Dong, Eddie wrote: >> BTW, why we use vector here? shouldn't it be irq_line or irq_no? > > Maybe you mean the Channel Subsystem (1st piece of knowledge and > surprise known from s390 doc) are emulated in Qemu, correct? The vector field was introduced by Avi's comment. I just copied that over. On s390, we only have irq numbers, no vectors. For now, we don't want to emulate the channel subsystem, just paravirt. Technically, we could do a passthrough in the long term just like pci devices can be dedicated to a guest using an iommu in the memory mapped I/O world.
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