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Re: [PATCH] VT-d: Tylersburg errata apply to further steppings

On Tue, Aug 03, 2021 at 03:06:50PM +0200, Jan Beulich wrote:
> On 03.08.2021 15:01, Marek Marczykowski-Górecki wrote:
> > Ok, then, just setting iommu_intremap=false should do the right thing,
> ... if "iommu=force" is in use (but not otherwise), ...

But that's the purpose of iommu=force, no?
With "iommu=force": strictly require IOMMU
Without "iommu=force": use IOMMU on best-effort basis

It makes sense to refuse the boot if intremap is broken in the first
case. But also, it makes sense to allow using IOMMU without intremp in
the second case.

Best Regards,
Marek Marczykowski-Górecki
Invisible Things Lab

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