | 122 | struct hash_mm_context *hash_context; |
1ab66d1f | 123 | |
11a6f6ab | 124 | unsigned long vdso_base; |
1c7ec8a4 AK |
125 | /* |
126 | * pagetable fragment support | |
127 | */ | |
11a6f6ab | 128 | void *pte_frag; |
8a6c697b | 129 | void *pmd_frag; |
11a6f6ab AK |
130 | #ifdef CONFIG_SPAPR_TCE_IOMMU |
131 | struct list_head iommu_group_mem_list; | |
132 | #endif | |
4fb158f6 RP |
133 | |
134 | #ifdef CONFIG_PPC_MEM_KEYS | |
135 | /* | |
136 | * Each bit represents one protection key. | |
137 | * bit set -> key allocated | |
138 | * bit unset -> key available for allocation | |
139 | */ | |
140 | u32 pkey_allocation_map; | |
5586cf61 | 141 | s16 execute_only_pkey; /* key holding execute-only protection */ |
4fb158f6 | 142 | #endif |
11a6f6ab AK |
143 | } mm_context_t; |
144 | ||
60458fba AK |
145 | static inline u16 mm_ctx_user_psize(mm_context_t *ctx) |
146 | { | |
70110186 | 147 | return ctx->hash_context->user_psize; |
60458fba AK |
148 | } |
149 | ||
150 | static inline void mm_ctx_set_user_psize(mm_context_t *ctx, u16 user_psize) | |
151 | { | |
70110186 | 152 | ctx->hash_context->user_psize = user_psize; |
60458fba AK |
153 | } |
154 | ||
155 | static inline unsigned char *mm_ctx_low_slices(mm_context_t *ctx) | |
156 | { | |
70110186 | 157 | return ctx->hash_context->low_slices_psize; |
60458fba AK |
158 | } |
159 | ||
160 | static inline unsigned char *mm_ctx_high_slices(mm_context_t *ctx) | |
161 | { | |
70110186 | 162 | return ctx->hash_context->high_slices_psize; |
60458fba AK |
163 | } |
164 | ||
165 | static inline unsigned long mm_ctx_slb_addr_limit(mm_context_t *ctx) | |
166 | { | |
70110186 | 167 | return ctx->hash_context->slb_addr_limit; |
60458fba AK |
168 | } |
169 | ||
170 | static inline void mm_ctx_set_slb_addr_limit(mm_context_t *ctx, unsigned long limit) | |
171 | { | |
70110186 | 172 | ctx->hash_context->slb_addr_limit = limit; |
60458fba AK |
173 | } |
174 | ||
fca5c1e9 CL |
175 | static inline struct slice_mask *slice_mask_for_size(mm_context_t *ctx, int psize) |
176 | { | |
177 | #ifdef CONFIG_PPC_64K_PAGES | |
178 | if (psize == MMU_PAGE_64K) | |
87746121 | 179 | return &ctx->hash_context->mask_64k; |
fca5c1e9 CL |
180 | #endif |
181 | #ifdef CONFIG_HUGETLB_PAGE | |
182 | if (psize == MMU_PAGE_16M) | |
87746121 | 183 | return &ctx->hash_context->mask_16m; |
fca5c1e9 | 184 | if (psize == MMU_PAGE_16G) |
87746121 | 185 | return &ctx->hash_context->mask_16g; |
fca5c1e9 CL |
186 | #endif |
187 | BUG_ON(psize != MMU_PAGE_4K); | |
188 | ||
87746121 | 189 | return &ctx->hash_context->mask_4k; |
fca5c1e9 CL |
190 | } |
191 | ||
60458fba AK |
192 | #ifdef CONFIG_PPC_SUBPAGE_PROT |
193 | static inline struct subpage_prot_table *mm_ctx_subpage_prot(mm_context_t *ctx) | |
194 | { | |
ef629cc5 | 195 | return ctx->hash_context->spt; |
60458fba AK |
196 | } |
197 | #endif | |
198 | ||
11a6f6ab AK |
199 | /* |
