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authorHeiko Carstens <heiko.carstens@de.ibm.com>2015-02-12 13:08:27 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2015-03-25 11:49:33 +0100
commit5a79859ae0f35d25c67a03e82bf0c80592f16a39 (patch)
tree37264d49f069812f19ced94e6ae171814fb7e498 /arch/s390/Kconfig
parent1833c9f647e9bda1cd24653ff8f9c207b5f5b911 (diff)
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s390: remove 31 bit support
Remove the 31 bit support in order to reduce maintenance cost and effectively remove dead code. Since a couple of years there is no distribution left that comes with a 31 bit kernel. The 31 bit kernel also has been broken since more than a year before anybody noticed. In addition I added a removal warning to the kernel shown at ipl for 5 minutes: a960062e5826 ("s390: add 31 bit warning message") which let everybody know about the plan to remove 31 bit code. We didn't get any response. Given that the last 31 bit only machine was introduced in 1999 let's remove the code. Anybody with 31 bit user space code can still use the compat mode. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/Kconfig')
-rw-r--r--arch/s390/Kconfig79
1 files changed, 21 insertions, 58 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 373cd5badf1c..1de26e1c48ac 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -35,7 +35,7 @@ config GENERIC_BUG_RELATIVE_POINTERS
def_bool y
config ARCH_DMA_ADDR_T_64BIT
- def_bool 64BIT
+ def_bool y
config GENERIC_LOCKBREAK
def_bool y if SMP && PREEMPT
@@ -59,7 +59,7 @@ config PCI_QUIRKS
def_bool n
config ARCH_SUPPORTS_UPROBES
- def_bool 64BIT
+ def_bool y
config S390
def_bool y
@@ -110,19 +110,19 @@ config S390
select GENERIC_TIME_VSYSCALL
select HAVE_ALIGNED_STRUCT_PAGE if SLUB
select HAVE_ARCH_AUDITSYSCALL
- select HAVE_ARCH_JUMP_LABEL if !MARCH_G5
+ select HAVE_ARCH_JUMP_LABEL
select HAVE_ARCH_SECCOMP_FILTER
select HAVE_ARCH_TRACEHOOK
- select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT
- select HAVE_BPF_JIT if 64BIT && PACK_STACK
+ select HAVE_ARCH_TRANSPARENT_HUGEPAGE
+ select HAVE_BPF_JIT if PACK_STACK
select HAVE_CMPXCHG_DOUBLE
select HAVE_CMPXCHG_LOCAL
select HAVE_DEBUG_KMEMLEAK
- select HAVE_DYNAMIC_FTRACE if 64BIT
- select HAVE_DYNAMIC_FTRACE_WITH_REGS if 64BIT
+ select HAVE_DYNAMIC_FTRACE
+ select HAVE_DYNAMIC_FTRACE_WITH_REGS
select HAVE_FTRACE_MCOUNT_RECORD
- select HAVE_FUNCTION_GRAPH_TRACER if 64BIT
- select HAVE_FUNCTION_TRACER if 64BIT
+ select HAVE_FUNCTION_GRAPH_TRACER
+ select HAVE_FUNCTION_TRACER
select HAVE_FUTEX_CMPXCHG if FUTEX
select HAVE_KERNEL_BZIP2
select HAVE_KERNEL_GZIP
@@ -132,7 +132,7 @@ config S390
select HAVE_KERNEL_XZ
select HAVE_KPROBES
select HAVE_KRETPROBES
- select HAVE_KVM if 64BIT
+ select HAVE_KVM
select HAVE_MEMBLOCK
select HAVE_MEMBLOCK_NODE_MAP
select HAVE_MEMBLOCK_PHYS_MAP
@@ -141,7 +141,6 @@ config S390
select HAVE_PERF_EVENTS
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_SYSCALL_TRACEPOINTS
- select HAVE_UID16 if 32BIT
select HAVE_VIRT_CPU_ACCOUNTING
select MODULES_USE_ELF_RELA
select NO_BOOTMEM
@@ -190,18 +189,11 @@ config HAVE_MARCH_Z13_FEATURES
choice
prompt "Processor type"
- default MARCH_G5
-
-config MARCH_G5
- bool "System/390 model G5 and G6"
- depends on !64BIT
- help
- Select this to build a 31 bit kernel that works
- on all ESA/390 and z/Architecture machines.
