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Markus Stockhausen b1597c9ad4 realtek: convert RTL838x toolchain to 24kc The Realtek RTL838x devices have a MIPS 4Kec core. This has a very simple pipeline. OpenWrt uses CPU_TYPE:=4kec to honour this and adds a dedicated toolchain with some GB of extra space. There would be no problem if that toolchain would do what it is expected to do. Looking at the build process one can see: during kernel builds: ps -ef \| grep mtune ... -march=mips32r2 -mtune=34kc ... during package builds ps -ef \| grep mtune ... -mips32r2 -mtune=4kec ... So the kernel is optimized for the wrong cpu type while the applications fit fine. Explanation for this is the generic/308-mips32r2_tune.patch. This forces kernel builds to -mtune=34kc. Nevertheless everything runs fine since years on the RTL838x targets. It does not make sense to provide a dedicated 4kec toolchain for this mess. So change the setup as follows: - switch CPU type to mips24kc for RTL838x -> This drops one toolchain and saves space - Add a RTl838x specific mtune=4kec patch -> Builds kernel with the proper setting Downside is packages will be built with -mtune=24kc. So a look at a simple benchmark should give insight if this has really a big impact. See numbers attached. To sum it up in two sentences - All non RSA benchmarks are within expectation - RSA benchmarks show large deviations (before and after) The normal usecase for these switches is definetly not a CPU intensive workload so this is ok for now. Before: kernel 6.12 (mtune=34kc) + apps (mtune=4kec) root@OpenWrt:/usr/bin# ./wolfssl-benchmark ------------------------------------------------------------------------------ wolfSSL version 5.7.6 ------------------------------------------------------------------------------ wolfCrypt Benchmark (block bytes 1048576, min 1.0 sec each) RNG 5 MiB took 1.426 seconds, 3.507 MiB/s AES-128-CBC-enc 5 MiB took 1.178 seconds, 4.243 MiB/s AES-128-CBC-dec 5 MiB took 1.171 seconds, 4.270 MiB/s AES-192-CBC-enc 5 MiB took 1.307 seconds, 3.824 MiB/s AES-192-CBC-dec 5 MiB took 1.311 seconds, 3.815 MiB/s AES-256-CBC-enc 5 MiB took 1.447 seconds, 3.455 MiB/s AES-256-CBC-dec 5 MiB took 1.421 seconds, 3.519 MiB/s AES-128-GCM-enc 5 MiB took 3.772 seconds, 1.325 MiB/s AES-128-GCM-dec 5 MiB took 3.756 seconds, 1.331 MiB/s AES-192-GCM-enc 5 MiB took 3.939 seconds, 1.269 MiB/s AES-192-GCM-dec 5 MiB took 3.932 seconds, 1.272 MiB/s AES-256-GCM-enc 5 MiB took 4.043 seconds, 1.237 MiB/s AES-256-GCM-dec 5 MiB took 4.033 seconds, 1.240 MiB/s GMAC Default 2 MiB took 1.056 seconds, 1.895 MiB/s AES-128-CTR 5 MiB took 1.195 seconds, 4.185 MiB/s AES-192-CTR 5 MiB took 1.319 seconds, 3.791 MiB/s AES-256-CTR 5 MiB took 1.460 seconds, 3.425 MiB/s AES-CCM-enc 5 MiB took 2.279 seconds, 2.194 MiB/s AES-CCM-dec 5 MiB took 2.273 seconds, 2.200 MiB/s ARC4 20 MiB took 1.226 seconds, 16.315 MiB/s CHACHA 15 MiB took 1.001 seconds, 14.982 MiB/s CHA-POLY 15 MiB took 1.440 seconds, 10.416 MiB/s 3DES 5 MiB took 4.364 seconds, 1.146 MiB/s MD5 25 MiB took 1.034 seconds, 24.173 MiB/s POLY1305 35 MiB took 1.015 seconds, 34.467 MiB/s SHA 25 MiB took 1.127 seconds, 22.183 MiB/s SHA-256 10 MiB took 1.104 seconds, 9.056 MiB/s SHA-384 5 MiB took 1.324 seconds, 3.775 MiB/s SHA-512 5 MiB took 1.325 seconds, 3.774 MiB/s SHA-512/224 