Xeon: PCIe ASPM not supported on intel root port

[sharathdm]

i am validating PCIe ASPM feature of our PCIe EP device

i have plugged my EP to Intel Xeon Ice Lake processor

the root port on which my EP is connected is reporting ASPM not supported ( LnkCap: Port #5, Speed 32GT/s, Width x8, ASPM not supported)

does this mean i cannot ASPM on Ice Lake?

vendor_id : GenuineIntel
cpu family : 6
model : 143
model name : Intel(R) Xeon(R) Gold 6426Y
stepping : 8
microcode : 0x2b0005c0

+-[0000:0c]-+-00.0 Intel Corporation Ice Lake Memory Map/VT-d
| +-00.1 Intel Corporation Ice Lake Mesh 2 PCIe
| +-00.2 Intel Corporation Ice Lake RAS
| +-00.4 Intel Corporation Device 0b23
| \-05.0-[0d]----00.0

0c:05.0 PCI bridge: Intel Corporation Device 352c (rev 04) (prog-if 00 [Normal decode])
DeviceName: SLOT 2
Physical Slot: 2
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 1020 bytes
Interrupt: pin A routed to IRQ 140
NUMA node: 0
IOMMU group: 9
Region 0: Memory at 21fffff00000 (64-bit, non-prefetchable) [size=128K]
Bus: primary=0c, secondary=0d, subordinate=0d, sec-latency=0
I/O behind bridge: 0000f000-00000fff [disabled]
Memory behind bridge: fff00000-000fffff [disabled]
Prefetchable memory behind bridge: 000021ffffd00000-000021ffffefffff [size=2M]
Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-
BridgeCtl: Parity+ SERR+ NoISA- VGA- VGA16- MAbort- >Reset- FastB2B-
PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00
DevCap: MaxPayload 512 bytes, PhantFunc 0
ExtTag+ RBE+
DevCtl: CorrErr- NonFatalErr- FatalErr+ UnsupReq-
RlxdOrd- ExtTag+ PhantFunc- AuxPwr- NoSnoop-
MaxPayload 512 bytes, MaxReadReq 4096 bytes
DevSta: CorrErr- NonFatalErr- FatalErr- UnsupReq- AuxPwr- TransPend-
LnkCap: Port #5, Speed 32GT/s, Width x8, ASPM not supported
ClockPM- Surprise+ LLActRep+ BwNot+ ASPMOptComp+
LnkCtl: ASPM Disabled; RCB 64 bytes, Disabled- CommClk+
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s (downgraded), Width x1 (downgraded)
TrErr- Train- SlotClk+ DLActive+ BWMgmt- ABWMgmt-
SltCap: AttnBtn- PwrCtrl- MRL- AttnInd- PwrInd- HotPlug- Surprise-
Slot #2, PowerLimit 75.000W; Interlock- NoCompl-
SltCtl: Enable: AttnBtn- PwrFlt- MRL- PresDet- CmdCplt- HPIrq- LinkChg-
Control: AttnInd Off, PwrInd Off, Power- Interlock-
SltSta: Status: AttnBtn- PowerFlt- MRL- CmdCplt- PresDet+ Interlock-
Changed: MRL- PresDet+ LinkState+
RootCap: CRSVisible+
RootCtl: ErrCorrectable- ErrNon-Fatal+ ErrFatal+ PMEIntEna+ CRSVisible+
RootSta: PME ReqID 0000, PMEStatus- PMEPending-
DevCap2: Completion Timeout: Range ABC, TimeoutDis+ NROPrPrP+ LTR+
10BitTagComp+ 10BitTagReq+ OBFF Not Supported, ExtFmt+ EETLPPrefix+, MaxEETLPPrefixes 1
EmergencyPowerReduction Not Supported, EmergencyPowerReductionInit-
FRS- LN System CLS Not Supported, TPHComp+ ExtTPHComp- ARIFwd+
AtomicOpsCap: Routing+ 32bit+ 64bit+ 128bitCAS+
DevCtl2: Completion Timeout: 65ms to 210ms, TimeoutDis- LTR+ OBFF Disabled, ARIFwd+
AtomicOpsCtl: ReqEn+ EgressBlck-
LnkCap2: Supported Link Speeds: 2.5-32GT/s, Crosslink- Retimer+ 2Retimers+ DRS-
LnkCtl2: Target Link Speed: 32GT/s, EnterCompliance- SpeedDis-
Transmit Margin: Normal Operating Range, EnterModifiedCompliance- ComplianceSOS-
Compliance De-emphasis: -6dB
LnkSta2: Current De-emphasis Level: -6dB, EqualizationComplete- EqualizationPhase1-
EqualizationPhase2- EqualizationPhase3- LinkEqualizationRequest-
Retimer- 2Retimers- CrosslinkRes: unsupported
Capabilities: [a0] Power Management version 3
Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [94] Subsystem: Intel Corporation Device 0000
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable+ 64bit-
