Re: [Xen-devel] PV on HVM

[Alex Bligh <alex@xxxxxxxxxxx>]

Stefano,

--On 10 May 2010 15:20:36 +0100 Stefano Stabellini 
<stefano.stabellini@xxxxxxxxxxxxx> wrote:
> this is the updated version of the PV on HVM series: many bugs have been
> fixed and VIRQ_TIMER support has been added.
> In order to be able to use VIRQ_TIMER and to improve performances you
> need two other patches to Xen to implement the vector callback mechanism
> for event channel delivery and to export some time related hypercalls to
> HVM guests too.
>
> This series is based on a standard 2.6.32 tree, a git tree is also
> available here:
>
> git://xenbits.xen.org/people/sstabellini/linux-pvhvm.git
>
> branch name 2.6.32-pvhvm.
This appears to a be complete kernel tree. It isn't immediately
obvious from the git log whether there are substantial differences
outside drivers/xen and include/xen? Are there any? Or should I be able
to simply import these directories into a distributor kernel tree
and compile from there?

One of the problems I found when doing this:
 http://blog.alex.org.uk/archives/23
is that the standard Ubuntu tree already has a xen directory,
leading to all sorts of amusing collisions, at compile time (in
terms of filename paths), and at link time (if CONFIG_XEN
is selected, and the idea is to build a kernel that works
both in paravirtualised guest mode and in HVM mode with PV
drivers). I got around the former, but not the latter.

--
Alex Bligh

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