Re: [Xen-devel] [PATCH v2] libxl: Handle xen_platform_pci=0 case with qemu-xen.

[Fabio Fantoni <fabio.fantoni@xxxxxxx>]

Il 29/11/2013 11:34, Ian Campbell ha scritto:
> On Wed, 2013-11-27 at 18:21 +0000, Anthony PERARD wrote:
> > This should result in QEMU *not* adding the xen-platform device.
> >
> > Since QEMU 1.6, this can be achieved by using a different qemu machine.
> > The one used by libxl is "xenfv", but using QEMU >=1.6 with "-machine
> > pc,accel=xen" works as well with only one difference compared to
> > "xenfv", there is no xen-platform device.
> >
> > Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
> Applied.
>
> I wonder -- should we make a statement somewhere about the minimum
> supported version qemu? Similar to how we do with e.g. gcc. I suppose we
> would start at 1.5 since that is when support first went upstream? As
> time goes by we will need to take into account what version is in the
> various stable distros.
>
> Perhaps we should add this to the README as an optional build
> dependency. e.g. "Although Xen ships with an included qemu-xen you can
> also choose to use a system provided qemu provided it is built with Xen
> support and is at least version X.Y"?
I think is good to suggest qemu>=1.6.1
In the last months I have kept tested a lot of the newer versions of 
qemu upstream from upstream git (xen git was with qemu 1.3), if I 
remember good qemu 1.5 have an important bug with xen on some cases, 
solved with 1.6 but 1.6 have a critical bug with all xen hvm domUs 
solved with 1.6.1.
With 1.6.1 I not found any critical or important xen related new bugs or 
regressions for now, I tested windows 7, xp and some fedora, ubuntu and 
debian versions as hvm domUs.
> Ian.
>
>
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