diff options
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/Kconfig | 210 | ||||
| -rw-r--r-- | arch/um/Kconfig.common | 60 | ||||
| -rw-r--r-- | arch/um/Kconfig.rest | 22 | ||||
| -rw-r--r-- | arch/um/Kconfig.um | 124 |
4 files changed, 210 insertions, 206 deletions
diff --git a/arch/um/Kconfig b/arch/um/Kconfig index 76b4a32c9f42..69fa01a4a81b 100644 --- a/arch/um/Kconfig +++ b/arch/um/Kconfig @@ -1,3 +1,213 @@ # SPDX-License-Identifier: GPL-2.0 +menu "UML-specific options" + +config UML + bool + default y + select ARCH_HAS_KCOV + select HAVE_ARCH_AUDITSYSCALL + select HAVE_ARCH_SECCOMP_FILTER + select HAVE_UID16 + select HAVE_FUTEX_CMPXCHG if FUTEX + select HAVE_DEBUG_KMEMLEAK + select GENERIC_IRQ_SHOW + select GENERIC_CPU_DEVICES + select GENERIC_CLOCKEVENTS + select HAVE_GCC_PLUGINS + select TTY # Needed for line.c + +config MMU + bool + default y + +config NO_IOMEM + def_bool y + +config ISA + bool + +config SBUS + bool + +config PCI + bool + +config PCMCIA + bool + +config TRACE_IRQFLAGS_SUPPORT + bool + default y + +config LOCKDEP_SUPPORT + bool + default y + +config STACKTRACE_SUPPORT + bool + default y + select STACKTRACE + +config GENERIC_CALIBRATE_DELAY + bool + default y + +config HZ + int + default 100 + +config NR_CPUS + int + range 1 1 + default 1 + source "arch/$(HEADER_ARCH)/um/Kconfig" + +config STATIC_LINK + bool "Force a static link" + default n + help + This option gives you the ability to force a static link of UML. + Normally, UML is linked as a shared binary. This is inconvenient for + use in a chroot jail. So, if you intend to run UML inside a chroot, + you probably want to say Y here. + Additionally, this option enables using higher memory spaces (up to + 2.75G) for UML. + +source "mm/Kconfig" + +config LD_SCRIPT_STATIC + bool + default y + depends on STATIC_LINK + +config LD_SCRIPT_DYN + bool + default y + depends on !LD_SCRIPT_STATIC + select MODULE_REL_CRCS if MODVERSIONS + +source "fs/Kconfig.binfmt" + +config HOSTFS + tristate "Host filesystem" + help + While the User-Mode Linux port uses its own root file system for + booting and normal file access, this module lets the UML user + access files stored on the host. It does not require any + network connection between the Host and UML. An example use of + this might be: + + mount none /tmp/fromhost -t hostfs -o /tmp/umlshare + + where /tmp/fromhost is an empty directory inside UML and + /tmp/umlshare is a directory on the host with files the UML user + wishes to access. + + For more information, see + <http://user-mode-linux.sourceforge.net/hostfs.html>. + + If you'd like to be able to work with files stored on the host, + say Y or M here; otherwise say N. + +config MCONSOLE + bool "Management console" + depends on PROC_FS + default y + help + The user mode linux management console is a low-level interface to + the kernel, somewhat like the i386 SysRq interface. Since there is + a full-blown operating system running under every user mode linux + instance, there is much greater flexibility possible than with the + SysRq mechanism. + + If you answer 'Y' to this option, to use this feature, you need the + mconsole client (called uml_mconsole) which is present in CVS in + 2.4.5-9um and later (path /tools/mconsole), and is also in the + distribution RPM package in 2.4.6 and later. + + It is safe to say 'Y' here. + +config MAGIC_SYSRQ + bool "Magic SysRq key" + depends on MCONSOLE + help + If you say Y here, you will have some control over the system even + if the system crashes for example during kernel debugging (e.g., you + will be able to flush the buffer cache to disk, reboot the system + immediately or dump some status information). A key for each of the + possible requests is provided. + + This is the feature normally accomplished by pressing