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_CORE_PREALLOC_EL0_TBLS) 28 struct ts_ctx *ctx; 29 #endif 30 bool populated; 31 #if defined(CFG_PAGED_USER_TA) 32 uint16_t num_used_entries; 33 #endif 34 #if defined(CFG_CORE_PREALLOC_EL0_TBLS) || \ 35 (defined(CFG_WITH_PAGER) && !defined(CFG_WITH_LPAE)) 36 struct pgt_parent *parent; 37 #endif 38 SLIST_ENTRY(pgt) link; 39 }; 40 41 /* 42 * A proper value for PGT_CACHE_SIZE depends on many factors: CFG_WITH_LPAE, 43 * CFG_TA_ASLR, size of TA, size of memrefs passed to TA, CFG_ULIBS_SHARED and 44 * possibly others. The value is based on the number of threads as an indicator 45 * on how large the system might be. 46 */ 47 #if CFG_NUM_THREADS < 2 48 #define PGT_CACHE_SIZE 4 49 #elif (CFG_NUM_THREADS == 2 && !defined(CFG_WITH_LPAE)) 50 #define PGT_CACHE_SIZE 8 51 #else 52 #define PGT_CACHE_SIZE ROUNDUP(CFG_NUM_THREADS * 2, PGT_NUM_PGT_PER_PAGE) 53 #endif 54 55 SLIST_HEAD(pgt_cache, pgt); 56 struct user_mode_ctx; 57 58 bool pgt_check_avail(struct user_mode_ctx *uctx); 59 60 /* 61 * pgt_get_all() - makes all needed translation tables available 62 * @uctx: the context to own the tables 63 * 64 * Guaranteed to succeed, but may need to sleep for a while to get all the 65 * needed translation tables. 66 */ 67 #if defined(CFG_CORE_PREALLOC_EL0_TBLS) 68 static inline void pgt_get_all(struct user_mode_ctx *uctx __unused) { } 69 #else 70 void pgt_get_all(struct user_mode_ctx *uctx); 71 #endif 72 73 /* 74 * pgt_put_all() - informs the translation table manager that these tables 75 * will not be needed for a while 76 * @uctx: the context owning the tables to make inactive 77 */ 78 #if defined(CFG_CORE_PREALLOC_EL0_TBLS) 79 static inline void pgt_put_all(struct user_mode_ctx *uctx __unused) { } 80 #else 81 void pgt_put_all(struct user_mode_ctx *uctx); 82 #endif 83 84 void pgt_clear_range(struct user_mode_ctx *uctx, vaddr_t begin, vaddr_t end); 85 void pgt_flush_range(struct user_mode_ctx *uctx, vaddr_t begin, vaddr_t last); 86 87 #if defined(CFG_CORE_PREALLOC_EL0_TBLS) 88 static inline struct pgt *pgt_pop_from_cache_list(vaddr_t vabase __unused, 89 struct ts_ctx *ctx __unused) 90 { return NULL; } 91 static inline void pgt_push_to_cache_list(struct pgt *pgt __unused) { } 92 #else 93 struct pgt *pgt_pop_from_cache_list(vaddr_t vabase, struct ts_ctx *ctx); 94 void pgt_push_to_cache_list(struct pgt *pgt); 95 #endif 96 97 #if defined(CFG_CORE_PREALLOC_EL0_TBLS) 98 static inline void pgt_init(void) { } 99 #else 100 void pgt_init(void); 101 #endif 102 103 void pgt_flush(struct user_mode_ctx *uctx); 104 105 #if defined(CFG_PAGED_USER_TA) 106 static inline void pgt_inc_used_entries(struct pgt *pgt) 107 { 108 pgt->num_used_entries++; 109 assert(pgt->num_used_entries); 110 } 111 112 static inline void pgt_dec_used_entries(struct pgt *pgt) 113 { 114 assert(pgt->num_used_entries); 115 pgt->num_used_entries--; 116 } 117 118 static inline void pgt_set_used_entries(struct pgt *pgt, size_t val) 119 { 120 pgt->num_used_entries = val; 121 } 122 123 #else 124 static inline void pgt_inc_used_entries(struct pgt *pgt __unused) 125 { 126 } 127 128 static inline void pgt_dec_used_entries(struct pgt *pgt __unused) 129 { 130 } 131 132 static inline void pgt_set_used_entries(struct pgt *pgt __unused, 133 size_t val __unused) 134 { 135 } 136 137 #endif 138 139 #endif /*__MM_PGT_CACHE_H*/ 140