linux_dsm_epyc7002/arch/riscv/include/asm/set_memory.h
Atish Patra 73cb8e2a58
RISC-V: Remove unused code from STRICT_KERNEL_RWX
This patch removes the unused functions set_kernel_text_rw/ro.
Currently, it is not being invoked from anywhere and no other architecture
(except arm) uses this code. Even in ARM, these functions are not invoked
from anywhere currently.

Fixes: d27c3c9081 ("riscv: add STRICT_KERNEL_RWX support")
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
2020-05-05 17:02:14 -07:00

41 lines
1.2 KiB
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Copyright (C) 2019 SiFive
*/
#ifndef _ASM_RISCV_SET_MEMORY_H
#define _ASM_RISCV_SET_MEMORY_H
#ifndef __ASSEMBLY__
/*
* Functions to change memory attributes.
*/
#ifdef CONFIG_MMU
int set_memory_ro(unsigned long addr, int numpages);
int set_memory_rw(unsigned long addr, int numpages);
int set_memory_x(unsigned long addr, int numpages);
int set_memory_nx(unsigned long addr, int numpages);
#else
static inline int set_memory_ro(unsigned long addr, int numpages) { return 0; }
static inline int set_memory_rw(unsigned long addr, int numpages) { return 0; }
static inline int set_memory_x(unsigned long addr, int numpages) { return 0; }
static inline int set_memory_nx(unsigned long addr, int numpages) { return 0; }
#endif
int set_direct_map_invalid_noflush(struct page *page);
int set_direct_map_default_noflush(struct page *page);
#endif /* __ASSEMBLY__ */
#ifdef CONFIG_ARCH_HAS_STRICT_KERNEL_RWX
#ifdef CONFIG_64BIT
#define SECTION_ALIGN (1 << 21)
#else
#define SECTION_ALIGN (1 << 22)
#endif
#else /* !CONFIG_ARCH_HAS_STRICT_KERNEL_RWX */
#define SECTION_ALIGN L1_CACHE_BYTES
#endif /* CONFIG_ARCH_HAS_STRICT_KERNEL_RWX */
#endif /* _ASM_RISCV_SET_MEMORY_H */