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Re: [Qemu-devel] [PATCH 0/3] [RFC] Add HAX support

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH 0/3] [RFC] Add HAX support
Date: Tue, 8 Nov 2016 21:41:34 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0

On 08/11/2016 20:41, Vincent Palatin wrote:
> >   If so, I think we should only support those
> > processors and slash all the part related to HAX_EMULATE_STATE_INITIAL
> > and HAX_EMULATE_STATE_REAL.  This would probably let us make patch 3
> > much less intrusive.
> Sure the whole patchset would be lighter, not sure which proportion of
> user have VT machines without UG support though.

All Intel machines sold after ~2010 should have unrestricted guest
support.  (HAX doesn't support AMD, but anyway AMD's virt extensions
have always had the equivalent feature).

I'm not sure we want !UG support at all but, if we do, QEMU 2.9 will
have multithreaded TCG so it would be possible to make it less
intrusive.  So it's worth starting with the minimum patchset and see
what happens.

Thanks for working on this!


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