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From: Paolo Bonzini <pbonzini@redhat.com>
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Date: Fri, 17 Jul 2015 17:30:15 +0200
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Subject: Re: [Qemu-devel] [PATCH 2/2] tcg/i386: Reserve register for
 guest_base if a segment isn't available
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To: Peter Maydell <peter.maydell@linaro.org>, Richard Henderson <rth@twiddle.net>
Cc: Leon Alrae <leon.alrae@imgtec.com>, QEMU Developers <qemu-devel@nongnu.org>, Aurelien Jarno <aurelien@aurel32.net>



On 17/07/2015 03:33, Peter Maydell wrote:
> On 16 July 2015 at 22:25, Richard Henderson <rth@twiddle.net> wrote:
> > This saves 2 insns and 10 bytes from the implementation of
> > each memory operation.
> 
> Do we have an idea of which platforms/configs don't let
> us have a segment register for guest_base?

Everything non-Linux I think, which for user-mode emulation means bsd-user.

Paolo