This patch extends CLINT emulation to provide rdtime callback for TCG. This rdtime callback will be called wheneven TIME CSRs are read in privileged modes. Signed-off-by: Anup Patel <anup.patel@wdc.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>