forked from luck/tmp_suning_uos_patched
f56e65dff6
Pull initial set_fs() removal from Al Viro:
"Christoph's set_fs base series + fixups"
* 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
fs: Allow a NULL pos pointer to __kernel_read
fs: Allow a NULL pos pointer to __kernel_write
powerpc: remove address space overrides using set_fs()
powerpc: use non-set_fs based maccess routines
x86: remove address space overrides using set_fs()
x86: make TASK_SIZE_MAX usable from assembly code
x86: move PAGE_OFFSET, TASK_SIZE & friends to page_{32,64}_types.h
lkdtm: remove set_fs-based tests
test_bitmap: remove user bitmap tests
uaccess: add infrastructure for kernel builds with set_fs()
fs: don't allow splice read/write without explicit ops
fs: don't allow kernel reads and writes without iter ops
sysctl: Convert to iter interfaces
proc: add a read_iter method to proc proc_ops
proc: cleanup the compat vs no compat file ops
proc: remove a level of indentation in proc_get_inode
195 lines
5.1 KiB
Plaintext
195 lines
5.1 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
|
|
|
|
menu "UML-specific options"
|
|
|
|
config UML
|
|
bool
|
|
default y
|
|
select ARCH_HAS_KCOV
|
|
select ARCH_NO_PREEMPT
|
|
select HAVE_ARCH_AUDITSYSCALL
|
|
select HAVE_ARCH_SECCOMP_FILTER
|
|
select HAVE_ASM_MODVERSIONS
|
|
select HAVE_UID16
|
|
select HAVE_FUTEX_CMPXCHG if FUTEX
|
|
select HAVE_DEBUG_KMEMLEAK
|
|
select HAVE_DEBUG_BUGVERBOSE
|
|
select NO_DMA
|
|
select GENERIC_IRQ_SHOW
|
|
select GENERIC_CPU_DEVICES
|
|
select GENERIC_CLOCKEVENTS
|
|
select HAVE_GCC_PLUGINS
|
|
select SET_FS
|
|
select TTY # Needed for line.c
|
|
|
|
config MMU
|
|
bool
|
|
default y
|
|
|
|
config NO_IOMEM
|
|
def_bool y
|
|
|
|
config ISA
|
|
bool
|
|
|
|
config SBUS
|
|
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 MAY_HAVE_RUNTIME_DEPS
|
|
bool
|
|
|
|
config STATIC_LINK
|
|
bool "Force a static link"
|
|
depends on CC_CAN_LINK_STATIC_NO_RUNTIME_DEPS || !MAY_HAVE_RUNTIME_DEPS
|
|
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.
|
|
|
|
NOTE: This option is incompatible with some networking features which
|
|
depend on features that require being dynamically loaded (like NSS).
|
|
|
|
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
|
|
|
|
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 2 if 64BIT
|
|
range 2 10 if 64BIT
|
|
default 1 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.
|
|
It is possible to reduce the stack to 1 for 64BIT and 0 for 32BIT on
|
|
older (pre-2017) CPUs. It is not recommended on newer CPUs due to the
|
|
increase in the size of the state which needs to be saved when handling
|
|
signals.
|
|
|
|
config MMAPPER
|
|
tristate "iomem emulation driver"
|
|
help
|
|
This driver allows a host file to be used as emulated IO memory inside
|
|
UML.
|
|
|
|
config PGTABLE_LEVELS
|
|
int
|
|
default 3 if 3_LEVEL_PGTABLES
|
|
default 2
|
|
|
|
config UML_TIME_TRAVEL_SUPPORT
|
|
bool
|
|
prompt "Support time-travel mode (e.g. for test execution)"
|
|
# inf-cpu mode is incompatible with the benchmarking
|
|
depends on !RAID6_PQ_BENCHMARK
|
|
depends on !SMP
|
|
help
|
|
Enable this option to support time travel inside the UML instance.
|
|
|
|
After enabling this option, two modes are accessible at runtime
|
|
(selected by the kernel command line), see the kernel's command-
|
|
line help for more details.
|
|
|
|
It is safe to say Y, but you probably don't need this.
|
|
|
|
endmenu
|
|
|
|
source "arch/um/drivers/Kconfig"
|