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Re: [Qemu-devel] how to handle QOM 'container' objects whose contents de

From: Paolo Bonzini
Subject: Re: [Qemu-devel] how to handle QOM 'container' objects whose contents depend on QOM properties?
Date: Wed, 7 Feb 2018 17:38:21 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.5.2

On 07/02/2018 17:22, Peter Maydell wrote:
>> Just to understand the context better, when you buy a SoC (presumably as
>> IP) can you also configure it to hardwire different CPU config signals?
> Usually if you buy an SoC you're buying the silicon, not
> the IP. I think the usual case is that the SoC ties the
> CPU config signals to 0 or 1 (part of the SoC designer's
> job is configuring the semi-configurable bits of IP the
> way they want when they put them all together). It would
> certainly be in theory possible for the SoC to instead
> route those signals out to pins on the SoC for the board
> to tie off, but my impression is that's not a likely design
> choice.

Yeah, that's why I was wondering if buying an SoC as configurable IP was
a thing at all.  In that case, I would just make things less
configurable and, if needed, hack the configurability with -global.


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