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We'll introduce the KVM accelerator class with a 'cpu_instance_init' implementation that is going to be invoked during the common riscv_cpu_post_init() (via accel_cpu_instance_init()). This instance_init will execute KVM exclusive code that TCG doesn't care about, such as adding KVM specific properties, initing registers using a KVM scratch CPU and so on. The core of the forementioned cpu_instance_init impl is the current riscv_cpu_add_kvm_properties() that is being used by the common code via riscv_cpu_add_user_properties() in cpu.c. Move it to kvm.c, together will all the relevant artifacts, exporting and renaming it to kvm_riscv_cpu_add_kvm_properties() so cpu.c can keep using it for now. To make this work we'll need to export riscv_cpu_extensions, riscv_cpu_vendor_exts and riscv_cpu_experimental_exts from cpu.c as well. The TCG accelerator will also need to access those in the near future so this export will benefit us in the long run. Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Reviewed-by: LIU Zhiwei <zhiwei_liu@linux.alibaba.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-ID: <20230925175709.35696-9-dbarboza@ventanamicro.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>