From 8d91b097335892bfbc9fd5783e80e25f0fb5bb2b Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Thu, 29 Apr 2021 17:10:04 +0200 Subject: [PATCH] riscv: Consistify protect_kernel_linear_mapping_text_rodata() use The various uses of protect_kernel_linear_mapping_text_rodata() are not consistent: - Its definition depends on "64BIT && !XIP_KERNEL", - Its forward declaration depends on MMU, - Its single caller depends on "STRICT_KERNEL_RWX && 64BIT && MMU && !XIP_KERNEL". Fix this by settling on the dependencies of the caller, which can be simplified as STRICT_KERNEL_RWX depends on "MMU && !XIP_KERNEL". Provide a dummy definition, as the caller is protected by "IS_ENABLED(CONFIG_STRICT_KERNEL_RWX)" instead of "#ifdef CONFIG_STRICT_KERNEL_RWX". Signed-off-by: Geert Uytterhoeven Tested-by: Alexandre Ghiti Signed-off-by: Palmer Dabbelt --- arch/riscv/include/asm/set_memory.h | 7 ++++++- arch/riscv/kernel/setup.c | 2 -- arch/riscv/mm/init.c | 2 +- 3 files changed, 7 insertions(+), 4 deletions(-) diff --git a/arch/riscv/include/asm/set_memory.h b/arch/riscv/include/asm/set_memory.h index a9c5677..086f757 100644 --- a/arch/riscv/include/asm/set_memory.h +++ b/arch/riscv/include/asm/set_memory.h @@ -17,7 +17,6 @@ int set_memory_x(unsigned long addr, int numpages); int set_memory_nx(unsigned long addr, int numpages); int set_memory_rw_nx(unsigned long addr, int numpages); void protect_kernel_text_data(void); -void protect_kernel_linear_mapping_text_rodata(void); #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; } @@ -27,6 +26,12 @@ static inline void protect_kernel_text_data(void) {} static inline int set_memory_rw_nx(unsigned long addr, int numpages) { return 0; } #endif +#if defined(CONFIG_64BIT) && defined(CONFIG_STRICT_KERNEL_RWX) +void protect_kernel_linear_mapping_text_rodata(void); +#else +static inline void protect_kernel_linear_mapping_text_rodata(void) {} +#endif + int set_direct_map_invalid_noflush(struct page *page); int set_direct_map_default_noflush(struct page *page); bool kernel_page_present(struct page *page); diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c index 7b317791..03901d3 100644 --- a/arch/riscv/kernel/setup.c +++ b/arch/riscv/kernel/setup.c @@ -293,9 +293,7 @@ void __init setup_arch(char **cmdline_p) if (IS_ENABLED(CONFIG_STRICT_KERNEL_RWX)) { protect_kernel_text_data(); -#if defined(CONFIG_64BIT) && defined(CONFIG_MMU) && !defined(CONFIG_XIP_KERNEL) protect_kernel_linear_mapping_text_rodata(); -#endif } #ifdef CONFIG_SWIOTLB diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c index 1ec98d9..4faf8bd 100644 --- a/arch/riscv/mm/init.c +++ b/arch/riscv/mm/init.c @@ -645,7 +645,7 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa) #endif } -#if defined(CONFIG_64BIT) && !defined(CONFIG_XIP_KERNEL) +#if defined(CONFIG_64BIT) && defined(CONFIG_STRICT_KERNEL_RWX) void protect_kernel_linear_mapping_text_rodata(void) { unsigned long text_start = (unsigned long)lm_alias(_start); -- 2.7.4