mmu.h (7720B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_POWERPC_BOOK3S_64_MMU_H_ 3#define _ASM_POWERPC_BOOK3S_64_MMU_H_ 4 5#include <asm/page.h> 6 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 */ 17struct 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 */ 22 unsigned long h_rpt_pgsize; /* H_RPT_INVALIDATE page size encoding */ 23 union { 24 unsigned long sllp; /* SLB L||LP (exact mask to use in slbmte) */ 25 unsigned long ap; /* Ap encoding used by PowerISA 3.0 */ 26 }; 27}; 28extern struct mmu_psize_def mmu_psize_defs[MMU_PAGE_COUNT]; 29#endif /* __ASSEMBLY__ */ 30 31/* 64-bit classic hash table MMU */ 32#include <asm/book3s/64/mmu-hash.h> 33 34#ifndef __ASSEMBLY__ 35/* 36 * ISA 3.0 partition and process table entry format 37 */ 38struct prtb_entry { 39 __be64 prtb0; 40 __be64 prtb1; 41}; 42extern struct prtb_entry *process_tb; 43 44struct patb_entry { 45 __be64 patb0; 46 __be64 patb1; 47}; 48extern struct patb_entry *partition_tb; 49 50/* Bits in patb0 field */ 51#define PATB_HR (1UL << 63) 52#define RPDB_MASK 0x0fffffffffffff00UL 53#define RPDB_SHIFT (1UL << 8) 54#define RTS1_SHIFT 61 /* top 2 bits of radix tree size */ 55#define RTS1_MASK (3UL << RTS1_SHIFT) 56#define RTS2_SHIFT 5 /* bottom 3 bits of radix tree size */ 57#define RTS2_MASK (7UL << RTS2_SHIFT) 58#define RPDS_MASK 0x1f /* root page dir. size field */ 59 60/* Bits in patb1 field */ 61#define PATB_GR (1UL << 63) /* guest uses radix; must match HR */ 62#define PRTS_MASK 0x1f /* process table size field */ 63#define PRTB_MASK 0x0ffffffffffff000UL 64 65/* Number of supported LPID bits */ 66extern unsigned int mmu_lpid_bits; 67 68/* Number of supported PID bits */ 69extern unsigned int mmu_pid_bits; 70 71/* Base PID to allocate from */ 72extern unsigned int mmu_base_pid; 73 74/* 75 * memory block size used with radix translation. 76 */ 77extern unsigned long __ro_after_init radix_mem_block_size; 78 79#define PRTB_SIZE_SHIFT (mmu_pid_bits + 4) 80#define PRTB_ENTRIES (1ul << mmu_pid_bits) 81 82#define PATB_SIZE_SHIFT (mmu_lpid_bits + 4) 83#define PATB_ENTRIES (1ul << mmu_lpid_bits) 84 85typedef unsigned long mm_context_id_t; 86struct spinlock; 87 88/* Maximum possible number of NPUs in a system. */ 89#define NV_MAX_NPUS 8 90 91typedef struct { 92 union { 93 /* 94 * We use id as the PIDR content for radix. On hash we can use 95 * more than one id. The extended ids are used when we start 96 * having address above 512TB. We allocate one extended id 97 * for each 512TB. The new id is then used with the 49 bit 98 * EA to build a new VA. We always use ESID_BITS_1T_MASK bits 99 * from EA and new context ids to build the new VAs. 100 */ 101 mm_context_id_t id; 102#ifdef CONFIG_PPC_64S_HASH_MMU 103 mm_context_id_t extended_id[TASK_SIZE_USER64/TASK_CONTEXT_SIZE]; 104#endif 105 }; 106 107 /* Number of bits in the mm_cpumask */ 108 atomic_t active_cpus; 109 110 /* Number of users of the external (Nest) MMU */ 111 atomic_t copros; 112 113 /* Number of user space windows opened in process mm_context */ 114 atomic_t vas_windows; 115 116#ifdef CONFIG_PPC_64S_HASH_MMU 117 struct hash_mm_context *hash_context; 118#endif 119 120 void __user *vdso; 121 /* 122 * pagetable fragment support 123 */ 124 void *pte_frag; 125 void *pmd_frag; 126#ifdef CONFIG_SPAPR_TCE_IOMMU 127 struct list_head iommu_group_mem_list; 128#endif 129 130#ifdef CONFIG_PPC_MEM_KEYS 131 /* 132 * Each bit represents one protection key. 133 * bit set -> key allocated 134 * bit unset -> key available for allocation 135 */ 136 u32 pkey_allocation_map; 137 s16 execute_only_pkey; /* key holding execute-only protection */ 138#endif 139} mm_context_t; 140 141#ifdef CONFIG_PPC_64S_HASH_MMU 142static inline u16 mm_ctx_user_psize(mm_context_t *ctx) 143{ 144 return ctx->hash_context->user_psize; 145} 146 147static inline void mm_ctx_set_user_psize(mm_context_t *ctx, u16 user_psize) 148{ 149 ctx->hash_context->user_psize = user_psize; 150} 151 152static inline unsigned char *mm_ctx_low_slices(mm_context_t *ctx) 153{ 154 return ctx->hash_context->low_slices_psize; 155} 156 157static inline unsigned char *mm_ctx_high_slices(mm_context_t *ctx) 158{ 159 return ctx->hash_context->high_slices_psize; 160} 161 162static inline unsigned long mm_ctx_slb_addr_limit(mm_context_t *ctx) 163{ 164 return ctx->hash_context->slb_addr_limit; 165} 166 167static inline void mm_ctx_set_slb_addr_limit(mm_context_t *ctx, unsigned long limit) 168{ 169 ctx->hash_context->slb_addr_limit = limit; 170} 171 172static inline struct slice_mask *slice_mask_for_size(mm_context_t *ctx, int psize) 173{ 174#ifdef CONFIG_PPC_64K_PAGES 175 if (psize == MMU_PAGE_64K) 176 return &ctx->hash_context->mask_64k; 177#endif 178#ifdef CONFIG_HUGETLB_PAGE 179 if (psize == MMU_PAGE_16M) 180 return &ctx->hash_context->mask_16m; 181 if (psize == MMU_PAGE_16G) 182 return &ctx->hash_context->mask_16g; 183#endif 184 BUG_ON(psize != MMU_PAGE_4K); 185 186 return &ctx->hash_context->mask_4k; 187} 188 189#ifdef CONFIG_PPC_SUBPAGE_PROT 190static inline struct subpage_prot_table *mm_ctx_subpage_prot(mm_context_t *ctx) 191{ 192 return ctx->hash_context->spt; 193} 194#endif 195 196/* 197 * The current system page and segment sizes 198 */ 199extern int mmu_virtual_psize; 200extern int mmu_vmalloc_psize; 201extern int mmu_io_psize; 202#else /* CONFIG_PPC_64S_HASH_MMU */ 203#ifdef CONFIG_PPC_64K_PAGES 204#define mmu_virtual_psize MMU_PAGE_64K 205#else 206#define mmu_virtual_psize MMU_PAGE_4K 207#endif 208#endif 209extern int mmu_linear_psize; 210extern int mmu_vmemmap_psize; 211 212/* MMU initialization */ 213void mmu_early_init_devtree(void); 214void hash__early_init_devtree(void); 215void radix__early_init_devtree(void); 216#ifdef CONFIG_PPC_PKEY 217void pkey_early_init_devtree(void); 218#else 219static inline void pkey_early_init_devtree(void) {} 220#endif 221 222extern void hash__early_init_mmu(void); 223extern void radix__early_init_mmu(void); 224static inline void __init early_init_mmu(void) 225{ 226 if (radix_enabled()) 227 return radix__early_init_mmu(); 228 return hash__early_init_mmu(); 229} 230extern void hash__early_init_mmu_secondary(void); 231extern void radix__early_init_mmu_secondary(void); 232static inline void early_init_mmu_secondary(void) 233{ 234 if (radix_enabled()) 235 return radix__early_init_mmu_secondary(); 236 return hash__early_init_mmu_secondary(); 237} 238 239extern void hash__setup_initial_memory_limit(phys_addr_t first_memblock_base, 240 phys_addr_t first_memblock_size); 241static inline void setup_initial_memory_limit(phys_addr_t first_memblock_base, 242 phys_addr_t first_memblock_size) 243{ 244 /* 245 * Hash has more strict restrictions. At this point we don't 246 * know which translations we will pick. Hence go with hash 247 * restrictions. 248 */ 249 if (!early_radix_enabled()) 250 hash__setup_initial_memory_limit(first_memblock_base, 251 first_memblock_size); 252} 253 254#ifdef CONFIG_PPC_PSERIES 255void __init radix_init_pseries(void); 256#else 257static inline void radix_init_pseries(void) { } 258#endif 259 260#ifdef CONFIG_HOTPLUG_CPU 261#define arch_clear_mm_cpumask_cpu(cpu, mm) \ 262 do { \ 263 if (cpumask_test_cpu(cpu, mm_cpumask(mm))) { \ 264 atomic_dec(&(mm)->context.active_cpus); \ 265 cpumask_clear_cpu(cpu, mm_cpumask(mm)); \ 266 } \ 267 } while (0) 268 269void cleanup_cpu_mmu_context(void); 270#endif 271 272#ifdef CONFIG_PPC_64S_HASH_MMU 273static inline int get_user_context(mm_context_t *ctx, unsigned long ea) 274{ 275 int index = ea >> MAX_EA_BITS_PER_CONTEXT; 276 277 if (likely(index < ARRAY_SIZE(ctx->extended_id))) 278 return ctx->extended_id[index]; 279 280 /* should never happen */ 281 WARN_ON(1); 282 return 0; 283} 284 285static inline unsigned long get_user_vsid(mm_context_t *ctx, 286 unsigned long ea, int ssize) 287{ 288 unsigned long context = get_user_context(ctx, ea); 289 290 return get_vsid(context, ea, ssize); 291} 292#endif 293 294#endif /* __ASSEMBLY__ */ 295#endif /* _ASM_POWERPC_BOOK3S_64_MMU_H_ */