54d46ea993
Pull signal handling cleanups from Al Viro: "sigaltstack infrastructure + conversion for x86, alpha and um, COMPAT_SYSCALL_DEFINE infrastructure. Note that there are several conflicts between "unify SS_ONSTACK/SS_DISABLE definitions" and UAPI patches in mainline; resolution is trivial - just remove definitions of SS_ONSTACK and SS_DISABLED from arch/*/uapi/asm/signal.h; they are all identical and include/uapi/linux/signal.h contains the unified variant." Fixed up conflicts as per Al. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: alpha: switch to generic sigaltstack new helpers: __save_altstack/__compat_save_altstack, switch x86 and um to those generic compat_sys_sigaltstack() introduce generic sys_sigaltstack(), switch x86 and um to it new helper: compat_user_stack_pointer() new helper: restore_altstack() unify SS_ONSTACK/SS_DISABLE definitions new helper: current_user_stack_pointer() missing user_stack_pointer() instances Bury the conditionals from kernel_thread/kernel_execve series COMPAT_SYSCALL_DEFINE: infrastructure
65 lines
1.3 KiB
Plaintext
65 lines
1.3 KiB
Plaintext
mainmenu "User Mode Linux/$SUBARCH $KERNELVERSION Kernel Configuration"
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source "arch/um/Kconfig.common"
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menu "UML-specific options"
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menu "Host processor type and features"
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source "arch/x86/Kconfig.cpu"
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endmenu
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config UML_X86
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def_bool y
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select GENERIC_FIND_FIRST_BIT
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select GENERIC_SIGALTSTACK
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config 64BIT
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bool "64-bit kernel" if SUBARCH = "x86"
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default SUBARCH != "i386"
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config X86_32
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def_bool !64BIT
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select HAVE_AOUT
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select ARCH_WANT_IPC_PARSE_VERSION
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select MODULES_USE_ELF_REL
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select CLONE_BACKWARDS
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config X86_64
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def_bool 64BIT
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select MODULES_USE_ELF_RELA
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config RWSEM_XCHGADD_ALGORITHM
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def_bool 64BIT
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config RWSEM_GENERIC_SPINLOCK
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def_bool !RWSEM_XCHGADD_ALGORITHM
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config 3_LEVEL_PGTABLES
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bool "Three-level pagetables (EXPERIMENTAL)" if !64BIT
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default 64BIT
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depends on EXPERIMENTAL
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help
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Three-level pagetables will let UML have more than 4G of physical
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memory. All the memory that can't be mapped directly will be treated
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as high memory.
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However, this it experimental on 32-bit architectures, so if unsure say
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N (on x86-64 it's automatically enabled, instead, as it's safe there).
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config ARCH_HAS_SC_SIGNALS
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def_bool !64BIT
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config ARCH_REUSE_HOST_VSYSCALL_AREA
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def_bool !64BIT
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config GENERIC_HWEIGHT
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def_bool y
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source "arch/um/Kconfig.um"
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endmenu
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source "arch/um/Kconfig.rest"
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