linux-kernel - [PATCH v2 0/1] Add option to disable mte support

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Date:   Thu, 29 Jul 2021 10:07:11 +0800
From:   <yee.lee@...iatek.com>
To:     <linux-kernel@...r.kernel.org>
CC:     <nicholas.Tang@...iatek.com>, <Kuan-Ying.lee@...iatek.com>,
        <chinwen.chang@...iatek.com>, Yee Lee <yee.lee@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-arm-kernel@...ts.infradead.org>,
        "moderated list:ARM/Mediatek SoC support" 
        <linux-mediatek@...ts.infradead.org>
Subject: [PATCH v2 0/1] Add option to disable mte support

From: Yee Lee <yee.lee@...iatek.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