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SR-IOV Virtual function not working ( no /sys/class/net/IFNAME/device/sriov_numvfs ) , but direct pci passthrough works fine



I Have some servers with both X710 and 82599ES

I can use 82599ES perfectly, ( both pci and virtual )


But on X710 card, I can only use full pci passthrough


There is no /sys/class/net/IFNAME/device/sriov_numvfs


Here is my lspci


43:00.1 Ethernet controller: Intel Corporation Ethernet Controller X710 for 10GbE SFP+ (rev 01)

Subsystem: Intel Corporation Ethernet Converged Network Adapter X710

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: 64 bytes

Interrupt: pin A routed to IRQ 45

Region 0: Memory at f7000000 (64-bit, prefetchable) [size=16M]

Region 3: Memory at f5ff8000 (64-bit, prefetchable) [size=32K]

Expansion ROM at fb180000 [disabled] [size=512K]

Capabilities: [40] 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=1 PME-

Capabilities: [50] MSI: Enable- Count=1/1 Maskable+ 64bit+

Address: 0000000000000000 Data: 0000

Masking: 00000000 Pending: 00000000

Capabilities: [70] MSI-X: Enable+ Count=129 Masked-

Vector table: BAR=3 offset=00000000

PBA: BAR=3 offset=00001000

Capabilities: [a0] Express (v2) Endpoint, MSI 00

DevCap: MaxPayload 2048 bytes, PhantFunc 0, Latency L0s <512ns, L1 <64us

ExtTag+ AttnBtn- AttnInd- PwrInd- RBE+ FLReset+ SlotPowerLimit 0.000W

DevCtl: Report errors: Correctable- Non-Fatal+ Fatal+ Unsupported+

RlxdOrd+ ExtTag+ PhantFunc- AuxPwr- NoSnoop- FLReset-

MaxPayload 256 bytes, MaxReadReq 512 bytes

DevSta: CorrErr+ UncorrErr- FatalErr- UnsuppReq+ AuxPwr- TransPend-

LnkCap: Port #0, Speed 8GT/s, Width x8, ASPM L1, Exit Latency L0s <2us, L1 <16us

ClockPM- Surprise- LLActRep- BwNot- ASPMOptComp+

LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+

ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-

LnkSta: Speed 5GT/s, Width x8, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-

DevCap2: Completion Timeout: Range ABCD, TimeoutDis+, LTR-, OBFF Not Supported

DevCtl2: Completion Timeout: 65ms to 210ms, TimeoutDis-, LTR-, OBFF Disabled

LnkSta2: Current De-emphasis Level: -3.5dB, EqualizationComplete-, EqualizationPhase1-

EqualizationPhase2-, EqualizationPhase3-, LinkEqualizationRequest-

Capabilities: [e0] Vital Product Data

Product Name: X710 10GbE Controller

Read-only fields:

[V0] Vendor specific: FFV18.0.17

[PN] Part number: 5N7Y5

[MN] Manufacture ID: 31 30 32 38

[V1] Vendor specific: DSV1028VPDR.VER2.0

[V3] Vendor specific: DTINIC


[V5] Vendor specific: NPY2

[V6] Vendor specific: PMT7

[V7] Vendor specific: NMVIntel Corp

[V8] Vendor specific: L1D0

[RV] Reserved: checksum good, 1 byte(s) reserved

Read/write fields:

[Y1] System specific: CCF1


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- NonFatalErr-

CEMsk: RxErr+ BadTLP+ BadDLLP+ Rollover+ Timeout+ NonFatalErr+

AERCap: First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn-

Capabilities: [140 v1] Device Serial Number 40-5b-2d-ff-ff-fe-fd-3c

Capabilities: [150 v1] Alternative Routing-ID Interpretation (ARI)

ARICap: MFVC- ACS-, Next Function: 0

ARICtl: MFVC- ACS-, Function Group: 0

Capabilities: [1a0 v1] Transaction Processing Hints

Device specific mode supported

No steering table available

Capabilities: [1b0 v1] Access Control Services

ACSCap: SrcValid- TransBlk- ReqRedir- CmpltRedir- UpstreamFwd- EgressCtrl- DirectTrans-

