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 struct ts_ctx *ctx; 28 bool populated; 29 #if defined(CFG_PAGED_USER_TA) 30 uint16_t num_used_entries; 31 #endif 32 #if defined(CFG_WITH_PAGER) && !defined(CFG_WITH_LPAE) 33 struct pgt_parent *parent; 34 #endif 35 SLIST_ENTRY(pgt) link; 36 }; 37 38 /* 39 * A proper value for PGT_CACHE_SIZE depends on many factors: CFG_WITH_LPAE, 40 * CFG_TA_ASLR, size of TA, size of memrefs passed to TA, CFG_ULIBS_SHARED and 41 * possibly others. The value is based on the number of threads as an indicator 42 * on how large the system might be. 43 */ 44 #if CFG_NUM_THREADS < 2 45 #define PGT_CACHE_SIZE 4 46 #elif (CFG_NUM_THREADS == 2 && !defined(CFG_WITH_LPAE)) 47 #define PGT_CACHE_SIZE 8 48 #else 49 #define PGT_CACHE_SIZE ROUNDUP(CFG_NUM_THREADS * 2, PGT_NUM_PGT_PER_PAGE) 50 #endif 51 52 SLIST_HEAD(pgt_cache, pgt); 53 54 bool pgt_check_avail(struct vm_info *vm_info); 55 56 void pgt_alloc(struct pgt_cache *pgt_cache, struct ts_ctx *owning_ctx, 57 struct vm_info *vm_info); 58 void pgt_free(struct pgt_cache *pgt_cache); 59 60 void pgt_clear_ctx_range(struct pgt_cache *pgt_cache, struct ts_ctx *ctx, 61 vaddr_t begin, vaddr_t end); 62 void pgt_flush_ctx_range(struct pgt_cache *pgt_cache, struct ts_ctx *ctx, 63 vaddr_t begin, vaddr_t last); 64 65 struct pgt *pgt_pop_from_cache_list(vaddr_t vabase, struct ts_ctx *ctx); 66 void pgt_push_to_cache_list(struct pgt *pgt); 67 68 void pgt_init(void); 69 70 void pgt_flush_ctx(struct ts_ctx *ctx); 71 72 #if defined(CFG_PAGED_USER_TA) 73 static inline void pgt_inc_used_entries(struct pgt *pgt) 74 { 75 pgt->num_used_entries++; 76 assert(pgt->num_used_entries); 77 } 78 79 static inline void pgt_dec_used_entries(struct pgt *pgt) 80 { 81 assert(pgt->num_used_entries); 82 pgt->num_used_entries--; 83 } 84 85 static inline void pgt_set_used_entries(struct pgt *pgt, size_t val) 86 { 87 pgt->num_used_entries = val; 88 } 89 90 #else 91 static inline void pgt_inc_used_entries(struct pgt *pgt __unused) 92 { 93 } 94 95 static inline void pgt_dec_used_entries(struct pgt *pgt __unused) 96 { 97 } 98 99 static inline void pgt_set_used_entries(struct pgt *pgt __unused, 100 size_t val __unused) 101 { 102 } 103 104 #endif 105 106 #endif /*MM_PGT_CACHE_H*/ 107