You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
388 lines
13 KiB
388 lines
13 KiB
/*
|
|
* Copyright (c) 2022-2024, Arm Limited and Contributors. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#include <arch_features.h>
|
|
#include <common/debug.h>
|
|
#include <common/feat_detect.h>
|
|
|
|
static bool tainted;
|
|
|
|
/*******************************************************************************
|
|
* This section lists the wrapper modules for each feature to evaluate the
|
|
* feature states (FEAT_STATE_ALWAYS and FEAT_STATE_CHECK) and perform
|
|
* necessary action as below:
|
|
*
|
|
* It verifies whether the FEAT_XXX (eg: FEAT_SB) is supported by the PE or not.
|
|
* Without this check an exception would occur during context save/restore
|
|
* routines, if the feature is enabled but not supported by PE.
|
|
******************************************************************************/
|
|
|
|
#define feat_detect_panic(a, b) ((a) ? (void)0 : feature_panic(b))
|
|
|
|
/*******************************************************************************
|
|
* Function : feature_panic
|
|
* Customised panic function with error logging mechanism to list the feature
|
|
* not supported by the PE.
|
|
******************************************************************************/
|
|
static inline void feature_panic(char *feat_name)
|
|
{
|
|
ERROR("FEAT_%s not supported by the PE\n", feat_name);
|
|
panic();
|
|
}
|
|
|
|
/*******************************************************************************
|
|
* Function : check_feature
|
|
* Check for a valid combination of build time flags (ENABLE_FEAT_xxx) and
|
|
* feature availability on the hardware. <min> is the smallest feature
|
|
* ID field value that is required for that feature.
|
|
* Triggers a panic later if a feature is forcefully enabled, but not
|
|
* available on the PE. Also will panic if the hardware feature ID field
|
|
* is larger than the maximum known and supported number, specified by <max>.
|
|
*
|
|
* We force inlining here to let the compiler optimise away the whole check
|
|
* if the feature is disabled at build time (FEAT_STATE_DISABLED).
|
|
******************************************************************************/
|
|
static inline void __attribute((__always_inline__))
|
|
check_feature(int state, unsigned long field, const char *feat_name,
|
|
unsigned int min, unsigned int max)
|
|
{
|
|
if (state == FEAT_STATE_ALWAYS && field < min) {
|
|
ERROR("FEAT_%s not supported by the PE\n", feat_name);
|
|
tainted = true;
|
|
}
|
|
if (state >= FEAT_STATE_ALWAYS && field > max) {
|
|
ERROR("FEAT_%s is version %ld, but is only known up to version %d\n",
|
|
feat_name, field, max);
|
|
tainted = true;
|
|
}
|
|
}
|
|
|
|
/************************************************
|
|
* Feature : FEAT_PAUTH (Pointer Authentication)
|
|
***********************************************/
|
|
static void read_feat_pauth(void)
|
|
{
|
|
#if (ENABLE_PAUTH == FEAT_STATE_ALWAYS) || (CTX_INCLUDE_PAUTH_REGS == FEAT_STATE_ALWAYS)
|
|
feat_detect_panic(is_armv8_3_pauth_present(), "PAUTH");
|
|
#endif
|
|
}
|
|
|
|
static unsigned int read_feat_rng_trap_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64pfr1_el1(), ID_AA64PFR1_EL1_RNDR_TRAP_SHIFT,
|
|
ID_AA64PFR1_EL1_RNDR_TRAP_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_bti_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64pfr1_el1(), ID_AA64PFR1_EL1_BT_SHIFT,
|
|
ID_AA64PFR1_EL1_BT_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_sb_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64isar1_el1(), ID_AA64ISAR1_SB_SHIFT,
|
|
ID_AA64ISAR1_SB_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_csv2_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64pfr0_el1(), ID_AA64PFR0_CSV2_SHIFT,
|
|
ID_AA64PFR0_CSV2_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_debugv8p9_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64dfr0_el1(), ID_AA64DFR0_DEBUGVER_SHIFT,
|
|
ID_AA64DFR0_DEBUGVER_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_pmuv3_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64dfr0_el1(), ID_AA64DFR0_PMUVER_SHIFT,
|
|
ID_AA64DFR0_PMUVER_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_vhe_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64mmfr1_el1(), ID_AA64MMFR1_EL1_VHE_SHIFT,
|
|
ID_AA64MMFR1_EL1_VHE_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_sve_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64pfr0_el1(), ID_AA64PFR0_SVE_SHIFT,
|
|
ID_AA64PFR0_SVE_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_ras_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64pfr0_el1(), ID_AA64PFR0_RAS_SHIFT,
|
|
ID_AA64PFR0_RAS_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_dit_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64pfr0_el1(), ID_AA64PFR0_DIT_SHIFT,
|
|
ID_AA64PFR0_DIT_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_amu_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64pfr0_el1(), ID_AA64PFR0_AMU_SHIFT,
|
|
ID_AA64PFR0_AMU_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_mpam_version(void)
|
|
{
|
|
return (unsigned int)((((read_id_aa64pfr0_el1() >>
|
|
ID_AA64PFR0_MPAM_SHIFT) & ID_AA64PFR0_MPAM_MASK) << 4) |
|
|
((read_id_aa64pfr1_el1() >>
|
|
ID_AA64PFR1_MPAM_FRAC_SHIFT) & ID_AA64PFR1_MPAM_FRAC_MASK));
|
|
}
|
|
|
|
static unsigned int read_feat_nv_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64mmfr2_el1(), ID_AA64MMFR2_EL1_NV_SHIFT,
|
|
ID_AA64MMFR2_EL1_NV_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_sel2_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64pfr0_el1(), ID_AA64PFR0_SEL2_SHIFT,
|
|
ID_AA64PFR0_SEL2_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_trf_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64dfr0_el1(), ID_AA64DFR0_TRACEFILT_SHIFT,
|
|
ID_AA64DFR0_TRACEFILT_MASK);
|
|
}
|
|
static unsigned int get_armv8_5_mte_support(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64pfr1_el1(), ID_AA64PFR1_EL1_MTE_SHIFT,
|
|
ID_AA64PFR1_EL1_MTE_MASK);
|
|
}
|
|
static unsigned int read_feat_rng_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64isar0_el1(), ID_AA64ISAR0_RNDR_SHIFT,
|
|
ID_AA64ISAR0_RNDR_MASK);
|
|
}
|
|
static unsigned int read_feat_fgt_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64mmfr0_el1(), ID_AA64MMFR0_EL1_FGT_SHIFT,
|
|
ID_AA64MMFR0_EL1_FGT_MASK);
|
|
}
|
|
static unsigned int read_feat_ecv_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64mmfr0_el1(), ID_AA64MMFR0_EL1_ECV_SHIFT,
|
|
ID_AA64MMFR0_EL1_ECV_MASK);
|
|
}
|
|
static unsigned int read_feat_twed_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64mmfr1_el1(), ID_AA64MMFR1_EL1_TWED_SHIFT,
|
|
ID_AA64MMFR1_EL1_TWED_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_hcx_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64mmfr1_el1(), ID_AA64MMFR1_EL1_HCX_SHIFT,
|
|
ID_AA64MMFR1_EL1_HCX_MASK);
|
|
}
|
|
static unsigned int read_feat_tcr2_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64mmfr3_el1(), ID_AA64MMFR3_EL1_TCRX_SHIFT,
|
|
ID_AA64MMFR3_EL1_TCRX_MASK);
|
|
}
|
|
static unsigned int read_feat_s2pie_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64mmfr3_el1(), ID_AA64MMFR3_EL1_S2PIE_SHIFT,
|
|
ID_AA64MMFR3_EL1_S2PIE_MASK);
|
|
}
|
|
