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Re: [Qemu-devel] [PATCH 2/2] target-arm: Add "anyvfp" CPU

From: Peter Maydell
Subject: Re: [Qemu-devel] [PATCH 2/2] target-arm: Add "anyvfp" CPU
Date: Mon, 6 Jul 2015 23:31:37 +0100

On 6 July 2015 at 19:53,  <address@hidden> wrote:
> From: Meador Inge <address@hidden>
> This patch adds support for `-cpu anyvfp`, which is just
> like `-cpu any`, but enables the coprocessors by default.
> This is useful for working with a wide range of bare-metal
> C/C++ applications that have been compiled in different
> ways and assume the coprocessor has been enabled already.

I'm not convinced. System mode gives you a bare metal
system -- it's the bare metal app's job to enable
VFP if it wants to use it. If your bare metal app
doesn't do that then it is broken.

Alternatively you can use a firmware blob which
does enough setup for whatever environment your
code is expecting.

I really don't want to get QEMU into the business of
providing random ad-hoc execution environments for
things. It's hard enough maintaining the Linux boot
loader code...

-- PMM

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