Tom,
You don't have to hide code to have functional VMM, for example VBox
patch code is visible to the guest, it's just being relocated if guest
tries to use particular patch address.
And unfortunately Intel marketing decided to keep low end Core 2 Duo
(such as mine E7400) without VT-x, so for some hardware it still makes
sense, just pretty hard to do. Also, IIRC, VMWare can run 64-bit OSes in
pure software mode.
Nikolay.
Tom Birch пишет:
I believe there was a paper by some vmware guys about this, but
basically AMD64 doesn't support segment limits so there's no efficient
way run the VMM inside the guest OS and still keep it hidden. It's an
issue with the actual hardware, not VirtualBox - I don't know of any
VMM today that supports 64bit guests without Intel-VT/AMD-V. This blog
post summarizes it fairly well: http://www.pagetable.com/?p=25
Except for a couple of CPU models at the start, almost every
64bit-capable x86 chip also has VT so it's not really worth trying to do it.
Tom
On Tue, Oct 27, 2009 at 8:35 AM, <[email protected]> wrote:
Hello,
Why VirtualBox currently doesn't support running 64-bit guest OS on 64-bit
host on CPUs without Intel-VT/AMD-V?
What should be done to implement it and how big effort would it take to
complete? I've got some experience
in C/C++ and Unices and free weekends...
Regards,
Jakub Jozwicki
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