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 v2 0/1] Add option to disable mte support
Date: Thu, 29 Jul 2021 10:07:11 +0800 [thread overview]
Message-ID: <20210729020717.15142-1-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 Adds an alias in id-reg override mechanism
to suppress the mte feature via passing a param.
=== 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 v2:
- Use id-reg override machanism to suppress feature.
Yee Lee (1):
arm64/cpufeature: Add arm64.nomte to override id-reg
arch/arm64/kernel/idreg-override.c | 2 ++
1 file changed, 2 insertions(+)
--
2.18.0
next reply other threads:[~2021-07-29 2:07 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-29 2:07 yee.lee [this message]
2021-07-29 2:07 ` [PATCH v2 1/1] arm64/cpufeature: Add arm64.nomte to override id-reg yee.lee
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