diff options
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 184 |
1 files changed, 93 insertions, 91 deletions
diff --git a/init/Kconfig b/init/Kconfig index 7d5a6fbac56a..2934249fba46 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -283,19 +283,6 @@ config CROSS_MEMORY_ATTACH to directly read from or write to another process' address space. See the man page for more details. -config FHANDLE - bool "open by fhandle syscalls" if EXPERT - select EXPORTFS - default y - help - If you say Y here, a user level program will be able to map - file names to handle and then later use the handle for - different file system operations. This is useful in implementing - userspace file servers, which now track files using handles instead - of names. The handle would remain the same even if file names - get renamed. Enables open_by_handle_at(2) and name_to_handle_at(2) - syscalls. - config USELIB bool "uselib syscall" def_bool ALPHA || M68K || SPARC || X86_32 || IA32_EMULATION @@ -883,18 +870,6 @@ config SOCK_CGROUP_DATA endif # CGROUPS -config CHECKPOINT_RESTORE - bool "Checkpoint/restore support" if EXPERT - select PROC_CHILDREN - default n - help - Enables additional kernel features in a sake of checkpoint/restore. - In particular it adds auxiliary prctl codes to setup process text, - data and heap segment sizes, and a few additional /proc filesystem - entries. - - If unsure, say N here. - menuconfig NAMESPACES bool "Namespaces support" if EXPERT depends on MULTIUSER @@ -1163,6 +1138,19 @@ config SYSCTL_SYSCALL If unsure say N here. +config FHANDLE + bool "open by fhandle syscalls" if EXPERT + select EXPORTFS + default y + help + If you say Y here, a user level program will be able to map + file names to handle and then later use the handle for + different file system operations. This is useful in implementing + userspace file servers, which now track files using handles instead + of names. The handle would remain the same even if file names + get renamed. Enables open_by_handle_at(2) and name_to_handle_at(2) + syscalls. + config POSIX_TIMERS bool "Posix Clocks & timers" if EXPERT default y @@ -1180,54 +1168,6 @@ config POSIX_TIMERS If unsure say y. -config KALLSYMS - bool "Load all symbols for debugging/ksymoops" if EXPERT - default y - help - Say Y here to let the kernel print out symbolic crash information and - symbolic stack backtraces. This increases the size of the kernel - somewhat, as all symbols have to be loaded into the kernel image. - -config KALLSYMS_ALL - bool "Include all symbols in kallsyms" - depends on DEBUG_KERNEL && KALLSYMS - help - Normally kallsyms only contains the symbols of functions for nicer - OOPS messages and backtraces (i.e., symbols from the text and inittext - sections). This is sufficient for most cases. And only in very rare - cases (e.g., when a debugger is used) all symbols are required (e.g., - names of variables from the data sections, etc). - - This option makes sure that all symbols are loaded into the kernel - image (i.e., symbols from all sections) in cost of increased kernel - size (depending on the kernel configuration, it may be 300KiB or - something like this). - - Say N unless you really need all symbols. - -config KALLSYMS_ABSOLUTE_PERCPU - bool - depends on KALLSYMS - default X86_64 && SMP - -config KALLSYMS_BASE_RELATIVE - bool - depends on KALLSYMS - default !IA64 && !(TILE && 64BIT) - help - Instead of emitting them as absolute values in the native word size, - emit the symbol references in the kallsyms table as 32-bit entries, - each containing a relative value in the range [base, base + U32_MAX] - or, when KALLSYMS_ABSOLUTE_PERCPU is in effect, each containing either - an absolute value in the range [0, S32_MAX] or a relative value in the - range [base, base + S32_MAX], where base is the lowest relative symbol - address encountered in the image. - - On 64-bit builds, this reduces the size of the address table by 50%, - but more importantly, it results in entries whose values are build - time constants, and no relocation pass is required at runtime to fix - up the entries based on the runtime load address of the kernel. - config PRINTK default y bool "Enable support for printk" if EXPERT @@ -1339,16 +1279,6 @@ config EVENTFD If unsure, say Y. -# syscall, maps, verifier -config BPF_SYSCALL - bool "Enable bpf() system call" - select ANON_INODES - select BPF - default n - help - Enable the bpf() system call that allows to manipulate eBPF - programs and maps via file descriptors. - config SHMEM bool "Use full shmem filesystem" if EXPERT default y @@ -1378,14 +1308,6 @@ config ADVISE_SYSCALLS applications use these syscalls, you can disable this option to save space. -config USERFAULTFD - bool "Enable userfaultfd() system call" - select ANON_INODES - depends on MMU - help - Enable the userfaultfd() system call that allows to intercept and - handle page faults in userland. - config MEMBARRIER bool "Enable membarrier() system call" if EXPERT default y @@ -1398,6 +1320,86 @@ config MEMBARRIER If unsure, say Y. +config CHECKPOINT_RESTORE + bool "Checkpoint/restore support" if EXPERT + select PROC_CHILDREN + default n + help + Enables additional kernel features in a sake of checkpoint/restore. + In particular it adds auxiliary prctl codes to setup process text, + data and heap segment sizes, and a few additional /proc filesystem + entries. + + If unsure, say N here. + +config KALLSYMS + bool "Load all symbols for debugging/ksymoops" if EXPERT + default y + help + Say Y here to let the kernel print out symbolic crash information and + symbolic stack backtraces. This increases the size of the kernel + somewhat, as all symbols have to be loaded into the kernel image. + +config KALLSYMS_ALL + bool "Include all symbols in kallsyms" + depends on DEBUG_KERNEL && KALLSYMS + help + Normally kallsyms only contains the symbols of functions for nicer + OOPS messages and backtraces (i.e., symbols from the text and inittext + sections). This is sufficient for most cases. And only in very rare + cases (e.g., when a debugger is used) all symbols are required (e.g., + names of variables from the data sections, etc). + + This option makes sure that all symbols are loaded into the kernel + image (i.e., symbols from all sections) in cost of increased kernel + size (depending on the kernel configuration, it may be 300KiB or + something like this). + + Say N unless you really need all symbols. + +config KALLSYMS_ABSOLUTE_PERCPU + bool + depends on KALLSYMS + default X86_64 && SMP + +config KALLSYMS_BASE_RELATIVE + bool + depends on KALLSYMS + default !IA64 && !(TILE && 64BIT) + help + Instead of emitting them as absolute values in the native word size, + emit the symbol references in the kallsyms table as 32-bit entries, + each containing a relative value in the range [base, base + U32_MAX] + or, when KALLSYMS_ABSOLUTE_PERCPU is in effect, each containing either + an absolute value in the range [0, S32_MAX] or a relative value in the + range [base, base + S32_MAX], where base is the lowest relative symbol + address encountered in the image. + + On 64-bit builds, this reduces the size of the address table by 50%, + but more importantly, it results in entries whose values are build + time constants, and no relocation pass is required at runtime to fix + up the entries based on the runtime load address of the kernel. + +# end of the "standard kernel features (expert users)" menu + +# syscall, maps, verifier +config BPF_SYSCALL + bool "Enable bpf() system call" + select ANON_INODES + select BPF + default n + help + Enable the bpf() system call that allows to manipulate eBPF + programs and maps via file descriptors. + +config USERFAULTFD + bool "Enable userfaultfd() system call" + select ANON_INODES + depends on MMU + help + Enable the userfaultfd() system call that allows to intercept and + handle page faults in userland. + config EMBEDDED bool "Embedded system" option allnoconfig_y |