Re: [Xen-devel] [PATCH] nestedhvm: xentrace support

[Christoph Egger <Christoph.Egger@xxxxxxx>]

On 04/14/11 16:00, Keir Fraser wrote:
> On 13/04/2011 16:34, "Christoph Egger"<Christoph.Egger@xxxxxxx>  wrote:
>
> > Tracing facility for nested virtualization
> >
> > Signed-off-by: Christoph Egger<Christoph.Egger@xxxxxxx>
> I fixed this, by adding an extra argument to HVMTRACE_ND() -- it wasn't
> really valid to make the first argument be an arbitarry C expression, due to
> argument concatenation that then went on in the macro body.
Thanks for your effort.

> I also discarded the change to the VMENTRY record to add the guest EIP.
> Firstly, it was incomplete, because it did not handle 64-bit RIP. Secondly,
> it does not logically belong in this patch. Finally, George may have a
> reason for not including RIP in VMENTRY records (e.g., not that useful
> compared with the extra space taken up in trace records). So you'd need to
> submit a new patch and get an Ack from George (who is currently on holiday).
Ok. If he has one I would like to know it.
For nested virtualization it is at least good debugging information to 
see if the l2 guest loops somewhere or not.
Christoph


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