Hi Gerry, On 16/10/15 02:55, Jiang Liu wrote: > On 2015/10/15 23:39, Marc Zyngier wrote: >> There seems to be a new class of interrupt controller out there whose >> sole purpose (apart from making everybody's life a nightmare) is to >> turn wired interrupts into MSIs. >> >> Instead of considering that the MSIs allocated to a device are for the >> direct use of that device, we can turn this set of MSIs into a irq >> domain, and use that domain to build a standard irqchip on top of >> that. > Hi Marc, > There's a working to enable Intel VMD storage device, which > has the similar requirement. Basically a PCIe hierarchy is hidden > behind a parent PCIe device, so we need to use the PCIe irqs on parent > to de-multiple PCIe IRQs from hidden PCIe devices. Seems a chance for > consolidation here. Do you know if there is a 1-1 mapping between the interrupts seen by the parent device and those seen by the hidden devices? Or is it a case of having to demultiplex the MSIs? Looks like the former, but I'd like to be sure. I just had a quick look at the code there: https://lkml.org/lkml/2015/8/27/674 Is there anything more recent? > cc Keith Busch <keith.busch@xxxxxxxxx> who is the author of > VMD device driver. Sure, will do when I repost this (probably in a few weeks), and assuming this fits the bill for Thomas and the MBIGEN folks. Thanks, M. -- Jazz is not dead. It just smells funny... -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
