Commit f861e405 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
Browse files

[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: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 7aca2eda

arch/s390/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -287,6 +287,14 @@ config MARCH_Z10 
	  machines such as the z990, z890, z900, z800, z9-109, z9-ec

	  and z9-bc.



config MARCH_Z196

	bool "IBM zEnterprise 196"

	help

	  Select this to enable optimizations for IBM zEnterprise 196.

	  The kernel will be slightly faster but will not work on older

	  machines such as the z990, z890, z900, z800, z9-109, z9-ec,

	  z9-bc, z10-ec and z10-bc.



endchoice



config PACK_STACK

arch/s390/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900) 
cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)

cflags-$(CONFIG_MARCH_Z9_109) += $(call cc-option,-march=z9-109)

cflags-$(CONFIG_MARCH_Z10) += $(call cc-option,-march=z10)

cflags-$(CONFIG_MARCH_Z196) += $(call cc-option,-march=z196)



#KBUILD_IMAGE is necessary for make rpm

KBUILD_IMAGE	:=arch/s390/boot/image

arch/s390/kernel/head.S

+6 −2
Original line number Diff line number Diff line
@@ -488,7 +488,9 @@ startup: 
	.align 16

2:	.long	0x000a0000,0x8badcccc

#if defined(CONFIG_64BIT)

#if defined(CONFIG_MARCH_Z10)

#if defined(CONFIG_MARCH_Z196)

	.long 0xc100efe3, 0xf46c0000

#elif defined(CONFIG_MARCH_Z10)

	.long 0xc100efe3, 0xf0680000

#elif defined(CONFIG_MARCH_Z9_109)

	.long 0xc100efc3, 0x00000000
@@ -498,7 +500,9 @@ startup: 
	.long 0xc0000000, 0x00000000

#endif

#else

#if defined(CONFIG_MARCH_Z10)

#if defined(CONFIG_MARCH_Z196)

	.long 0x8100c880, 0x00000000

#elif defined(CONFIG_MARCH_Z10)

	.long 0x8100c880, 0x00000000

#elif defined(CONFIG_MARCH_Z9_109)

	.long 0x8100c880, 0x00000000