1 /* 2 * Copyright (c) 2021-2023, Arm Limited and Contributors. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #ifndef SME_H 8 #define SME_H 9 10 #include <stdbool.h> 11 #include <context.h> 12 13 /* 14 * Maximum value of LEN field in SMCR_ELx. This is different than the maximum 15 * supported value which is platform dependent. In the first version of SME the 16 * LEN field is limited to 4 bits but will be expanded in future iterations. 17 * To support different versions, the code that discovers the supported vector 18 * lengths will write the max value into SMCR_ELx then read it back to see how 19 * many bits are implemented. 20 */ 21 #define SME_SMCR_LEN_MAX U(0x1FF) 22 23 #if ENABLE_SME_FOR_NS 24 void sme_init_el3(void); 25 void sme_init_el2_unused(void); 26 void sme_enable(cpu_context_t *context); 27 void sme_disable(cpu_context_t *context); 28 void sme_enable_per_world(per_world_context_t *per_world_ctx); 29 void sme_disable_per_world(per_world_context_t *per_world_ctx); 30 #else 31 static inline void sme_init_el3(void) 32 { 33 } 34 static inline void sme_init_el2_unused(void) 35 { 36 } 37 static inline void sme_enable(cpu_context_t *context) 38 { 39 } 40 static inline void sme_disable(cpu_context_t *context) 41 { 42 } 43 static inline void sme_enable_per_world(per_world_context_t *per_world_ctx) 44 { 45 } 46 static inline void sme_disable_per_world(per_world_context_t *per_world_ctx) 47 { 48 } 49 #endif /* ENABLE_SME_FOR_NS */ 50 51 #endif /* SME_H */ 52