Re: [PATCH RFC 00/15] Add VFIO mediated device support and IMS support for the idxd driver.

Dey, Megha
2020-05-03T22:32:51Z

Hi Jason,

On 5/3/2020 3:21 PM, Jason Gunthorpe wrote:
> On Fri, May 01, 2020 at 03:31:14PM -0700, Dey, Megha wrote:
>> 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?
>
> The basic high level interface here seems fine, which is bascially a
> way for a driver to grab a bunch of platform-msi interrupts for its
> own use

ok!
>
>> 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?
>
> Possibly, need to find time
>
Sure, thanks!

> Jason
>