FBSD 8.0 And VirtualBox 3.1

Ivan Voras ivoras at freebsd.org
Mon Dec 21 11:21:47 UTC 2009

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 
some models of Pentium D have VT extensions and some don't. But then 
there's also the question of motherboard support.

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