On Wed, Mar 18, 2015 at 11:24 AM, Bandan Das <bsd@xxxxxxxxxx> wrote: > [Ccing netdev and Stefan] > Bandan Das <bsd@xxxxxxxxxx> writes: > >> jacob jacob <opstkusr@xxxxxxxxx> writes: >> >>> On Mon, Mar 16, 2015 at 2:12 PM, Bandan Das <bsd@xxxxxxxxxx> wrote: >>>> jacob jacob <opstkusr@xxxxxxxxx> writes: >>>> >>>>> I also see the following in dmesg in the VM. >>>>> >>>>> [ 0.095758] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff]) >>>>> [ 0.096006] acpi PNP0A03:00: ACPI _OSC support notification failed, >>>>> disabling PCIe ASPM >>>>> [ 0.096915] acpi PNP0A03:00: Unable to request _OSC control (_OSC >>>>> support mask: 0x08) >>>> IIRC, For OSC control, after BIOS is done with (whatever initialization >>>> it needs to do), it clears a bit so that the OS can take over. This message, >>>> you are getting is a sign of a bug in the BIOS (usually). But I don't >>>> know if this is related to your problem. Does "dmesg | grep -e DMAR -e IOMMU" >>>> give anything useful ? >>> >>> Do not see anything useful in the output.. >> >> Ok, Thanks. Can you please post the output as well ? >> >>>>> [ 0.097072] acpi PNP0A03:00: fail to add MMCONFIG information, >>>>> can't access extended PCI configuration space under this bridge. >>>>> >>>>> Does this indicate any issue related to PCI passthrough? >>>>> >>>>> Would really appreciate any input on how to bebug this further. >>>> >>>> Did you get a chance to try a newer kernel ? >>> Currently am using 3.18.7-200.fc21.x86_64 which is pretty recent. >>> Are you suggesting trying the newer kernel just on the host? (or VM too?) >> Both preferably to 3.19. But it's just a wild guess. I saw i40e related fixes, >> particularly "i40e: fix un-necessary Tx hangs" in 3.19-rc5. This is not exactly >> what you are seeing but I was still wondering if it could help. > > Actually, Stefan suggests that support for this card is still sketchy > and your best bet is to try out net-next > http://git.kernel.org/cgit/linux/kernel/git/davem/net-next.git > > Also, could you please post more information about your hardware setup > (chipset/processor/firmware version on the card etc) ? Host CPU : Model name: Intel(R) Xeon(R) CPU E5-2630 v2 @ 2.60GHz Manufacturer Part Number: XL710QDA1BLK Ethernet controller: Intel Corporation Ethernet Controller XL710 for 40GbE QSFP+ (rev 01) #ethtool -i enp9s0 driver: i40e version: 1.2.6-k firmware-version: f4.22 a1.1 n04.24 e800013fd bus-info: 0000:09:00.0 supports-statistics: yes supports-test: yes supports-eeprom-access: yes supports-register-dump: yes supports-priv-flags: no > Thanks, > Bandan > >> Meanwhile, I am trying to get hold of a card myself to try and reproduce >> it at my end. >> >> Thanks, >> Bandan >> >>>>> On Fri, Mar 13, 2015 at 10:08 AM, jacob jacob <opstkusr@xxxxxxxxx> wrote: >>>>>>> So, it could be the i40e driver then ? Because IIUC, VFs use a separate >>>>>>> driver. Just to rule out the possibility that there might be some driver fixes that >>>>>>> could help with this, it might be a good idea to try a 3.19 or later upstream >>>>>>> kernel. >>>>>>> >>>>>> >>>>>> I tried with the latest DPDK release too (dpdk-1.8.0) and see the same issue. >>>>>> As mentioned earlier, i do not see any issues at all when running >>>>>> tests using either i40e or dpdk on the host itself. >>>>>> This is the reason why i am suspecting if it is anything to do with KVM/libvirt. >>>>>> Both with regular PCI passthrough and VF passthrough i see issues. It >>>>>> is always pointing to some issue with packet transmission. Receive >>>>>> seems to work ok. >>>>>> >>>>>> >>>>>> On Thu, Mar 12, 2015 at 8:02 PM, Bandan Das <bsd@xxxxxxxxxx> wrote: >>>>>>> jacob jacob <opstkusr@xxxxxxxxx> writes: >>>>>>> >>>>>>>> On Thu, Mar 12, 2015 at 3:07 PM, Bandan Das <bsd@xxxxxxxxxx> wrote: >>>>>>>>> jacob jacob <opstkusr@xxxxxxxxx> writes: >>>>>>>>> >>>>>>>>>> Hi, >>>>>>>>>> >>>>>>>>>> Seeing failures when trying to do PCI passthrough of Intel XL710 40G >>>>>>>>>> interface to KVM vm. >>>>>>>>>> 0a:00.1 Ethernet controller: Intel Corporation Ethernet >>>>>>>>>> Controller XL710 for 40GbE QSFP+ (rev 01) >>>>>>>>> >>>>>>>>> You are assigning the PF right ? Does assigning VFs work or it's >>>>>>>>> the same behavior ? >>>>>>>> >>>>>>>> Yes.Assigning VFs worked ok.But this had other issues while bringing down VMs. >>>>>>>> Interested in finding out if PCI passthrough of 40G intel XL710 >>>>>>>> interface is qualified in some specific kernel/kvm release. >>>>>>> >>>>>>> So, it could be the i40e driver then ? Because IIUC, VFs use a separate >>>>>>> driver. Just to rule out the possibility that there might be some driver fixes that >>>>>>> could help with this, it might be a good idea to try a 3.19 or later upstream >>>>>>> kernel. >>>>>>> >>>>>>>>>> From dmesg on host: >>>>>>>>>> >>>>>>>>>>> [80326.559674] kvm: zapping shadow pages for mmio generation wraparound >>>>>>>>>>> [80327.271191] kvm [175994]: vcpu0 unhandled rdmsr: 0x1c9 >>>>>>>>>>> [80327.271689] kvm [175994]: vcpu0 unhandled rdmsr: 0x1a6 >>>>>>>>>>> [80327.272201] kvm [175994]: vcpu0 unhandled rdmsr: 0x1a7 >>>>>>>>>>> [80327.272681] kvm [175994]: vcpu0 unhandled rdmsr: 0x3f6 >>>>>>>>>>> [80327.376186] kvm [175994]: vcpu0 unhandled rdmsr: 0x606 >>>>>>>>> >>>>>>>>> These are harmless and are related to unimplemented PMU msrs, >>>>>>>>> not VFIO. >>>>>>>>> >>>>>>>>> Bandan >>>>>>>> -- >>>>>>>> To unsubscribe from this list: send the line "unsubscribe kvm" in >>>>>>>> the body of a message to majordomo@xxxxxxxxxxxxxxx >>>>>>>> More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
