From: Shanker Donthineni <shankerd@codeaurora.org>
To: Will Deacon <will.deacon@arm.com>
Cc: Vikram Sethi <vikrams@codeaurora.org>,
Sean Campbell <scampbel@codeaurora.org>,
Marc Zyngier <marc.zyngier@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
kvmarm <kvmarm@lists.cs.columbia.edu>,
Christoffer Dall <christoffer.dall@linaro.org>
Subject: Re: [PATCH] arm64: Implement branch predictor hardening for Falkor
Date: Mon, 8 Jan 2018 13:10:39 -0600 [thread overview]
Message-ID: <01fe1f41-ac45-0c19-a502-77b915c48fcf@codeaurora.org> (raw)
In-Reply-To: <20180108184446.GC13175@arm.com>
Hi Will,
On 01/08/2018 12:44 PM, Will Deacon wrote:
> On Mon, Jan 08, 2018 at 05:09:33PM +0000, Will Deacon wrote:
>> On Fri, Jan 05, 2018 at 02:28:59PM -0600, Shanker Donthineni wrote:
>>> Falkor is susceptible to branch predictor aliasing and can
>>> theoretically be attacked by malicious code. This patch
>>> implements a mitigation for these attacks, preventing any
>>> malicious entries from affecting other victim contexts.
>>
>> Thanks, Shanker. I'll pick this up (fixing the typo pointed out by Drew).
>
> Note that MIDR_FALKOR doesn't exist in mainline, so I had to drop those
> changes too. See the kpti branch for details.
>
The FALKOR MIDR patch is already available in the upstream kernel v4.15-rc7
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/arch/arm64?h=v4.15-rc7&id=c622cc013cece073722592cff1ac6643a33b1622
If you want I can resend the above patch in v2 series including typo fix.
> If you'd like anything else done here, please send additional patches to me
> and Catalin that we can apply on top of what we currently have. Note that
> I'm in the air tomorrow, so won't be picking up email.
>
> Cheers,
>
> Will
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
--
Shanker Donthineni
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.
next prev parent reply other threads:[~2018-01-08 19:10 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-05 20:28 [PATCH] arm64: Implement branch predictor hardening for Falkor Shanker Donthineni
2018-01-08 9:28 ` Andrew Jones
2018-01-08 17:22 ` Shanker Donthineni
2018-01-08 17:09 ` Will Deacon
2018-01-08 18:44 ` Will Deacon
2018-01-08 19:10 ` Shanker Donthineni [this message]
2018-01-08 21:44 ` Shanker Donthineni
2018-01-09 9:41 ` Will Deacon
2018-01-09 11:05 ` Catalin Marinas
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