Re: [XenARM] Regarding ARMv7a architecture boards :: Xen-Unstable

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2012-02-02 at 13:00 +0000, Krishna Pavan wrote:
> Hi Xen-ARM,
> 
> I have noticed that Xen-ARM File from here
> http://xenbits.xen.org/gitweb/?p=people/sstabellini/xen-unstable.git/.git;a=shortlog;h=refs/heads/arm-v6
>  is to be used on QEMU.

Where is QEMU referenced at that link?

This port is targeting only ARMv7+ processors which have the new
virtualisation extensions. As far as I know there is not yet any such
processor on the market. We are currently targeting ARM's emulator.

Qemu does not emulate these extensions and I believe doing so is a low
priority for developers.

This port is described at:
        http://wiki.xen.org/wiki/Xen_ARMv7_with_Virtualization_Extensions

If you want a version of Xen ARM for existing processors (e.g. those
which lack these extensions) then I suggest you look at the XenARM
project:
        http://wiki.xen.org/wiki/Xen_ARM_(PV)
Previous versions of XenARM also supported pre-ARMv7 processors.

> The post here
> https://plus.google.com/106815887686504011057/posts/Kgdakxs5cFt#106815887686504011057/posts/Kgdakxs5cFt
>  uses armhf port from Debian [ Guest ] on linux 3.2.0 Kernel being dom0.

This is, as stated in the post, a native system (i.e. not running Xen)
which we built for the purposes of providing a native build environment
in order to be able to build the port. There is therefore no "guest" or
"dom0" involved in this.

> Question's that
> 
> Mainly, Have You been able to run Guest OS on QEMU with the
> Compilations for ARMv7a, or Cortex-A8 based boards?

The Xen for ARMv7 with virt extensions port is not currently to the
point of running guests.

I cannot speak for the XenARM project WRT ARMv7a or Cortex-a8 on qemu
specifically although in general it does run guests and I have seen
demos of it doing so.

Ian.



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