Re: [PATCH v2 06/10] iommu/arm-smmu-v3: Allocate vmid in arm_vsmmu_init

[Jason Gunthorpe]

On Tue, Jan 27, 2026 at 09:11:14AM -0800, Nicolin Chen wrote:
> > It is easy to understand that lifecycle by just allocating it for the
> > lifetime of the VSMMU..
> 
> Yea, it makes sense for that matter.
> 
> So, perhaps:
> 
> VMID owned by a vSMMU should be allocated in the viommu_init callback for
>  - a straightforward lifecycle for a VMID used by a vSMMU
>  - HW like tegra241-cmdqv needs to setup VINTF with the VMID

Yeah, the cmdqv should take the VMID from the vSMMU and that is a good
reason to pre-allocate it since it won't go through the invalidation
list.

Jason