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61 lines
1.7 KiB
61 lines
1.7 KiB
/* 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 <[email protected]> |
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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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/* |
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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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#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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#endif /* LINKER_SCRIPT */ |
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#endif /* __ARM64_HYP_IMAGE_H__ */
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