69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020 Google LLC.
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* Written by David Brazdil <dbrazdil@google.com>
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*/
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#ifndef __ARM64_HYP_IMAGE_H__
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#define __ARM64_HYP_IMAGE_H__
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#define __HYP_CONCAT(a, b) a ## b
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#define HYP_CONCAT(a, b) __HYP_CONCAT(a, b)
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#ifndef __KVM_NVHE_HYPERVISOR__
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/*
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* KVM nVHE code has its own symbol namespace prefixed with __kvm_nvhe_,
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* to separate it from the kernel proper.
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*/
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#define kvm_nvhe_sym(sym) __kvm_nvhe_##sym
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#else
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#define kvm_nvhe_sym(sym) sym
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#endif
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#ifdef LINKER_SCRIPT
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/*
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* KVM nVHE ELF section names are prefixed with .hyp, to separate them
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* from the kernel proper.
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*/
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#define HYP_SECTION_NAME(NAME) .hyp##NAME
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/* Symbol defined at the beginning of each hyp section. */
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#define HYP_SECTION_SYMBOL_NAME(NAME) \
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HYP_CONCAT(__hyp_section_, HYP_SECTION_NAME(NAME))
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/*
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* Helper to generate linker script statements starting a hyp section.
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*
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* A symbol with a well-known name is defined at the first byte. This
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* is used as a base for hyp relocations (see gen-hyprel.c). It must
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* be defined inside the section so the linker of `vmlinux` cannot
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* separate it from the section data.
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*/
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#define BEGIN_HYP_SECTION(NAME) \
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HYP_SECTION_NAME(NAME) : { \
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HYP_SECTION_SYMBOL_NAME(NAME) = .;
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/* Helper to generate linker script statements ending a hyp section. */
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#define END_HYP_SECTION \
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}
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/* Defines an ELF hyp section from input section @NAME and its subsections. */
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#define HYP_SECTION(NAME) \
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BEGIN_HYP_SECTION(NAME) \
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*(NAME NAME##.*) \
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END_HYP_SECTION
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/*
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* Defines a linker script alias of a kernel-proper symbol referenced by
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* KVM nVHE hyp code.
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*/
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#define KVM_NVHE_ALIAS(sym) kvm_nvhe_sym(sym) = sym;
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/* Defines a linker script alias for KVM nVHE hyp symbols */
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#define KVM_NVHE_ALIAS_HYP(first, sec) kvm_nvhe_sym(first) = kvm_nvhe_sym(sec);
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#endif /* LINKER_SCRIPT */
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#endif /* __ARM64_HYP_IMAGE_H__ */
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