On 03.08.2021 15:12, Marek Marczykowski-Górecki wrote: > 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.
I agree with both statements. What I disagree with is that the latter happens by default (instead of only upon admin override), including the case of intremap being unavailable in the first place. Jan
