config VGA_ARB bool "VGA Arbitration" if EMBEDDED default y depends on PCI help Some "legacy" VGA devices implemented on PCI typically have the same hard-decoded addresses as they did on ISA. When multiple PCI devices are accessed at same time they need some kind of coordination. Please see Documentation/vgaarbiter.txt for more details. Select this to enable VGA arbiter.
config VGA_ARB_MAX_GPUS int "Maximum number of GPUs" default 16 depends on VGA_ARB help Reserves space in the kernel to maintain resource locking for multiple GPUS. The overhead for each GPU is very small.