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

Tim Gardner tim.gardner at canonical.com
Thu Jun 16 15:30:18 UTC 2022


On 6/2/22 00:32, Koba Ko 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(-)
> 
Acked-by: Tim Gardner <tim.gardner at canonical.com>

Both patches are now in linux-next

-- 
-----------
Tim Gardner
Canonical, Inc



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