MIPS: Kconfig: Don't allow both microMIPS and SmartMIPS to be selected.

microMIPS and SmartMIPS can't be used together. This fixes the
following build problem:

Warning: the 32-bit microMIPS architecture does not support the `smartmips' extension
arch/mips/kernel/entry.S:90: Error: unrecognized opcode `mtlhx $24'
[...]
arch/mips/kernel/entry.S:109: Error: unrecognized opcode `mtlhx $24'

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7421/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 12 insertions, 2 deletions

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index f43aa536c517..9536ef912f59 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -2101,9 +2101,17 @@ config 64BIT_PHYS_ADDR
 config ARCH_PHYS_ADDR_T_64BIT
        def_bool 64BIT_PHYS_ADDR
 
+choice
+        prompt "SmartMIPS or microMIPS ASE support"
+
+config CPU_NEEDS_NO_SMARTMIPS_OR_MICROMIPS
+        bool "None"
+        help
+          Select this if you want neither microMIPS nor SmartMIPS support
+
 config CPU_HAS_SMARTMIPS
         depends on SYS_SUPPORTS_SMARTMIPS
-        bool "Support for the SmartMIPS ASE"
+        bool "SmartMIPS"
         help
           SmartMIPS is a extension of the MIPS32 architecture aimed at
           increased security at both hardware and software level for
@@ -2115,11 +2123,13 @@ config CPU_HAS_SMARTMIPS
 
 config CPU_MICROMIPS
         depends on SYS_SUPPORTS_MICROMIPS
-        bool "Build kernel using microMIPS ISA"
+        bool "microMIPS"
         help
           When this option is enabled the kernel will be built using the
           microMIPS ISA
 
+endchoice
+
 config CPU_HAS_MSA
         bool "Support for the MIPS SIMD Architecture (EXPERIMENTAL)"
         depends on CPU_SUPPORTS_MSA