1 /* 2 * Copyright (c) 2019-2021, 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_armv8_3_pauth_present(void)38static inline bool is_armv8_3_pauth_present(void) 39 { 40 uint64_t mask = (ID_AA64ISAR1_GPI_MASK << ID_AA64ISAR1_GPI_SHIFT) | 41 (ID_AA64ISAR1_GPA_MASK << ID_AA64ISAR1_GPA_SHIFT) | 42 (ID_AA64ISAR1_API_MASK << ID_AA64ISAR1_API_SHIFT) | 43 (ID_AA64ISAR1_APA_MASK << ID_AA64ISAR1_APA_SHIFT); 44 45 /* If any of the fields is not zero, PAuth is present */ 46 return (read_id_aa64isar1_el1() & mask) != 0U; 47 } 48 is_armv8_4_ttst_present(void)49static inline bool is_armv8_4_ttst_present(void) 50 { 51 return ((read_id_aa64mmfr2_el1() >> ID_AA64MMFR2_EL1_ST_SHIFT) & 52 ID_AA64MMFR2_EL1_ST_MASK) == 1U; 53 } 54 is_armv8_5_bti_present(void)55static inline bool is_armv8_5_bti_present(void) 56 { 57 return ((read_id_aa64pfr1_el1() >> ID_AA64PFR1_EL1_BT_SHIFT) & 58 ID_AA64PFR1_EL1_BT_MASK) == BTI_IMPLEMENTED; 59 } 60 get_armv8_5_mte_support(void)61static inline unsigned int get_armv8_5_mte_support(void) 62 { 63 return ((read_id_aa64pfr1_el1() >> ID_AA64PFR1_EL1_MTE_SHIFT) & 64 ID_AA64PFR1_EL1_MTE_MASK); 65 } 66 is_armv8_4_sel2_present(void)67static inline bool is_armv8_4_sel2_present(void) 68 { 69 return ((read_id_aa64pfr0_el1() >> ID_AA64PFR0_SEL2_SHIFT) & 70 ID_AA64PFR0_SEL2_MASK) == 1ULL; 71 } 72 is_armv8_6_twed_present(void)73static inline bool is_armv8_6_twed_present(void) 74 { 75 return (((read_id_aa64mmfr1_el1() >> ID_AA64MMFR1_EL1_TWED_SHIFT) & 76 ID_AA64MMFR1_EL1_TWED_MASK) == ID_AA64MMFR1_EL1_TWED_SUPPORTED); 77 } 78 is_armv8_6_fgt_present(void)79static inline bool is_armv8_6_fgt_present(void) 80 { 81 return ((read_id_aa64mmfr0_el1() >> ID_AA64MMFR0_EL1_FGT_SHIFT) & 82 ID_AA64MMFR0_EL1_FGT_MASK) == ID_AA64MMFR0_EL1_FGT_SUPPORTED; 83 } 84 get_armv8_6_ecv_support(void)85static inline unsigned long int get_armv8_6_ecv_support(void) 86 { 87 return ((read_id_aa64mmfr0_el1() >> ID_AA64MMFR0_EL1_ECV_SHIFT) & 88 ID_AA64MMFR0_EL1_ECV_MASK); 89 } 90 is_armv8_5_rng_present(void)91static inline bool is_armv8_5_rng_present(void) 92 { 93 return ((read_id_aa64isar0_el1() >> ID_AA64ISAR0_RNDR_SHIFT) & 94 ID_AA64ISAR0_RNDR_MASK); 95 } 96 is_armv8_6_feat_amuv1p1_present(void)97static inline bool is_armv8_6_feat_amuv1p1_present(void) 98 { 99 return (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_AMU_SHIFT) & 100 ID_AA64PFR0_AMU_MASK) >= ID_AA64PFR0_AMU_V1P1); 101 } 102 103 /* 104 * Return MPAM version: 105 * 106 * 0x00: None Armv8.0 or later 107 * 0x01: v0.1 Armv8.4 or later 108 * 0x10: v1.0 Armv8.2 or later 109 * 0x11: v1.1 Armv8.4 or later 110 * 111 */ get_mpam_version(void)112static inline unsigned int get_mpam_version(void) 113 { 114 return (unsigned int)((((read_id_aa64pfr0_el1() >> 115 ID_AA64PFR0_MPAM_SHIFT) & ID_AA64PFR0_MPAM_MASK) << 4) | 116 ((read_id_aa64pfr1_el1() >> 117 ID_AA64PFR1_MPAM_FRAC_SHIFT) & ID_AA64PFR1_MPAM_FRAC_MASK)); 118 } 119 is_feat_hcx_present(void)120static inline bool is_feat_hcx_present(void) 121 { 122 return (((read_id_aa64mmfr1_el1() >> ID_AA64MMFR1_EL1_HCX_SHIFT) & 123 ID_AA64MMFR1_EL1_HCX_MASK) == ID_AA64MMFR1_EL1_HCX_SUPPORTED); 124 } 125 get_armv9_2_feat_rme_support(void)126static inline unsigned int get_armv9_2_feat_rme_support(void) 127 { 128 /* 129 * Return the RME version, zero if not supported. This function can be 130 * used as both an integer value for the RME version or compared to zero 131 * to detect RME presence. 132 */ 133 return (unsigned int)(read_id_aa64pfr0_el1() >> 134 ID_AA64PFR0_FEAT_RME_SHIFT) & ID_AA64PFR0_FEAT_RME_MASK; 135 } 136 137 #endif /* ARCH_FEATURES_H */ 138