Intel® Core™ Ultra Series 3 Processors I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 872352 | 04/14/2026 | 001 | Public |
Power Status (HfPWRSTS) – Offset 1d1c
This register reports the power domain status.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 15 | 0h | RO/V | HUB-ULP Power Gating Status (HUBULPPGS) Indicates the current power gating status of domain. |
| 14:13 | 0h | RO | Reserved (Zero) (RSVD14) SW must use zeros for writes. |
| 12 | 0h | RO/V | ML Power Gating Status (MLPGS) Indicates the current power gating status of domain. |
| 11:10 | 0h | RO | Reserved (Zero) (RSVD11) SW must use zeros for writes. |
| 9:8 | 0h | RO/V | LPIO Power Gating Status (IOxPGS) Indicates the current power gating status of domain. |
| 7 | 0h | RO | Reserved |
| 6 | 0h | RO/V | HUB-HP Power Gating Status (HUBHPPGS) Indicates the current power gating status of domain. |
| 5 | 0h | RO/V | HST Power Gating Status (HSTPGS) Indicates the current power gating status of domain. |
| 4:0 | 0h | RO | Reserved (Zero) (RSVD4) SW must use zeros for writes. |