Leo-Patch 1.6 · Q1HY MoDT · Observations 14 October 2026
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Overview / Manual / PCI Express Root Port 22
PCIe and Graphics
PCI Express Root Port 22
PCI Express Root Port 22 firmware setup page decoded from AMI HII/IFR resources.
Form ID 0x157d
Records 34
Path Setup / Chipset / PCH-IO Configuration / PCI Express Configuration / PCI Express Root Port 22
Record 3990
PCI Express Root Port 22 Firmware Value
Control the PCI Express Root Port.
Opcode OneOf
Question ID 0xe9a
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x114
Width 1 byte(s)
Range 0 to 1 step 0 Permalink
Record 3991
Connection Type Firmware Value
Built-In: a built-in device is connected to this rootport.
Firmware help text Built-In: a built-in device is connected to this rootport. SlotImplemented bit will be clear. Slot: this rootport connects to user-accessible slot. SlotImplemented bit will be set.
Opcode OneOf
Question ID 0xe9b
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x37c
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} {"condition_id": 1634, "type": "GrayOutIf", "offset": 502282, "expr": ["EqIdVal QuestionId: 0xEA8, Value: 0x1"]} Permalink
Set the ASPM Level: Force L0s - Force all links to L0s State AUTO - BIOS auto configure DISABLE - Disables ASPM
Firmware help text Set the ASPM Level:
Force L0s - Force all links to L0s State
AUTO - BIOS auto configure
DISABLE - Disables ASPM
Opcode OneOf
Question ID 0x15f5
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x130
Width 1 byte(s)
Range 0 to 4 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
PCI Express L1 Substates settings.
Opcode OneOf
Question ID 0x1611
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2d4
Width 1 byte(s)
Range 0 to 2 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
PCI Express L1 Low Substate Enable/Disable.
Opcode OneOf
Question ID 0xe9c
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2f0
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
Enable/Disable Access Control Services Extended Capability
Opcode OneOf
Question ID 0xe9d
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x30c
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
Enable/Disable Precision Time Measurement
Opcode OneOf
Question ID 0x162d
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x328
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
Enable/Disable Downstream Port Containment
Opcode OneOf
Question ID 0xe9e
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x344
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
Enable/Disable Rootport extensions for Downstream Port Containment
Opcode OneOf
Question ID 0xe9f
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x360
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
PCI Express Unsupported Request Reporting Enable/Disable.
Opcode OneOf
Question ID 0xea0
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x14c
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
PCI Express Device Fatal Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xea1
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x168
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
PCI Express Device Non-Fatal Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xea2
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x184
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
PCI Express Device Correctable Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xea3
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x1a0
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
Root PCI Express System Error on Fatal Error Enable/Disable.
Opcode OneOf
Question ID 0xea4
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x1f4
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
Root PCI Express System Error on Non-Fatal Error Enable/Disable.
Opcode OneOf
Question ID 0xea5
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x210
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
Root PCI Express System Error on Correctable Error Enable/Disable.
Opcode OneOf
Question ID 0xea6
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x22c
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
PCI Express PME SCI Enable/Disable.
Opcode OneOf
Question ID 0xea7
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x248
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
PCI Express Hot Plug Enable/Disable.
Opcode OneOf
Question ID 0xea8
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x264
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} {"condition_id": 1635, "type": "GrayOutIf", "offset": 502834, "expr": ["EqIdVal QuestionId: 0xE9B, Value: 0x0"]} Permalink
Record 4008
Advanced Error Reporting Firmware Value
Advanced Error Reporting Enable/Disable.
Opcode OneOf
Question ID 0xea9
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x280
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
Configure PCIe Speed
Opcode OneOf
Question ID 0xeaa
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x29c
Width 1 byte(s)
Range 0 to 3 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
Record 4010
Transmitter Half Swing Firmware Value
Transmitter Half Swing Enable/Disable.
Opcode OneOf
Question ID 0xeab
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x2b8
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
Record 4011
Detect Timeout Firmware Value
The number of milliseconds reference code will wait for link to exit Detect state for enabled ports before assuming there is no device and potentially disabling the port.
Opcode Numeric
Question ID 0xeac
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x3ad
Width 2 byte(s)
Range 0 to 65535 step 1 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
Record 4012
Extra Bus Reserved Firmware Value
Extra Bus Reserved (0-7) for bridges behind this Root Bridge.
Opcode Numeric
Question ID 0xead
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x534
Width 1 byte(s)
Range 0 to 7 step 1 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
Record 4013
Reserved Memory Firmware Value
Reserved Memory for this Root Bridge (1-20) MB
Opcode Numeric
Question ID 0xeae
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x565
Width 2 byte(s)
Range 1 to 20 step 1 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
Reserved I/O (4K/8K/12K/16K/20K) Range for this Root Bridge.
