Thanks . I see . It seems the real-mode emulator is more advanced than
vmxassist ?
2008年3月9日, 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
>
>
>
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel