MMU enabled in BIOS but not active in Q4 rc5

[decnet]

Qubes OS version:

Qubes Release 4.0 (R4.0)

Affected component(s):

core

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Steps to reproduce the behavior:

qvm-start sys-net

Expected behavior:

IOMMU should be enabled and the VMs should start without error.

Actual behavior:

When I start any non-template VM I get the following error:

start failed: internal error: libxenlight failed to create new domain 'sys-net', see /var/log/libvirt/libxl-driver.log for details

and in var/log/libvirt/libxl-driver.log for details
...libxl__device_pci_add: PCI device 0000:00:19.0 cannot be assigned - no IOMMU? ...libxl__add_pcidevs: libxl_device_pci_add failed -1 ...libxlcreate_attach_devices: unable to add pci devices

General notes:

MMU is enabled in the BIOS, however is shown as "not active" when I run qubes-hcl-report. I've been running Q3.2 for ages with no problems, but i've not attempted to run any previous 4.0 release candidates. Its a lenovo x230.

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Related issues:

[marmarek]

Qubes 3.2 did not strictly required IOMMU (but it improved security there), now it is strictly required. So it's possible it didn't worked there either.
Anyway, I suspect there is some hardware related issue. You may need to update BIOS.
See xl dmesg output for details.

[marmarek]

Qubes 3.2 did not strictly required IOMMU (but it improved security there), now it is strictly required. So it's possible it didn't worked there either.
Anyway, I suspect there is some hardware related issue. You may need to update BIOS.
See xl dmesg output for details.

[decnet]

Updated BIOS to 2.70 and now it works. Thanks for your help!

[decnet]

Updated BIOS to 2.70 and now it works. Thanks for your help!