MLX5_REG_PPLM
err = -mlx5_core_access_reg(mdev, in, sz, in, sz, MLX5_REG_PPLM, 0, 0);
err = -mlx5_core_access_reg(mdev, in, sz, in, sz, MLX5_REG_PPLM, 0, 0);
err = -mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPLM, 0, 1);
err = -mlx5_core_access_reg(mdev, in, sz, in, sz, MLX5_REG_PPLM, 0, 0);
err = -mlx5_core_access_reg(mdev, in, sz, out, sz, MLX5_REG_PPLM, 0, 1);