From 40982fd6b975de4a51ce5147bc1d698c3b075634 Mon Sep 17 00:00:00 2001 From: Mark Rutland Date: Thu, 25 Aug 2016 17:23:23 +0100 Subject: arm64: always enable DEBUG_RODATA and remove the Kconfig option Follow the example set by x86 in commit 9ccaf77cf05915f5 ("x86/mm: Always enable CONFIG_DEBUG_RODATA and remove the Kconfig option"), and make these protections a fundamental security feature rather than an opt-in. This also results in a minor code simplification. For those rare cases when users wish to disable this protection (e.g. for debugging), this can be done by passing 'rodata=off' on the command line. As DEBUG_RODATA_ALIGN is only intended to address a performance/memory tradeoff, and does not affect correctness, this is left user-selectable. DEBUG_MODULE_RONX is also left user-selectable until the core code provides a boot-time option to disable the protection for debugging use-cases. Cc: Catalin Marinas Acked-by: Ard Biesheuvel Acked-by: Kees Cook Acked-by: Laura Abbott Signed-off-by: Mark Rutland Signed-off-by: Will Deacon --- arch/arm64/Kconfig | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/arm64/Kconfig') diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 9be0c164df4e..1e49fbc4b075 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -122,6 +122,9 @@ config ARCH_PHYS_ADDR_T_64BIT config MMU def_bool y +config DEBUG_RODATA + def_bool y + config ARM64_PAGE_SHIFT int default 16 if ARM64_64K_PAGES -- cgit v1.2.3