689 	unsigned long zcr;  in sve_probe_vqs()  local
693 	zcr = ZCR_ELx_LEN_MASK;  in sve_probe_vqs()
694 	zcr = read_sysreg_s(SYS_ZCR_EL1) & ~zcr;  in sve_probe_vqs()
697 		write_sysreg_s(zcr | (vq - 1), SYS_ZCR_EL1); /* self-syncing */  in sve_probe_vqs()
821 	u64 zcr;  in read_zcr_features()  local
831 	zcr = read_sysreg_s(SYS_ZCR_EL1);  in read_zcr_features()
832 	zcr &= ~(u64)ZCR_ELx_LEN_MASK; /* find sticky 1s outside LEN field */  in read_zcr_features()
834 	zcr |= vq_max - 1; /* set LEN field to maximum effective value */  in read_zcr_features()
836 	return zcr;  in read_zcr_features()
841 	u64 zcr;  in sve_setup()  local
856 	zcr = read_sanitised_ftr_reg(SYS_ZCR_EL1);  in sve_setup()
857 	sve_max_vl = sve_vl_from_vq((zcr & ZCR_ELx_LEN_MASK) + 1);  in sve_setup()