path: root/arch/s390/Kconfig
diff options
authorMartin Schwidefsky <schwidefsky@de.ibm.com>2009-12-07 12:51:43 +0100
committerMartin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com>2009-12-07 12:51:33 +0100
commitb11b53342773361f3353b285eb6a3fd6074e7997 (patch)
treeb7fda314933b82d39cb8d30c7882ca3044dd0367 /arch/s390/Kconfig
parent61365e132ef987f7719af5d2e434db4465957637 (diff)
[S390] Improve address space mode selection.
Introduce user_mode to replace the two variables switch_amode and s390_noexec. There are three valid combinations of the old values: 1) switch_amode == 0 && s390_noexec == 0 2) switch_amode == 1 && s390_noexec == 0 3) switch_amode == 1 && s390_noexec == 1 They get replaced by 1) user_mode == HOME_SPACE_MODE 2) user_mode == PRIMARY_SPACE_MODE 3) user_mode == SECONDARY_SPACE_MODE The new kernel parameter user_mode=[primary,secondary,home] lets you choose the address space mode the user space processes should use. In addition the CONFIG_S390_SWITCH_AMODE config option is removed. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/Kconfig')
1 files changed, 0 insertions, 15 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 16c673096a2..c80235206c0 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -220,23 +220,8 @@ config AUDIT_ARCH
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
This option allows to enable a buffer overflow protection for user
space programs and it also selects the addressing mode option above.