Date: Wed, 30 May 2012 17:39:39 -0700 From: Shesha Sreenivasamurthy <sheshas@gmail.com> To: freebsd-questions@freebsd.org Subject: VT-d not working for FreeBSD 9.0 guest with IXGBE Message-ID: <CABL7MgHtAPeCFeq5C%2B5E%2BL4oA%2B6ck4kha4ndvGXMdSXvJs3kag@mail.gmail.com>
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Hi, I have an issue with enabling VT-d with freebsd guest and was wondering of anyone out there are experiencing the similar issues. I am using the following setup HOST: Centos 6.2 Hypervisor: KVM Hardware: ixgbe 82599EB (10 GB nic) Guest: freebsd 9.0 Guest Driver version 2.4.4 When I use MSI/MSIX the link status is shown as "no carrier". When I disable MSI and MSIX in the guest so that it can fall back on INTx, I see that the link becomes active. However not packets are sent or received. When pinged from outside, sysctl shows dev.ix.0.queue0.txd_head: 0 dev.ix.0.queue0.rxd_head: 0 dev.ix.0.queue0.rxd_tail: 2047 dev.ix.0.queue0.rx_packets: 0 dev.ix.0.mac_stats.good_octets_rcvd: 320 dev.ix.0.mac_stats.good_pkts_rcvd: 5 When pinged from inside, sysctl shows dev.ix.0.queue0.txd_head: 0 dev.ix.0.queue0.rxd_head: 0 dev.ix.0.queue0.txd_tail: 4 dev.ix.0.queue0.rxd_tail: 2047 dev.ix.0.queue0.tx_packets: 4 dev.ix.0.queue0.rx_packets: 0 dev.ix.0.mac_stats.good_octets_rcvd: 320 dev.ix.0.mac_stats.good_pkts_rcvd: 5 dev.ix.0.mac_stats.good_octets_txd: 0 dev.ix.0.mac_stats.good_pkts_txd: 0 I guess, hardware is getting the packets but not put in the ringbuffer. If I install freebsd 9.0 on bare metel and have the same hardware and same driver running, the link comes up and packets are transferred. Therefore, in case of VT-d (PCI passthrough) the driver is not setting up things correctly. Another data point is, if Centos guests is used instead of freebsd guest, the hardware comes up correctly and can send/receive packets. The freebsd driver that I am using is the one posted on the intel's website. http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&ProdId=3189&DwnldID=14688&ProductFamily=Ethernet+Components&ProductLine=Ethernet+Controllers&ProductProduct=Intel%C2%AE+82599+10+Gigabit+Ethernet+Controller&DownloadType=Drivers&OSFullname=FreeBSD*eng
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