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| author | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2007-02-10 13:45:43 -0600 |
|---|---|---|
| committer | James Bottomley <jejb@mulgrave.il.steeleye.com> | 2007-02-10 13:45:43 -0600 |
| commit | 81b7bbd1932a04869d4c8635a75222dfc6089f96 (patch) | |
| tree | 285ae868a1e3a41fb0dbfe346c28e380949bcb55 /arch/s390/Kconfig | |
| parent | 98051995ab44b993f992946055edc6115351f725 (diff) | |
| parent | 66efc5a7e3061c3597ac43a8bb1026488d57e66b (diff) | |
| download | linux-81b7bbd1932a04869d4c8635a75222dfc6089f96.tar.gz | |
Merge branch 'linus'
Conflicts:
drivers/scsi/ipr.c
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'arch/s390/Kconfig')
| -rw-r--r-- | arch/s390/Kconfig | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 12272361c018..eaed402ad346 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -34,10 +34,6 @@ config GENERIC_HWEIGHT bool default y -config GENERIC_CALIBRATE_DELAY - bool - default y - config GENERIC_TIME def_bool y @@ -134,6 +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 |