mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-29 13:53:33 +00:00
4867fbbdd6
This moves protection_map[] inside the platform and makes it a static. This also defines a helper function add_encrypt_protection_map() that can update the protection_map[] array with pgprot_encrypted(). Link: https://lkml.kernel.org/r/20220711070600.2378316-7-anshuman.khandual@arm.com Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Brian Cain <bcain@quicinc.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Christoph Hellwig <hch@infradead.org> Cc: Chris Zankel <chris@zankel.net> Cc: "David S. Miller" <davem@davemloft.net> Cc: Dinh Nguyen <dinguyen@kernel.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Guo Ren <guoren@kernel.org> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: "James E.J. Bottomley" <James.Bottomley@HansenPartnership.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Jonas Bonn <jonas@southpole.se> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Simek <monstr@monstr.eu> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Paul Walmsley <paul.walmsley@sifive.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Rich Felker <dalias@libc.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Stafford Horne <shorne@gmail.com> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Vasily Gorbik <gor@linux.ibm.com> Cc: Vineet Gupta <vgupta@kernel.org> Cc: WANG Xuerui <kernel@xen0n.name> Cc: Will Deacon <will@kernel.org> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
/* 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_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, int npages,
|
|
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
|
|
|
|
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, int npages, bool enc) {}
|
|
|
|
static inline void mem_encrypt_free_decrypted_mem(void) { }
|
|
|
|
#define __bss_decrypted
|
|
|
|
#endif /* CONFIG_AMD_MEM_ENCRYPT */
|
|
|
|
/* Architecture __weak replacement functions */
|
|
void __init mem_encrypt_init(void);
|
|
|
|
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__ */
|