Messages in this thread |  | | | From | "Nakajima, Jun" <> | | Date | Fri, 29 May 2009 16:09:19 -0700 | | Subject | RE: [Xen-devel] Re: Xen is a feature |
On 5/29/2009 11:34:40 AM, Andi Kleen wrote: > George Dunlap <george.dunlap@eu.citrix.com> writes: > > cc list from hell trimmed. > > > allowing Linux to run as dom0 *is* improving Linux. The lack of > > dom0 support is at this moment making life more difficult for a huge > > number of Linux users who use Xen, including Mozilla, Debian, and Amazon. > > Adding dom0 support would make Linux even more useful to a wide > > variety of people not using Xen at the moment. > > Perhaps one way to address this problem would be to make the Dom0 > interface less intrusive for the host OS? > > Maybe impression last time I looked was that there was huge potential > of improvement in this area. For example the PAT issue recently > discussed was completely unnecessary. Or if you added a "VT/SVM only" > Dom0 mode I'm sure the interface would be significantly cleaner too. > If you can come up with a slim clean interface the chances for actual > integration would be likely much higher.
I think we still need some (or all?) of additional dom0 PV ops even for HVM (Hardware-based VM) dom0. Hardware-based virtualization can significantly clean up the CPU-related PV ops (including some for local APIC), but they have nothing to do with dom0.
Some hooks in the host could be removed by reusing the HVM-specific code with modifications to the virtualization logic, but I think people need to tell which specific ones are intrusive, to be fair.
. Jun Nakajima | Intel Open Source Technology Center
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