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    SubjectRe: [PATCH v9 12/18] vfio: Register/unregister irq_bypass_producer
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    On 21/09/2015 10:56, Wu, Feng wrote:
    > Hi Paolo & Alex,
    >
    > I find that there is a build error in the following two cases:
    > - KVM is configured as 'M' and VFIO as 'Y'
    > The reason is the build of irqbypass manager is triggered in
    > arch/x86/kvm/Makefile, and VFIO is built before KVM, hence
    > it cannot find the symbols in irqbypass manager.
    >
    > - Disable KVM and enable VFIO in .config
    > The reason is similar with the above one, the irqbypass manager
    > is not built since KVM is not configured.
    >
    > I think the point is that we cannot trigger the build of irqbypass
    > manager inside KVM or VFIO, we need trigger the build at a high
    > level and it should be built before VFIO and KVM. Any ideas?

    We can add virt/Makefile and build virt/lib/ directly, not through
    arch/x86/kvm.

    Paolo


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