1 /* 2 * Copyright (c) 2019-2022, Arm Limited. All rights reserved. 3 * 4 * SPDX-License-Identifier: BSD-3-Clause 5 */ 6 7 #ifndef ARCH_FEATURES_H 8 #define ARCH_FEATURES_H 9 10 #include <stdbool.h> 11 12 #include <arch_helpers.h> 13 is_armv7_gentimer_present(void)14static inline bool is_armv7_gentimer_present(void) 15 { 16 /* The Generic Timer is always present in an ARMv8-A implementation */ 17 return true; 18 } 19 is_armv8_1_pan_present(void)20static inline bool is_armv8_1_pan_present(void) 21 { 22 return ((read_id_aa64mmfr1_el1() >> ID_AA64MMFR1_EL1_PAN_SHIFT) & 23 ID_AA64MMFR1_EL1_PAN_MASK) != 0U; 24 } 25 is_armv8_1_vhe_present(void)26static inline bool is_armv8_1_vhe_present(void) 27 { 28 return ((read_id_aa64mmfr1_el1() >> ID_AA64MMFR1_EL1_VHE_SHIFT) & 29 ID_AA64MMFR1_EL1_VHE_MASK) != 0U; 30 } 31 is_armv8_2_ttcnp_present(void)32static inline bool is_armv8_2_ttcnp_present(void) 33 { 34 return ((read_id_aa64mmfr2_el1() >> ID_AA64MMFR2_EL1_CNP_SHIFT) & 35 ID_AA64MMFR2_EL1_CNP_MASK) != 0U; 36 } 37 is_feat_pacqarma3_present(void)38static inline bool is_feat_pacqarma3_present(void) 39 { 40 uint64_t mask_id_aa64isar2 = 41 (ID_AA64ISAR2_GPA3_MASK << ID_AA64ISAR2_GPA3_SHIFT) | 42 (ID_AA64ISAR2_APA3_MASK << ID_AA64ISAR2_APA3_SHIFT); 43 44 /* If any of the fields is not zero, QARMA3 algorithm is present */ 45 return (read_id_aa64isar2_el1() & mask_id_aa64isar2) != 0U; 46 } 47 is_armv8_3_pauth_present(void)48static inline bool is_armv8_3_pauth_present(void) 49 { 50 uint64_t mask_id_aa64isar1 = 51 (ID_AA64ISAR1_GPI_MASK << ID_AA64ISAR1_GPI_SHIFT) | 52 (ID_AA64ISAR1_GPA_MASK << ID_AA64ISAR1_GPA_SHIFT) | 53 (ID_AA64ISAR1_API_MASK << ID_AA64ISAR1_API_SHIFT) | 54 (ID_AA64ISAR1_APA_MASK << ID_AA64ISAR1_APA_SHIFT); 55 56 /* 57 * If any of the fields is not zero or QARMA3 is present, 58 * PAuth is present 59 */ 60 return ((read_id_aa64isar1_el1() & mask_id_aa64isar1) != 0U || 61 is_feat_pacqarma3_present()); 62 } 63 is_armv8_4_dit_present(void)64static inline bool is_armv8_4_dit_present(void) 65 { 66 return ((read_id_aa64pfr0_el1() >> ID_AA64PFR0_DIT_SHIFT) & 67 ID_AA64PFR0_DIT_MASK) == 1U; 68 } 69 is_armv8_4_ttst_present(void)70static inline bool is_armv8_4_ttst_present(void) 71 { 72 return ((read_id_aa64mmfr2_el1() >> ID_AA64MMFR2_EL1_ST_SHIFT) & 73 ID_AA64MMFR2_EL1_ST_MASK) == 1U; 74 } 75 is_armv8_5_bti_present(void)76static inline bool is_armv8_5_bti_present(void) 77 { 78 return ((read_id_aa64pfr1_el1() >> ID_AA64PFR1_EL1_BT_SHIFT) & 79 ID_AA64PFR1_EL1_BT_MASK) == BTI_IMPLEMENTED; 80 } 81 get_armv8_5_mte_support(void)82static inline unsigned int get_armv8_5_mte_support(void) 83 { 84 return ((read_id_aa64pfr1_el1() >> ID_AA64PFR1_EL1_MTE_SHIFT) & 85 ID_AA64PFR1_EL1_MTE_MASK); 86 } 87 is_armv8_4_sel2_present(void)88static inline bool is_armv8_4_sel2_present(void) 89 { 90 return ((read_id_aa64pfr0_el1() >> ID_AA64PFR0_SEL2_SHIFT) & 91 ID_AA64PFR0_SEL2_MASK) == 1ULL; 92 } 93 is_armv8_6_twed_present(void)94static inline bool is_armv8_6_twed_present(void) 95 { 96 return (((read_id_aa64mmfr1_el1() >> ID_AA64MMFR1_EL1_TWED_SHIFT) & 97 ID_AA64MMFR1_EL1_TWED_MASK) == ID_AA64MMFR1_EL1_TWED_SUPPORTED); 98 } 99 is_armv8_6_fgt_present(void)100static inline bool is_armv8_6_fgt_present(void) 101 { 102 return ((read_id_aa64mmfr0_el1() >> ID_AA64MMFR0_EL1_FGT_SHIFT) & 103 ID_AA64MMFR0_EL1_FGT_MASK) != 0U; 104 } 105 get_armv8_6_ecv_support(void)106static inline unsigned long int get_armv8_6_ecv_support(void) 107 { 108 return ((read_id_aa64mmfr0_el1() >> ID_AA64MMFR0_EL1_ECV_SHIFT) & 109 ID_AA64MMFR0_EL1_ECV_MASK); 110 } 111 is_armv8_5_rng_present(void)112static inline