Boot problem with x86 VxWorks on a XEN HVM

Boot problem with x86 VxWorks on a XEN HVM

[Andreas Hollmann]

Hi,

i managed to boot a VxWorks 6.5 Kernel on QEMU without kqemu acceleration.
The bootloader and the precompiled Kernel, both belong to the Pentium 3 BSP,
which was delivered with the evaluation version of windriver workbench 2.6
for "intel".

Now I tried to boot the same VxWorks bootloader and Kernel inside a XEN HVM.

I see a message from the bootloader "V1.6+++..." and the machine hangs and
nothing is printed to the serial port.

The emulated IO, which is shown by the qemu monitor, seems to be nearly 
the same on QEMU and XEN.

Why certain os like Minix and Vxwork don't boot on a XEN HVM, but work
without problems on QEMU and will this problem be fixed in future 
versions of XEN?

Regards,
Andreas

Re: Boot problem with x86 VxWorks on a XEN HVM

[Keir Fraser]

On 11/10/07 16:00, "Andreas Hollmann" <capjo@arcor.de> wrote:

> Why certain os like Minix and Vxwork don't boot on a XEN HVM, but work
> without problems on QEMU and will this problem be fixed in future
> versions of XEN?

This is probably a vmxassist issue, in which case vxworks would boot fine on
an AMD CPU (with SVM support). Vmxassist will be retired one day. Probably
not before Xen 3.2.0 though!

 -- Keir