----- Original Message -----
> From: "Jason Gunthorpe" <[email protected]>
> To: "Shivaprasad G Bhat" <[email protected]>
> Cc: "Timothy Pearson" <[email protected]>, "Alex Williamson"
> <[email protected]>, "linuxppc-dev"
> <[email protected]>, "Michael Ellerman" <[email protected]>,
> "npiggin" <[email protected]>, "christophe
> leroy" <[email protected]>, "aneesh kumar"
> <[email protected]>, "naveen n rao"
> <[email protected]>, "gbatra" <[email protected]>,
> [email protected], "Alexey Kardashevskiy"
> <[email protected]>, [email protected], "linux-kernel"
> <[email protected]>, "kvm" <[email protected]>, "aik"
> <[email protected]>, [email protected], "jroedel" <[email protected]>, "vaibhav"
> <[email protected]>, [email protected]
> Sent: Tuesday, March 19, 2024 9:32:02 AM
> Subject: Re: [RFC PATCH 1/3] powerpc/pseries/iommu: Bring back userspace view
> for single level TCE tables
> On Tue, Mar 12, 2024 at 01:14:20PM -0500, Shivaprasad G Bhat wrote:
>> The commit 090bad39b237a ("powerpc/powernv: Add indirect levels to
>> it_userspace") which implemented the tce indirect levels
>> support for PowerNV ended up removing the single level support
>> which existed by default(generic tce_iommu_userspace_view_alloc/free()
>> calls). On pSeries the TCEs are single level, and the allocation
>> of userspace view is lost with the removal of generic code.
>
> :( :(
>
> If this has been broken since 2018 and nobody cared till now can we
> please go in a direction of moving this code to the new iommu APIs
> instead of doubling down on more of this old stuff that apparently
> almost nobody cares about ??
>
> Jason
Just FYI Raptor is working on porting things over to the new APIs. RFC patches
should be posted in the next week or two.
