diff options
Diffstat (limited to 'arch/s390/Kconfig')
| -rw-r--r-- | arch/s390/Kconfig | 51 |
1 files changed, 39 insertions, 12 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 583d9ff0a571..eaed402ad346 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -22,11 +22,15 @@ config RWSEM_XCHGADD_ALGORITHM bool default y -config GENERIC_HWEIGHT +config ARCH_HAS_ILOG2_U32 bool - default y + default n + +config ARCH_HAS_ILOG2_U64 + bool + default n -config GENERIC_CALIBRATE_DELAY +config GENERIC_HWEIGHT bool default y @@ -126,6 +130,31 @@ config AUDIT_ARCH bool default y +config S390_SWITCH_AMODE + bool "Switch kernel/user addressing modes" + help + This option allows to switch the addressing modes of kernel and user + space. The kernel parameter switch_amode=on will enable this feature, + default is disabled. Enabling this (via kernel parameter) on machines + earlier than IBM System z9-109 EC/BC will reduce system performance. + + Note that this option will also be selected by selecting the execute + protection option below. Enabling the execute protection via the + noexec kernel parameter will also switch the addressing modes, + independent of the switch_amode kernel parameter. + + +config S390_EXEC_PROTECT + bool "Data execute protection" + select S390_SWITCH_AMODE + help + This option allows to enable a buffer overflow protection for user + space programs and it also selects the addressing mode option above. + The kernel parameter noexec=on will enable this feature and also + switch the addressing modes, default is disabled. Enabling this (via + kernel parameter) on machines earlier than IBM System z9-109 EC/BC + will reduce system performance. + comment "Code generation options" choice @@ -233,8 +262,14 @@ config WARN_STACK_SIZE This allows you to specify the maximum frame size a function may have without the compiler complaining about it. +config ARCH_POPULATES_NODE_MAP + def_bool y + source "mm/Kconfig" +config HOLES_IN_ZONE + def_bool y + comment "I/O subsystem configuration" config MACHCHK_WARNING @@ -258,14 +293,6 @@ config QDIO If unsure, say Y. -config QDIO_PERF_STATS - bool "Performance statistics in /proc" - depends on QDIO - help - Say Y here to get performance statistics in /proc/qdio_perf - - If unsure, say N. - config QDIO_DEBUG bool "Extended debugging information" depends on QDIO @@ -401,7 +428,7 @@ config APPLDATA_BASE config APPLDATA_MEM tristate "Monitor memory management statistics" - depends on APPLDATA_BASE + depends on APPLDATA_BASE && VM_EVENT_COUNTERS help This provides memory management related data to the Linux - VM Monitor Stream, like paging/swapping rate, memory utilisation, etc. |
