Date: Fri, 13 Dec 2013 18:28:14 -0800 From: Colin Percival <cperciva@freebsd.org> To: Mason Loring Bliss <mason@blisses.org>, freebsd-xen@freebsd.org Subject: Re: XEN vs XENHVM? Message-ID: <52ABC23E.4020408@freebsd.org> In-Reply-To: <20131214022355.GX19296@blisses.org> References: <20131214022355.GX19296@blisses.org>
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On 12/13/13 18:23, Mason Loring Bliss wrote: > I was psyched to see that GENERIC kernels in 10 have HVMXEN support by > default, but then I was left a little confused. > > What's the different between a kernel with options XEN and one with options > HVMXEN? The XEN option is for *paravirtualized* Xen -- aka. the original version, before Intel and AMD added virtualization support into their CPUs. HVM uses "hardware virtualization", but we also use PV drivers where available. > I'd love to be able to run FreeBSD domU systems without having to do > a custom compile whenever there's an update. I've got a 9.1 system running > now, using a copy of the XEN config with a couple tweaks, and I see all the > PV drivers I expect. I'm wondering what's different with XENHVM... Also > useful would be knowing if there are remaining differences between i386 and > amd64 as a domU in FreeBSD 10. You want to switch to using HVM with PV devices. That should be a simple tweak to your Xen configuration, and then you'll be able to use a GENERIC kernel. -- Colin Percival Security Officer Emeritus, FreeBSD | The power to serve Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid
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