+ default MARCH_Z900
config MARCH_Z900
bool "IBM zSeries model z800 and z900"
- select HAVE_MARCH_Z900_FEATURES if 64BIT
+ select HAVE_MARCH_Z900_FEATURES
help
Select this to enable optimizations for model z800/z900 (2064 and
2066 series). This will enable some optimizations that are not
@@ -209,7 +201,7 @@ config MARCH_Z900
config MARCH_Z990
bool "IBM zSeries model z890 and z990"
- select HAVE_MARCH_Z990_FEATURES if 64BIT
+ select HAVE_MARCH_Z990_FEATURES
help
Select this to enable optimizations for model z890/z990 (2084 and
2086 series). The kernel will be slightly faster but will not work
@@ -217,7 +209,7 @@ config MARCH_Z990
config MARCH_Z9_109
bool "IBM System z9"
- select HAVE_MARCH_Z9_109_FEATURES if 64BIT
+ select HAVE_MARCH_Z9_109_FEATURES
help
Select this to enable optimizations for IBM System z9 (2094 and
2096 series). The kernel will be slightly faster but will not work
@@ -225,7 +217,7 @@ config MARCH_Z9_109
config MARCH_Z10
bool "IBM System z10"
- select HAVE_MARCH_Z10_FEATURES if 64BIT
+ select HAVE_MARCH_Z10_FEATURES
help
Select this to enable optimizations for IBM System z10 (2097 and
2098 series). The kernel will be slightly faster but will not work
@@ -233,7 +225,7 @@ config MARCH_Z10
config MARCH_Z196
bool "IBM zEnterprise 114 and 196"
- select HAVE_MARCH_Z196_FEATURES if 64BIT
+ select HAVE_MARCH_Z196_FEATURES
help
Select this to enable optimizations for IBM zEnterprise 114 and 196
(2818 and 2817 series). The kernel will be slightly faster but will
@@ -241,7 +233,7 @@ config MARCH_Z196
config MARCH_ZEC12
bool "IBM zBC12 and zEC12"
- select HAVE_MARCH_ZEC12_FEATURES if 64BIT
+ select HAVE_MARCH_ZEC12_FEATURES
help
Select this to enable optimizations for IBM zBC12 and zEC12 (2828 and
2827 series). The kernel will be slightly faster but will not work on
@@ -249,7 +241,7 @@ config MARCH_ZEC12
config MARCH_Z13
bool "IBM z13"
- select HAVE_MARCH_Z13_FEATURES if 64BIT
+ select HAVE_MARCH_Z13_FEATURES
help
Select this to enable optimizations for IBM z13 (2964 series).
The kernel will be slightly faster but will not work on older
@@ -257,9 +249,6 @@ config MARCH_Z13
endchoice
-config MARCH_G5_TUNE
- def_bool TUNE_G5 || MARCH_G5 && TUNE_DEFAULT
-
config MARCH_Z900_TUNE
def_bool TUNE_Z900 || MARCH_Z900 && TUNE_DEFAULT
@@ -298,9 +287,6 @@ config TUNE_DEFAULT
Tune the generated code for the target processor for which the kernel
will be compiled.
-config TUNE_G5
- bool "System/390 model G5 and G6"
-
config TUNE_Z900
bool "IBM zSeries model z800 and z900"
@@ -326,18 +312,10 @@ endchoice
config 64BIT
def_bool y
- prompt "64 bit kernel"
- help
- Select this option if you have an IBM z/Architecture machine
- and want to use the 64 bit addressing mode.
-
-config 32BIT
- def_bool y if !64BIT
config COMPAT
def_bool y
prompt "Kernel support for 31 bit emulation"
- depends on 64BIT
select COMPAT_BINFMT_ELF if BINFMT_ELF
select ARCH_WANT_OLD_COMPAT_IPC
select COMPAT_OLD_SIGACTION
@@ -376,8 +354,7 @@ config NR_CPUS
int "Maximum number of CPUs (2-512)"
range 2 512
depends on SMP
- default "32" if !64BIT
- default "64" if 64BIT
+ default "64"
help
This allows you to specify the maximum number of CPUs which this
kernel will support. The maximum supported value is 512 and the
@@ -418,15 +395,6 @@ config SCHED_TOPOLOGY
source kernel/Kconfig.preempt
-config MATHEMU
- def_bool y
- prompt "IEEE FPU emulation"
- depends on MARCH_G5
- help
- This option is required for IEEE compliant floating point arithmetic
- on older ESA/390 machines. Say Y unless you know your machine doesn't
- need this.
-
source kernel/Kconfig.hz
endmenu
@@ -437,7 +405,6 @@ config ARCH_SPARSEMEM_ENABLE
def_bool y
select SPARSEMEM_VMEMMAP_ENABLE
select SPARSEMEM_VMEMMAP
- select SPARSEMEM_STATIC if !64BIT
config ARCH_SPARSEMEM_DEFAULT
def_bool y
@@ -453,7 +420,6 @@ config ARCH_ENABLE_MEMORY_HOTREMOVE
config ARCH_ENABLE_SPLIT_PMD_PTLOCK
def_bool y
- depends on 64BIT
config FORCE_MAX_ZONEORDER
int
@@ -528,7 +494,6 @@ config QDIO
menuconfig PCI
bool "PCI support"
- depends on 64BIT
select HAVE_DMA_ATTRS
select PCI_MSI
help
@@ -598,7 +563,6 @@ config CHSC_SCH
config SCM_BUS
def_bool y
- depends on 64BIT
prompt "SCM bus driver"
help
Bus driver for Storage Class Memory.
@@ -620,7 +584,7 @@ menu "Dump support"
config CRASH_DUMP
bool "kernel crash dumps"
- depends on 64BIT && SMP
+ depends on SMP
select KEXEC
help
Generate crash dump after being started by kexec.
@@ -659,7 +623,7 @@ endmenu
menu "Power Management"
config ARCH_HIBERNATION_POSSIBLE
- def_bool y if 64BIT
+ def_bool y
source "kernel/power/Kconfig"
@@ -810,7 +774,6 @@ source "arch/s390/kvm/Kconfig"
config S390_GUEST
def_bool y
prompt "s390 support for virtio devices"
- depends on 64BIT
select TTY
select VIRTUALIZATION
select VIRTIO