a key + while holding SysRq (Alt+PrintScreen). + + On UML, this is accomplished by sending a "sysrq" command with + mconsole, followed by the letter for the requested command. + + The keys are documented in <file:Documentation/admin-guide/sysrq.rst>. Don't say Y + unless you really know what this hack does. + +config KERNEL_STACK_ORDER + int "Kernel stack size order" + default 1 if 64BIT + range 1 10 if 64BIT + default 0 if !64BIT + help + This option determines the size of UML kernel stacks. They will + be 1 << order pages. The default is OK unless you're running Valgrind + on UML, in which case, set this to 3. + +config MMAPPER + tristate "iomem emulation driver" + help + This driver allows a host file to be used as emulated IO memory inside + UML. + +config NO_DMA + def_bool y + +config PGTABLE_LEVELS + int + default 3 if 3_LEVEL_PGTABLES + default 2 + +config SECCOMP + def_bool y + prompt "Enable seccomp to safely compute untrusted bytecode" + ---help--- + This kernel feature is useful for number crunching applications + that may need to compute untrusted bytecode during their + execution. By using pipes or other transports made available to + the process as file descriptors supporting the read/write + syscalls, it's possible to isolate those applications in + their own address space using seccomp. Once seccomp is + enabled via prctl(PR_SET_SECCOMP), it cannot be disabled + and the task is only allowed to execute a few safe syscalls + defined by each seccomp mode. + + If unsure, say Y. + +endmenu + +source "init/Kconfig" + +source "kernel/Kconfig.freezer" + +source "arch/um/Kconfig.char" + +source "drivers/Kconfig" + +source "net/Kconfig" + +source "arch/um/Kconfig.net" + +source "fs/Kconfig" + +source "security/Kconfig" + +source "crypto/Kconfig" + +source "lib/Kconfig" + +source "arch/um/Kconfig.debug" diff --git a/arch/um/Kconfig.common b/arch/um/Kconfig.common deleted file mode 100644 index 07f84c842cc3..000000000000 --- a/arch/um/Kconfig.common +++ /dev/null @@ -1,60 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -config UML - bool - default y - select ARCH_HAS_KCOV - select HAVE_ARCH_AUDITSYSCALL - select HAVE_ARCH_SECCOMP_FILTER - select HAVE_UID16 - select HAVE_FUTEX_CMPXCHG if FUTEX - select HAVE_DEBUG_KMEMLEAK - select GENERIC_IRQ_SHOW - select GENERIC_CPU_DEVICES - select GENERIC_CLOCKEVENTS - select HAVE_GCC_PLUGINS - select TTY # Needed for line.c - -config MMU - bool - default y - -config NO_IOMEM - def_bool y - -config ISA - bool - -config SBUS - bool - -config PCI - bool - -config PCMCIA - bool - -config TRACE_IRQFLAGS_SUPPORT - bool - default y - -config LOCKDEP_SUPPORT - bool - default y - -config STACKTRACE_SUPPORT - bool - default y - select STACKTRACE - -config GENERIC_CALIBRATE_DELAY - bool - default y - -config HZ - int - default 100 - -config NR_CPUS - int - range 1 1 - default 1 diff --git a/arch/um/Kconfig.rest b/arch/um/Kconfig.rest deleted file mode 100644 index 08327b9c0cbe..000000000000 --- a/arch/um/Kconfig.rest +++ /dev/null @@ -1,22 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -source "init/Kconfig" - -source "kernel/Kconfig.freezer" - -source "arch/um/Kconfig.char" - -source "drivers/Kconfig" - -source "net/Kconfig" - -source "arch/um/Kconfig.net" - -source "fs/Kconfig" - -source "security/Kconfig" - -source "crypto/Kconfig" - -source "lib/Kconfig" - -source "arch/um/Kconfig.debug" diff --git a/arch/um/Kconfig.um b/arch/um/Kconfig.um deleted file mode 100644 index 20da5a8ca949..000000000000 --- a/arch/um/Kconfig.um +++ /dev/null @@ -1,124 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -config STATIC_LINK - bool "Force a static link" - default n - help - This option gives you the ability to force a static link of UML. - Normally, UML is linked as a shared binary. This