bool is_armv8_5_rng_present(void) 113 { 114 return ((read_id_aa64isar0_el1() >> ID_AA64ISAR0_RNDR_SHIFT) & 115 ID_AA64ISAR0_RNDR_MASK); 116 } 117 is_armv8_6_feat_amuv1p1_present(void)118static inline bool is_armv8_6_feat_amuv1p1_present(void) 119 { 120 return (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_AMU_SHIFT) & 121 ID_AA64PFR0_AMU_MASK) >= ID_AA64PFR0_AMU_V1P1); 122 } 123 124 /* 125 * Return MPAM version: 126 * 127 * 0x00: None Armv8.0 or later 128 * 0x01: v0.1 Armv8.4 or later 129 * 0x10: v1.0 Armv8.2 or later 130 * 0x11: v1.1 Armv8.4 or later 131 * 132 */ get_mpam_version(void)133static inline unsigned int get_mpam_version(void) 134 { 135 return (unsigned int)((((read_id_aa64pfr0_el1() >> 136 ID_AA64PFR0_MPAM_SHIFT) & ID_AA64PFR0_MPAM_MASK) << 4) | 137 ((read_id_aa64pfr1_el1() >> 138 ID_AA64PFR1_MPAM_FRAC_SHIFT) & ID_AA64PFR1_MPAM_FRAC_MASK)); 139 } 140 is_feat_hcx_present(void)141static inline bool is_feat_hcx_present(void) 142 { 143 return (((read_id_aa64mmfr1_el1() >> ID_AA64MMFR1_EL1_HCX_SHIFT) & 144 ID_AA64MMFR1_EL1_HCX_MASK) == ID_AA64MMFR1_EL1_HCX_SUPPORTED); 145 } 146 is_feat_rng_trap_present(void)147static inline bool is_feat_rng_trap_present(void) 148 { 149 return (((read_id_aa64pfr1_el1() >> ID_AA64PFR1_EL1_RNDR_TRAP_SHIFT) & 150 ID_AA64PFR1_EL1_RNDR_TRAP_MASK) 151 == ID_AA64PFR1_EL1_RNG_TRAP_SUPPORTED); 152 } 153 get_armv9_2_feat_rme_support(void)154static inline unsigned int get_armv9_2_feat_rme_support(void) 155 { 156 /* 157 * Return the RME version, zero if not supported. This function can be 158 * used as both an integer value for the RME version or compared to zero 159 * to detect RME presence. 160 */ 161 return (unsigned int)(read_id_aa64pfr0_el1() >> 162 ID_AA64PFR0_FEAT_RME_SHIFT) & ID_AA64PFR0_FEAT_RME_MASK; 163 } 164 165 /********************************************************************************* 166 * Function to identify the presence of FEAT_SB (Speculation Barrier Instruction) 167 ********************************************************************************/ is_armv8_0_feat_sb_present(void)168static inline bool is_armv8_0_feat_sb_present(void) 169 { 170 return (((read_id_aa64isar1_el1() >> ID_AA64ISAR1_SB_SHIFT) & 171 ID_AA64ISAR1_SB_MASK) == ID_AA64ISAR1_SB_SUPPORTED); 172 } 173 174 /********************************************************************************* 175 * Function to identify the presence of FEAT_CSV2_2 (Cache Speculation Variant 2) 176 ********************************************************************************/ is_armv8_0_feat_csv2_2_present(void)177static inline bool is_armv8_0_feat_csv2_2_present(void) 178 { 179 return (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_CSV2_SHIFT) & 180 ID_AA64PFR0_CSV2_MASK) == ID_AA64PFR0_CSV2_2_SUPPORTED); 181 } 182 183 /********************************************************************************** 184 * Function to identify the presence of FEAT_SPE (Statistical Profiling Extension) 185 *********************************************************************************/ is_armv8_2_feat_spe_present(void)186static inline bool is_armv8_2_feat_spe_present(void) 187 { 188 return (((read_id_aa64dfr0_el1() >> ID_AA64DFR0_PMS_SHIFT) & 189 ID_AA64DFR0_PMS_MASK) != ID_AA64DFR0_SPE_NOT_SUPPORTED); 190 } 191 192 /******************************************************************************* 193 * Function to identify the presence of FEAT_SVE (Scalable Vector Extension) 194 ******************************************************************************/ is_armv8_2_feat_sve_present(void)195static inline bool is_armv8_2_feat_sve_present(void) 196 { 197 return (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_SVE_SHIFT) & 198 ID_AA64PFR0_SVE_MASK) == ID_AA64PFR0_SVE_SUPPORTED); 199 } 200 201 /******************************************************************************* 202 * Function to identify the presence of FEAT_RAS (Reliability,Availability, 203 * and Serviceability Extension) 204 ******************************************************************************/ is_armv8_2_feat_ras_present(void)205static inline bool is_armv8_2_feat_ras_present(void) 206 { 207 return (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_RAS_SHIFT) & 208 ID_AA64PFR0_RAS_MASK) != ID_AA64PFR0_RAS_NOT_SUPPORTED); 209 } 210 211 /************************************************************************** 212 * Function to identify the presence of FEAT_DIT (Data Independent Timing) 213 *************************************************************************/ is_armv8_4_feat_dit_present(void)214static inline bool is_armv8_4_feat_dit_present(void) 215 { 216 return (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_DIT_SHIFT) & 217 ID_AA64PFR0_DIT_MASK) == ID_AA64PFR0_DIT_SUPPORTED); 218 } 219 220 /************************************************************************* 221 * Function to identify the presence of FEAT_TRF (TraceLift) 222 ************************************************************************/ is_arm8_4_feat_trf_present(void)223static inline bool is_arm8_4_feat_trf_present(void) 224 { 225 return (((read_id_aa64dfr0_el1() >> ID_AA64DFR0_TRACEFILT_SHIFT) & 226 ID_AA64DFR0_TRACEFILT_MASK) == ID_AA64DFR0_TRACEFILT_SUPPORTED); 227 } 228 229 /******************************************************************************* 230 * Function to identify the presence of FEAT_AMUv1 (Activity Monitors- 231 * Extension v1) 232 ******************************************************************************/ is_armv8_4_feat_amuv1_present(void)233static inline bool is_armv8_4_feat_amuv1_present(void) 234 { 235 return (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_AMU_SHIFT) & 236 ID_AA64PFR0_AMU_MASK) >= ID_AA64PFR0_AMU_V1); 237 } 238 239 /******************************************************************************** 240 * Function to identify the presence of FEAT_NV2 (Enhanced Nested Virtualization 241 * Support) 242 *******************************************************************************/ get_armv8_4_feat_nv_support(void)243static inline unsigned int get_armv8_4_feat_nv_support(void) 244 { 245 return (((read_id_aa64mmfr2_el1() >> ID_AA64MMFR2_EL1_NV_SHIFT) & 246 ID_AA64MMFR2_EL1_NV_MASK)); 247 } 248 249 /******************************************************************************* 250 * Function to identify the presence of FEAT_BRBE (Branch Record Buffer 251 * Extension) 252 ******************************************************************************/ is_feat_brbe_present(void)253static inline bool is_feat_brbe_present(void) 254 { 255 return (((read_id_aa64dfr0_el1() >> ID_AA64DFR0_BRBE_SHIFT) & 256 ID_AA64DFR0_BRBE_MASK) == ID_AA64DFR0_BRBE_SUPPORTED); 257 } 258 259 /******************************************************************************* 260 * Function to identify the presence of FEAT_TRBE (Trace Buffer Extension) 261 ******************************************************************************/ is_feat_trbe_present(void)262static inline bool is_feat_trbe_present(void) 263 { 264 return (((read_id_aa64dfr0_el1() >> ID_AA64DFR0_TRACEBUFFER_SHIFT) & 265 ID_AA64DFR0_TRACEBUFFER_MASK) == ID_AA64DFR0_TRACEBUFFER_SUPPORTED); 266 } 267 268 #endif /* ARCH_FEATURES_H */ 269