linux-kernel - Re: [PATCH v2 00/16] arm64: Add SMCCC v1.1 support and CVE-2017-5715 (Spectre variant 2) mitigation

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Message-ID: <f6da84f8-b01e-f8cd-521b-6f2348b963be@jonmasters.org>
Date:   Sat, 9 Jun 2018 09:22:27 -0400
From:   Jon Masters <jcm@...masters.org>
To:     Marc Zyngier <marc.zyngier@....com>, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu
Cc:     Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Peter Maydell <peter.maydell@...aro.org>,
        Christoffer Dall <christoffer.dall@...aro.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Mark Rutland <mark.rutland@....com>,
        Robin Murphy <robin.murphy@....com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Jon Masters <jcm@...hat.com>
Subject: Re: [PATCH v2 00/16] arm64: Add SMCCC v1.1 support and CVE-2017-5715
 (Spectre variant 2) mitigation

Hi Marc,

On 01/29/2018 12:45 PM, Marc Zyngier wrote:

> ARM has recently published a SMC Calling Convention (SMCCC)
> specification update[1] that provides an optimised calling convention
> and optional, discoverable support for mitigating CVE-2017-5715. ARM
> Trusted Firmware (ATF) has already gained such an implementation[2].

Some questions:

1). What's the plan to implement the boot time on/off control for
spectre_v2 mitigations?

2). What's the plan to handle live migration of VMs?

Jon.