@QuanXian, actually it is in 20.04 LTS now. It's landed to generic
kernel and has also been included in 20.04 iso. You should be able to
boot a vmd-featured machine with Focal generic kernel.

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https://bugs.launchpad.net/bugs/1855954

Title:
  [TGL] VMD support in TGL

Status in HWE Next:
  Fix Released
Status in intel:
  Fix Committed
Status in OEM Priority Project:
  New
Status in linux package in Ubuntu:
  Fix Released

Bug description:
  [SRU Justification]

  [Impact]
  On platforms with VMD support, block devices won't be scanned if VMD
  controller is not previously probed.

  [Fix]
  Two commits from v5.5-rc1 to be backported.

  [Test Case]
  On platforms with VMD support, boot with prebuilt kernel and check if
  Intel Volume Management Device appears among PCI devices:

    $ lspci | grep 'Volume Management Device'
    0000:00:0e.0 RAID bus controller: Intel Corporation Volume Management
  Device NVMe RAID Controller

  [Regression Potential]
  Low. This only enables VMD controller on platforms with such device.

  ========== original description ==========

  Description:
  VMD support in Tiger Lake Platform

  Target Kernel: TBD
  Target Release: 20.10

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