[PATCH v9 07/12] iommu/arm-smmu-v3-kexec: Add ASID/VMID reservation helpers

[Jason Gunthorpe]

On Sat, Aug 22, 2026 at 11:51:58AM -0700, Nicolin Chen wrote:
> On Fri, Aug 21, 2026 at 08:15:26PM -0300, Jason Gunthorpe wrote:
> > > +/**
> > > + * arm_smmu_kexec_unresv_ids() - Roll back a failing reservation scan
> > > + * @smmu: SMMU device of this kernel that failed its reservation scan
> > 
> > And wouldn't need this either.
> > 
> > Actually I think this is overkill regardless, just leave the xarray with ASIDs
> > reserved. Who cares?
> 
> ASID might be 8-bit that would have limited ASID slots. And it's
> a quite small step, so I think it might be worth keeping it.

Once you have it per smmu just clear the entire xarray on some
failure

Jason