virtualbox.org

Hi,
since almost a year I use PCI passthrough successfully on an Ububtu 12.04 host (guest is Win7).
viewtopic.php?f=7&t=49322&p=238575&hili ... gh#p238575

The host kernel was 3.2.x. Recently I upgraded the kernel to 3.8.x. Now the PCI passthrough fails. In the syslog I find this after the VM has been started:

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[23563.237010] created IOMMU domain ffff88000f2c2b00
[23573.529777] dmar: DMAR:[DMA Read] Request device [00:1d.0] fault addr d4c9e000 
[23573.529777] DMAR:[fault reason 06] PTE Read access is not set

Is this a known effect? Or would you guys expect it to work fine? Does this ring a bell with somebody? Any hints are very welcome!
Windows (guest) sees the device (a USB host), but cannot start it (Error 43).

I also tried with 3.10 and 3.11 kernels - same result.
Running the old 3.2 kernel does not show the error.

Thanks!

Hi,
just an update since the problem still exists.
Now using Ubuntu 14.04 with kernel 4.2 from Wily. VB is 5.016.

syslog

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vboxpci 0000:00:1d.0: reg=0 start=f7f17000 size=1024
DMAR: DRHD: handling fault status reg 3
DMAR: DMAR:[DMA Read] Request device [00:1d.0] fault addr 697e2000 
DMAR:[fault reason 06] PTE Read access is not set

kernel cmd line:

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iommu=pt intel_iommu=on intel_iommu=igfx_off

I also ensured that xhci/ehci handover is disabled in BIOS (since this is a USB controller).

With a Linux guest, I see the device with lspci, but it probably does not get interrupts.
My guess is that the above failure prevents them to get passed into the VM.

The log file with a Linux guest.

Yes this is still issue with Ubuntu 16.04 + VirtualBox 5.0.20.
I've got devices that successfully run under QEMU-KVM, but do not want to work in VirtualBox.

This clearly VB issue, too bad they are not fixing this.

virtualbox.org

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[4.2.16] PCI passthrough now fails with newer kernels

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Re: [4.2.16] PCI passthrough now fails with newer kernels

Re: [4.2.16] PCI passthrough now fails with newer kernels