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Re: [Qemu-devel] [PATCH 3/3] PPC PReP: can run without bios image


From: Alexander Graf
Subject: Re: [Qemu-devel] [PATCH 3/3] PPC PReP: can run without bios image
Date: Sat, 6 Apr 2013 13:38:52 +0200

On 06.04.2013, at 13:27, Peter Maydell wrote:

> On 6 April 2013 10:07, Alexander Graf <address@hidden> wrote:
>> On ARM, look at highbank. Because we're not running we're lacking
>> a monitor mode blob that provides sys calls for flushing caches.
>> Thus today the highbank machine doesn't boot anymore with Linux.
>> If we ran firmware like the real board, that would provide for the
>> sys call.
> 
> We also flat out don't implement enough monitor mode to allow
> a hypothetical firmware blob to work.

Why don't we implement enough monitor mode? Because we're not running firmware 
:). It's a chicken and egg thing. Bottom line is that Linux validly expects 
that firmware exists. If we don't run firmware, we diverge, thus we potentially 
break.


Alex




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