[Bug 1976587] Re: Fix can't boot up after change to vmd

** Description changed:

[Impact]
+ the previous commit has been SRUed that enable CONFIG_INTEL_IOMMU_DEFAULT_ON.
+ https://bugs.launchpad.net/subiquity/+bug/1937295
+ but it would caused the regression with AMD/NVIDIA GPUs.
+ https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1965882
+ https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1971146
+
+ [Fix]
+ Revert the vmd: Revert 2565e5b69c44 ("PCI: vmd: Do not disable MSI-X remapping if interrupt remapping is enabled by IOMMU.")
+ Assign VMD irq domain before enumeration, irq domain comes from pci driver.
+
+ [Test Case]
+ 1. In BIOS, change to VMD
+ 2. Check if SKU could boot-up.
+
+ [Where problems could occur]
+ it reduce the affected region to only VMD.

** Tags added: oem-priority originate-from-1967153 somerville

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https://bugs.launchpad.net/bugs/1976587

Title:
Fix can't boot up after change to vmd

Status in HWE Next:
New
Status in linux package in Ubuntu:
In Progress
Status in linux-oem-5.14 package in Ubuntu:
New
Status in linux-oem-5.17 package in Ubuntu:
New
Status in linux source package in Focal:
New
Status in linux-oem-5.14 source package in Focal:
In Progress
Status in linux-oem-5.17 source package in Focal:
New
Status in linux source package in Jammy:
In Progress
Status in linux-oem-5.14 source package in Jammy:
New
Status in linux-oem-5.17 source package in Jammy:
In Progress
Status in linux source package in Kinetic:
In Progress
Status in linux-oem-5.14 source package in Kinetic:
New
Status in linux-oem-5.17 source package in Kinetic:
New

Bug description:
[Impact]
the previous commit has been SRUed that enable CONFIG_INTEL_IOMMU_DEFAULT_ON.
https://bugs.launchpad.net/subiquity/+bug/1937295
but it would caused the regression with AMD/NVIDIA GPUs.
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1965882
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1971146

[Fix]
Revert the vmd: Revert 2565e5b69c44 ("PCI: vmd: Do not disable MSI-X remapping if interrupt remapping is enabled by IOMMU.")
Assign VMD irq domain before enumeration, irq domain comes from pci driver.

[Test Case]
1. In BIOS, change to VMD
2. Check if SKU could boot-up.

[Where problems could occur]
it reduce the affected region to only VMD.

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