From: Jason Gunthorpe <jgg@ziepe.ca>
To: Shivaprasad G Bhat <sbhat@linux.ibm.com>
Cc: tpearson@raptorengineering.com, alex.williamson@redhat.com,
linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au,
npiggin@gmail.com, christophe.leroy@csgroup.eu,
aneesh.kumar@kernel.org, naveen.n.rao@linux.ibm.com,
gbatra@linux.vnet.ibm.com, brking@linux.vnet.ibm.com,
aik@ozlabs.ru, robh@kernel.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, aik@amd.com, msuchanek@suse.de,
jroedel@suse.de, vaibhav@linux.ibm.com, svaidy@linux.ibm.com
Subject: Re: [RFC PATCH 1/3] powerpc/pseries/iommu: Bring back userspace view for single level TCE tables
Date: Tue, 19 Mar 2024 11:32:02 -0300 [thread overview]
Message-ID: <20240319143202.GA66976@ziepe.ca> (raw)
In-Reply-To: <171026725393.8367.17497620074051138306.stgit@linux.ibm.com>
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
next prev parent reply other threads:[~2024-03-19 17:54 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-12 18:14 [RFC PATCH 0/3] powerpc: pSeries: vfio: iommu: Re-enable support for SPAPR TCE VFIO Shivaprasad G Bhat
2024-03-12 18:14 ` [RFC PATCH 1/3] powerpc/pseries/iommu: Bring back userspace view for single level TCE tables Shivaprasad G Bhat
2024-03-19 14:32 ` Jason Gunthorpe [this message]
2024-03-19 18:36 ` Timothy Pearson
2024-10-03 13:38 ` Jason Gunthorpe
2024-03-20 15:29 ` Shivaprasad G Bhat
2024-03-22 5:49 ` Michael Ellerman
2024-03-12 18:14 ` [RFC PATCH 2/3] powerpc/iommu: Move pSeries specific functions to pseries/iommu.c Shivaprasad G Bhat
2024-03-12 18:14 ` [RFC PATCH 3/3] pseries/iommu: Enable DDW for VFIO TCE create Shivaprasad G Bhat
2024-03-13 12:53 ` Michael Ellerman
2024-03-26 4:56 ` Shivaprasad G Bhat
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