Processor Configuration Registers
2.21.27 IRTA_REG—Interrupt Remapping Table Address Register
This register provides the base address of Interrupt remapping table. This register is
treated as RsvdZ by implementations reporting Interrupt Remapping (IR) as not
supported in the Extended Capability register.
B/D/F/Type:
Address Offset:
Reset Value:
Access:
0/0/0/VC0PREMAP
B8–BFh
0000000000000000h
RW-L
64 bits
00000000h
Size:
BIOS Optimal Default
Reset
Value
RST/
PWR
Bit
Access
Description
63:39
RO
0h
Reserved (RSVD)
Interrupt Remapping Table Address (IRTA)
This field points to the base of 4 KB aligned interrupt remapping
table.
Hardware ignores and does not implement bits 63:HAW, where
HAW is the host address width.
38:12
RW-L
0000000h
Uncore
Uncore
Reads of this field returns value that was last programmed to it.
11:4
3:0
RO
0h
0h
Reserved (RSVD)
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.
RW-L
Datasheet, Volume 2
339
INTEL [ INTEL ]
