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

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

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"?

Ian.


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