Re: [PATCH v2 00/16] arm64: Add SMCCC v1.1 support and CVE-2017-5715 (Spectre variant 2) mitigation
From: Marc Zyngier
Date: Sat Jun 09 2018 - 10:07:00 EST
On Sat, 09 Jun 2018 14:22:27 +0100,
Jon Masters wrote:
> Hi Marc,
> On 01/29/2018 12:45 PM, Marc Zyngier wrote:
> > ARM has recently published a SMC Calling Convention (SMCCC)
> > specification update 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.
> Some questions:
> 1). What's the plan to implement the boot time on/off control for
> spectre_v2 mitigations?
None so far. It can only be disabled at compile time.
> 2). What's the plan to handle live migration of VMs?
[I assume that by "migration of VMs, you actually mean migration of
the mitigation state]
As I mentioned in response to your comment on the variant-4 series,
this is a work in progress, and is mentioned in the cover letter of
that series. Hopefully I'll find time to work on it next week.
Jazz is not dead, it just smell funny.