mirror of
https://github.com/edk2-porting/linux-next.git
synced 2025-01-04 03:33:58 +08:00
942fa985e9
All new 32-bit architectures should have 64-bit userspace off_t type, but existing architectures has 32-bit ones. To enforce the rule, new config option is added to arch/Kconfig that defaults ARCH_32BIT_OFF_T to be disabled for new 32-bit architectures. All existing 32-bit architectures enable it explicitly. New option affects force_o_largefile() behaviour. Namely, if userspace off_t is 64-bits long, we have no reason to reject user to open big files. Note that even if architectures has only 64-bit off_t in the kernel (arc, c6x, h8300, hexagon, nios2, openrisc, and unicore32), a libc may use 32-bit off_t, and therefore want to limit the file size to 4GB unless specified differently in the open flags. Signed-off-by: Yury Norov <ynorov@caviumnetworks.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Yury Norov <ynorov@marvell.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
61 lines
1.3 KiB
Plaintext
61 lines
1.3 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0
|
|
|
|
menu "Host processor type and features"
|
|
|
|
source "arch/x86/Kconfig.cpu"
|
|
|
|
endmenu
|
|
|
|
config UML_X86
|
|
def_bool y
|
|
select GENERIC_FIND_FIRST_BIT
|
|
|
|
config 64BIT
|
|
bool "64-bit kernel" if "$(SUBARCH)" = "x86"
|
|
default "$(SUBARCH)" != "i386"
|
|
|
|
config X86_32
|
|
def_bool !64BIT
|
|
select HAVE_AOUT
|
|
select ARCH_32BIT_OFF_T
|
|
select ARCH_WANT_IPC_PARSE_VERSION
|
|
select MODULES_USE_ELF_REL
|
|
select CLONE_BACKWARDS
|
|
select OLD_SIGSUSPEND3
|
|
select OLD_SIGACTION
|
|
|
|
config X86_64
|
|
def_bool 64BIT
|
|
select MODULES_USE_ELF_RELA
|
|
|
|
config ARCH_DEFCONFIG
|
|
string
|
|
default "arch/um/configs/i386_defconfig" if X86_32
|
|
default "arch/um/configs/x86_64_defconfig" if X86_64
|
|
|
|
config RWSEM_XCHGADD_ALGORITHM
|
|
def_bool 64BIT
|
|
|
|
config RWSEM_GENERIC_SPINLOCK
|
|
def_bool !RWSEM_XCHGADD_ALGORITHM
|
|
|
|
config 3_LEVEL_PGTABLES
|
|
bool "Three-level pagetables" if !64BIT
|
|
default 64BIT
|
|
help
|
|
Three-level pagetables will let UML have more than 4G of physical
|
|
memory. All the memory that can't be mapped directly will be treated
|
|
as high memory.
|
|
|
|
However, this it experimental on 32-bit architectures, so if unsure say
|
|
N (on x86-64 it's automatically enabled, instead, as it's safe there).
|
|
|
|
config ARCH_HAS_SC_SIGNALS
|
|
def_bool !64BIT
|
|
|
|
config ARCH_REUSE_HOST_VSYSCALL_AREA
|
|
def_bool !64BIT
|
|
|
|
config GENERIC_HWEIGHT
|
|
def_bool y
|