Some question about the PCIe drives and SR-IOV. setup:4x Ethernet transceivers (82576EB) à PLX PEX8624 switch -> E5520 chipset -> dual Xeon E5645 CPUs When tryiny to setup XEN (4.0.1) and PCI pass through, I was getting the following XEN error: “Error: pci: to avoid potential security issue, 0000:16:00.0 is not allowed to be assigned to guest since it is behind PCIe switch that does not support or enable ACS.” I was able to get around it by enabling the "(pci-passthrough-strict-check no)" in the /etc/xen/xend-config.sxp configuration file. When the below information, Can anyone tell me how much safe it is to use this CARD for SR-IOV. After reading through the following comments in the mailists, I am NOT sure if it is OK to ignore the above error. http://lkml.indiana.edu/hypermail/linux/kernel/0910.0/02595.html https://www.redhat.com/archives/libvir-list/2009-December/msg00709.html As you can see below, it using a PLX 8624. Will I be able to get the get such a configuration working with SR-IOV safely. Setup is something like bridge1 - bridge2 - Intel 82576 device | 2nd Intel 82576 device - bridge2 - Intel 82576 device 2nd Intel 82576 device .... (so forth) PCI-tree below: -[0000:00]-+-00.0 Intel Corporation 5520 I/O Hub to ESI Port +-03.0-[0d-17]----00.0-[0e-17]--+-04.0-[17]-- | +-05.0-[15-16]--+-00.0 Intel Corporation 82576 Gigabit Network Connection | | \-00.1 Intel Corporation 82576 Gigabit Network Connection | +-06.0-[13-14]--+-00.0 Intel Corporation 82576 Gigabit Network Connection | | \-00.1 Intel Corporation 82576 Gigabit Network Connection | +-08.0-[11-12]--+-00.0 Intel Corporation 82576 Gigabit Network Connection | | \-00.1 Intel Corporation 82576 Gigabit Network Connection | \-09.0-[0f-10]--+-00.0 Intel Corporation 82576 Gigabit Network Connection | \-00.1 Intel Corporation 82576 Gigabit Network Connection Bridge devices below: 0d:00.0 PCI bridge: PLX Technology, Inc. PEX 8624 24-lane, 6-Port PCI Express Gen 2 (5.0 GT/s) Switch [ExpressLane] (rev bb) 0e:04.0 PCI bridge: PLX Technology, Inc. PEX 8624 24-lane, 6-Port PCI Express Gen 2 (5.0 GT/s) Switch [ExpressLane] (rev bb) 0e:05.0 PCI bridge: PLX Technology, Inc. PEX 8624 24-lane, 6-Port PCI Express Gen 2 (5.0 GT/s) Switch [ExpressLane] (rev bb) 0e:06.0 PCI bridge: PLX Technology, Inc. PEX 8624 24-lane, 6-Port PCI Express Gen 2 (5.0 GT/s) Switch [ExpressLane] (rev bb) 0e:08.0 PCI bridge: PLX Technology, Inc. PEX 8624 24-lane, 6-Port PCI Express Gen 2 (5.0 GT/s) Switch [ExpressLane] (rev bb) 0e:09.0 PCI bridge: PLX Technology, Inc. PEX 8624 24-lane, 6-Port PCI Express Gen 2 (5.0 GT/s) Switch [ExpressLane] (rev bb) Bhanu -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
