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Re: [Qemu-devel] [PATCH] target-arm: Added CP15 VBAR support

From: Peter Maydell
Subject: Re: [Qemu-devel] [PATCH] target-arm: Added CP15 VBAR support
Date: Wed, 26 Jun 2013 09:51:26 +0100

On 26 June 2013 02:57, Peter Crosthwaite <address@hidden> wrote:
> On Wed, Feb 27, 2013 at 8:10 PM, Peter Maydell <address@hidden> wrote:
>> This one's tricky because the VBAR only exists in CPUs with
>> TrustZone, and strictly speaking QEMU models a non-TrustZone
>> core. However we already have some dummy cp15 registers which
>> are really TZ-only just to get guests working, and this may
>> well fall into that category.
>> I need to have a think about how we can coherently define
>> what QEMU does about TZ so we can have a better idea of
>> what should and shouldn't be implemented. (If you have any
>> suggestions I'm open to them.)

Yes, but what should this imply about QEMU's behaviour?
Naming a feature switch is easy, semantics are hard.

-- PMM

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