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diff --git a/arch/mips/sgi-ip27/Kconfig b/arch/mips/sgi-ip27/Kconfig
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+choice
+	prompt "Node addressing mode"
+	depends on SGI_IP27
+	default SGI_SN_M_MODE
+
+config SGI_SN_M_MODE
+	bool "IP27 M-Mode"
+	help
+	  The nodes of Origin, Onyx, Fuel and Tezro systems can be configured
+	  in either N-Modes which allows for more nodes or M-Mode which allows
+	  for more memory.  Your hardware is almost certainly running in
+	  M-Mode, so choose M-mode here.
+
+config SGI_SN_N_MODE
+	bool "IP27 N-Mode"
+	help
+	  The nodes of Origin, Onyx, Fuel and Tezro systems can be configured
+	  in either N-Modes which allows for more nodes or M-Mode which allows
+	  for more memory.  Your hardware is almost certainly running in
+	  M-Mode, so choose M-mode here.
+
+endchoice
+
+config MAPPED_KERNEL
+	bool "Mapped kernel support"
+	depends on SGI_IP27
+	help
+	  Change the way a Linux kernel is loaded into memory on a MIPS64
+	  machine.  This is required in order to support text replication on
+	  NUMA.  If you need to understand it, read the source code.
+
+config REPLICATE_KTEXT
+	bool "Kernel text replication support"
+	depends on SGI_IP27
+	select MAPPED_KERNEL
+	help
+	  Say Y here to enable replicating the kernel text across multiple
+	  nodes in a NUMA cluster.  This trades memory for speed.
+
+config REPLICATE_EXHANDLERS
+	bool "Exception handler replication support"
+	depends on SGI_IP27
+	help
+	  Say Y here to enable replicating the kernel exception handlers
+	  across multiple nodes in a NUMA cluster. This trades memory for
+	  speed.