KVM_ASSIGN_SET_MSIX_NR and KVM_ASSIGN_SET_MSIX_ENTRY should support MSI?

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The new KVM_ASSIGN_SET_MSIX_NR and KVM_ASSIGN_SET_MSIX_ENTRY ioctls have
been merged for 2.6.30. However, I note that PCI spec allows devices to
support multiple vectors with MSI as well (support will be in linux
2.6.30).

Even though qemu for now only uses a single vector with MSI, it would
seem that it's better to make the kernel/user interface generic straight
away rather than add more ioctls later. What do you think? It might not
be too late to fix this for 2.6.30.

-- 
MST
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