200 | * The current system page and segment sizes | |
201 | */ | |
202 | extern int mmu_linear_psize; | |
203 | extern int mmu_virtual_psize; | |
204 | extern int mmu_vmalloc_psize; | |
205 | extern int mmu_vmemmap_psize; | |
206 | extern int mmu_io_psize; | |
207 | ||
756d08d1 | 208 | /* MMU initialization */ |
1a01dc87 | 209 | void mmu_early_init_devtree(void); |
bacf9cf8 | 210 | void hash__early_init_devtree(void); |
2537b09c | 211 | void radix__early_init_devtree(void); |
756d08d1 | 212 | extern void hash__early_init_mmu(void); |
2bfd65e4 | 213 | extern void radix__early_init_mmu(void); |
9384e552 | 214 | static inline void __init early_init_mmu(void) |
756d08d1 | 215 | { |
2bfd65e4 AK |
216 | if (radix_enabled()) |
217 | return radix__early_init_mmu(); | |
756d08d1 AK |
218 | return hash__early_init_mmu(); |
219 | } | |
220 | extern void hash__early_init_mmu_secondary(void); | |
2bfd65e4 | 221 | extern void radix__early_init_mmu_secondary(void); |
756d08d1 AK |
222 | static inline void early_init_mmu_secondary(void) |
223 | { | |
2bfd65e4 AK |
224 | if (radix_enabled()) |
225 | return radix__early_init_mmu_secondary(); | |
756d08d1 AK |
226 | return hash__early_init_mmu_secondary(); |
227 | } | |
228 | ||
229 | extern void hash__setup_initial_memory_limit(phys_addr_t first_memblock_base, | |
230 | phys_addr_t first_memblock_size); | |
2bfd65e4 AK |
231 | extern void radix__setup_initial_memory_limit(phys_addr_t first_memblock_base, |
232 | phys_addr_t first_memblock_size); | |
756d08d1 AK |
233 | static inline void setup_initial_memory_limit(phys_addr_t first_memblock_base, |
234 | phys_addr_t first_memblock_size) | |
235 | { | |
b8f1b4f8 | 236 | if (early_radix_enabled()) |
2bfd65e4 AK |
237 | return radix__setup_initial_memory_limit(first_memblock_base, |
238 | first_memblock_size); | |
756d08d1 AK |
239 | return hash__setup_initial_memory_limit(first_memblock_base, |
240 | first_memblock_size); | |
241 | } | |
eea8148c | 242 | |
cc3d2940 PM |
243 | #ifdef CONFIG_PPC_PSERIES |
244 | extern void radix_init_pseries(void); | |
245 | #else | |
246 | static inline void radix_init_pseries(void) { }; | |
247 | #endif | |
248 | ||
c9f80734 | 249 | static inline int get_user_context(mm_context_t *ctx, unsigned long ea) |
f384796c AK |
250 | { |
251 | int index = ea >> MAX_EA_BITS_PER_CONTEXT; | |
252 | ||
253 | if (likely(index < ARRAY_SIZE(ctx->extended_id))) | |
254 | return ctx->extended_id[index]; | |
255 | ||
256 | /* should never happen */ | |
257 | WARN_ON(1); | |
258 | return 0; | |
259 | } | |
260 | ||
261 | static inline unsigned long get_user_vsid(mm_context_t *ctx, | |
262 | unsigned long ea, int ssize) | |
263 | { | |
c9f80734 | 264 | unsigned long context = get_user_context(ctx, ea); |
f384796c AK |
265 | |
266 | return get_vsid(context, ea, ssize); | |
267 | } | |
268 | ||
11a6f6ab AK |
269 | #endif /* __ASSEMBLY__ */ |
270 | #endif /* _ASM_POWERPC_BOOK3S_64_MMU_H_ */ |