Opcode Numeric
Question ID 0xeaf
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x588
Width 1 byte(s)
Range 4 to 20 step 4 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
PCH PCIE Latency Reporting Enable/Disable
Opcode OneOf
Question ID 0xeb0
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x3f8
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
Record 4016
Snoop Latency Override Firmware Value
Snoop Latency Override for PCH PCIE.
Firmware help text Snoop Latency Override for PCH PCIE.
Disabled: Disable override.
Manual: Manually enter override values.
Auto (default): Maintain default BIOS flow.
Opcode OneOf
Question ID 0xeb1
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x430
Width 1 byte(s)
Range 0 to 2 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} {"condition_id": 1636, "type": "SuppressIf", "offset": 503149, "expr": ["EqIdVal QuestionId: 0xEB0, Value: 0x0"]} Permalink
Record 4017
Snoop Latency Value Firmware Value
LTR Snoop Latency value of PCH PCIE
Opcode Numeric
Question ID 0xeb2
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x4b5
Width 2 byte(s)
Range 0 to 1023 step 1 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} {"condition_id": 1636, "type": "SuppressIf", "offset": 503149, "expr": ["EqIdVal QuestionId: 0xEB0, Value: 0x0"]} {"condition_id": 1637, "type": "SuppressIf", "offset": 503197, "expr": ["EqIdVal QuestionId: 0xEB1, Value: 0x1", "Not"]} Permalink
Record 4018
Snoop Latency Multiplier Firmware Value
LTR Snoop Latency Multiplier of PCH PCIE
Opcode OneOf
Question ID 0xeb3
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x44c
Width 1 byte(s)
Range 0 to 5 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} {"condition_id": 1636, "type": "SuppressIf", "offset": 503149, "expr": ["EqIdVal QuestionId: 0xEB0, Value: 0x0"]} {"condition_id": 1637, "type": "SuppressIf", "offset": 503197, "expr": ["EqIdVal QuestionId: 0xEB1, Value: 0x1", "Not"]} Permalink
Record 4019
Non Snoop Latency Override Firmware Value
Non Snoop Latency Override for PCH PCIE.
Firmware help text Non Snoop Latency Override for PCH PCIE.
Disabled: Disable override.
Manual: Manually enter override values.
Auto (default): Maintain default BIOS flow.
Opcode OneOf
Question ID 0xeb4
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x468
Width 1 byte(s)
Range 0 to 2 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} {"condition_id": 1636, "type": "SuppressIf", "offset": 503149, "expr": ["EqIdVal QuestionId: 0xEB0, Value: 0x0"]} Permalink
Record 4020
Non Snoop Latency Value Firmware Value
LTR Non Snoop Latency value of PCH PCIE
Opcode Numeric
Question ID 0xeb5
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x4ed
Width 2 byte(s)
Range 0 to 1023 step 1 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} {"condition_id": 1636, "type": "SuppressIf", "offset": 503149, "expr": ["EqIdVal QuestionId: 0xEB0, Value: 0x0"]} {"condition_id": 1638, "type": "SuppressIf", "offset": 503341, "expr": ["EqIdVal QuestionId: 0xEB4, Value: 0x1", "Not"]} Permalink
Record 4021
Non Snoop Latency Multiplier Firmware Value
LTR Non Snoop Latency Multiplier of PCH PCIE
Opcode OneOf
Question ID 0xeb6
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x484
Width 1 byte(s)
Range 0 to 5 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} {"condition_id": 1636, "type": "SuppressIf", "offset": 503149, "expr": ["EqIdVal QuestionId: 0xEB0, Value: 0x0"]} {"condition_id": 1638, "type": "SuppressIf", "offset": 503341, "expr": ["EqIdVal QuestionId: 0xEB4, Value: 0x1", "Not"]} Permalink
PCIE LTR Configuration Lock
Opcode OneOf
Question ID 0xeb7
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0x414
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink
Record 4023
Peer Memory Write Enable Firmware Value
Peer Memory Write Enable/Disable
Opcode OneOf
Question ID 0xeb8
VarStore PchSetup
VarStore GUID 4570B7F1-ADE8-4943-8DC3-406472842384
Offset 0xd3
Width 1 byte(s)
Range 0 to 1 step 0 Visibility / conditions {"condition_id": 1633, "type": "SuppressIf", "offset": 502274, "expr": ["EqIdVal QuestionId: 0xE9A, Value: 0x0"]} Permalink