> From: Vasant Hegde <vasant.hegde@xxxxxxx> > Sent: Wednesday, May 7, 2025 3:42 PM > > Hi Jason, > > > On 5/6/2025 5:31 PM, Jason Gunthorpe wrote: > > Do you need a modify queue operation? > > We have two types of operations. One that impacts the queue, other set of > bits > which doesn't operate on qeueue. > > ex: Event log buffer > - We configure "MMIO Offset 0010h Event Log Base Address Register" with > Base > address and size > > - MMIO Offset 0018h IOMMU Control Register > EventLogEn: Event log enable > * When guest sets this bit, qemu will trap and will send queue_alloc > * When guest disables this bit, qemu will trap and send vqueue_destroy > > This part is fine. > > EventIntEn: Event log interrupt enable > * When guest sets this bit, qemu will trap > * this needs to be communicated to Host so that we can program VF > Control > BAR and enable the interrupt > > - There is other bit "Completion wait interrupt enable" > This doesn't related to any buffer. Instead if we configure this for > completion wait command it will generate interrupt. > > I am asking how do we handle above two steps? Should it be part of queue > IOCTL > or may be some other IOCTL which just passes these info to HW driver? > Probably IOMMUFD_CMD_OPTION can server the purpose?
