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0ed3be6fc2
This patch introduces support to handle traps from lower ELs for IMPDEF system register accesses. The actual support is left to the platforms to implement. Signed-off-by: Varun Wadekar <vwadekar@nvidia.com> Change-Id: I623d5c432b4ce4328b68f238c15b1c83df97c1e5
30 lines
764 B
C
30 lines
764 B
C
/*
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* Copyright (c) 2022, ARM Limited. All rights reserved.
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* Copyright (c) 2023, NVIDIA Corporation. 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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* Dispatch synchronous system register traps from lower ELs.
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*/
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#include <bl31/sync_handle.h>
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#include <context.h>
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int handle_sysreg_trap(uint64_t esr_el3, cpu_context_t *ctx)
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{
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uint64_t __unused opcode = esr_el3 & ISS_SYSREG_OPCODE_MASK;
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#if ENABLE_FEAT_RNG_TRAP
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if ((opcode == ISS_SYSREG_OPCODE_RNDR) || (opcode == ISS_SYSREG_OPCODE_RNDRRS)) {
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return plat_handle_rng_trap(esr_el3, ctx);
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}
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#endif
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#if IMPDEF_SYSREG_TRAP
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if ((opcode & ISS_SYSREG_OPCODE_IMPDEF) == ISS_SYSREG_OPCODE_IMPDEF) {
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return plat_handle_impdef_trap(esr_el3, ctx);
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}
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#endif
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return TRAP_RET_UNHANDLED;
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}
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