Intel® Core™ Ultra 200V Series Processors SOC I/O Registers
| ID | Date | Version | Classification |
|---|---|---|---|
| 831520 | 09/03/2024 | 001 | Public |
Interrupt Remapping Table Address Register (IRTA_REG_0_0_0_VTDBAR) – Offset 200b8
Register providing the base address of Interrupt remapping table. This register is treated as Rsvd by implementations reporting Interrupt Remapping (IR) as not supported in the Extended Capability register.
| Bit Range | Default | Access | Field Name and Description |
|---|---|---|---|
| 63:42 | 0h | RO | Reserved |
| 41:12 | 0h | RW/L | Interrupt Remapping Table Address (IRTA) This field points to the base of 4KB aligned interrupt remapping table Hardware ignores and does not implement bits 63:HAW, where HAW is the host address width Reads of this field returns value that was last programmed to it. |
| 11 | 0h | RW/L | Extended Interrupt Mode Enable (EIME) This field is used by hardware on Intel64 platforms as follows:
Hardware interprets all 32-bits of Destination-ID field in the IRTEs. This field is implemented as RsvdZ on implementations reporting Extended Interrupt Mode (EIM) field as Clear in Extended Capability register. Software must not modify this field while Interrupt remapping is active (IRES=1 in Global Status register) The value of this field takes effect only after software executes Set Interrupt Remap Table Pointer command. |
| 10:4 | 0h | RO | Reserved |
| 3:0 | 0h | RW/L | Size (S) This field specifies the size of the interrupt remapping table. The number of entries in the interrupt remapping table is 2(X+1), where X is the value programmed in this field. |