Datasheet

Processor Configuration Registers
264 Datasheet, Volume 2
2.18.5 GSTS_REG—Global Status Register
This register reports general remapping hardware status.
23 RO 0b
Compatibility Format Interrupt (CFI)
This field is valid only for Intel 64 implementations supporting interrupt-
remapping.
Software writes to this field to enable or disable Compatibility Format
interrupts on Intel 64 platforms. The value in this field is effective only when
interrupt-remapping is enabled and Legacy Interrupt Mode is active.
0 = Block Compatibility format interrupts.
1 = Process Compatibility format interrupts as pass-through (bypass
interrupt remapping).
Hardware reports the status of updating this field through the CFIS field in
the Global Status register.
Refer to the VTd specification for details on Compatibility Format interrupt
requests.
The value returned on a read of this field is undefined.
This field is not implemented.
22:0 RO 000000h Reserved
B/D/F/Type: 0/2/0/GFXVTBAR
Address Offset: 18–1Bh
Reset Value: 00000000h
Access: W, RO, RW
Bit Attr
Reset
Value
Description
B/D/F/Type: 0/2/0/GFXVTBAR
Address Offset: 1C–1Fh
Reset Value: 00000000h
Access: RO
Bit Attr
Reset
Value
Description
31 RO 0b
Translation Enable Status (TES)
This field indicates the status of DMA-remapping hardware.
0 = DMA-remapping hardware is not enabled
1 = DMA-remapping hardware is enabled
30 RO 0b
Root Table Pointer Status (RTPS)
This field indicates the status of the root-table pointer in hardware.
This field is cleared by hardware when software sets the SRTP field in the
Global Command register. This field is set by hardware when hardware
completes the set root-table pointer operation using the value provided in the
Root-Entry Table Address register.
29 RO 0b
Fault Log Status (FLS)
This field:
Is cleared by hardware when software Sets the SFL field in the Global
Command register.
Is Set by hardware when hardware completes the set fault-log pointer
operation using the value provided in the Advanced Fault Log register.
28 RO 0b
Advanced Fault Logging Status (AFLS)
This field is valid only for implementations supporting advanced fault logging.
It indicates the advanced fault logging status:
0 = Advanced Fault Logging is not enabled
1 = Advanced Fault Logging is enabled