In message: [linux-yocto][v6.1/standard/x86 and 
v6.1/standard/preempt-rt/x86][PATCH 0/1] Fix Intel Grand Ridge cannot boot issue
on 24/04/2024 Yongxin Liu wrote:

> 
> Hi Bruce,
> 
> Intel Grand Ridge cannot boot after the backport of commit a6a5006dad57
> ("iommu/vt-d: Retrieve IOMMU perfmon capability information"), in v6.1.83.
> 
> This patch is the second patch of the following patch series in mainline.
> 
>     d8a7c0cf05a2 2023-02-03 11:06 Kan Liang    iommu/vt-d: Enable IOMMU 
> perfmon support
>     4a0d4265659b 2023-02-03 11:06 Kan Liang    iommu/vt-d: Add IOMMU perfmon 
> overflow handler support
>     46284c6ceb5e 2023-02-03 11:06 Kan Liang    iommu/vt-d: Support cpumask 
> for IOMMU perfmon
>     7232ab8b89e9 2023-02-03 11:06 Kan Liang    iommu/vt-d: Add IOMMU perfmon 
> support
>     dc57875866ab 2023-02-03 11:06 Kan Liang    iommu/vt-d: Support Enhanced 
> Command Interface
>     a6a5006dad57 2023-02-03 11:06 Kan Liang    iommu/vt-d: Retrieve IOMMU 
> perfmon capability information
>     4db96bfe9d77 2023-02-03 11:06 Kan Liang    iommu/vt-d: Support size of 
> the register set in DRHD
> 
> It is strange only one patch was backported in linux-stable v6.1.
> Because in order to eable IOMMU perfmon, all patches should be backported.
> 
> Anyway, we need to back port the first patch to boot kernel on newer 
> hardware, such as Intel GrandRidge.
> 
> So please help to merge this patch to v6.1/standard/x86 and 
> v6.1/standard/preempt-rt/x86.

merged.

Bruce

> 
> 
> Thanks,
> Yongxin
> 
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