ACSCtl: SrcValid- TransBlk- ReqRedir- CmpltRedir- UpstreamFwd- EgressCtrl- DirectTrans-

Kernel driver in use: i40e

Kernel modules: i40e


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5 Replies
Hello FYama, Thank you for posting in Intel Ethernet Communities. Please provide the markings from the product label so we can identify the adapter. Please provide "ethtool -i <interface>" and "ethtool -k <interface>". Please also provide "ethtool -i <interface>" from the VM. Let us know if you have any other questions. Best regards, Daniel D Intel Customer Support Under Contract to Intel Corporation



Here it is:


# ethtool -i enp67s0f1

driver: i40e

version: 2.1.14-k

firmware-version: 5.40 0x80002d35 18.0.17


bus-info: 0000:43:00.1

supports-statistics: yes

supports-test: yes

supports-eeprom-access: yes

supports-register-dump: yes

supports-priv-flags: yes


# ethtool -k enp67s0f1

ethtool -k enp67s0f1

Features for enp67s0f1:

rx-checksumming: on

tx-checksumming: on

tx-checksum-ipv4: on

tx-checksum-ip-generic: off [fixed]

tx-checksum-ipv6: on

tx-checksum-fcoe-crc: off [fixed]

tx-checksum-sctp: on

scatter-gather: on

tx-scatter-gather: on

tx-scatter-gather-fraglist: off [fixed]

tcp-segmentation-offload: on

tx-tcp-segmentation: on

tx-tcp-ecn-segmentation: on

tx-tcp-mangleid-segmentation: off

tx-tcp6-segmentation: on

udp-fragmentation-offload: off

generic-segmentation-offload: on

generic-receive-offload: on

large-receive-offload: off [fixed]

rx-vlan-offload: on

tx-vlan-offload: on

ntuple-filters: off

receive-hashing: on

highdma: on

rx-vlan-filter: on [fixed]

vlan-challenged: off [fixed]

tx-lockless: off [fixed]

netns-local: off [fixed]

tx-gso-robust: off [fixed]

tx-fcoe-segmentation: off [fixed]

tx-gre-segmentation: on

tx-gre-csum-segmentation: on

tx-ipxip4-segmentation: off [fixed]

tx-ipxip6-segmentation: off [fixed]

tx-udp_tnl-segmentation: on

tx-udp_tnl-csum-segmentation: on

tx-gso-partial: on

tx-sctp-segmentation: off [fixed]

tx-esp-segmentation: off [fixed]

fcoe-mtu: off [fixed]

tx-nocache-copy: off

loopback: off [fixed]

rx-fcs: off [fixed]

rx-all: off [fixed]

tx-vlan-stag-hw-insert: off [fixed]

rx-vlan-stag-hw-parse: off [fixed]

rx-vlan-stag-filter: off [fixed]

l2-fwd-offload: off [fixed]

hw-tc-offload: off

esp-hw-offload: off [fixed]

esp-tx-csum-hw-offload: off [fixed]

rx-udp_tunnel-port-offload: on




Hello FYama, Thank you for the reply. Have you only tried the in-kernel version of the driver, or have you tried the latest i40e? Are you using KVM, and are you using a virtual API, or hardware emulator? What does the VF do when SR-IOV is enabled? Is there a VF driver on the VM? Please check with the OEM if there is a firmware update, as this appears to be a non-retail Intel version of the adapter. Let us know if you have any questions. Best regards, Daniel D Intel Customer Support Under Contract to Intel Corporation
Hello FYama, Please let us know if a firmware update from the OEM helped you solve this issue. If you have any other questions please let us know. Best regards, Daniel D Intel Customer Support Under Contract to Intel Corporation
Hi FYama, Please let us know if there's other assistance needed. Best Regards, Vince T. Intel Customer Support Under Contract to Intel Corporation