/* 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) #ifndef __KVM_NVHE_HYPERVISOR__ /* * 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 #else #define kvm_nvhe_sym(sym) sym #endif #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; /* Defines a linker script alias for KVM nVHE hyp symbols */ #define KVM_NVHE_ALIAS_HYP(first, sec) kvm_nvhe_sym(first) = kvm_nvhe_sym(sec); #endif /* LINKER_SCRIPT */ #endif /* __ARM64_HYP_IMAGE_H__ */