Файловый менеджер - Редактировать - /usr/src/linux-headers-5.4.0-200/arch/x86/include/asm/mem_encrypt.h
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/* SPDX-License-Identifier: GPL-2.0-only */ /* * AMD Memory Encryption Support * * Copyright (C) 2016 Advanced Micro Devices, Inc. * * Author: Tom Lendacky <thomas.lendacky@amd.com> */ #ifndef __X86_MEM_ENCRYPT_H__ #define __X86_MEM_ENCRYPT_H__ #ifndef __ASSEMBLY__ #include <linux/init.h> #include <asm/bootparam.h> #ifdef CONFIG_AMD_MEM_ENCRYPT extern u64 sme_me_mask; extern bool sev_enabled; void sme_encrypt_execute(unsigned long encrypted_kernel_vaddr, unsigned long decrypted_kernel_vaddr, unsigned long kernel_len, unsigned long encryption_wa, unsigned long encryption_pgd); void __init sme_early_encrypt(resource_size_t paddr, unsigned long size); void __init sme_early_decrypt(resource_size_t paddr, unsigned long size); void __init sme_map_bootdata(char *real_mode_data); void __init sme_unmap_bootdata(char *real_mode_data); void __init sme_early_init(void); void __init sme_encrypt_kernel(struct boot_params *bp); void __init sme_enable(struct boot_params *bp); int __init early_set_memory_decrypted(unsigned long vaddr, unsigned long size); int __init early_set_memory_encrypted(unsigned long vaddr, unsigned long size); void __init mem_encrypt_free_decrypted_mem(void); bool sme_active(void); bool sev_active(void); void __init mem_encrypt_init(void); #define __bss_decrypted __attribute__((__section__(".bss..decrypted"))) #else /* !CONFIG_AMD_MEM_ENCRYPT */ #define sme_me_mask 0ULL static inline void __init sme_early_encrypt(resource_size_t paddr, unsigned long size) { } static inline void __init sme_early_decrypt(resource_size_t paddr, unsigned long size) { } static inline void __init sme_map_bootdata(char *real_mode_data) { } static inline void __init sme_unmap_bootdata(char *real_mode_data) { } static inline void __init sme_early_init(void) { } static inline void __init sme_encrypt_kernel(struct boot_params *bp) { } static inline void __init sme_enable(struct boot_params *bp) { } static inline bool sme_active(void) { return false; } static inline bool sev_active(void) { return false; } static inline int __init early_set_memory_decrypted(unsigned long vaddr, unsigned long size) { return 0; } static inline int __init early_set_memory_encrypted(unsigned long vaddr, unsigned long size) { return 0; } static inline void mem_encrypt_init(void) { } #define __bss_decrypted #endif /* CONFIG_AMD_MEM_ENCRYPT */ /* * The __sme_pa() and __sme_pa_nodebug() macros are meant for use when * writing to or comparing values from the cr3 register. Having the * encryption mask set in cr3 enables the PGD entry to be encrypted and * avoid special case handling of PGD allocations. */ #define __sme_pa(x) (__pa(x) | sme_me_mask) #define __sme_pa_nodebug(x) (__pa_nodebug(x) | sme_me_mask) extern char __start_bss_decrypted[], __end_bss_decrypted[], __start_bss_decrypted_unused[]; static inline bool mem_encrypt_active(void) { return sme_me_mask; } static inline u64 sme_get_me_mask(void) { return sme_me_mask; } #endif /* __ASSEMBLY__ */ #endif /* __X86_MEM_ENCRYPT_H__ */
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