[U-Boot] Running ARMv8 on fast model

Hello expert. I'm trying to run ARMv8 u-boot on fast model. Exactly on Coretex-A57×4 In FVP_VE

When I run command "model_shell64 cadi_system_Linux64-Release-GCC-4.6.so u-boot.elf"

There isn't any pop up xterm terminal.

My fast model version is 8.3 and I used vexpress_aemv8a configuration on denx u-boot mainline.

Does any body test armv8 u-boot on fast model?