5 MiB took 1.319 seconds, 3.791 MiB/s SHA-512/256 5 MiB took 1.333 seconds, 3.751 MiB/s AES-128-CMAC 5 MiB took 1.145 seconds, 4.366 MiB/s AES-256-CMAC 5 MiB took 1.413 seconds, 3.539 MiB/s HMAC-MD5 25 MiB took 1.034 seconds, 24.186 MiB/s HMAC-SHA 25 MiB took 1.122 seconds, 22.272 MiB/s HMAC-SHA256 10 MiB took 1.104 seconds, 9.059 MiB/s HMAC-SHA384 5 MiB took 1.329 seconds, 3.762 MiB/s HMAC-SHA512 5 MiB took 1.323 seconds, 3.778 MiB/s PBKDF2 1 KiB took 1.018 seconds, 1.136 KiB/s RSA 2048 key gen 1 ops took 15.547 sec, avg 15547.322 ms, 0.064 ops/sec RSA 3072 key gen 1 ops took 66.131 sec, avg 66131.134 ms, 0.015 ops/sec RSA 4096 key gen 1 ops took 563.611 sec, avg 563611.230 ms, 0.002 ops/sec RSA 2048 public 200 ops took 1.403 sec, avg 7.015 ms, 142.542 ops/sec RSA 2048 private 100 ops took 39.099 sec, avg 390.991 ms, 2.558 ops/sec DH 2048 key gen 14 ops took 1.009 sec, avg 72.094 ms, 13.871 ops/sec DH 2048 agree 100 ops took 15.714 sec, avg 157.139 ms, 6.364 ops/sec ECC [ SECP256R1] 256 key gen 100 ops took 5.590 sec, avg 55.901 ms, 17.889 ops/sec ECDHE [ SECP256R1] 256 agree 100 ops took 5.555 sec, avg 55.554 ms, 18.001 ops/sec ECDSA [ SECP256R1] 256 sign 100 ops took 5.705 sec, avg 57.048 ms, 17.529 ops/sec ECDSA [ SECP256R1] 256 verify 100 ops took 4.396 sec, avg 43.963 ms, 22.746 ops/sec CURVE 25519 key gen 320 ops took 1.000 sec, avg 3.127 ms, 319.841 ops/sec CURVE 25519 agree 400 ops took 1.214 sec, avg 3.034 ms, 329.546 ops/sec Benchmark complete After: kernel 6.12 (mtune=4kec) + apps (mtune=24kc) root@OpenWrt:~# wolfssl-benchmark ------------------------------------------------------------------------------ wolfSSL version 5.7.6 ------------------------------------------------------------------------------ wolfCrypt Benchmark (block bytes 1048576, min 1.0 sec each) RNG 5 MiB took 1.428 seconds, 3.501 MiB/s AES-128-CBC-enc 5 MiB took 1.174 seconds, 4.258 MiB/s AES-128-CBC-dec 5 MiB took 1.162 seconds, 4.301 MiB/s AES-192-CBC-enc 5 MiB took 1.307 seconds, 3.826 MiB/s AES-192-CBC-dec 5 MiB took 1.313 seconds, 3.809 MiB/s AES-256-CBC-enc 5 MiB took 1.432 seconds, 3.491 MiB/s AES-256-CBC-dec 5 MiB took 1.426 seconds, 3.506 MiB/s AES-128-GCM-enc 5 MiB took 3.761 seconds, 1.329 MiB/s AES-128-GCM-dec 5 MiB took 3.748 seconds, 1.334 MiB/s AES-192-GCM-enc 5 MiB took 3.918 seconds, 1.276 MiB/s AES-192-GCM-dec 5 MiB took 3.922 seconds, 1.275 MiB/s AES-256-GCM-enc 5 MiB took 4.019 seconds, 1.244 MiB/s AES-256-GCM-dec 5 MiB took 4.014 seconds, 1.246 MiB/s GMAC Default 2 MiB took 1.052 seconds, 1.900 MiB/s AES-128-CTR 5 MiB took 1.189 seconds, 4.205 MiB/s AES-192-CTR 5 MiB took 1.315 seconds, 3.804 MiB/s AES-256-CTR 5 MiB took 1.455 seconds, 3.436 MiB/s AES-CCM-enc 5 MiB took 2.257 seconds, 2.215 MiB/s AES-CCM-dec 5 MiB took 2.269 seconds, 2.204 MiB/s ARC4 15 MiB took 1.062 seconds, 14.124 MiB/s CHACHA 15 MiB took 1.008 seconds, 14.880 MiB/s CHA-POLY 15 MiB took 1.461 seconds, 10.266 MiB/s 3DES 5 MiB took 4.347 seconds, 1.150 MiB/s MD5 25 MiB took 1.029 seconds, 24.291 MiB/s POLY1305 35 MiB took 1.024 seconds, 34.181 MiB/s SHA 25 MiB took 1.115 seconds, 22.418 MiB/s SHA-256 10 MiB took 1.154 seconds, 8.664 MiB/s SHA-384 5 MiB took 1.345 seconds, 3.718 MiB/s SHA-512 5 MiB took 1.343 seconds, 3.723 MiB/s SHA-512/224 5 MiB took 1.350 seconds, 3.703 MiB/s