1 /* SPDX-License-Identifier: BSD-2-Clause */ 2 /* 3 * Copyright (c) 2016, Linaro Limited 4 */ 5 #ifndef MM_PGT_CACHE_H 6 #define MM_PGT_CACHE_H 7 8 #ifdef CFG_WITH_LPAE 9 #define PGT_SIZE (4 * 1024) 10 #define PGT_NUM_PGT_PER_PAGE 1 11 #else 12 #define PGT_SIZE (1 * 1024) 13 #define PGT_NUM_PGT_PER_PAGE 4 14 #endif 15 16 #include <assert.h> 17 #include <kernel/tee_ta_manager.h> 18 #include <sys/queue.h> 19 #include <types_ext.h> 20 #include <util.h> 21 22 struct ts_ctx; 23 24 struct pgt { 25 void *tbl; 26 vaddr_t vabase; 27 #if defined(CFG_PAGED_USER_TA) 28 struct ts_ctx *ctx; 29 size_t num_used_entries; 30 #endif 31 #if defined(CFG_WITH_PAGER) 32 #if !defined(CFG_WITH_LPAE) 33 struct pgt_parent *parent; 34 #endif 35 #endif 36 SLIST_ENTRY(pgt) link; 37 }; 38 39 /* 40 * A proper value for PGT_CACHE_SIZE depends on many factors: CFG_WITH_LPAE, 41 * CFG_TA_ASLR, size of TA, size of memrefs passed to TA, CFG_ULIBS_SHARED and 42 * possibly others. The value is based on the number of threads as an indicator 43 * on how large the system might be. 44 */ 45 #if CFG_NUM_THREADS < 2 46 #define PGT_CACHE_SIZE 4 47 #elif (CFG_NUM_THREADS == 2 && !defined(CFG_WITH_LPAE)) 48 #define PGT_CACHE_SIZE 8 49 #else 50 #define PGT_CACHE_SIZE ROUNDUP(CFG_NUM_THREADS * 2, PGT_NUM_PGT_PER_PAGE) 51 #endif 52 53 SLIST_HEAD(pgt_cache, pgt); 54 55 bool pgt_check_avail(struct vm_info *vm_info); 56 57 void pgt_alloc(struct pgt_cache *pgt_cache, struct ts_ctx *owning_ctx, 58 struct vm_info *vm_info); 59 void pgt_free(struct pgt_cache *pgt_cache, bool save_ctx); 60 61 void pgt_clear_ctx_range(struct pgt_cache *pgt_cache, struct ts_ctx *ctx, 62 vaddr_t begin, vaddr_t end); 63 #ifdef CFG_PAGED_USER_TA 64 void pgt_flush_ctx_range(struct pgt_cache *pgt_cache, struct ts_ctx *ctx, 65 vaddr_t begin, vaddr_t last); 66 #else 67 static inline void pgt_flush_ctx_range(struct pgt_cache *pgt_cache __unused, 68 struct ts_ctx *ctx __unused, 69 vaddr_t begin __unused, 70 vaddr_t last __unused) 71 { 72 } 73 #endif 74 75 void pgt_init(void); 76 77 #if defined(CFG_PAGED_USER_TA) 78 void pgt_flush_ctx(struct ts_ctx *ctx); 79 80 static inline void pgt_inc_used_entries(struct pgt *pgt) 81 { 82 pgt->num_used_entries++; 83 assert(pgt->num_used_entries); 84 } 85 86 static inline void pgt_dec_used_entries(struct pgt *pgt) 87 { 88 assert(pgt->num_used_entries); 89 pgt->num_used_entries--; 90 } 91 92 static inline void pgt_set_used_entries(struct pgt *pgt, size_t val) 93 { 94 pgt->num_used_entries = val; 95 } 96 97 #else 98 static inline void pgt_flush_ctx(struct ts_ctx *ctx __unused) 99 { 100 } 101 102 static inline void pgt_inc_used_entries(struct pgt *pgt __unused) 103 { 104 } 105 106 static inline void pgt_dec_used_entries(struct pgt *pgt __unused) 107 { 108 } 109 110 static inline void pgt_set_used_entries(struct pgt *pgt __unused, 111 size_t val __unused) 112 { 113 } 114 115 #endif 116 117 #endif /*MM_PGT_CACHE_H*/ 118