FBSD 8.0 And VirtualBox 3.1

Tim Daneliuk tundra at tundraware.com
Mon Dec 21 18:50:39 UTC 2009

On 12/21/2009 4:42 AM, Ivan Voras wrote:
> Marius Nünnerich wrote:
>> On Sat, Dec 19, 2009 at 04:48, Tim Daneliuk <tundra at tundraware.com>
>> wrote:
>>> On 12/18/2009 8:16 PM, Peter wrote:
>>>>> I have a machine running Win/XP Pro SP3 hosting VirtualBox 3.1.
>>>>> The hardware happily boots the Ubuntu amd64 CDROM natively and
>>>>> FreeBSD 8.0
>>>>> also boots fine - well ... up to the point where it has to ID the hard
>>>>> drive, but that's another story.
>>>>> IOW, the hardware is 64-bit capable (It is an Intel mobo w/a Pentium-D
>>>>> 940 w/EMT64 option).
>>>>> HOWEVER, when I run VirtualBox and try to install the 64 bit version
>>>>> of FreeBSD in a VM, it get a "CPU doesn't support long mode" error
>>>>> during the FreeBSD virtual booting process.  FreeBSD 8.0 i386 works
>>>>> fine.
>>>>> 'Anyone run across this before and/or have a fix?
>>>>> TIA,
>>>> Do you have VT-x/AMD-v enabled? [in the BIOS and VBox for this VM]
>>> Yup, but I wonder ... I'm running XP as the host which is 32-bit even
>>> though
>>> the hardware is 64-bit capabale.  Could this be limiting what VirtualBox
>>> can deliver?
>> Exactly. For 64bit guests the host has to be 64bit too afaik.
> No, if hardware extensions are enabled then PAE is the only requirement
> for 32-bit hosts to run 64-bit guests.
> According to Wikipedia
> (http://en.wikipedia.org/wiki/List_of_Intel_Pentium_D_microprocessors)
> some models of Pentium D have VT extensions and some don't. But then
> there's also the question of motherboard support.

Very strange.  I have tried this on two different motherboards and
neither works:

1) Win XP running on an Intel 945 mobo with a Pent D 940 which supposedly
   has VT support.

2) Ubuntu Karmic 64bit on a MSI P4M890 with a Pentium D 925 which may not
   have VT support.

Is the claim here that you cannot virtualize 64bit w/o VT support?  Certainly
you seem not to need it for 32 bit guests.
Tim Daneliuk     tundra at tundraware.com
PGP Key:         http://www.tundraware.com/PGP/

More information about the freebsd-virtualization mailing list