On Thu, Apr 23, 2020 at 12:17:50PM -0700, Dan Williams wrote: > Per Megha's follow-up can you send the details about that other device > and help clear a path for a device-specific MSI addr/data table > format. Ever since HMM I've been sensitive, perhaps overly-sensitive, > to claims about future upstream users. The fact that you have an > additional use case is golden for pushing this into a common area and > validating the scope of the proposed API. I think I said it at plumbers, but yes, we are interested in this, and would like dynamic MSI-like interrupts available to the driver (what Intel calls IMS) It is something easy enough to illustrate with any RDMA device really, just open a MR against the addr and use RDMA_WRITE to trigger the data. It should trigger a Linux IRQ. Nothing else should be needed. Jason
