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