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+# SPDX-License-Identifier: GPL-2.0
+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.
+