powerpc: Add Initiate Coprocessor Store Word (icswx) support

[karo-tx-linux.git] / arch / powerpc / platforms / Kconfig.cputype

diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 7c1e1c64437b4694797e6dfffd92356ad6df46b1..a1e623822a30c630a1aec527ca260c8029e4bbdd 100644 (file)
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -230,6 +230,24 @@ config VSX
 
          If in doubt, say Y here.
 
+config PPC_ICSWX
+       bool "Support for PowerPC icswx coprocessor instruction"
+       depends on POWER4
+       default n
+       ---help---
+
+         This option enables kernel support for the PowerPC Initiate
+         Coprocessor Store Word (icswx) coprocessor instruction on POWER7
+         or newer processors.
+
+         This option is only useful if you have a processor that supports
+         the icswx coprocessor instruction. It does not have any effect
+         on processors without the icswx coprocessor instruction.
+
+         This option slightly increases kernel memory usage.
+
+         If in doubt, say N here.
+
 config SPE
        bool "SPE Support"
        depends on E200 || (E500 && !PPC_E500MC)