[Embeddedxen-devel] How to get to domU from dom0

[Krishna P. <pos...@gm...>]

Hi Thank You,


> From your screenshot it seems that you don't have a kernel but only
> EmbeddedXen.
>
>
Oh ...... I thought I got Kernel also, but it's OK,
My main objective is to break and make. I thought I will get it easily by
that approach.

Since, bootloader on QEMU for certain machine will already be present, I
wanted to test Kernel, Kernel + Xen etc etc.

Xen + linux dom0 + linux domU images together in a single binary uImage. If
> you follow the build instructions you will get a correct image.
>
> I have successfully loaded embedded-xen on qemu, I just wanted to start to
understand how it's made.

For that reason, I have started to pick from roots to make a string.


>
> Qemu terminal session (ctrl-alt-1) and dom0 output and shell in Qemu
> terminal session 3 (ctrl-alt-3).
>
> Yeah! I got it from Rossier Daniel, and I have successfully got a demo.


> > - you don't provide a disk image for the rootfs (-hda
> tools/rootfs/rootfs_v6.img)
>

Hey, you in the sense, If I/You/We provide kernel only and do not provide
rootfs, ..... that was the case.

BTW, I have got all the packages downloaded.

> My aim will be to use Kernel alone.

I don't understand your use case " to use Kernel alone" .


The same break and make, I just wanted to try.


> At some point your kernel will need some user space to jump to... This
> user space can be minimal (e.g busybox shell only) and completely contained
> in a RAM disk but is nevertheless required.
>
>
Oh, that was really very useful information.

I don't understand what you mean with "If you use a lone kernel image
> alone, in ELF format / compressed format, it's not working," if you try to
> boot qemu with a dom0 kernel image alone, it won't work since the kernel
> will lack some initialization and support provided by the hypervisor. You
> should nevertheless be able to boot a standard vanilla kernel image (not
> provided by our project).
>
> Yeah, that vanilla kernel, is somehow responsible for all the other
thoughts, I have had.

lone kernel image of vanilla works, I don't know, If some tweaking has
already been done. I just tried a downloaded one.

As said above, all images xen + dom0 kernel + domU kernel are packed
> together in a single binary which is loaded at startup.
>

Probably, I need to look into the makefile, to know, how it has been done.



> P.S. Please prefer plain text emails without embedded pictures for mailing
> lists.
>

yeah! sure, I will, just attached pics for easy understanding, I will
maximum try to avoid those.



-- 
✉ Thanks & Regards :: Krishna Pavan ✍