[+to linux-pci, +cc Alex] On Sun, Oct 26, 2014 at 7:56 AM, <bugzilla-daemon@xxxxxxxxxxxxxxxxxxx> wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=86951 > > Bug ID: 86951 > Summary: iommu regression > Product: Drivers > Version: 2.5 > Kernel Version: 3.13 > Hardware: All > OS: Linux > Tree: Mainline > Status: NEW > Severity: normal > Priority: P1 > Component: PCI > Assignee: drivers_pci@xxxxxxxxxxxxxxxxxxxx > Reporter: nodenet@xxxxxxxxxxx > Regression: No > > I am trying to make a Digium TDM410 PCI card available to a guest VM via VT-d / > IOMMU. This appears to work under kernel 3.2 but not via any later kernel > tested since. > > I noted pci_find_upstream_pcie_bridge errors > (https://bugzilla.kernel.org/show_bug.cgi?id=44881) which appear resolved in > 3.17 and above but was advised to file a new bug as this appears to be a new > problem. > > Working kernel linux 3.2.0-70-generic > Tested but not working 3.5.0-54-generic, 3.13.0-37-generic, > 3.16.6-031606-generic, 3.17.1-031701-generic or 3.18.0-031800rc1-generic. > > 3.17.1 and 3.18.0-rc1 resolve the pci_find_upstream_pcie_bridge error message > both still have the DMAR errors, the later has both read and write errors. > > https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1385388 > > I believe this type of configuration is often achieved using Xen but I am using > virtualbox 4.1.34 and it is possible there are some quirks associated with my > motherboard. > > Motherboard: Gigabyte Technology Co., Ltd. Z87X-D3H/Z87X-D3H-CF, BIOS F9 > 08/25/2014 (latest) > > 03:00.0 Ethernet controller: Digium, Inc. Wildcard TDM410 4-port analog card > (rev 11) > 03:00.0 0200: d161:8005 (rev 11) > > 02:00.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 41) (prog-if 01 > [Subtractive decode]) > 02:00.0 0604: 8086:244e (rev 41) > > typical errors shown on the host when module loaded via modprobe in the > guest.... > > Oct 26 06:35:39 kernel: [ 227.795652] dmar: DRHD: handling fault status reg 3 > Oct 26 06:35:39 kernel: [ 227.795678] dmar: DMAR:[DMA Read] Request device > [03:00.0] fault addr 73ac6000 > Oct 26 06:35:39 kernel: [ 227.795678] DMAR:[fault reason 06] PTE Read access is > not set > > Modprobe freezes in the guest, guest is causing a high cpu load and freezes on > reboot due to possible spin lock. > > -- > You are receiving this mail because: > You are watching the assignee of the bug. -- 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
