On 08/17/2015 10:43 AM, Alexey Brodkin wrote: > Hello, > > I'm playing with OpenWRT for a new platform and have a question on > how OpenWRT handles KCONFIG kernel options. > > For example I select "KernelPackage/crypto-core" in OpenWRT's menuconfig > then KCONFIG is populated with: > ------------------>8-------------------- > CONFIG_CRYPTO=y > CONFIG_CRYPTO_HW=y > CONFIG_CRYPTO_BLKCIPHER > CONFIG_CRYPTO_ALGAPI > ------------------>8-------------------- > > From what I may see from grepping through OpenWRT that KCONFIG value > is only used to determine if those options are enabled in kernel configuration > but not for force selection of options in kernel.
They are mainly used for selecting the config options in the kernel. I do not know how exactly it is done. > In other words if I want to get crypto core built I need to make sure first > that in my say "target/linux/board/config-4.1" options mentioned above are > enabled. Is that observation correct? no > I'm asking because my initial assumption was I need to provide a minimal > kernel configuration in "target/linux/board/config-4.1" and then on > selection of kmods in OpenWRT's menuconfig missing config options > will be automatically added in kernel config. Your initial assumption was correct. You should provide a minimal "target/linux/board/config-4.1" which selects all kernel options which will be compiled into the main kernel image, it should not contain any option selected as a module, everything you want to build as a module should be defined in a OpenWrt kernel package and they it can be selected optional. > But apparently no options are auto-enabled because I'm seeing that kind > of build failure if CONFIG_CRYPTO_BLKCIPHER is not explicitly set in my > kernel config: > ------------------>8-------------------- > NOTICE: module 'xxx/openwrt/build_dir/target-yyy/linux-zzz/linux > -4.1.3/crypto/crypto_algapi.ko' is built-in. > ERROR: module 'xxx/openwrt/build_dir/target-yyy/linux-zzz/linux > -4.1.3/crypto/crypto_blkcipher.ko' is missing. > modules/crypto.mk:30: recipe for target 'xxx/openwrt/bin/axs10x > -uClibc/packages/base/kmod-crypto-core_4.1.3-1_axs10x.ipk' failed > make[3]: *** [xxx/openwrt/bin/axs10x > -uClibc/packages/base/kmod-crypto-core_4.1.3-1_axs10x.ipk] Error 1 > ------------------>8-------------------- The kmod-crypto-core from KernelPackage/crypto-core should select the CONFIG_CRYPTO_BLKCIPHER option. Hauke _______________________________________________ openwrt-devel mailing list [email protected] https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel
