From: Marc Zyngier <marc.zyngier@arm.com>
To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: Jeremy Linton <jeremy.linton@arm.com>,
Will Deacon <will.deacon@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>
Subject: [PATCH v2 0/2] Spectre-v2 detection fixes
Date: Mon, 14 Jan 2019 10:35:26 +0000 [thread overview]
Message-ID: <20190114103528.52931-1-marc.zyngier@arm.com> (raw)
These two patches, now built on top of Jeremy's sysfs series, tweak
the way we detect the Spectre-v2 vulnerability by switching from a
blacklist to a whitelist, making sure we correctly detect unmitigated
systems.
We further improve things by relying on firmware to tell us about CPUs
that are part of an affected system, but that are not affected
themselves (big-little type).
For convenience, I've pushed out a branch containing both Jeremy's v3
series and these patches at [1].
[1] git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git arm64/spectre-sysfs
Marc Zyngier (2):
arm64: Advertise mitigation of Spectre-v2, or lack thereof
arm64: Use firmware to detect CPUs that are not affected by Spectre-v2
arch/arm64/kernel/cpu_errata.c | 141 +++++++++++++++++----------------
1 file changed, 73 insertions(+), 68 deletions(-)
--
2.20.1
next reply other threads:[~2019-01-14 10:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-14 10:35 Marc Zyngier [this message]
2019-01-14 10:35 ` [PATCH v2 1/2] arm64: Advertise mitigation of Spectre-v2, or lack thereof Marc Zyngier
2019-01-14 17:06 ` Jeremy Linton
2019-01-14 10:35 ` [PATCH v2 2/2] arm64: Use firmware to detect CPUs that are not affected by Spectre-v2 Marc Zyngier
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