NVME M.2 Passthrough

[Meloay]

Hopefully someone will show us how to install the patch to Unraid. unraid ver:6.11.1

[126f:2263] 06:00.0 Non-Volatile memory controller: Silicon Motion, Inc. SM2263EN/SM2263XT SSD Controller (rev 03)

internal error: process exited while connecting to monitor: qxl_send_events: spice-server bug: guest stopped, ignoring 2022-10-21T07:22:48.020846Z qemu-system-x86_64: -device {"driver":"vfio-pci","host":"0000:06:00.0","id":"hostdev0","bus":"pci.0","addr":"0x5"}: vfio 0000:06:00.0: failed to add PCI capability 0x11[0x50]@0xb0: table & pba overlap, or they don't fit in BARs, or don't align

[ghost82]

14 minutes ago, Meloay said:

table & pba overlap

It's not unraid nor qemu fault, it's the device that is bugged.

If you check the device capabilities you will find something like:

	Capabilities: [b0] MSI-X: Enable- Count=22 Masked-
		Vector table: BAR=0 offset=00002000
		PBA: BAR=0 offset=00002100

In this example you have Count 22 and vector table with offset 0x2000; each vector table entry is 16 bytes, so 16x22 is 352 bytes; this means that it will extend to 0x2000+0x352 --> 0x2352 so the second offset is wrong.

You can try to add an alias to the nvme pcie device in the xml and use qemu override custom argument:

    <qemu:override>
      <qemu:device alias='YOURALIASHERE'>
        <qemu:frontend>
          <qemu:property name='x-msix-relocation' type='string' value='bar2'/>
        </qemu:frontend>
      </qemu:device>
    </qemu:override>

Didn't try with 6.11.x, in 6.10.x it was not possible because of bugs.

Edited October 21, 2022 by ghost82