On Thu, Mar 11, 2021 at 12:16:02PM -0700, Keith Busch wrote: > On Thu, Mar 11, 2021 at 12:17:29PM -0600, Bjorn Helgaas wrote: > > On Wed, Mar 10, 2021 at 03:34:01PM -0800, Alexander Duyck wrote: > > > > > > I'm not so much worried about management software as the fact that > > > this is a vendor specific implementation detail that is shaping how > > > the kernel interfaces are meant to work. Other than the mlx5 I don't > > > know if there are any other vendors really onboard with this sort of > > > solution. > > > > I know this is currently vendor-specific, but I thought the value > > proposition of dynamic configuration of VFs for different clients > > sounded compelling enough that other vendors would do something > > similar. But I'm not an SR-IOV guy and have no vendor insight, so > > maybe that's not the case? > > NVMe has a similar feature defined by the standard where a PF controller can > dynamically assign MSIx vectors to VFs. The whole thing is managed in user > space with an ioctl, though. I guess we could wire up the driver to handle it > through this sysfs interface too, but I think the protocol specific tooling is > more appropriate for nvme. We need this MSI-X thing for IB and ethernet devices too. This is why PCI sysfs is the best place to put it, so all SR-IOV flavours will have sane way to configure it. Thanks
