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Integrating the following commit(s) to linux-yocto-rt/5.8: commit baee1af811ec9bd3e64990543b7cc85e77c8f50c (HEAD -> master) Author: Bruce Ashfield <bruce.ashfield@gmail.com> Date: Sun Aug 23 22:50:30 2020 -0400 linux-yocto/rt: enable kprobes by default Traditionally kprobes and -rt haven't mixed well, but recent -rt kernels support kprobes without issues. lttng now requires kprobes to be enabled, or the following error is thrown: | build/tmp/work/qemux86_64-poky-linux/lttng-modules/2.12.2-r0/lttng-modules-2.12.2/wrapper/kallsyms.c:20:3: error: #error "LTTng-modules requires CONFIG_KPROBES on kernels >= 5.7.0" | 20 | # error "LTTng-modules requires CONFIG_KPROBES on kernels >= 5.7.0" | | ^~~~~ | make[3]: *** [build/tmp/work-shared/qemux86-64/kernel-source/scripts/Makefile.build:280: build/tmp/work/qemux86_64-poky-linux/lttng-modules/2.12.2-r0/lttng-modules-2.12.2/wrapper/kallsyms.o] Error 1 By including the kprobes fragment into the -rt kernel by default, we fix the issue. (From OE-Core rev: 0ebbcbefc8c1a6731b81b7f1aba695a3665a256e) Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
QEMU Emulation Targets ====================== To simplify development, the build system supports building images to work with the QEMU emulator in system emulation mode. Several architectures are currently supported in 32 and 64 bit variants: * ARM (qemuarm + qemuarm64) * x86 (qemux86 + qemux86-64) * PowerPC (qemuppc only) * MIPS (qemumips + qemumips64) Use of the QEMU images is covered in the Yocto Project Reference Manual. The appropriate MACHINE variable value corresponding to the target is given in brackets.