228 lines
7.5 KiB
C
228 lines
7.5 KiB
C
/*
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* Copyright (c) 2019-2022, Arm Limited. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef ARCH_FEATURES_H
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#define ARCH_FEATURES_H
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#include <stdbool.h>
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#include <arch_helpers.h>
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static inline bool is_armv7_gentimer_present(void)
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{
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/* The Generic Timer is always present in an ARMv8-A implementation */
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return true;
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}
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static inline bool is_armv8_1_pan_present(void)
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{
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return ((read_id_aa64mmfr1_el1() >> ID_AA64MMFR1_EL1_PAN_SHIFT) &
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ID_AA64MMFR1_EL1_PAN_MASK) != 0U;
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}
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static inline bool is_armv8_1_vhe_present(void)
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{
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return ((read_id_aa64mmfr1_el1() >> ID_AA64MMFR1_EL1_VHE_SHIFT) &
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ID_AA64MMFR1_EL1_VHE_MASK) != 0U;
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}
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static inline bool is_armv8_2_ttcnp_present(void)
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{
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return ((read_id_aa64mmfr2_el1() >> ID_AA64MMFR2_EL1_CNP_SHIFT) &
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ID_AA64MMFR2_EL1_CNP_MASK) != 0U;
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}
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static inline bool is_armv8_3_pauth_present(void)
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{
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uint64_t mask = (ID_AA64ISAR1_GPI_MASK << ID_AA64ISAR1_GPI_SHIFT) |
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(ID_AA64ISAR1_GPA_MASK << ID_AA64ISAR1_GPA_SHIFT) |
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(ID_AA64ISAR1_API_MASK << ID_AA64ISAR1_API_SHIFT) |
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(ID_AA64ISAR1_APA_MASK << ID_AA64ISAR1_APA_SHIFT);
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/* If any of the fields is not zero, PAuth is present */
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return (read_id_aa64isar1_el1() & mask) != 0U;
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}
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static inline bool is_armv8_4_dit_present(void)
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{
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return ((read_id_aa64pfr0_el1() >> ID_AA64PFR0_DIT_SHIFT) &
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ID_AA64PFR0_DIT_MASK) == 1U;
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}
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static inline bool is_armv8_4_ttst_present(void)
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{
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return ((read_id_aa64mmfr2_el1() >> ID_AA64MMFR2_EL1_ST_SHIFT) &
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ID_AA64MMFR2_EL1_ST_MASK) == 1U;
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}
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static inline bool is_armv8_5_bti_present(void)
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{
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return ((read_id_aa64pfr1_el1() >> ID_AA64PFR1_EL1_BT_SHIFT) &
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ID_AA64PFR1_EL1_BT_MASK) == BTI_IMPLEMENTED;
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}
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static inline unsigned int get_armv8_5_mte_support(void)
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{
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return ((read_id_aa64pfr1_el1() >> ID_AA64PFR1_EL1_MTE_SHIFT) &
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ID_AA64PFR1_EL1_MTE_MASK);
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}
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static inline bool is_armv8_4_sel2_present(void)
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{
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return ((read_id_aa64pfr0_el1() >> ID_AA64PFR0_SEL2_SHIFT) &
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ID_AA64PFR0_SEL2_MASK) == 1ULL;
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}
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static inline bool is_armv8_6_twed_present(void)
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{
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return (((read_id_aa64mmfr1_el1() >> ID_AA64MMFR1_EL1_TWED_SHIFT) &
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ID_AA64MMFR1_EL1_TWED_MASK) == ID_AA64MMFR1_EL1_TWED_SUPPORTED);
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}
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static inline bool is_armv8_6_fgt_present(void)
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{
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return ((read_id_aa64mmfr0_el1() >> ID_AA64MMFR0_EL1_FGT_SHIFT) &
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ID_AA64MMFR0_EL1_FGT_MASK) == ID_AA64MMFR0_EL1_FGT_SUPPORTED;
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}
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static inline unsigned long int get_armv8_6_ecv_support(void)
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{
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return ((read_id_aa64mmfr0_el1() >> ID_AA64MMFR0_EL1_ECV_SHIFT) &
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ID_AA64MMFR0_EL1_ECV_MASK);
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}
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static inline bool is_armv8_5_rng_present(void)
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{
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return ((read_id_aa64isar0_el1() >> ID_AA64ISAR0_RNDR_SHIFT) &
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ID_AA64ISAR0_RNDR_MASK);
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}
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static inline bool is_armv8_6_feat_amuv1p1_present(void)
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{
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return (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_AMU_SHIFT) &
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ID_AA64PFR0_AMU_MASK) >= ID_AA64PFR0_AMU_V1P1);
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}
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/*
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* Return MPAM version:
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*
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* 0x00: None Armv8.0 or later
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* 0x01: v0.1 Armv8.4 or later
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* 0x10: v1.0 Armv8.2 or later
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* 0x11: v1.1 Armv8.4 or later
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*
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*/
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static inline unsigned int get_mpam_version(void)
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{
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return (unsigned int)((((read_id_aa64pfr0_el1() >>
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ID_AA64PFR0_MPAM_SHIFT) & ID_AA64PFR0_MPAM_MASK) << 4) |
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((read_id_aa64pfr1_el1() >>
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ID_AA64PFR1_MPAM_FRAC_SHIFT) & ID_AA64PFR1_MPAM_FRAC_MASK));
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}
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static inline bool is_feat_hcx_present(void)
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{
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return (((read_id_aa64mmfr1_el1() >> ID_AA64MMFR1_EL1_HCX_SHIFT) &
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ID_AA64MMFR1_EL1_HCX_MASK) == ID_AA64MMFR1_EL1_HCX_SUPPORTED);
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}
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static inline unsigned int get_armv9_2_feat_rme_support(void)
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{
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/*
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* Return the RME version, zero if not supported. This function can be
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* used as both an integer value for the RME version or compared to zero
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* to detect RME presence.
