From: <yee.lee@mediatek.com>
To: <linux-kernel@vger.kernel.org>
Cc: <nicholas.Tang@mediatek.com>, <Kuan-Ying.lee@mediatek.com>,
<chinwen.chang@mediatek.com>, Yee Lee <yee.lee@mediatek.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
"moderated list:ARM/Mediatek SoC support"
<linux-arm-kernel@lists.infradead.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@lists.infradead.org>
Subject: [PATCH v3 0/1] arm64/cpufeature: Support optionally disable MTE
Date: Fri, 30 Jul 2021 22:49:52 +0800 [thread overview]
Message-ID: <20210730144957.30938-1-yee.lee@mediatek.com> (raw)
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
next reply other threads:[~2021-07-30 14:50 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-30 14:49 yee.lee [this message]
2021-07-30 14:49 ` [PATCH v3 1/1] arm64/cpufeature: Optionally disable MTE via command-line yee.lee
2021-08-02 15:30 ` Catalin Marinas
2021-08-03 5:55 ` Yee Lee
2021-11-25 10:19 ` Yee Lee
2021-12-03 16:33 ` Catalin Marinas
2021-12-14 8:19 ` Yee Lee
2021-12-14 12:02 ` Catalin Marinas
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