Commit bfbbb0d3 authored by Huang Shijie's avatar Huang Shijie Committed by Will Deacon
Browse files

arm64/Kconfig: Remove CONFIG_RODATA_FULL_DEFAULT_ENABLED 



Now that 'rodata=full' has been removed in favour of parity with x86,
CONFIG_RODATA_FULL_DEFAULT_ENABLED no longer serves a useful purpose.

Remove it.

Reviewed-by: default avatarAnshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: default avatarHuang Shijie <shijie@os.amperecomputing.com>
Signed-off-by: default avatarWill Deacon <will@kernel.org>
parent c0f303d7

arch/arm64/Kconfig

+0 −14
Original line number Diff line number Diff line
@@ -1698,20 +1698,6 @@ config MITIGATE_SPECTRE_BRANCH_HISTORY 
	  When taking an exception from user-space, a sequence of branches

	  or a firmware call overwrites the branch history.



config RODATA_FULL_DEFAULT_ENABLED

	bool "Apply r/o permissions of VM areas also to their linear aliases"

	default y

	help

	  Apply read-only attributes of VM areas to the linear alias of

	  the backing pages as well. This prevents code or read-only data

	  from being modified (inadvertently or intentionally) via another

	  mapping of the same memory page. This additional enhancement can

	  be turned off at runtime by passing rodata=[off|on] (and turned on

	  with rodata=full if this option is set to 'n')



	  This requires the linear region to be mapped down to pages,

	  which may adversely affect performance in some cases.



config ARM64_SW_TTBR0_PAN

	bool "Emulate Privileged Access Never using TTBR0_EL1 switching"

	depends on !KCSAN

arch/arm64/mm/pageattr.c

+1 −1
Original line number Diff line number Diff line
@@ -20,7 +20,7 @@ struct page_change_data { 
	pgprot_t clear_mask;

};



bool rodata_full __ro_after_init = IS_ENABLED(CONFIG_RODATA_FULL_DEFAULT_ENABLED);

bool rodata_full __ro_after_init = true;



bool can_set_direct_map(void)

{