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Commit1f7efaf89f("package/qemu: do not support x86_steamroller or x86_core_avx2") excluded BR2_x86_steamroller from BR2_PACKAGE_HOST_QEMU_ARCH_SUPPORTS. This is still needed, but for a different reason than AVX, and the exclusion is incomplete. steamroller is bdver3, and what the Qemu TCG engine cannot emulate there is not AVX, but the Bulldozer-specific XOP, FMA4, TBM and LWP extensions. In Qemu 11.0.0 (the version we currently package) and 11.1.1, target/i386/cpu.c has: #define TCG_EXT3_FEATURES (CPUID_EXT3_LAHF_LM | CPUID_EXT3_SVM | \ CPUID_EXT3_CR8LEG | CPUID_EXT3_ABM | CPUID_EXT3_SSE4A | \ CPUID_EXT3_3DNOWPREFETCH | CPUID_EXT3_KERNEL_FEATURES | \ CPUID_EXT3_CMP_LEG) CPUID_EXT3_XOP, CPUID_EXT3_FMA4, CPUID_EXT3_TBM and CPUID_EXT3_LWP are defined in target/i386/cpu.h, but are not part of that mask, i.e. TCG does not implement them. Binaries using those instructions therefore die with: qemu: uncaught target signal 4 (Illegal instruction) - core dumped This affects the whole Bulldozer family, not only steamroller: bulldozer (bdver1), piledriver (bdver2) and excavator (bdver4) are equally unsupported, but were never excluded. Use the newly introduced BR2_X86_CPU_HAS_XOP symbol, which covers all four variants, instead of listing BR2_x86_steamroller alone. As for AVX512, this disables gobject-introspection and nodejs, which are the two packages needing host-qemu in user mode. Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com> Assisted-by: Claude:claude-opus-5 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> (cherry picked from commit22c0ec4fcf) Signed-off-by: Raphaël Mélotte <raphael.melotte@mind.be>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at https://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches