Hi, I'm trying to get kexec working on a cross-compiled arm64/aarch64 system, using Linux kernel 4.4.23. I'm using kexec-tool's master branch (commit e345e27417db00a9e754ca0ca14b2ec87d0552f7 from https://git.kernel.org/cgit/linux/kernel/git/geoff/kexec-tools.git). I initially tried using the patches for linux-kexec's kexec-13 branch with manual massaging in some spots because kexec-13 is for 4.4.0 not 4.4.23. Both tools and kernel appear to build fine, however when it comes time to kexec, I encounter this message: "kexec_load failed: Function not implemented" Searching through the patches, I don't find any reference to kexec_load itself. Should I be applying a different version of kexec-tools, or linux-kexec patches, to my build? (I'm restricted to 4.4.23 as the base kernel) Is there a way post compile to check if the kexec_load function is implemented, aside from actually deploying the image and calling kexec? I've run strings against the Image but it doesn't give an exact match for kexec_load (see below). Anything else I should be looking at? # kexec -l /mnt/target/boot/vmlinux --initrd=/tmp/root.sfs Modified cmdline:root=/dev/mmcblk0p2 Unable to find /proc/device-tree/chosen/[linux,]stdout-path, printing from purgatory is disabled kexec_load failed: Function not implemented entry = 0x8095f000 flags = 0xb70000 nr_segments = 4 segment[0].buf = 0x7fa0f64010 segment[0].bufsz = 0x7fbc00 segment[0].mem = 0x80080000 segment[0].memsz = 0x8d0000 segment[1].buf = 0x20cc0830 segment[1].bufsz = 0xe515 segment[1].mem = 0x80950000 segment[1].memsz = 0xf000 segment[2].buf = 0x20ccf840 segment[2].bufsz = 0x6080 segment[2].mem = 0x8095f000 segment[2].memsz = 0x7000 segment[3].buf = 0x7f9e843010 segment[3].bufsz = 0x2720000 segment[3].mem = 0xc0000000 segment[3].memsz = 0x2720000 (I've also tried kexec -l with boot/Image instead of boot/vmlinux) $ grep -i kexec .config CONFIG_KERNEL_KEXEC=y CONFIG_PACKAGE_kexec-tools=y CONFIG_KEXEC_TOOLS_TARGET_NAME="aarch64" # CONFIG_KEXEC_TOOLS_kdump is not set CONFIG_KEXEC_ZLIB=y # CONFIG_KEXEC_LZMA is not set $ strings <build_dir>/arch/arm64/boot/Image | grep kexec_load Wcompat_sys_kexec_load Wsys_kexec_load Thanks! Simon
