config X86
	select 64BIT
	def_bool y

config X86_64
	def_bool 64BIT

menu "x86 Options"

config PCI_VERBOSE
	bool "Verbose PCI Output"
	default n
	help
		Will print out extra information related to PCI.

config NOFASTCALL_FSBASE
	depends on X86_64
	bool "Disable fastcall to set FS base"
	default n
	help
		Disable the fast path syscall to set FS base.  If your hardware allows
		setting FS base from userspace, you can say y to disable the fastcall
		for a slight improvement for all syscalls.  If unsure, say n.

endmenu

menu "x86 Hacks"

config LOUSY_LAPIC_TIMER
	bool "Lousy Local APIC Timer"
	default n
	help
		This turns our one-shot APIC timer into a periodic timer.  If your
		system seems to lock up until you hit the keyboard, say 'Y' here and
		report the results.

		Qemu without KVM had issues firing a one-shot LAPIC timer (the timer IRQ
		would only go off when some other IRQ fired), but it worked with a
		periodic tick.  Since we aggressively disarm the timer, this config
		shouldn't be a performance hit.

config NOMTRRS
	bool "Disable MTRRs"
	default y
	help
		Old debug option from when we were having issues with MTRRs.  If your
		machine won't boot, try turning this on.

config KB_CORE0_ONLY
	bool "Keyboard from core0 only"
	default n
	help
		Say 'n' unless you are using a buggy x86 machine that can't handle
		polling the keyboard PIO from cores other than core 0.

config X86_DISABLE_KEYBOARD
	bool "Disable Keyboard"
	default n
	help
		x86 machines with a legacy USB keyboard often implement the USB stack
		in SMM mode.  When doing anything with the keyboard, including polling
		the keyboard from the kernel monitor, SMM mode can dramatically
		interfere with other cores (like a 10-15x performance impact on some
		benchmarks).
		
		Say 'y' if you have such a machine and do not need the keyboard.

config ENABLE_LEGACY_USB
	bool "Enable Legacy USB"
	default n
	help
		Say 'y' if you want to use a USB keyboard.  Given that we do not have a
		USB stack, disabling legacy USB means USB keyboards will not work.  We
		disable legacy USB by default, since our primary console communication
		is serial, and legacy USB support results in SMM interference that
		affects all cores.

endmenu