Re: stand-alone kvmtool

From: Claudio Fontana <claudio.fontana@huawei.com>
To: Andre Przywara <andre.przywara@arm.com>,
	Pekka Enberg <penberg@kernel.org>,
	Sasha Levin <sasha.levin@oracle.com>,
	Cyrill Gorcunov <gorcunov@gmail.com>,
	Asias He <asias.hejun@gmail.com>
Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
	Marc Zyngier <Marc.Zyngier@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Ronald Minnich <rminnich@google.com>,
	"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: stand-alone kvmtool
Date: Fri, 13 Feb 2015 15:30:52 +0100	[thread overview]
Message-ID: <54DE0A9C.7080505@huawei.com> (raw)
In-Reply-To: <54DDD465.3050300@arm.com>

Hello Andre,

On 13.02.2015 11:39, Andre Przywara wrote:
> Hi,
> 
> as I found it increasingly inconvenient to use kvmtool[1] as part of a
> Linux repository, I decided to give it a go and make it a stand-alone
> project. So I filtered all the respective commits, adjusted the paths in
> there (while keeping authorship and commit date, of course) and then
> added the missing bits to let it compile without a kernel tree nearby.
> The result is now available on:
> 
> git://linux-arm.org/kvmtool.git
> http://linux-arm.org/kvmtool.git

It builds fine on x86_64, but when I tried to crosscompile from x86_64 to AArch64,
I get in trouble because of libfdt: I have the aarch64 libs (static and shared), but how do I instruct the build system to get it from the right place?

Thanks,

Claudio

> 
> You can simply check it out, type make and use "./lkvm run" for a quick
> test. So far I briefly tested x86-64, arm and arm64, the later two were
> also cross-compiled. For sure there are rough edges in there (for
> instance copying a few non-uapi header files into), but I deem it worthy
> enough to get some public comments.
> For me that also fixed some nasty warnings about libfdt, which now are
> gone due it using your system library version of it.
> I also managed to get rid of the libc-i386-dev dependency when compiling
> for x86-64, but that still needs to be cleaned up and thus is not in the
> current HEAD.
> I haven't got around to compile-test the other supported architectures,
> but supporting them should be as easy as copying over the uapi kvm.h
> header file (see the respective ARM commit). Contributions (and tests!)
> are welcome.
> 
> Please give it a go and tell me what you think. I don't want to fork the
> project, so I am happy if someone "official" picks it up.
> 
> Cheers,
> Andre.
> 
> [1] https://github.com/penberg/linux-kvm/tree/master/tools/kvm
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> 

-- 
Claudio Fontana
Server Virtualization Architect
Huawei Technologies Duesseldorf GmbH
Riesstraße 25 - 80992 München

office: +49 89 158834 4135
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