Commit f46f05b6d8 for qemu.org

commit f46f05b6d88faff6f46ee38ca956b0c16f8935fb
Author: Philippe Mathieu-Daudé <philmd@linaro.org>
Date:   Wed Jun 25 23:54:17 2025 +0200

    target/arm: Only allow disabling NEON when using TCG

    Only allow disabling NEON when using TCG.

    This avoids confusing user experience:

      $ qemu-system-aarch64 -M virt -accel hvf \
                            -cpu host,neon=off,vfp=off,vfp-d32=off
      qemu-system-aarch64: AArch64 CPUs must have both VFP and Neon or neither

      $ qemu-system-aarch64 -M virt -accel hvf \
                            -cpu host,neon=off,vfp=off,vfp-d32=off
      qemu-system-aarch64: ARM CPUs must have both VFP-D32 and Neon or neither

      $ qemu-system-aarch64 -M virt -accel hvf \
                            -cpu host,neon=off,vfp=off,vfp-d32=off
      qemu-system-aarch64: can't apply global host-arm-cpu.vfp-d32=off: Property 'host-arm-cpu.vfp-d32' not found

    Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
    Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
    Reviewed-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
    Message-ID: <20260112103034.65310-20-philmd@linaro.org>

diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index c1087bf5b9..05fa3339b1 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -1460,7 +1460,7 @@ static void arm_cpu_post_init(Object *obj)

     if (arm_feature(&cpu->env, ARM_FEATURE_NEON)) {
         cpu->has_neon = true;
-        if (!kvm_enabled()) {
+        if (tcg_enabled() || qtest_enabled()) {
             qdev_property_add_static(DEVICE(obj), &arm_cpu_has_neon_property);
         }
     }