Date: Sun, 9 Jan 2011 12:00:22 +0100 From: Juergen Lock <nox@jelal.kn-bremen.de> To: Brandon Gooch <jamesbrandongooch@gmail.com> Cc: freebsd-emulation@freebsd.org, Xiaodong Yi <xdong.yi@gmail.com>, Juergen Lock <nox@jelal.kn-bremen.de> Subject: Re: Testing Luvalley with FreeBSD as dom0 Message-ID: <20110109110022.GA10789@triton8.kn-bremen.de> In-Reply-To: <AANLkTikbuWJbtPYaLW=8BEH4f5oiumzEN6rgwOB5tC=R@mail.gmail.com> References: <20100418191752.GA72730@triton8.kn-bremen.de> <w2r3b0605b31004181554tb90de59u6df8ebd5b1206caa@mail.gmail.com> <AANLkTi=nhk%2BeCG6kbe4LfeaTQWkKaVcr%2BRx2LrKparDO@mail.gmail.com> <20110107194516.GA28544@triton8.kn-bremen.de> <AANLkTikvP8SezKEZYSUimaj3u8fkk2Vw6-aY09KV=RF3@mail.gmail.com> <20110107213643.GA32645@triton8.kn-bremen.de> <AANLkTi=2Nn8xeKudxb2uSR=aLx0GW43gVPCdL-=hjP7z@mail.gmail.com> <AANLkTikbuWJbtPYaLW=8BEH4f5oiumzEN6rgwOB5tC=R@mail.gmail.com>
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On Sun, Jan 09, 2011 at 12:33:59AM -0600, Brandon Gooch wrote: > On Sun, Jan 9, 2011 at 12:01 AM, Xiaodong Yi <xdong.yi@gmail.com> wrote: > > Hi, > > > > I confirm that I no longer have time for Luvalley. However, I will be > > extreemly happy if anybody is willing to take over from me. > > Especially, I quite agree to customize Luvalley for FreeBSD, through > > it supports all kinds of Dom0 OSes. Howerver, I hope that the LIGHT > > architecture of Luvalley could be kept. Maybe it is useful to patch > > dom0 FreeBSD kernel (especially for interrupt handling), but it should > > not be very complex. Part of the code comes from KVM, and I suggest to > > keep flying with KVM to make sure that guest VMs work well. > > I believe that if serious effort were to be put forward by the FreeBSD > developers to further develop the code, the result would need to be > GPL and Linux free (or VERY close to it). This is an area of > contention within the FreeBSD developer and user community, so it > would need to be addressed. As the developer of Luvalley, do you have > the ability to re-license the code using a BSD license? > > Are there too many technical issues with the code to do this? Juergen > mentioned that bits of the code are based on (or pulled directly > from?) Linux KVM. That probably wouldn't fly here... > > > Luvalley does boot and run on bare hardware. But it does not taint > > dom0 FreeBSD. Although the `non-root' mode dom0 FreeBSD kernel has > > direct access to BIOS and hardware, Luvalley tries hard to coordinate > > with it. For example, Luvalley traps the BIOS calls from the FreeBSD > > kernel to report the modified E820 table. Another example is that > > Luvalley uses NMI as the IPI interrupt to avoid conflict with BSD > > kernel. And I also believe that simple patches could work if some > > corners of FreeBSD kernel are tainted. > > > > Regards, and looking forward to the following news ... > > > > Xiaodong > > As am I... > > Thanks for chiming in Xiaodong! Actually with `tainting' the FreeBSD kernel I meant causing it to be affected by the gpl and its requirements. So if someone were to ship e.g. an appliance that uses Luvalley and a modified FreeBSD kernel he would only have to provide sourcecode of Luvalley and the userland Luvalley version of qemu-kvm, not of his FreeBSD kernel modifications, or of other (non-gpl) userland apps for that matter. But again, IANAL. :) Cheers, Juergen (also hoping Luvalley will have a future...)
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