ACK: [PATCH 0/2][SRU][J/U/OEM-5.17/OEM-5.14] Fix can't boot up after change to vmd

[Luke Nowakowski-Krijger]

Acked-by: Luke Nowakowski-Krijger <luke.nowakowskikrijger at canonical.com>

On Wed, Jun 1, 2022 at 11:33 PM Koba Ko <koba.ko at canonical.com> wrote:

> BugLink: https://bugs.launchpad.net/bugs/1976587
>
> [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.
>
> Nirmal Patel (2):
>   PCI: vmd: Assign VMD IRQ domain before enumeration
>   PCI: vmd: Revert 2565e5b69c44 ("PCI: vmd: Do not disable MSI-X
>     remapping if interrupt remapping is enabled by IOMMU.")
>
>  drivers/pci/controller/vmd.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
>
> --
> 2.34.1
>
>
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