Re: [PATCH v6 2/6] iommufd: Add IOMMU_HWPT_INVALIDATE

[Jason Gunthorpe]

On Tue, Nov 28, 2023 at 05:09:07PM -0800, Nicolin Chen wrote:

> > > With that being said, I think errno (-EIO) could do the job,
> > > as you suggested too.
> > 
> > Do we have any idea what HW failures can be generated by the commands
> > this will execture? IIRC I don't remember seeing any smmu specific
> > codes related to invalid invalidation? Everything is a valid input?
> 
> "7.1 Command queue errors" has the info.

Hmm CERROR_ATC_INV_SYNC needs to be forwarded to the guest somehow

Jason