Intel® Core™ Ultra Processors for H-series and U-series Platforms CFG and MEM Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 795258 | 12/14/2023 | Public |
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Device Enable (DEVEN_0_4_0_PCI) – Offset 54
Allows for enabling/disabling of PCI devices and functions that are within the CPU package. The table below the bit definitions describes the behavior of all combinations of transactions to devices controlled by this register. All the bits in this register are Intel TXT Lockable.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 31:18 | 0h | RO | Reserved |
| 17 | 1h | RW/L | (D10EN) Device10 enable |
| 16 | 0h | RO | Reserved |
| 15 | 1h | RW/L | (D8EN) 0: Bus 0 Device 8 is disabled and not visible. |
| 14 | 1h | RW/L | (D14F0EN) VMD Enable: |
| 13 | 0h | RO | Reserved |
| 12 | 1h | RW/L | (D9EN) 0: Bus 0 Device 9 is disabled and not visible. |
| 11 | 0h | RO | Reserved |
| 10 | 1h | RW/L | (D5EN) 0: Bus 0 Device 5 is disabled and not visible. |
| 9:8 | 0h | RO | Reserved |
| 7 | 1h | RW/L | (D4EN) 0: Bus 0 Device 4 is disabled and not visible. |
| 6:5 | 0h | RO | Reserved |
| 4 | 1h | RW/L | (D2EN) 0: Bus 0 Device 2 is disabled and hidden |
| 3:1 | 0h | RO | Reserved |
| 0 | 1h | RO | (D0EN) Bus 0 Device 0 Function 0 may not be disabled and is therefore hardwired to 1. |