From: Jamie Lokier <jamie-yetKDKU6eevNLxjTenLetw@public.gmane.org>
To: qemu-devel-qX2TKyscuCcdnm+yROfE0A@public.gmane.org
Cc: kvm-devel <kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
Subject: Re: [Qemu-devel] Re: expose host CPU features to guests
Date: Mon, 10 Sep 2007 17:53:36 +0100 [thread overview]
Message-ID: <20070910165336.GA1825@mail.shareable.org> (raw)
In-Reply-To: <200709091712.15743.paul-qD8j1LwMmJjtCj0u4l0SBw@public.gmane.org>
Paul Brook wrote:
> > > What you really want to do is ask your virtualization module what
> > > features it supports.
> >
> > Yes, that needs to be an additional filter.
>
> I'd have thought that would be the *only* interesting set for autodetection.
If that means the same as the features which are efficient for the
guest, then I agree. If there's a difference, I'd have thought you'd
normally want the guest to use only those features which work at
near-native performance, not those which involve a trap and long path
through the virtualisation/emulation, even if they're supported. No
example comes to mind, but that seems like the principle to go for, to
me.
-- Jamie
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next prev parent reply other threads:[~2007-09-10 16:53 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-05 17:45 expose host CPU features to guests danken-atKUWr5tajBWk0Htik3J/w
[not found] ` <20070905174530.GA3945-iWbx9bcAnq+Hk9JtIoIkgNBPR1lH4CV8@public.gmane.org>
2007-09-05 19:26 ` Anthony Liguori
2007-09-05 19:34 ` Avi Kivity
[not found] ` <46DF04D5.5000807-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-09-05 19:44 ` Daniel P. Berrange
[not found] ` <20070905194448.GN5503-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2007-09-06 0:30 ` [Qemu-devel] " Paul Brook
2007-09-06 8:46 ` Re: [kvm-devel] " Avi Kivity
2007-09-07 10:47 ` [Qemu-devel] " Jamie Lokier
[not found] ` <20070907104738.GA14723-tp2ajI7sM85Y6zH9YvfY1x2eb7JE58TQ@public.gmane.org>
2007-09-09 7:51 ` Avi Kivity
[not found] ` <46E3A618.7030505-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-09-09 12:47 ` Jamie Lokier
[not found] ` <20070909124718.GE24240-tp2ajI7sM85Y6zH9YvfY1x2eb7JE58TQ@public.gmane.org>
2007-09-09 12:55 ` Avi Kivity
[not found] ` <46E3ED2B.6080606-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-09-09 13:07 ` Jamie Lokier
2007-09-09 13:14 ` [kvm-devel] " Avi Kivity
[not found] ` <20070909130725.GF24240-tp2ajI7sM85Y6zH9YvfY1x2eb7JE58TQ@public.gmane.org>
2007-09-09 15:25 ` [Qemu-devel] " Paul Brook
2007-09-09 15:29 ` [kvm-devel] " Avi Kivity
2007-09-09 15:47 ` Jamie Lokier
2007-09-09 16:12 ` Paul Brook
[not found] ` <200709091712.15743.paul-qD8j1LwMmJjtCj0u4l0SBw@public.gmane.org>
2007-09-09 16:38 ` [Qemu-devel] " Avi Kivity
2007-09-10 16:53 ` Jamie Lokier [this message]
2007-09-10 7:40 ` expose host CPU features to guests: Take 2 Dan Kenigsberg
[not found] ` <20070910074005.GA26869-iWbx9bcAnq+Hk9JtIoIkgNBPR1lH4CV8@public.gmane.org>
2007-09-24 17:41 ` expose host CPU features to guests: Take 3 Dan Kenigsberg
[not found] ` <20070924174129.GA4507-iWbx9bcAnq+Hk9JtIoIkgNBPR1lH4CV8@public.gmane.org>
2007-09-25 1:28 ` [Qemu-devel] " andrzej zaborowski
[not found] ` <fb249edb0709241828pb6b9fd4v1d1d8d4a3495f040-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2007-09-25 8:48 ` Dan Kenigsberg
[not found] ` <20070925084842.GA14221-iWbx9bcAnq+Hk9JtIoIkgNBPR1lH4CV8@public.gmane.org>
2007-09-25 9:01 ` Avi Kivity
[not found] ` <46F8CE52.3080502-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-09-25 9:19 ` J. Mayer
2007-09-25 9:31 ` Avi Kivity
[not found] ` <46F8D577.3020306-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-09-25 10:40 ` Avi Kivity
[not found] ` <46F8E5A2.30906-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-09-25 11:09 ` J. Mayer
2007-09-25 11:36 ` Avi Kivity
[not found] ` <46F8F2B8.1080203-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-09-25 12:05 ` Fabrice Bellard
2007-09-25 13:07 ` Jocelyn Mayer
[not found] ` <1190725664.13490.14.camel-JEa2SU7BmVsPEyPTZiGI+UEOCMrvLtNR@public.gmane.org>
2007-09-25 13:12 ` Avi Kivity
2007-09-25 13:27 ` Dan Kenigsberg
2007-09-25 12:51 ` Paul Brook
[not found] ` <200709251351.55481.paul-qD8j1LwMmJjtCj0u4l0SBw@public.gmane.org>
2007-09-25 13:13 ` Avi Kivity
2007-10-07 12:38 ` x86 -cpu option: Take 4 Dan Kenigsberg
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