[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-users] IOMMU Domain for Dom0
Hi, 2011/6/22 sploving <sploving1@xxxxxxx>: > > > > AtÂ2011-06-21Â12:17:56ï"AlexÂMerritt"Â<merritt.alex@xxxxxxxxx>Âwrote: > >>Hello, >> >>I'veÂbeenÂexperimentingÂwithÂVT-dÂsupportedÂPCI-passthroughÂinÂXenÂfor >>HVMÂguests,ÂandÂwasÂwonderingÂifÂitÂisÂpossibleÂtoÂcreateÂanÂIOMMU >>domainÂforÂDom0ÂasÂwell.ÂI'mÂnotÂsureÂifÂI'mÂaskingÂtheÂquestion >>correctly,ÂbutÂtoÂavoidÂchangingÂaÂbare-metalÂdriverÂforÂanÂI/OÂdevice >>toÂtranslateÂsystemÂmemoryÂaddressesÂusedÂbyÂaÂDMAÂengine,ÂwouldÂI >>insteadÂbeÂableÂtoÂallowÂtheÂIOMMUÂtoÂtransparentlyÂtranslate >>addressesÂjustÂlikeÂforÂguestÂVMs,ÂbutÂwithinÂDom0? > why put the IOMMU within Dom0? not in the driver domain? I'm using research code, which currently requires the management extension and driver to exist within the same domain. IOMMUs are meant for guest VMs as far as I can tell. They can be used as driver domains, too, but (unless I'm mistaken) cannot use the management interfaces available in Dom0. My driver domain is also Dom0 at the moment. > ÂSomeÂsearchingÂand >>readingÂofÂtheÂwikiÂpagesÂonÂxen.orgÂtellsÂmeÂtheÂanswerÂisÂ"no".ÂBut >>IÂcannotÂdetermineÂifÂthisÂisÂpurelyÂbecauseÂtheÂimplementationÂwithin >>theÂVMMÂdoesn'tÂexist,ÂorÂbecauseÂitÂisÂthatÂDom0ÂisÂpara-virtualized >>andÂthusÂcannotÂuseÂVT-dÂwithoutÂVT-x.ÂI'mÂsuspectingÂitÂisÂnotÂthe >>latter,ÂasÂtheÂVTdHowToÂwikiÂpageÂhintsÂPVÂguestsÂmayÂuseÂVT-dÂandÂthe >>IntelÂmanualÂforÂVT-dÂdescribesÂOSÂdevelopersÂmayÂtakeÂadvantageÂof >>thisÂextension. >> >>MyÂimmediateÂinterestÂisÂmoreÂtoÂseeÂifÂitÂ"canÂbeÂdone"ÂviaÂaÂhackÂor >>something,ÂnotÂnecessarilyÂwhetherÂitÂwouldÂmakeÂsense > forÂXenÂto >>supportÂthisÂinÂtheÂfuture. >> > You should ask this question in xen-dev list. Okay, I'll do that. I'm new to these mailing lists, and wasn't sure where to start. Thanks. >>I'mÂusingÂXenÂ4.1.1ÂandÂpv-opsÂlinuxÂ(notÂupstream)Â2.6.32.40ÂonÂan >>IntelÂX5660ÂwithÂa > TylersburgÂchipset. >> >>Thanks! >>Alex >> >>_______________________________________________ >>Xen-usersÂmailingÂlist >>Xen-users@xxxxxxxxxxxxxxxxxxx >>http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-users
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |