Datasheet

Datasheet, Volume 2 233
Processor Configuration Registers
60:59 RO 00b
Context Actual Invalidation Granularity (CAIG)
Hardware reports the granularity at which an invalidation request was
processed through the CAIG field at the time of reporting invalidation
completion (by clearing the ICC field).
The following are the encodings for the CAIG field:
00 = Reserved.
01 = Global Invalidation performed. This could be in response to a global,
domain-selective or device-selective invalidation request.
10 = Domain-selective invalidation performed using the domain-id specified
by software in the DID field. This could be in response to a domain-
selective or device-selective invalidation request.
11 = Device-selective invalidation performed using the source-id and
domain-id specified by software in the SID and FM fields. This can only
be in response to a device-selective invalidation request.
58:34 RO 0000000h Reserved
33:32 W 00b
Function Mask (FM)
Software may use the Function Mask to perform device-selective
invalidations on behalf of devices supporting PCI Express Phantom Functions.
This field specifies which bits of the function number portion (least significant
three bits) of the SID field to mask when performing device-selective
invalidations.
The following encodings are defined for this field:
00 = No bits in the SID field masked.
01 = Mask most significant bit of function number in the SID field.
10 = Mask two most significant bit of function number in the SID field.
11 = Mask all three bits of function number in the SID field.
The context-entries corresponding to all the source-ids specified through the
FM and SID fields must have the domain-id specified in the DID field.
Value returned on read of this field is undefined.
31:16 W 0000h
Source ID (SID)
Indicates the source-id of the device whose corresponding context-entry
needs to be selectively invalidated. This field along with the FM field must be
programmed by software for device-selective invalidation requests.
Value returned on read of this field is undefined.
15:0 RW 0000h
Domain-ID (DID)
Indicates the ID of the domain whose context-entries needs to be selectively
invalidated. This field must be programmed by software for both domain-
selective and device-selective invalidation requests.
The Capability register reports the domain-id width supported by hardware.
Software must ensure that the value written to this field is within this limit.
Hardware may ignore and not implement bits 15:N where N is the supported
domain-id width reported in the capability register.
B/D/F/Type: 0/0/0/DMIVC1REMAP
Address Offset: 28–2Fh
Reset Value: 0000000000000000h
Access: RW-SC, RW, RO, W
Bit Attr
Reset
Value
Description