enabling kvm support on a Vaio?

enabling kvm support on a Vaio?

[Louis-David Mitterrand]

Hi,

On a brand new Sony Vaio (VGN-FW21Z) VT is disabled and there is no bios
option to enable it (on my Dell XPS laptop thankfully one can enable VT
in the bios).

Can Sony's stupidity (or should I say my own stupidity for purchasing
from that brand) be worked around to enable VT?

Apparently some have used hex editors on bios images with success, but
each model is a specific case I suppose. Or is there a way to find the
location of the VT setting in a bios image?

Thanks,

-- 
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Re: enabling kvm support on a Vaio?

[Avi Kivity]

Louis-David Mitterrand wrote:
> Hi,
>
> On a brand new Sony Vaio (VGN-FW21Z) VT is disabled and there is no bios
> option to enable it (on my Dell XPS laptop thankfully one can enable VT
> in the bios).
>
> Can Sony's stupidity (or should I say my own stupidity for purchasing
> from that brand) be worked around to enable VT?
>
> Apparently some have used hex editors on bios images with success, but
> each model is a specific case I suppose. Or is there a way to find the
> location of the VT setting in a bios image?
>   

If you are able to disassemble and reassemble the bios (most likely this 
involves decompression, recompression, and writing a checksum, the code 
writes to msr MSR_IA32_FEATURE_CONTROL (0x3a).  Nopping out writes to 
this msr will allow VT to be used.  Any mistake will likely brick the 
machine, so be sure to have at least a dozen if you want to experiment.

-- 
error compiling committee.c: too many arguments to function