Re: Xen in Virtual Machine?
Kip Macy writes: > On Mon, Feb 9, 2009 at 4:35 PM, Julian Stecklina wrote: >> Kip Macy writes: >> >> I'll try VMWare. Thanks for the advice. I am still puzzled why Xen >> presents such a problem for hardware-virtualization based VMMs. Maybe >> the virtualization guys at our university can clear that up... >> > > 32-bit Xen uses segments in an unusual way. They may not be > implementing emulation support for this correctly. Do you mean using additional protection rings? Yes, no one does that except Xen. Regards, -- Julian Stecklina Well, take it from an old hand: the only reason it would be easier to program in C is that you can't easily express complex problems in C, so you don't. - Erik Naggum (in comp.lang.lisp) ___ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org"
Re: Xen in Virtual Machine?
On Mon, Feb 9, 2009 at 4:35 PM, Julian Stecklina wrote: > Kip Macy writes: > > I'll try VMWare. Thanks for the advice. I am still puzzled why Xen > presents such a problem for hardware-virtualization based VMMs. Maybe > the virtualization guys at our university can clear that up... > 32-bit Xen uses segments in an unusual way. They may not be implementing emulation support for this correctly. Cheers, Kip ___ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org"
Re: Xen in Virtual Machine?
Kip Macy writes: > Running Xen under vmware works fine (albeit slowly, and periodically > exposing bugs in vmware) - I've done it many times. You're likely to > run in to problems on less mature platforms that rely on hardware > virtualization. However, there is no fundamental reason that > paravirtualized guests should not work there. I'll try VMWare. Thanks for the advice. I am still puzzled why Xen presents such a problem for hardware-virtualization based VMMs. Maybe the virtualization guys at our university can clear that up... Regards, -- Julian Stecklina Well, take it from an old hand: the only reason it would be easier to program in C is that you can't easily express complex problems in C, so you don't. - Erik Naggum (in comp.lang.lisp) ___ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org"
Re: Xen in Virtual Machine?
Hi, great to hear. The machine I tested this on did not have hardware virtualization support and I think about 1 - 1 1/2 years went down since I've tested this scenario. I will definitely give it a shot the moment I own a HVM capable notebook, since I'm heavily tied to vmware from work, but love XEN in my spare time ;-)) -- Mr. Olli Am Montag, den 09.02.2009, 13:28 -0800 schrieb Kip Macy: > Running Xen under vmware works fine (albeit slowly, and periodically > exposing bugs in vmware) - I've done it many times. You're likely to > run in to problems on less mature platforms that rely on hardware > virtualization. However, there is no fundamental reason that > paravirtualized guests should not work there. > > Cheers, > Kip > > On Mon, Feb 9, 2009 at 1:09 PM, Mister Olli > wrote: > > Hi, > > > > from what I can tell this is impossible since XEN needs to have access > > to ring0 of the CPU which has the highest priviledge level. And there > > can only be one kernel at a time. > > > > I know that with VMware there's a thing like VMware ESX server in VMware > > workstation (combination could be slightly different ;-)) possible. > > > > I don't know that much about the XEN internas to say if it's possible to > > modify XEN, so that something similar is possible. > > > > I once tried building a XEN dom0 kernel under VMware workstation 6.0 but > > the building process itself failed with some errors on APIC. > > > > -- > > Mr. Olli > > > > > > Am Montag, den 09.02.2009, 20:39 +0100 schrieb Julian Stecklina: > >> Hello, > >> > >> I am trying to build a kvm (or VirtualBox) virtual machine to painlessly > >> experiment with Xen on my 32-bit Linux laptop (Core Duo L2400 with > >> hardware virtualization foo) or my 64-bit Linux desktop box (Phenom > >> 8450). So far neither of the two manage to run Xen with either of the > >> above mentioned VMMs. Has someone already done this or am I out of luck > >> and have to get a real test box? > >> > >> Regards, > > > > ___ > > freebsd-xen@freebsd.org mailing list > > http://lists.freebsd.org/mailman/listinfo/freebsd-xen > > To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org" > > ___ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org"
Re: Xen in Virtual Machine?
