Tested on QEMU and physical setups. 

I have one question about "Soft Reserve" parent entries in iomem.
On QEMU I see parent "Soft Reserved":

a90000000-b4fffffff : Soft Reserved
  a90000000-b4fffffff : CXL Window 0
    a90000000-b4fffffff : dax1.0
      a90000000-b4fffffff : System RAM (kmem)

While on my physical setup this is missing - not sure if this is okay?

BIOS-e820: [mem 0x0000002070000000-0x000000a06fffffff] soft reserved

2070000000-606fffffff : CXL Window 0
  2070000000-606fffffff : region0
    2070000000-606fffffff : dax0.0
      2070000000-606fffffff : System RAM (kmem)
6070000000-a06fffffff : CXL Window 1
  6070000000-a06fffffff : region1
    6070000000-a06fffffff : dax1.0
      6070000000-a06fffffff : System RAM (kmem)

Tested-by: Tomasz Wolski <[email protected]>

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