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ac4f6aaf85
Refactor MPAM3_EL3 to be world-specific, eliminating redundant cross-CPU value duplication and reducing memory footprint. Signed-off-by: Arvind Ram Prakash <arvind.ramprakash@arm.com> Change-Id: Iddf020a5462737e01ac35e4f2b2b204a8759fafb
41 lines
894 B
C
41 lines
894 B
C
/*
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* Copyright (c) 2018-2023, Arm Limited and Contributors. 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 <stdbool.h>
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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/mpam.h>
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void mpam_enable_per_world(per_world_context_t *per_world_ctx)
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{
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u_register_t mpam3_el3;
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/*
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* Enable MPAM, and disable trapping to EL3 when lower ELs access their
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* own MPAM registers
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*/
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mpam3_el3 = per_world_ctx->ctx_mpam3_el3;
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mpam3_el3 = (mpam3_el3 | MPAM3_EL3_MPAMEN_BIT) &
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~(MPAM3_EL3_TRAPLOWER_BIT);
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per_world_ctx->ctx_mpam3_el3 = mpam3_el3;
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}
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/*
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* If EL2 is implemented but unused, disable trapping to EL2 when lower ELs
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* access their own MPAM registers.
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*/
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void mpam_init_el2_unused(void)
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{
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write_mpam2_el2(0ULL);
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if ((read_mpamidr_el1() & MPAMIDR_HAS_HCR_BIT) != 0U) {
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write_mpamhcr_el2(0ULL);
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}
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}
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