[PATCH v3 0/1] arm64/cpufeature: Support optionally disable MTE

yee.lee
2021-07-30T14:50:29Z

From: Yee Lee <yee.lee@mediatek.com>

For some case of low-end devices with limited resources,
an option to disable MTE support is necessary.

This patch supoorts to override id-reg on the
shadow capability via comandline and suppress MTE feature.

=== Test ===
QEMU5.2 + MTE
passed "arm64.nomte" in cmdline
boot log:
..(skip)
[ 0.000000] CPU features: SYS_ID_AA64PFR1_EL1[11:8]: forced to 0

Changed since v3:
- Add documentation text

Changed since v2:
- Use id-reg override machanism to suppress feature.

Yee Lee (1):
arm64/cpufeature: Optionally disable MTE via command-line

Documentation/admin-guide/kernel-parameters.txt | 3 +++
arch/arm64/kernel/idreg-override.c | 2 ++
2 files changed, 5 insertions(+)

--
2.18.0