Cortex-A32 is an AArch32-only ARMv8-A core - it has no AArch64 mode at all. The current tune-cortexa32.inc lacks the thumb feature, and its AArch32 crypto FPU selection and PACKAGE_EXTRA_ARCHS names are wrong for a Thumb-2 build.
Adds a qemuarmv8a32 machine so the above is actually exercisable: QEMU has no Cortex-A32 model, so it runs on the 'virt' machine with qemu-system-aarch64 using the Cortex-A32's AArch64-capable sibling, the Cortex-A35, with 'aarch64=off' so the guest is AArch32-only. This provides the ARMv8-A AArch32 feature set including the crypto extensions needed by the crypto tune, and the same binary supports KVM on AArch64 hosts whose CPUs implement AArch32 at EL1 via '-cpu host,aarch64=off'. The kernel is built as a zImage and u-boot uses qemu_arm_defconfig, matching the other 32-bit ARM QEMU machines. AI-Generated: Claude Code (Claude Opus 4.8) Signed-off-by: Alex Kiernan <[email protected]> Signed-off-by: Alex Kiernan <[email protected]> --- Changes in v2: - Drop merged AArch32 ARMv8-A patches - Cherry-pick upstream QEMU support to Allow aarch64=off for TCG - Rework qemuarmv8a32 so it runs on qemu-system-aarch64 with aarch64=off - Link to v1: https://patch.msgid.link/[email protected] --- Alex Kiernan (2): qemu: Backport support for 'aarch64=off' with TCG qemuarmv8a32: add QEMU machine for AArch32 ARMv8-A meta/conf/machine/qemuarmv8a32.conf | 38 ++++++ meta/recipes-devtools/qemu/qemu.inc | 2 + ...lear-AArch64-ID-regs-from-ARMISARegisters.patch | 110 +++++++++++++++++ ...-Allow-aarch64-off-to-be-set-for-TCG-CPUs.patch | 134 +++++++++++++++++++++ meta/recipes-kernel/linux/linux-yocto_6.18.bb | 2 +- 5 files changed, 285 insertions(+), 1 deletion(-) --- base-commit: ddb2dd22942f2fcacb6b88d5b37d2a26ca832982 change-id: 20260701-tune-a32-78f0212484c9 Best regards, -- Alex Kiernan <[email protected]>
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