On 29 January 2013 08:49, Alexander Graf <ag...@suse.de> wrote: > - What's the plan for -device and IRQ assignment? > > We need to start coming up with a solution to connect irq > lines between cmdline created devices and interrupt > controllers. Currently, I'm aware of 2 potential users > > - virtio-mmio > - device assignment on platform devices > > I see 2 options: > > - create a new platform bus that enumerates IRQs linearly, > similar to how the ISA bus works > - allow arbitrary irq pin connection using a global pin > namespace
Surely what you want is to specify IRQ connections via something like "my-uart.irq => interrupt-controller.in[14]" (adjust punctuation to taste)? They're just device-to-device connections. You also need some way of specifying where in a memory map mmio devices should live. This is a little tricky because you don't want to assume a global flat address space (in future if we get the memory APIs right then devices could be in the address space of just one of 4 CPUs, for instance). "my-uart.regs => cpu1.memory[0x4000..0x4100]" ? -- PMM
