Hi, ArmV8 architecture allows to have at EL1 execute a kernel-OS as 64 bits and at EL0 apps at 32 bits. I was able to deploy a RootFS compiled as ARMv7 (32 bits) and boot a system to login prompt.
Problem is now with kernel modules. They are compiled in 64 bit mode, but they have to be insmod in a rootFS as 32 bits. I created the recipe below posted to deploy my hello-mod.ko into the /myfiles folder to do a manual test and insmod - it. Yocto gave me a QA issue stating that the ko is built as AARC64 bits and it was expecting a 32 bits. I temporarily changed the execution permissions of the hello-mod.ko and yocto is ok now. I would like to post the question if somebody has tried what I described above. >From the ARM architecture it is allowed, but I am not sure if it won't be a >natural flow for linux to support it. I'd appreciate any pointers. --Hernan ===================== SUMMARY = "Example of how to deploy an binary Linux kernel module" LICENSE = "GPLv2" LIC_FILES_CHKSUM = "file://COPYING;md5=12f884d2ae1ff87c09e5b7ccc2c4ca7e" kmoddir = "/myfiles" RDEPENDS_${PN} = "bash" INHIBIT_PACKAGE_DEBUG_SPLIT = "1" INHIBIT_PACKAGE_STRIP = "1" SRC_URI = "file://${MACHINE}/hello-mod.ko \ file://COPYING \ " #Don't configure or build this recipe do_configure[noexec] = "1" do_compile[noexec] = "1" do_install_append() { mkdir -p ${D}${kmoddir}/ install -d ${D}${kmoddir}/ cp -P ${WORKDIR}/${MACHINE}/hello-mod.ko ${D}${kmoddir}/hello-mod.ko chmod -x ${D}${kmoddir}/hello-mod.ko #find ${D}${kmoddir} -type f -exec chmod 755 {} \; chown -R root:root "${D}" } #deploy files to final sysconfdir where rootfs will be generated FILES_${PN} += "${kmoddir}/hello-mod.ko" S = "${WORKDIR}" --Hernan -- _______________________________________________ linux-yocto mailing list linux-yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/linux-yocto