From: Greg KH <gregkh@linuxfoundation.org>
To: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org, will@kernel.org,
stable@vger.kernel.org, sashal@kernel.org,
Will Deacon <will.deacon@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
open list <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH stable 4.9] arm64: kpti: Whitelist Cortex-A CPUs that don't implement the CSV3 field
Date: Tue, 28 Jan 2020 09:08:07 +0100 [thread overview]
Message-ID: <20200128080807.GJ2105706@kroah.com> (raw)
In-Reply-To: <20200124200820.18272-1-f.fainelli@gmail.com>
On Fri, Jan 24, 2020 at 12:08:20PM -0800, Florian Fainelli wrote:
> From: Will Deacon <will.deacon@arm.com>
>
> commit 2a355ec25729053bb9a1a89b6c1d1cdd6c3b3fb1 upstream.
>
> While the CSV3 field of the ID_AA64_PFR0 CPU ID register can be checked
> to see if a CPU is susceptible to Meltdown and therefore requires kpti
> to be enabled, existing CPUs do not implement this field.
>
> We therefore whitelist all unaffected Cortex-A CPUs that do not implement
> the CSV3 field.
>
> Signed-off-by: Will Deacon <will.deacon@arm.com>
> [florian: adjust whilelist location and table to stable-4.9.y]
> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Thanks for the backport, now applied.
greg k-h
prev parent reply other threads:[~2020-01-28 8:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-24 20:08 Florian Fainelli
2020-01-28 8:08 ` Greg KH [this message]
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