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*/
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return (unsigned int)(read_id_aa64pfr0_el1() >>
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ID_AA64PFR0_FEAT_RME_SHIFT) & ID_AA64PFR0_FEAT_RME_MASK;
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}
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/*********************************************************************************
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* Function to identify the presence of FEAT_SB (Speculation Barrier Instruction)
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********************************************************************************/
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static inline bool is_armv8_0_feat_sb_present(void)
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{
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return (((read_id_aa64isar1_el1() >> ID_AA64ISAR1_SB_SHIFT) &
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ID_AA64ISAR1_SB_MASK) == ID_AA64ISAR1_SB_SUPPORTED);
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}
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/*********************************************************************************
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* Function to identify the presence of FEAT_CSV2_2 (Cache Speculation Variant 2)
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********************************************************************************/
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static inline bool is_armv8_0_feat_csv2_2_present(void)
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{
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return (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_CSV2_SHIFT) &
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ID_AA64PFR0_CSV2_MASK) == ID_AA64PFR0_CSV2_2_SUPPORTED);
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}
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/**********************************************************************************
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* Function to identify the presence of FEAT_SPE (Statistical Profiling Extension)
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*********************************************************************************/
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static inline bool is_armv8_2_feat_spe_present(void)
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{
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return (((read_id_aa64dfr0_el1() >> ID_AA64DFR0_PMS_SHIFT) &
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ID_AA64DFR0_PMS_MASK) != ID_AA64DFR0_SPE_NOT_SUPPORTED);
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}
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/*******************************************************************************
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* Function to identify the presence of FEAT_SVE (Scalable Vector Extension)
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******************************************************************************/
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static inline bool is_armv8_2_feat_sve_present(void)
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{
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return (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_SVE_SHIFT) &
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ID_AA64PFR0_SVE_MASK) == ID_AA64PFR0_SVE_SUPPORTED);
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}
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/*******************************************************************************
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* Function to identify the presence of FEAT_RAS (Reliability,Availability,
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* and Serviceability Extension)
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******************************************************************************/
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static inline bool is_armv8_2_feat_ras_present(void)
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{
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return (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_RAS_SHIFT) &
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ID_AA64PFR0_RAS_MASK) != ID_AA64PFR0_RAS_NOT_SUPPORTED);
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}
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/**************************************************************************
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* Function to identify the presence of FEAT_DIT (Data Independent Timing)
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*************************************************************************/
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static inline bool is_armv8_4_feat_dit_present(void)
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{
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return (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_DIT_SHIFT) &
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ID_AA64PFR0_DIT_MASK) == ID_AA64PFR0_DIT_SUPPORTED);
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}
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/*************************************************************************
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* Function to identify the presence of FEAT_TRF (TraceLift)
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************************************************************************/
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static inline bool is_arm8_4_feat_trf_present(void)
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{
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return (((read_id_aa64dfr0_el1() >> ID_AA64DFR0_TRACEFILT_SHIFT) &
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ID_AA64DFR0_TRACEFILT_MASK) == ID_AA64DFR0_TRACEFILT_SUPPORTED);
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}
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/*******************************************************************************
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* Function to identify the presence of FEAT_AMUv1 (Activity Monitors-
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* Extension v1)
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******************************************************************************/
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static inline bool is_armv8_4_feat_amuv1_present(void)
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{
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return (((read_id_aa64pfr0_el1() >> ID_AA64PFR0_AMU_SHIFT) &
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ID_AA64PFR0_AMU_MASK) >= ID_AA64PFR0_AMU_V1);
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}
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/********************************************************************************
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* Function to identify the presence of FEAT_NV2 (Enhanced Nested Virtualization
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* Support)
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*******************************************************************************/
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static inline unsigned int get_armv8_4_feat_nv_support(void)
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{
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return (((read_id_aa64mmfr2_el1() >> ID_AA64MMFR2_EL1_NV_SHIFT) &
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ID_AA64MMFR2_EL1_NV_MASK));
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}
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#endif /* ARCH_FEATURES_H */
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