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Re: [Qemu-devel] [PATCH v2 3/3] arm: implement query-gic-capability

From: Peter Xu
Subject: Re: [Qemu-devel] [PATCH v2 3/3] arm: implement query-gic-capability
Date: Mon, 7 Mar 2016 12:27:25 +0800
User-agent: Mutt/1.5.24 (2015-08-30)

On Fri, Mar 04, 2016 at 09:43:24AM +0100, Andrea Bolognani wrote:
> On Fri, 2016-03-04 at 10:52 +0800, Peter Xu wrote:
> > Andrea, do you know how much effort we need to add this support for
> > libvirt, say, we can specify "accel=" or "-enable-kvm" as extra
> > parameter when probing?
> I'm afraid this is not going to be possible for the same reason
> we have to use '-M none' when probing: at that point in time, we
> simply have no idea what the guests will look like. Actually,
> it's the other way around, in that the result of probing (host
> and domain capabilities) will influence the guest configuration
> created by the user / management tool.
> And we definitely can't use 'accel=kvm' unconditionally, because
> then we won't be able to probe eg. the qemu-system-aarch64 binary
> installed on a x86_64 host.

Agreed. It is awkward to specify these for probing.

Posting v3 to allow it work even without kvm enabled. I am using the
hacky way to do it since I still have no better way to do it. Let's
see whether we can get more review comments on that.


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