Commit b1fabef3 authored by Yeoreum Yun's avatar Yeoreum Yun Committed by Catalin Marinas
Browse files

prctl: Introduce PR_MTE_STORE_ONLY 



PR_MTE_STORE_ONLY is used to restrict the MTE tag check for store
opeartion only.

Signed-off-by: default avatarYeoreum Yun <yeoreum.yun@arm.com>
Reviewed-by: default avatarMark Brown <broonie@kernel.org>
Tested-by: default avatarMark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20250618092957.2069907-3-yeoreum.yun@arm.com


Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 33e943a2

include/uapi/linux/prctl.h

+2 −0
Original line number Diff line number Diff line
@@ -244,6 +244,8 @@ struct prctl_mm_map { 
# define PR_MTE_TAG_MASK		(0xffffUL << PR_MTE_TAG_SHIFT)

/* Unused; kept only for source compatibility */

# define PR_MTE_TCF_SHIFT		1

/* MTE tag check store only */

# define PR_MTE_STORE_ONLY		(1UL << 19)

/* RISC-V pointer masking tag length */

# define PR_PMLEN_SHIFT			24

# define PR_PMLEN_MASK			(0x7fUL << PR_PMLEN_SHIFT)