XFEATURE_MASK_FPSTATE
restore_fpregs_from_fpstate(fpu->fpstate, XFEATURE_MASK_FPSTATE);
restore_fpregs_from_fpstate(&init_fpstate, XFEATURE_MASK_FPSTATE);
restore_fpregs_from_fpstate(cur_fps, XFEATURE_MASK_FPSTATE);
u64 mask = fpu_kernel_cfg.max_features & XFEATURE_MASK_FPSTATE;