Re: [PATCH v3] iommu/vt-d: Make DMAR_UNITS_SUPPORTED a config setting

[Baolu Lu]

On 2022/6/23 10:51, Jerry Snitselaar wrote:
> > The real problem here is that the iommu sequence ID overflows if
> > DMAR_UNITS_SUPPORTED is not big enough. This is purely a software
> > implementation issue, I am not sure whether user opt-in when building a
> > kernel package could help a lot here.
> Is this something that could be figured out when parsing the dmar
> table? It looks like currently iommu_refcnt[], iommu_did[], and
> dmar_seq_ids[] depend on it.

That's definitely a better solution.

Best regards,
baolu