Hi, I found that VFIO hides capabilities to userspace if a capability ID is not in the defined range (PCI_CAP_ID_MAX). What's the reason for this? Is it because it's not safe to expose an unknown capability to userspace? While we are at it, where can I get the list of all capability IDs defined other than Linux kernel source (pci_regs.h)? It seems like each capability ID is defined in PCI-SIG ECNs, but I wonder if there is an official document having all the IDs fro PCI-SIG? Thanks, Jintack