Running Xen under vmware works fine (albeit slowly, and periodically exposing bugs in vmware) - I've done it many times. You're likely to run in to problems on less mature platforms that rely on hardware virtualization. However, there is no fundamental reason that paravirtualized guests should not work there. Cheers, Kip On Mon, Feb 9, 2009 at 1:09 PM, Mister Olli wrote: > Hi, > > from what I can tell this is impossible since XEN needs to have access > to ring0 of the CPU which has the highest priviledge level. And there > can only be one kernel at a time. > > I know that with VMware there's a thing like VMware ESX server in VMware > workstation (combination could be slightly different ;-)) possible. > > I don't know that much about the XEN internas to say if it's possible to > modify XEN, so that something similar is possible. > > I once tried building a XEN dom0 kernel under VMware workstation 6.0 but > the building process itself failed with some errors on APIC. > > -- > Mr. Olli > > > Am Montag, den 09.02.2009, 20:39 +0100 schrieb Julian Stecklina: >> Hello, >> >> I am trying to build a kvm (or VirtualBox) virtual machine to painlessly >> experiment with Xen on my 32-bit Linux laptop (Core Duo L2400 with >> hardware virtualization foo) or my 64-bit Linux desktop box (Phenom >> 8450). So far neither of the two manage to run Xen with either of the >> above mentioned VMMs. Has someone already done this or am I out of luck >> and have to get a real test box? >> >> Regards, > > ___ > freebsd-xen@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-xen > To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org" > ___ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org"
Re: Xen in Virtual Machine?
Hi, from what I can tell this is impossible since XEN needs to have access to ring0 of the CPU which has the highest priviledge level. And there can only be one kernel at a time. I know that with VMware there's a thing like VMware ESX server in VMware workstation (combination could be slightly different ;-)) possible. I don't know that much about the XEN internas to say if it's possible to modify XEN, so that something similar is possible. I once tried building a XEN dom0 kernel under VMware workstation 6.0 but the building process itself failed with some errors on APIC. -- Mr. Olli Am Montag, den 09.02.2009, 20:39 +0100 schrieb Julian Stecklina: > Hello, > > I am trying to build a kvm (or VirtualBox) virtual machine to painlessly > experiment with Xen on my 32-bit Linux laptop (Core Duo L2400 with > hardware virtualization foo) or my 64-bit Linux desktop box (Phenom > 8450). So far neither of the two manage to run Xen with either of the > above mentioned VMMs. Has someone already done this or am I out of luck > and have to get a real test box? > > Regards, ___ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org"
Re: Xen in Virtual Machine?
Hi Julian, So, you want to run Xen hypvervisor inside a kvm or virtualbox machine? If so, I don't think its possible. I tried it also with virtualbox and was unable. I did some research and tweaks but couldn't find an answer except that "it wont work" - probably because Xen hypervisor depends on full hysical CPU access. The Xen hypervisor is pretty stable, I don't see why you couldn't get it running on a Linux workstation. Also note that with some computers you need to turn on Virtualization Technology in the BIOS. Regards, Mark http://www.rootbsd.net On Mon, Feb 9, 2009 at 2:39 PM, Julian Stecklina wrote: > Hello, > > I am trying to build a kvm (or VirtualBox) virtual machine to painlessly > experiment with Xen on my 32-bit Linux laptop (Core Duo L2400 with > hardware virtualization foo) or my 64-bit Linux desktop box (Phenom > 8450). So far neither of the two manage to run Xen with either of the > above mentioned VMMs. Has someone already done this or am I out of luck > and have to get a real test box? > > Regards, > -- > Julian Stecklina > > Well, take it from an old hand: the only reason it would be easier to > program in C is that you can't easily express complex problems in C, > so you don't. - Erik Naggum (in comp.lang.lisp) > > ___ > freebsd-xen@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-xen > To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org" > ___ freebsd-xen@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-xen To unsubscribe, send any mail to "freebsd-xen-unsubscr...@freebsd.org"
