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60d330dc4d
Combining the EL2 and EL3 enablement code necessitates that it must be called at el3_exit, which is the only place with enough context to make the decision of what needs to be set. Decouple them to allow them to be called from elsewhere. Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com> Change-Id: I147764c42771e7d4100699ec8fae98dac0a505c0
36 lines
791 B
C
36 lines
791 B
C
/*
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* Copyright (c) 2021-2023, 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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#include <arch.h>
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#include <arch_features.h>
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#include <arch_helpers.h>
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#include <lib/extensions/trf.h>
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void trf_init_el3(void)
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{
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u_register_t val;
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/*
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* MDCR_EL3.TTRF = b0
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* Allow access of trace filter control registers from NS-EL2
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* and NS-EL1 when NS-EL2 is implemented but not used
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*/
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val = read_mdcr_el3();
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val &= ~MDCR_TTRF_BIT;
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write_mdcr_el3(val);
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}
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void trf_init_el2_unused(void)
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{
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/*
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* MDCR_EL2.TTRF: Set to zero so that access to Trace
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* Filter Control register TRFCR_EL1 at EL1 is not
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* trapped to EL2. This bit is RES0 in versions of
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* the architecture earlier than ARMv8.4.
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*
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*/
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write_mdcr_el2(read_mdcr_el2() & ~MDCR_EL2_TTRF);
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}
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