Re: [PATCH 0/3] iommu/amd: Fix unable to handle page fault due to AVIC

[Suthikulpanit, Suravee]

Joerg,

Here is an dditional tags for this series:

Fixes: 8bda0cfbdc1a ("iommu/amd: Detect and initialize guest vAPIC log")

Are there any concerns with this series?

Thanks
Suravee

On 8/20/2021 3:29 PM, Suravee Suthikulpanit wrote:
> This bug is triggered when rebooting VM on a system which
> SVM AVIC is enabled but IOMMU AVIC is disabled in the BIOS.
>
> The series reworks interrupt remapping intialiation to
> check for IOMMU AVIC support (GAMSup) at earlier stage using
> EFR provided by IVRS table instead of the PCI MMIO register,
> which is available after PCI support for IOMMU is initialized.
> This helps avoid having to disable and clean up the already
> initialized interrupt-remapping-related parameter.
>
> Thanks,
> Suravee
>
> Suravee Suthikulpanit (2):
>    iommu/amd: Introduce helper function to check feature bit on all
>      IOMMUs
>    iommu/amd: Remove iommu_init_ga()
>
> Wei Huang (1):
>    iommu/amd: Relocate GAMSup check to early_enable_iommus
>
>   drivers/iommu/amd/init.c | 45 ++++++++++++++++++++++------------------
>   1 file changed, 25 insertions(+), 20 deletions(-)