From: Srinivas Ramana <sramana@codeaurora.org>
To: catalin.marinas@arm.com, will@kernel.org, pajay@qti.qualcomm.com
Cc: linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
linux-arm-msm@vger.kernel.org,
Srinivas Ramana <sramana@codeaurora.org>
Subject: [PATCH 0/3] arm64: cpufeature: Add filter function to control
Date: Fri, 8 Jan 2021 16:29:20 -0800 [thread overview]
Message-ID: <1610152163-16554-1-git-send-email-sramana@codeaurora.org> (raw)
This patchset adds a control function for cpufeature framework
so that the feature can be controlled at runtime.
Defer PAC on boot core and use the filter function added to disable
PAC from command line. This will help toggling the feature on systems
that do not support PAC or where PAC needs to be disabled at runtime,
without modifying the core kernel.
The idea of adding the filter function for cpufeature is taken from
https://lore.kernel.org/linux-arm-kernel/20200515171612.1020-25-catalin.marinas@arm.com/
https://lore.kernel.org/linux-arm-kernel/20200515171612.1020-24-catalin.marinas@arm.com/
Srinivas Ramana (3):
arm64: Defer enabling pointer authentication on boot core
arm64: cpufeature: Add a filter function to cpufeature
arm64: Enable control of pointer authentication using early param
Documentation/admin-guide/kernel-parameters.txt | 6 +++
arch/arm64/include/asm/cpufeature.h | 8 +++-
arch/arm64/include/asm/pointer_auth.h | 10 +++++
arch/arm64/include/asm/stackprotector.h | 1 +
arch/arm64/kernel/cpufeature.c | 53 +++++++++++++++++++------
arch/arm64/kernel/head.S | 4 --
6 files changed, 64 insertions(+), 18 deletions(-)
--
2.7.4
next reply other threads:[~2021-01-09 0:31 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-09 0:29 Srinivas Ramana [this message]
2021-01-09 0:29 ` [PATCH 1/3] arm64: Defer enabling pointer authentication on boot core Srinivas Ramana
2021-01-09 0:29 ` [PATCH 2/3] arm64: cpufeature: Add a filter function to cpufeature Srinivas Ramana
2021-01-09 0:29 ` [PATCH 3/3] arm64: Enable control of pointer authentication using early param Srinivas Ramana
2021-01-11 13:40 ` [PATCH 0/3] arm64: cpufeature: Add filter function to control Marc Zyngier
2021-01-14 7:15 ` Srinivas Ramana
2021-01-14 8:20 ` Marc Zyngier
2021-01-14 18:37 ` Catalin Marinas
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