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[S390] Add config option for z196 code generation.
Add a kernel config option for the IBM zEnterprise 196. This will produce faster code on newer compilers using the -march=z196 option. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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3 changed files with 15 additions and 2 deletions
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@ -287,6 +287,14 @@ config MARCH_Z10
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machines such as the z990, z890, z900, z800, z9-109, z9-ec
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and z9-bc.
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config MARCH_Z196
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bool "IBM zEnterprise 196"
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help
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Select this to enable optimizations for IBM zEnterprise 196.
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The kernel will be slightly faster but will not work on older
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machines such as the z990, z890, z900, z800, z9-109, z9-ec,
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z9-bc, z10-ec and z10-bc.
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endchoice
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config PACK_STACK
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@ -40,6 +40,7 @@ cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900)
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cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)
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cflags-$(CONFIG_MARCH_Z9_109) += $(call cc-option,-march=z9-109)
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cflags-$(CONFIG_MARCH_Z10) += $(call cc-option,-march=z10)
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cflags-$(CONFIG_MARCH_Z196) += $(call cc-option,-march=z196)
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#KBUILD_IMAGE is necessary for make rpm
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KBUILD_IMAGE :=arch/s390/boot/image
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@ -488,7 +488,9 @@ startup:
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.align 16
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2: .long 0x000a0000,0x8badcccc
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#if defined(CONFIG_64BIT)
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#if defined(CONFIG_MARCH_Z10)
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#if defined(CONFIG_MARCH_Z196)
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.long 0xc100efe3, 0xf46c0000
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#elif defined(CONFIG_MARCH_Z10)
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.long 0xc100efe3, 0xf0680000
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#elif defined(CONFIG_MARCH_Z9_109)
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.long 0xc100efc3, 0x00000000
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@ -498,7 +500,9 @@ startup:
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.long 0xc0000000, 0x00000000
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#endif
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#else
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#if defined(CONFIG_MARCH_Z10)
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#if defined(CONFIG_MARCH_Z196)
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.long 0x8100c880, 0x00000000
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#elif defined(CONFIG_MARCH_Z10)
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.long 0x8100c880, 0x00000000
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#elif defined(CONFIG_MARCH_Z9_109)
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.long 0x8100c880, 0x00000000
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