FBSD 8.0 And VirtualBox 3.1

[Jase Thew]

On 21/12/2009 18:50, Tim Daneliuk wrote:
> 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.
>    
64bit guests require VT support :
http://www.virtualbox.org/manual/UserManual.html#intro-64bitguests

hth,

Jase.