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Re: [Qemu-devel] [PATCH v2 01/23] target-arm: add new CPU feature for Se

From: Christopher Covington
Subject: Re: [Qemu-devel] [PATCH v2 01/23] target-arm: add new CPU feature for Security Extensions
Date: Wed, 21 May 2014 12:14:27 -0400
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130106 Thunderbird/17.0.2

Hi Peter,

On 05/21/2014 10:46 AM, Peter Maydell wrote:
> On 13 May 2014 17:15, Fabian Aggeler <address@hidden> wrote:
>> From: Svetlana Fedoseeva <address@hidden>
>> Define Security Extensions CPU feature. Set that feature for relevant CPUs.
> This is potentially tricky because it means that CPUs which we were
> previously implementing without TZ now boot up with TZ and in
> Secure mode; I think this is probably the right thing but we'll need
> to check that we don't break guests which were really expecting
> to run in NS.
> (Also I'm not sure what the semantics of -kernel should be for
> TZ-supporting CPUs -- boot the kernel in S or NS ?)

While Linux works in secure mode, non-secure hypervisor mode is required for
KVM to work in the guest.

"[Entry] in HYP mode ... is the recommended boot method ...."



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