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prctl: Introduce PR_MTE_STORE_ONLY

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

Signed-off-by: Yeoreum Yun <[email protected]>
Reviewed-by: Mark Brown <[email protected]>
Tested-by: Mark Brown <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
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Yeoreum Yun authored and Catalin Marinas committed 2025-07-02 18:49:03 +01:00
1 parent 33e943a228
commit b1fabef37b
1 file changed
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include/uapi/linux/prctl.h
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@@ -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)