SHA-512/256 5 MiB took 1.345 seconds, 3.718 MiB/s AES-128-CMAC 5 MiB took 1.143 seconds, 4.376 MiB/s AES-256-CMAC 5 MiB took 1.405 seconds, 3.559 MiB/s HMAC-MD5 25 MiB took 1.027 seconds, 24.334 MiB/s HMAC-SHA 25 MiB took 1.112 seconds, 22.490 MiB/s HMAC-SHA256 10 MiB took 1.096 seconds, 9.125 MiB/s HMAC-SHA384 5 MiB took 1.344 seconds, 3.721 MiB/s HMAC-SHA512 5 MiB took 1.347 seconds, 3.712 MiB/s PBKDF2 1 KiB took 1.012 seconds, 1.142 KiB/s RSA 2048 key gen 1 ops took 27.136 sec, avg 27136.046 ms, 0.037 ops/sec RSA 3072 key gen 1 ops took 39.922 sec, avg 39922.464 ms, 0.025 ops/sec RSA 4096 key gen 1 ops took 519.483 sec, avg 519482.959 ms, 0.002 ops/sec RSA 2048 public 200 ops took 1.398 sec, avg 6.989 ms, 143.073 ops/sec RSA 2048 private 100 ops took 40.412 sec, avg 404.121 ms, 2.475 ops/sec DH 2048 key gen 14 ops took 1.033 sec, avg 73.764 ms, 13.557 ops/sec DH 2048 agree 100 ops took 16.401 sec, avg 164.009 ms, 6.097 ops/sec ECC [ SECP256R1] 256 key gen 100 ops took 5.583 sec, avg 55.830 ms, 17.912 ops/sec ECDHE [ SECP256R1] 256 agree 100 ops took 5.555 sec, avg 55.549 ms, 18.002 ops/sec ECDSA [ SECP256R1] 256 sign 100 ops took 5.703 sec, avg 57.032 ms, 17.534 ops/sec ECDSA [ SECP256R1] 256 verify 100 ops took 4.203 sec, avg 42.030 ms, 23.792 ops/sec CURVE 25519 key gen 315 ops took 1.001 sec, avg 3.176 ms, 314.822 ops/sec CURVE 25519 agree 400 ops took 1.244 sec, avg 3.110 ms, 321.579 ops/sec Benchmark complete Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de> Link: https://github.com/openwrt/openwrt/pull/19117 Signed-off-by: Robert Marko <robimarko@gmail.com>		2025-07-30 10:34:25 +02:00
.devcontainer/ci-env	devcontainer: Add development environment for gihub codespace	2023-10-30 23:34:26 +01:00
.github	ci: add missing permission to add comments	2025-06-24 16:29:05 +02:00
.vscode	meta: VS Code: add "Git: Always Sign Off" setting	2024-10-03 17:18:51 +02:00
config	image: also show GRUB options for EROFS	2025-07-26 18:02:31 +02:00
include	prereq: prefer existing built coreutils as symlink target	2025-07-26 14:38:08 +02:00
LICENSES	LICENSES: include all used licenses in LICENSES directory	2021-02-14 19:21:38 +01:00
package	uboot-mediatek: fix FORESEE Flash build warning	2025-07-28 15:07:35 +01:00
scripts	download: add support for gitweb snapshots	2025-07-26 14:38:08 +02:00
target	realtek: convert RTL838x toolchain to 24kc	2025-07-30 10:34:25 +02:00
toolchain	toolchain: glibc: Update glibc 2.41 to recent HEAD	2025-07-29 22:41:17 +02:00
tools	tools/util-linux: fix libuuid linking	2025-07-29 22:00:44 +02:00
.gitattributes	.gitattributes: ignore some whitespace "violations" in .patch files	2024-12-12 11:01:56 +01:00
.gitignore	gitignore: ignore local APK keys	2024-05-17 22:03:06 +03:00
BSDmakefile	build: use SPDX license tags	2021-02-05 14:54:47 +01:00
Config.in	build: scripts/config - update to kconfig-v5.14	2022-02-19 13:10:01 +01:00
COPYING	COPYING: add COPYING file to specify project licenses	2021-02-14 19:21:38 +01:00
feeds.conf.default	feeds.conf.default: enable video feed by default	2024-12-05 01:34:01 +00:00
Makefile	build: include tests/Makefile if available	2024-06-17 17:51:31 +02:00
README.md	README: replace "MacOSX" with "macOS"	2024-04-01 18:46:30 +02:00
rules.mk	rules.mk: respect the empty CONFIG_HOST_FLAGS_OPT	2025-05-16 20:42:43 +02:00

