Endianness depends on CPU architecture. CONFIG_CPU_(BIG/LITTLE)_ENDIAN should
be enabled on target or subtarget based on SoC architecture.
Fixes warning:
$ make kernel_oldconfig CONFIG_TARGET=subtarget
...
.config:1008:warning: override: CPU_LITTLE_ENDIAN changes choice state
....
Summary:
- ARC - only the CONFIG_CPU_BIG_ENDIAN symbol is defined for this architeture.
If it is disabled then the processor operates in LITTLE_ENDIAN mode (default),
- ARM32 - CONFIG_CPU_LITTLE_ENDIAN symbol available since kernel 5.19. This
option should be enabled after OpenWRT moves to kernel 6.x. After refreshing
the kernel, the symbol disappears,
- ARM64 - enabled CONFIG_CPU_LITTLE_ENDIAN,
- MIPS - enabled relevant symbols,
- POWERPC - enabled CONFIG_CPU_BIG_ENDIAN,
- UML - Symbols are not defined for this architecture,
- X86 - always little endian. Symbols are not defined for this architecture.
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Drop autogenerated kernel config options. These aren't needed to build and
can obscure options relevant to the subtarget.
Signed-off-by: Tony Ambardar <itugrok@yahoo.com>
Usage of current R1 ISA is inconsistent with the MIPS32 subtarget, little
used and has limited utility for testing.
Many distros target a minimum R2 ISA. Debian MIPS 32-bit/64-bit ports all
use MIPS R2 ISA since Stretch, for example. Fedora's MIPS arch also targets
the R2 ISA for 32-bit/64-bit.
Widely used MIPS64 platforms like Octeon are based on the MIPS R2 ISA or
later, and benefit from having a compatible test platform in OpenWRT.
While Linux does support MIPS64 R1 targets, its usefulness for development
and testing is limited. As an example, the modern Linux eBPF JIT requires
a MIPS R2 ISA or later.
Signed-off-by: Tony Ambardar <itugrok@yahoo.com>
[Refresh config and fix README]
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
It is deactivated everywhere, just set this in the generic config.
Acked-by: Yousong Zhou <yszhou4tech@gmail.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This refreshes the kernel configuration on top of kernel 5.4.
It now builds without asking to select some kernel options on all 4
subtargets.
It still does not boot up, there is a different problem.
Tested-By: Yousong Zhou <yszhou4tech@gmail.com>
Acked-By: Yousong Zhou <yszhou4tech@gmail.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
OpenWrt is completely compiled from sources using a 64 bit compiler, we
do not need support for the old 32 bit MIPS interface on 64 Bit CPUs,
deactivate it.
Fixes: 46af22de16 ("kernel: Remove CONFIG_COMPAT")
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This removes support for executing old 32 bit applications on 64 bit ARM
and MIPS kernels.
On OpenWrt we normally compile all the user space applications on our
own and do not support third party binary only modules especial not 32
bit applications on 64 bit CPUs.
This reduces the attack surface on such systems and should also save
some memory.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
These two subtargets are used to build a 64-bit malta kernel along with
64-bit userland support.
Signed-off-by: Florian Fainelli <florian@openwrt.org>
SVN-Revision: 36211
