[PATCH v3 2/4] prtcl: introduce PR_MTE_STORE_ONLY

[Yeoreum Yun <yeoreum.yun@arm.com>]

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

Signed-off-by: Yeoreum Yun <yeoreum.yun@arm.com>
---
 include/uapi/linux/prctl.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/uapi/linux/prctl.h b/include/uapi/linux/prctl.h
index 15c18ef4eb11..83ac566251d8 100644
--- a/include/uapi/linux/prctl.h
+++ b/include/uapi/linux/prctl.h
@@ -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)
-- 
LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}