/proc/bus/ - installed buses

/proc/bus/ Contains subdirectories for installed buses. /proc/bus/pccard/ Subdirectory for PCMCIA devices when CONFIG_PCMCIA is set at kernel compilation time. /proc/bus/pccard/drivers/proc/bus/pci/ Contains various bus subdirectories and pseudo-files containing information about PCI buses, installed devices, and device drivers. Some of these files are not ASCII. /proc/bus/pci/devices Information about PCI devices. They may be accessed through lspci(8) and setpci(8).

/proc/bus/ - installed buses

proc(5) Linux man-pages 6.9.1 2024-05-02 proc_bus(5)