README.md

OpenWrt Project is a Linux operating system targeting embedded devices. Instead of trying to create a single, static firmware, OpenWrt provides a fully writable filesystem with package management. This frees you from the application selection and configuration provided by the vendor and allows you to customize the device through the use of packages to suit any application. For developers, OpenWrt is the framework to build an application without having to build a complete firmware around it; for users this means the ability for full customization, to use the device in ways never envisioned.

Sunshine!

Download

Built firmware images are available for many architectures and come with a package selection to be used as WiFi home router. To quickly find a factory image usable to migrate from a vendor stock firmware to OpenWrt, try the Firmware Selector.

OpenWrt Firmware Selector

If your device is supported, please follow the Info link to see install instructions or consult the support resources listed below.

An advanced user may require additional or specific package. (Toolchain, SDK, ...) For everything else than simple firmware download, try the wiki download page:

OpenWrt Wiki Download

Development

To build your own firmware you need a GNU/Linux, BSD or macOS system (case sensitive filesystem required). Cygwin is unsupported because of the lack of a case sensitive file system.

Requirements

You need the following tools to compile OpenWrt, the package names vary between distributions. A complete list with distribution specific packages is found in the Build System Setup documentation.

binutils bzip2 diff find flex gawk gcc-6+ getopt grep install libc-dev libz-dev
make4.1+ perl python3.7+ rsync subversion unzip which

Quickstart

Run ./scripts/feeds update -a to obtain all the latest package definitions defined in feeds.conf / feeds.conf.default
Run ./scripts/feeds install -a to install symlinks for all obtained packages into package/feeds/
Run make menuconfig to select your preferred configuration for the toolchain, target system & firmware packages.
Run make to build your firmware. This will download all sources, build the cross-compile toolchain and then cross-compile the GNU/Linux kernel & all chosen applications for your target system.

The main repository uses multiple sub-repositories to manage packages of different categories. All packages are installed via the OpenWrt package manager called opkg. If you're looking to develop the web interface or port packages to OpenWrt, please find the fitting repository below.

LuCI Web Interface: Modern and modular interface to control the device via a web browser.
OpenWrt Packages: Community repository of ported packages.
OpenWrt Routing: Packages specifically focused on (mesh) routing.
OpenWrt Video: Packages specifically focused on display servers and clients (Xorg and Wayland).

Support Information

For a list of supported devices see the OpenWrt Hardware Database

Documentation

Support Community

Forum: For usage, projects, discussions and hardware advise.
Support Chat: Channel #openwrt on oftc.net.

Developer Community

Bug Reports: Report bugs in OpenWrt
Dev Mailing List: Send patches
Dev Chat: Channel #openwrt-devel on oftc.net.

License

OpenWrt is licensed under GPL-2.0