static unsigned int read_feat_s1pie_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64mmfr3_el1(), ID_AA64MMFR3_EL1_S1PIE_SHIFT,
|
|
ID_AA64MMFR3_EL1_S1PIE_MASK);
|
|
}
|
|
static unsigned int read_feat_s2poe_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64mmfr3_el1(), ID_AA64MMFR3_EL1_S2POE_SHIFT,
|
|
ID_AA64MMFR3_EL1_S2POE_MASK);
|
|
}
|
|
static unsigned int read_feat_s1poe_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64mmfr3_el1(), ID_AA64MMFR3_EL1_S1POE_SHIFT,
|
|
ID_AA64MMFR3_EL1_S1POE_MASK);
|
|
}
|
|
static unsigned int read_feat_brbe_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64dfr0_el1(), ID_AA64DFR0_BRBE_SHIFT,
|
|
ID_AA64DFR0_BRBE_MASK);
|
|
}
|
|
static unsigned int read_feat_trbe_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64dfr0_el1(), ID_AA64DFR0_TRACEBUFFER_SHIFT,
|
|
ID_AA64DFR0_TRACEBUFFER_MASK);
|
|
}
|
|
static unsigned int read_feat_sme_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64pfr1_el1(), ID_AA64PFR1_EL1_SME_SHIFT,
|
|
ID_AA64PFR1_EL1_SME_MASK);
|
|
}
|
|
static unsigned int read_feat_gcs_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64pfr1_el1(), ID_AA64PFR1_EL1_GCS_SHIFT,
|
|
ID_AA64PFR1_EL1_GCS_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_rme_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64pfr0_el1(), ID_AA64PFR0_FEAT_RME_SHIFT,
|
|
ID_AA64PFR0_FEAT_RME_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_pan_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64mmfr1_el1(), ID_AA64MMFR1_EL1_PAN_SHIFT,
|
|
ID_AA64MMFR1_EL1_PAN_MASK);
|
|
}
|
|
|
|
static unsigned int read_feat_mtpmu_id_field(void)
|
|
{
|
|
return ISOLATE_FIELD(read_id_aa64dfr0_el1(), ID_AA64DFR0_MTPMU_SHIFT,
|
|
ID_AA64DFR0_MTPMU_MASK);
|
|
|
|
}
|
|
|
|
/***********************************************************************************
|
|
* TF-A supports many Arm architectural features starting from arch version
|
|
* (8.0 till 8.7+). These features are mostly enabled through build flags. This
|
|
* mechanism helps in validating these build flags in the early boot phase
|
|
* either in BL1 or BL31 depending on the platform and assists in identifying
|
|
* and notifying the features which are enabled but not supported by the PE.
|
|
*
|
|
* It reads all the enabled features ID-registers and ensures the features
|
|
* are supported by the PE.
|
|
* In case if they aren't it stops booting at an early phase and logs the error
|
|
* messages, notifying the platforms about the features that are not supported.
|
|
*
|
|
* Further the procedure is implemented with a tri-state approach for each feature:
|
|
* ENABLE_FEAT_xxx = 0 : The feature is disabled statically at compile time
|
|
* ENABLE_FEAT_xxx = 1 : The feature is enabled and must be present in hardware.
|
|
* There will be panic if feature is not present at cold boot.
|
|
* ENABLE_FEAT_xxx = 2 : The feature is enabled but dynamically enabled at runtime
|
|
* depending on hardware capability.
|
|
*
|
|
* For better readability, state values are defined with macros, namely:
|
|
* { FEAT_STATE_DISABLED, FEAT_STATE_ALWAYS, FEAT_STATE_CHECK }, taking values
|
|
* { 0, 1, 2 }, respectively, as their naming.
|
|
**********************************************************************************/
|
|
void detect_arch_features(void)
|
|
{
|
|
tainted = false;
|
|
|
|
/* v8.0 features */
|
|
check_feature(ENABLE_FEAT_SB, read_feat_sb_id_field(), "SB", 1, 1);
|
|
check_feature(ENABLE_FEAT_CSV2_2, read_feat_csv2_id_field(),
|
|
"CSV2_2", 2, 3);
|
|
/*
|
|
* Even though the PMUv3 is an OPTIONAL feature, it is always
|
|
* implemented and Arm prescribes so. So assume it will be there and do
|
|
* away with a flag for it. This is used to check minor PMUv3px
|
|
* revisions so that we catch them as they come along
|
|
*/
|
|
check_feature(FEAT_STATE_ALWAYS, read_feat_pmuv3_id_field(),
|
|
"PMUv3", 1, ID_AA64DFR0_PMUVER_PMUV3P8);
|
|
|
|
/* v8.1 features */
|
|
check_feature(ENABLE_FEAT_PAN, read_feat_pan_id_field(), "PAN", 1, 3);
|
|
check_feature(ENABLE_FEAT_VHE, read_feat_vhe_id_field(), "VHE", 1, 1);
|
|
|
|
/* v8.2 features */
|
|
check_feature(ENABLE_SVE_FOR_NS, read_feat_sve_id_field(),
|
|
"SVE", 1, 1);
|
|
check_feature(ENABLE_FEAT_RAS, read_feat_ras_id_field(), "RAS", 1, 2);
|
|
|
|
/* v8.3 features */
|
|
/* TODO: Pauth yet to convert to tri-state feat detect logic */
|
|
read_feat_pauth();
|
|
|
|
/* v8.4 features */
|
|
check_feature(ENABLE_FEAT_DIT, read_feat_dit_id_field(), "DIT", 1, 1);
|
|
check_feature(ENABLE_FEAT_AMU, read_feat_amu_id_field(),
|
|
"AMUv1", 1, 2);
|
|
check_feature(ENABLE_FEAT_MPAM, read_feat_mpam_version(),
|
|
"MPAM", 1, 17);
|
|
check_feature(CTX_INCLUDE_NEVE_REGS, read_feat_nv_id_field(),
|
|
"NV2", 2, 2);
|
|
check_feature(ENABLE_FEAT_SEL2, read_feat_sel2_id_field(),
|
|
"SEL2", 1, 1);
|
|
check_feature(ENABLE_TRF_FOR_NS, read_feat_trf_id_field(),
|
|
"TRF", 1, 1);
|
|
|
|
/* v8.5 features */
|
|
check_feature(ENABLE_FEAT_MTE2, get_armv8_5_mte_support(), "MTE2",
|
|
MTE_IMPLEMENTED_ELX, MTE_IMPLEMENTED_ASY);
|
|
check_feature(ENABLE_FEAT_RNG, read_feat_rng_id_field(), "RNG", 1, 1);
|
|
check_feature(ENABLE_BTI, read_feat_bti_id_field(), "BTI", 1, 1);
|
|
check_feature(ENABLE_FEAT_RNG_TRAP, read_feat_rng_trap_id_field(),
|
|
"RNG_TRAP", 1, 1);
|
|
|
|
/* v8.6 features */
|
|
check_feature(ENABLE_FEAT_AMUv1p1, read_feat_amu_id_field(),
|
|
"AMUv1p1", 2, 2);
|
|
check_feature(ENABLE_FEAT_FGT, read_feat_fgt_id_field(), "FGT", 1, 2);
|
|
check_feature(ENABLE_FEAT_FGT2, read_feat_fgt_id_field(), "FGT2", 2, 2);
|
|
check_feature(ENABLE_FEAT_ECV, read_feat_ecv_id_field(), "ECV", 1, 2);
|
|
check_feature(ENABLE_FEAT_TWED, read_feat_twed_id_field(),
|
|
"TWED", 1, 1);
|
|
|
|
/*
|
|
* even though this is a "DISABLE" it does confusingly perform feature
|
|
* enablement duties like all other flags here. Check it against the HW
|
|
* feature when we intend to diverge from the default behaviour
|
|
*/
|
|
check_feature(DISABLE_MTPMU, read_feat_mtpmu_id_field(), "MTPMU", 1, 1);
|
|
|
|
/* v8.7 features */
|
|
check_feature(ENABLE_FEAT_HCX, read_feat_hcx_id_field(), "HCX", 1, 1);
|
|
|
|
/* v8.9 features */
|
|
check_feature(ENABLE_FEAT_TCR2, read_feat_tcr2_id_field(),
|
|
"TCR2", 1, 1);
|
|
check_feature(ENABLE_FEAT_S2PIE, read_feat_s2pie_id_field(),
|
|
"S2PIE", 1, 1);
|
|
check_feature(ENABLE_FEAT_S1PIE, read_feat_s1pie_id_field(),
|
|
"S1PIE", 1, 1);
|
|
check_feature(ENABLE_FEAT_S2POE, read_feat_s2poe_id_field(),
|
|
"S2POE", 1, 1);
|
|
check_feature(ENABLE_FEAT_S1POE, read_feat_s1poe_id_field(),
|
|
"S1POE", 1, 1);
|
|
check_feature(ENABLE_FEAT_CSV2_3, read_feat_csv2_id_field(),
|
|
"CSV2_3", 3, 3);
|
|
check_feature(ENABLE_FEAT_DEBUGV8P9, read_feat_debugv8p9_id_field(),
|
|
"DEBUGV8P9", 11, 11);
|
|
|
|
/* v9.0 features */
|
|
check_feature(ENABLE_BRBE_FOR_NS, read_feat_brbe_id_field(),
|
|
"BRBE", 1, 2);
|
|
check_feature(ENABLE_TRBE_FOR_NS, read_feat_trbe_id_field(),
|
|
"TRBE", 1, 1);
|
|
|
|
/* v9.2 features */
|
|
check_feature(ENABLE_SME_FOR_NS, read_feat_sme_id_field(),
|
|
"SME", 1, 2);
|
|
check_feature(ENABLE_SME2_FOR_NS, read_feat_sme_id_field(),
|
|
"SME2", 2, 2);
|
|
|
|
/* v9.4 features */
|
|
check_feature(ENABLE_FEAT_GCS, read_feat_gcs_id_field(), "GCS", 1, 1);
|
|
check_feature(ENABLE_RME, read_feat_rme_id_field(), "RME", 1, 1);
|
|
|
|
if (tainted) {
|
|
panic();
|
|
}
|
|
}
|
|
|