Re: [Xen-devel] about vmxassist

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 8/3/08 07:11, "yushang" <yusunn@xxxxxxxxx> wrote:

>>> I find the code path
>>> will enter the native real mode if do not use vmxassist , not a
>>> emulation one .
> Sorry but I mean the code path of hvmloader , just at the beginning of
> hvmloader, if do not use vmxassist execution will return from main and
> enter real-address mode then jmp to bios , so bios will run in
> real-address mode , is this true ?

Yes, as soon as real mode is entered (CR0 bit 0 is cleared) Xen notices that
and runs the guest through the full real-mode emulator until CR0 bit 0 is
set again.

 -- Keir



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