is inconvenient for - use in a chroot jail. So, if you intend to run UML inside a chroot, - you probably want to say Y here. - Additionally, this option enables using higher memory spaces (up to - 2.75G) for UML. - -source "mm/Kconfig" - -config LD_SCRIPT_STATIC - bool - default y - depends on STATIC_LINK - -config LD_SCRIPT_DYN - bool - default y - depends on !LD_SCRIPT_STATIC - select MODULE_REL_CRCS if MODVERSIONS - -source "fs/Kconfig.binfmt" - -config HOSTFS - tristate "Host filesystem" - help - While the User-Mode Linux port uses its own root file system for - booting and normal file access, this module lets the UML user - access files stored on the host. It does not require any - network connection between the Host and UML. An example use of - this might be: - - mount none /tmp/fromhost -t hostfs -o /tmp/umlshare - - where /tmp/fromhost is an empty directory inside UML and - /tmp/umlshare is a directory on the host with files the UML user - wishes to access. - - For more information, see - <http://user-mode-linux.sourceforge.net/hostfs.html>. - - If you'd like to be able to work with files stored on the host, - say Y or M here; otherwise say N. - -config MCONSOLE - bool "Management console" - depends on PROC_FS - default y - help - The user mode linux management console is a low-level interface to - the kernel, somewhat like the i386 SysRq interface. Since there is - a full-blown operating system running under every user mode linux - instance, there is much greater flexibility possible than with the - SysRq mechanism. - - If you answer 'Y' to this option, to use this feature, you need the - mconsole client (called uml_mconsole) which is present in CVS in - 2.4.5-9um and later (path /tools/mconsole), and is also in the - distribution RPM package in 2.4.6 and later. - - It is safe to say 'Y' here. - -config MAGIC_SYSRQ - bool "Magic SysRq key" - depends on MCONSOLE - help - If you say Y here, you will have some control over the system even - if the system crashes for example during kernel debugging (e.g., you - will be able to flush the buffer cache to disk, reboot the system - immediately or dump some status information). A key for each of the - possible requests is provided. - - This is the feature normally accomplished by pressing a key - while holding SysRq (Alt+PrintScreen). - - On UML, this is accomplished by sending a "sysrq" command with - mconsole, followed by the letter for the requested command. - - The keys are documented in <file:Documentation/admin-guide/sysrq.rst>. Don't say Y - unless you really know what this hack does. - -config KERNEL_STACK_ORDER - int "Kernel stack size order" - default 1 if 64BIT - range 1 10 if 64BIT - default 0 if !64BIT - help - This option determines the size of UML kernel stacks. They will - be 1 << order pages. The default is OK unless you're running Valgrind - on UML, in which case, set this to 3. - -config MMAPPER - tristate "iomem emulation driver" - help - This driver allows a host file to be used as emulated IO memory inside - UML. - -config NO_DMA - def_bool y - -config PGTABLE_LEVELS - int - default 3 if 3_LEVEL_PGTABLES - default 2 - -config SECCOMP - def_bool y - prompt "Enable seccomp to safely compute untrusted bytecode" - ---help--- - This kernel feature is useful for number crunching applications - that may need to compute untrusted bytecode during their - execution. By using pipes or other transports made available to - the process as file descriptors supporting the read/write - syscalls, it's possible to isolate those applications in - their own address space using seccomp. Once seccomp is - enabled via prctl(PR_SET_SECCOMP), it cannot be disabled - and the task is only allowed to execute a few safe syscalls - defined by each seccomp mode. - - If unsure, say Y. |