Re: [Xen-devel] [PATCH] tools/hvmloader: move shared_info to reserved memory area

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2012-10-25 at 12:46 +0100, Olaf Hering wrote:
> On Thu, Oct 25, Keir Fraser wrote:
> 
> > To be honest, given that the XenPVHVM extensions to Linux won't have been
> > tested on such old hypervisors, it wouldn't be a bad thing to bail on
> > setting up the extensions when you detect running on a really old Xen
> > version (e.g., earlier than 3.4.0) anyway. There's a fair chance of doing
> > more harm than good?
> 
> I could stick such a check into
> arch/x86/xen/enlighten.c:x86_hyper_xen_hvm->detect, by rearranging the
> code of xen_hvm_platform and init_hvm_pv_info.  Konrad, what do you
> think about that?

If you do something like this please could you add a command line option
to allow it to be forced both off and on?

I suppose this relates a bit to xen_emul_unplug too?

> Recent changes indicate that you did some testing on
> 3.4 based hosts.

NB Keir said "earlier than 3.4". I think we would want to try and
support 3.4, but not 3.3.

Ian.


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