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/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2022 ARM Ltd. */ #ifndef __ASM_VECTORS_H #define __ASM_VECTORS_H #include #include #include extern char vectors[]; extern char tramp_vectors[]; extern char __bp_harden_el1_vectors[]; /* * Note: the order of this enum corresponds to two arrays in entry.S: * tramp_vecs and __bp_harden_el1_vectors. By default the canonical * 'full fat' vectors are used directly. */ enum arm64_bp_harden_el1_vectors { #ifdef CONFIG_MITIGATE_SPECTRE_BRANCH_HISTORY /* * Perform the BHB loop mitigation, before branching to the canonical * vectors. */ EL1_VECTOR_BHB_LOOP, /* * Make the SMC call for firmware mitigation, before branching to the * canonical vectors. */ EL1_VECTOR_BHB_FW, /* * Use the ClearBHB instruction, before branching to the canonical * vectors. */ EL1_VECTOR_BHB_CLEAR_INSN, #endif /* CONFIG_MITIGATE_SPECTRE_BRANCH_HISTORY */ /* * Remap the kernel before branching to the canonical vectors. */ EL1_VECTOR_KPTI, }; #ifndef CONFIG_MITIGATE_SPECTRE_BRANCH_HISTORY #define EL1_VECTOR_BHB_LOOP -1 #define EL1_VECTOR_BHB_FW -1 #define EL1_VECTOR_BHB_CLEAR_INSN -1 #endif /* !CONFIG_MITIGATE_SPECTRE_BRANCH_HISTORY */ /* The vectors to use on return from EL0. e.g. to remap the kernel */ DECLARE_PER_CPU_READ_MOSTLY(const char *, this_cpu_vector); #ifndef CONFIG_UNMAP_KERNEL_AT_