On Thu, 2024-06-27 at 17:38 +0300, Shay Drory wrote: > PCI subfunctions (SF) are anchored on the auxiliary bus. PCI physical > and virtual functions are anchored on the PCI bus. The irq information > of each such function is visible to users via sysfs directory "msi_irqs" > containing files for each irq entry. However, for PCI SFs such > information is unavailable. Due to this users have no visibility on IRQs > used by the SFs. > Secondly, an SF can be multi function device supporting rdma, netdevice > and more. Without irq information at the bus level, the user is unable > to view or use the affinity of the SF IRQs. > > Hence to match to the equivalent PCI PFs and VFs, add "irqs" directory, > for supporting auxiliary devices, containing file for each irq entry. > > For example: > $ ls /sys/bus/auxiliary/devices/mlx5_core.sf.1/irqs/ > 50 51 52 53 54 55 56 57 58 > > Cc: Simon Horman <horms@xxxxxxxxxx> > Reviewed-by: Parav Pandit <parav@xxxxxxxxxx> > Signed-off-by: Shay Drory <shayd@xxxxxxxxxx> > > --- > v7-v8: > - use cleanup.h for info and name fields (Greg) AFAICT Greg (also) asked about using guards for the lock. Thanks, Paolo
