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apport-collect 1859212
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This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1859212
Title:
Move pci-hyperv.ko from linux-modules-extra to support installation to
Hyper-V using DDA
Status in linux package in Ubuntu:
Incomplete
Bug description:
Move "pci-hyperv.ko" to the primary kernel image package.
Whilst attempting a 20.04 install into a Microsoft Windows Hyper-V
guest that uses Discrete Device Assignment (DDA a.k.a. PCI pass-
through) for 2x NVMe SSDs and Intel i350-T4 quad-port Gigabit Ethernet
we found that the installer kernel (ubuntu-server) does not include
the "drivers/pci/controller/pci-hyperv.ko" module that is required for
Linux to discover the Hyper-V para-virtualised PCI bus.
Eventually discovered the module in the installer ISO's
/pool/main/l/linux/linux-modules-extra-`uname-r`_amd64.deb and were
able to manually install it with:
# udpkg --unpack /cdrom/pool/main/l/linux/linux-modules-extra-`uname
-r`_amd64.deb
# depmod
After which it could be loaded ("pci-hyperv-intf.ko" is already
installed):
# modprobe pci-hyperv-intf
# modprobe pci-hyperv
At this point it is possible to use the NVMe devices.
We used 'mdadm' to create a RAID-1 mirror and then returned to the
installer and were able to use the partitioner to install the root
file-system to NVMe, although it is worth noting that GRUB has to be
installed to a Hyper-V virtual storage device (a Hyper-V file on NTFS)
in order to boot since the guest UEFI nor GRUB can 'see' any PCI
devices without help from a para-virtualisation driver.
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