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Wed, 16 Sep 2026 12:15:47 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/245965 From: Harish Sadineni QEMU RISC-V hangs (qemu hang-up) when using fw_jump.elf as the default BIOS while kernel debugging is enabled. This has been observed with the 6.18 kernel (exact version where it was introduced is not known). As a workaround, switch to fw_dynamic.elf when KERNEL_DEBUG is enabled, which avoids the hang and works correctly with debug builds. The default behaviour is unchanged and continues to use fw_jump.elf when KERNEL_DEBUG is not set. [YOCTO #16409] Signed-off-by: Harish Sadineni --- meta/conf/machine/include/riscv/qemuriscv.inc | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/meta/conf/machine/include/riscv/qemuriscv.inc b/meta/conf/machine/include/riscv/qemuriscv.inc index bac376ce5a..6e7d4a8adf 100644 --- a/meta/conf/machine/include/riscv/qemuriscv.inc +++ b/meta/conf/machine/include/riscv/qemuriscv.inc @@ -29,7 +29,10 @@ QB_SMP ?= "-smp 4" QB_KERNEL_CMDLINE_APPEND = "earlycon=sbi" QB_CPU:riscv64 ?= "-cpu rva23s64,pmp=true" QB_MACHINE = "-machine virt" -QB_DEFAULT_BIOS = "fw_jump.elf" +# Workaround: fw_jump.elf causes QEMU RISC-V to hang when KERNEL_DEBUG +# is enabled, use fw_dynamic.elf in that case instead. +# See https://bugzilla.yoctoproject.org/show_bug.cgi?id=16409 for more details. +QB_DEFAULT_BIOS = "${@bb.utils.contains('KERNEL_DEBUG', 'True', 'fw_dynamic.elf', 'fw_jump.elf', d)}" QB_TAP_OPT = "-netdev tap,id=net0,ifname=@TAP@,script=no,downscript=no" QB_NETWORK_DEVICE = "-device virtio-net-device,netdev=net0,mac=@MAC@" QB_ROOTFS_OPT = "-drive id=disk0,file=@ROOTFS@,if=none,format=raw -device virtio-blk-device,drive=disk0"