[AMD Official Use Only - General] > -----Original Message----- > From: Alex Williamson <alex.williamson@xxxxxxxxxx> > Sent: Monday, November 14, 2022 9:05 PM > To: Gupta, Nipun <Nipun.Gupta@xxxxxxx> > Cc: cohuck@xxxxxxxxxx; kvm@xxxxxxxxxxxxxxx; Agarwal, Nikhil > <nikhil.agarwal@xxxxxxx>; Anand, Harpreet <harpreet.anand@xxxxxxx> > Subject: Re: IRQ affinity from VFIO API interface > > Caution: This message originated from an External Source. Use proper caution > when opening attachments, clicking links, or responding. > > > On Mon, 14 Nov 2022 10:29:14 +0000 > "Gupta, Nipun" <Nipun.Gupta@xxxxxxx> wrote: > > > [AMD Official Use Only - General] > > > > Hi Alex, Cornelia and other VFIO experts, > > > > We are using VFIO for the user-space applications (like DPDK) and need > > control to affine MSI interrupts to a particular CPU. One of the ways to > > affine interrupts are to use /proc/interrupts interface and set the smp_affinity, > > but we could not locate any API interface in VFIO from where this can be done. > > > > Can you please let me know if there is any other way to provide the CPU > > affinity, or does it seem legitimate to update "struct vfio_irq_set" to support > > the above said functionality. > > There is currently no way to set interrupt affinity via the vfio API. > You're welcome to propose something. Thanks, Thanks for the information. We shall then come up with something on this soon. Regards, Nipun > > Alex
