Re: [Xen-devel] [BUG] pci-passthrough on dom0 kernel versions above 3.8 crashes dom0

[Kristoffer Egefelt <kristoffer@xxxxxxx>]

Ah, I thought you meant that it worked, not that it needed testing ;-)

It works with your patch, dom0 do not crash anymore - it looks like this:

root@builder:/k# xl pci-attach vm '0000:01:12.3,permissive=1'

[ 1363.048348] pciback 0000:01:12.3: enabling permissive mode configuration space accesses!

[ 1363.229314] pciback 0000:01:12.3: permissive mode is potentially unsafe!

[ 1363.877218] xen_pciback: vpci: 0000:01:12.3: assign to virtual slot 0

root@builder:/k# [ 1364.077427] pciback 0000:01:12.3: enabling device (0000 -> 0002)

[ 1364.255582] ixgbe 0000:01:00.1 eth1: VF Reset msg received from vf 9

[ 1364.256144] ixgbe 0000:01:00.1: VF 9 has no MAC address assigned, you may have to assign one manually

(XEN) mm.c:807: d1: Forcing read-only access to MFN d5324

(XEN) mm.c:807: d0: Forcing read-only access to MFN d5324

(XEN) mm.c:618:d0 Could not get page ref for pfn d5324

(XEN) mm.c:618:d0 Could not get page ref for pfn d5324

(XEN) mm.c:618:d1 Could not get page ref for pfn d5324

root@builder:/k# xl destroy vm

(XEN) mm.c:618:d0 Could not get page ref for pfn d5324

(XEN) mm.c:618:d0 Could not get page ref for pfn d5324

libxl: error: libxl_device.c:1127:libxl__wait_for_backend: Backend /local/domain/0/backend/pci/1/0 not ready

(XEN) mm.c:618:d0 Could not get page ref for pfn d5324

(XEN) mm.c:618:d0 Could not get page ref for pfn d5324

(XEN) mm.c:618:d0 Could not get page ref for pfn d5324

(XEN) mm.c:618:d0 Could not get page ref for pfn d5324

On 10/10/2013, at 12.39.37, Jan Beulich <JBeulich@xxxxxxxx> wrote:

On 09.10.13 at 23:18, Kristoffer Egefelt <kristoffer@xxxxxxx> wrote:

Let me know if I can do anything to assist.

I am still awaiting your feedback on the effect the hypervisor side
patch (which I sent you almost a week ago) had on the hypervisor
crash you had observed in this context.

Jan


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