diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/x86/include/asm/mem_encrypt.h | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/include/asm/mem_encrypt.h')
-rw-r--r-- | arch/x86/include/asm/mem_encrypt.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/arch/x86/include/asm/mem_encrypt.h b/arch/x86/include/asm/mem_encrypt.h new file mode 100644 index 0000000000..473b16d73b --- /dev/null +++ b/arch/x86/include/asm/mem_encrypt.h @@ -0,0 +1,116 @@ +/* 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 <linux/cc_platform.h> + +#include <asm/bootparam.h> + +#ifdef CONFIG_X86_MEM_ENCRYPT +void __init mem_encrypt_init(void); +#else +static inline void mem_encrypt_init(void) { } +#endif + +#ifdef CONFIG_AMD_MEM_ENCRYPT + +extern u64 sme_me_mask; +extern u64 sev_status; + +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 sev_setup_arch(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 early_set_mem_enc_dec_hypercall(unsigned long vaddr, + unsigned long size, bool enc); + +void __init mem_encrypt_free_decrypted_mem(void); + +void __init sev_es_init_vc_handling(void); + +#define __bss_decrypted __section(".bss..decrypted") + +#else /* !CONFIG_AMD_MEM_ENCRYPT */ + +#define sme_me_mask 0ULL +#define sev_status 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 sev_setup_arch(void) { } + +static inline void __init sme_encrypt_kernel(struct boot_params *bp) { } +static inline void __init sme_enable(struct boot_params *bp) { } + +static inline void sev_es_init_vc_handling(void) { } + +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 __init +early_set_mem_enc_dec_hypercall(unsigned long vaddr, unsigned long size, bool enc) {} + +static inline void mem_encrypt_free_decrypted_mem(void) { } + +#define __bss_decrypted + +#endif /* CONFIG_AMD_MEM_ENCRYPT */ + +void add_encrypt_protection_map(void); + +/* + * 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 u64 sme_get_me_mask(void) +{ + return sme_me_mask; +} + +#endif /* __ASSEMBLY__ */ + +#endif /* __X86_MEM_ENCRYPT_H__ */ |