From: Nadav Har'El <nyh@math.technion.ac.il>
To: Jan Kiszka <jan.kiszka@siemens.com>
Cc: ????????? <cwndmiao@gmail.com>, kvm@vger.kernel.org, abelg@il.ibm.com
Subject: Re: nested migration issues
Date: Tue, 27 Aug 2013 15:02:39 +0300 [thread overview]
Message-ID: <20130827120239.GA9552@fermat.math.technion.ac.il> (raw)
In-Reply-To: <521C6EF5.2060807@siemens.com>
On Tue, Aug 27, 2013, Jan Kiszka wrote about "Re: nested migration issues":
> > Can anybody tell me whether kvm supports this kind of nested migration
> > or anybody is working on the relating field?
>
> No, KVM does not support migration while nested VMX (or SVM) is enabled.
> We lack userspace interfaces to export/import the required state, and
> that mostly because we do not really know yet what state needs to be
> made available. Specifically nVMX is still under development. Migration
> support will officially follow once we feel we reached a mature state
> with nesting support.
Also check out https://bugzilla.kernel.org/show_bug.cgi?id=53851 for
some earlier ideas about the issue of migrating L1 complete with its
L2s.
> That said, if you want to play with adding such an interface yourself,
> no one will stop you. It may serve as a reference for us what is
> required, but you should not expect it to be merged soon.
>
> BTW, not only migration is broken so far. Even reset does not work while
> VMX is enabled. For the same reason: userspace cannot load a VCPU state
> that resets all VMX states properly.
>
> Jan
>
> --
> Siemens AG, Corporate Technology, CT RTC ITP SES-DE
> Corporate Competence Center Embedded Linux
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--
Nadav Har'El | Tuesday, Aug 27 2013, 21 Elul 5773
nyh@math.technion.ac.il |-----------------------------------------
Phone +972-523-790466, ICQ 13349191 |Committee: A group of people that keeps
http://nadav.harel.org.il |minutes and wastes hours.
next prev parent reply other threads:[~2013-08-27 12:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-27 8:29 nested migration issues 缪天翔
2013-08-27 9:18 ` Jan Kiszka
2013-08-27 12:02 ` Nadav Har'El [this message]
2013-08-27 13:38 ` Kashyap Chamarthy
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