Messages in this thread | | | Subject | Re: [PATCH RFC 00/15] Add VFIO mediated device support and IMS support for the idxd driver. | From | "Dey, Megha" <> | Date | Fri, 1 May 2020 15:31:14 -0700 |
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Hi Jason,
On 4/23/2020 12:49 PM, Jason Gunthorpe wrote: > 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) >
So basically you are looking for a way to dynamically allocate the platform-msi interrupts, correct?
Since I don't have access to any of the platform-msi devices, it is hard for me to test this code for other drivers expect idxd for now. Once I submit the next round of patches, after addressing all the comments, would it be possible for you to test this code for any of your devices?
> 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 >
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