I'm not aware of any armhf hardware that has PCI and was supported by the 4.4 kernel. Calxeda gear maybe - but that was never officially released and I don't have access to it anyway.
I did regression test using the virt model in QEMU. System still boots, lspci smoke tests OK: ubuntu@ubuntu:~$ lspci 00:00.0 Host bridge: Red Hat, Inc. QEMU PCIe Host bridge Kernel messages during PCI probe look identical, except we now see ECAM messages (which makes sense, that support is new): 4.4.0+arm64acpipci.dmesg:[ 1.269192] PCI: CLS 0 bytes, default 64 4.4.0+arm64acpipci.dmesg:[ 6.708312] PCI host bridge /pcie@10000000 ranges: 4.4.0+arm64acpipci.dmesg:[ 6.747553] pci-host-generic 3f000000.pcie: PCI host bridge to bus 0000:00 4.4.0+arm64acpipci.dmesg:[ 6.792745] PCI: bus0: Fast back to back transfers disabled 4.4.0+arm64acpipci.dmesg:[ 7.012429] ehci-pci: EHCI PCI platform driver 4.4.0+arm64acpipci.dmesg:[ 7.037416] ohci-pci: OHCI PCI platform driver 4.4.0.dmesg:[ 1.309199] PCI: CLS 0 bytes, default 64 4.4.0.dmesg:[ 6.733705] PCI host bridge /pcie@10000000 ranges: 4.4.0.dmesg:[ 6.760085] pci-host-generic 3f000000.pcie: PCI host bridge to bus 0000:00 4.4.0.dmesg:[ 6.802961] PCI: bus0: Fast back to back transfers disabled 4.4.0.dmesg:[ 7.016247] ehci-pci: EHCI PCI platform driver 4.4.0.dmesg:[ 7.040325] ohci-pci: OHCI PCI platform driver -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1797092 Title: xenial guest on arm64 drops to busybux under openstack bionic-rocky To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1797092/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