Address: fee00038 Data: 0000
Masking: 00000000 Pending: 00000000
Capabilities: [100 v2] Advanced Error Reporting
UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt+ RxOF- MalfTLP- ECRC- UnsupReq+ ACSViol+
UESvrt: DLP+ SDES+ TLP+ FCP+ CmpltTO+ CmpltAbrt+ UnxCmplt- RxOF+ MalfTLP+ ECRC+ UnsupReq- ACSViol-
CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- AdvNonFatalErr-
CEMsk: RxErr+ BadTLP+ BadDLLP+ Rollover+ Timeout+ AdvNonFatalErr+
AERCap: First Error Pointer: 00, ECRCGenCap+ ECRCGenEn- ECRCChkCap+ ECRCChkEn-
MultHdrRecCap- MultHdrRecEn- TLPPfxPres- HdrLogCap+
HeaderLog: 4a080001 0d000004 fc200000 00000000
RootCmd: CERptEn- NFERptEn- FERptEn-
RootSta: CERcvd- MultCERcvd- UERcvd- MultUERcvd-
FirstFatal- NonFatalMsg- FatalMsg- IntMsg 0
ErrorSrc: ERR_COR: 0000 ERR_FATAL/NONFATAL: 0000
Capabilities: [220 v1] Access Control Services
ACSCap: SrcValid+ TransBlk+ ReqRedir+ CmpltRedir+ UpstreamFwd+ EgressCtrl- DirectTrans-
ACSCtl: SrcValid+ TransBlk- ReqRedir+ CmpltRedir+ UpstreamFwd+ EgressCtrl- DirectTrans-
Capabilities: [190 v1] Vendor Specific Information: ID=0003 Rev=0 Len=00a <?>
Capabilities: [1a0 v1] Downstream Port Containment
DpcCap: INT Msg #0, RPExt+ PoisonedTLP+ SwTrigger+ RP PIO Log 4, DL_ActiveErr+
DpcCtl: Trigger:0 Cmpl- INT- ErrCor- PoisonedTLP+ SwTrigger- DL_ActiveErr-
DpcSta: Trigger- Reason:00 INT- RPBusy- TriggerExt:00 RP PIO ErrPtr:1f
Source: 0000
Capabilities: [150 v1] Precision Time Measurement
PTMCap: Requester:- Responder:+ Root:+
PTMClockGranularity: 2ns
PTMControl: Enabled:+ RootSelected:+
PTMEffectiveGranularity: 2ns
Capabilities: [280 v1] Virtual Channel
Caps: LPEVC=0 RefClk=100ns PATEntryBits=1
Arb: Fixed- WRR32- WRR64- WRR128-
Ctrl: ArbSelect=Fixed
Status: InProgress-
VC0: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
Ctrl: Enable+ ID=0 ArbSelect=Fixed TC/VC=ff
Status: NegoPending- InProgress-
VC1: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
Ctrl: Enable- ID=0 ArbSelect=Fixed TC/VC=00
Status: NegoPending- InProgress-
Capabilities: [a30 v1] Secondary PCI Express
LnkCtl3: LnkEquIntrruptEn- PerformEqu-
LaneErrStat: 0
Capabilities: [a90 v1] Data Link Feature <?>
Capabilities: [a9c v1] Physical Layer 16.0 GT/s <?>
Capabilities: [ae0 v1] Extended Capability ID 0x2a
Capabilities: [edc v1] Lane Margining at the Receiver <?>
Capabilities: [b20 v1] Extended Capability ID 0x2b
Kernel driver in use: pcieport

[NormanS_Intel]

Hello sharathdm,

Thank you for posting in the community!

To ensure you receive the most specialized assistance, we have a dedicated forum that addresses these specific concerns. Therefore, I will be moving this discussion to our Server Forum. This will allow our knowledgeable community and experts to provide you with timely and accurate solutions.

Best regards,

Norman S.

Intel Customer Support Engineer

[IntelSupport]

Hello sharathdm,

Greetings!

We see that the Intel® Xeon® Gold 6426Y is a Tray Processor. Tray processors are sold to high volume manufacturers, such as Acer, ASUS , Dell, Hewlett-Packard or Lenovo. They buy processors in bulk, incorporate them into PCs (laptops, desktops, All-in-Ones). Warranty replacements and technical support for tray processors are provided directly by these providers. We refer to these processors as tray or OEM processors. Intel doesn't provide direct warranty support. Contact your OEM or reseller for warranty support.

Please refer to the Intel article given below which supports the statement given above.

https://www.intel.com/content/www/us/en/support/articles/000029613/processors.html

Regards,

Vikas

Intel Customer Support Technician

intel.com/vroc