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    SubjectRe: [Xen-devel] [PATCH] arm: introduce a DTS for Xen unprivileged virtual machines
    On Thu, Sep 20, 2012 at 11:45:57AM +0100, David Vrabel wrote:
    > On 19/09/12 18:44, Stefano Stabellini wrote:
    > > --- /dev/null
    > > +++ b/arch/arm/boot/dts/vexpress-xenvm-4.2.dts
    >
    > Does this make sense? There is no fixed configuration for VMs.
    >
    > Is the intention to pass a DTS to the toolstack for it to create the VM
    > with the appropriate amount of memory and peripheral mapped to the right
    > place etc? Or is the toolstack going to create the VM and generate the
    > DTB from (e.g.,) an xl VM configuration file.
    >
    > > +
    > > + hypervisor {
    > > + compatible = "xen,xen-4.2", "xen,xen";
    > > + reg = <0xb0000000 0x20000>;
    > > + interrupts = <1 15 0xf08>;
    > > + };
    >
    > This node needs to be generated by the toolstack as only it knows what
    > ABI the hypervisor has.

    That's a good point: the same applies to the command line. The toolstack
    knows where the console and root device should be etc.: the kernel itself
    shouldn't have static defaults for those.

    Cheers
    ---Dave


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