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[142.68.80.239]) by smtp.gmail.com with ESMTPSA id co13-20020a05683065cd00b006ee2fc97885sm2030608otb.72.2024.05.06.10.43.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 06 May 2024 10:43:58 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.95) (envelope-from ) id 1s42NZ-003UHM-8o; Mon, 06 May 2024 14:43:57 -0300 Date: Mon, 6 May 2024 14:43:57 -0300 From: Jason Gunthorpe To: Shivaprasad G Bhat Cc: Alexey Kardashevskiy , mpe@ellerman.id.au, tpearson@raptorengineering.com, alex.williamson@redhat.com, linuxppc-dev@lists.ozlabs.org, 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, ruscur@russell.cc, robh@kernel.org, linux-kernel@vger.kernel.org, joel@jms.id.au, kvm@vger.kernel.org, msuchanek@suse.de, oohall@gmail.com, mahesh@linux.ibm.com, jroedel@suse.de, vaibhav@linux.ibm.com, svaidy@linux.ibm.com Subject: Re: [RFC PATCH v2 0/6] powerpc: pSeries: vfio: iommu: Re-enable support for SPAPR TCE VFIO Message-ID: <20240506174357.GF901876@ziepe.ca> References: <171450753489.10851.3056035705169121613.stgit@linux.ibm.com> <20240501140942.GA1723318@ziepe.ca> <703f15b0-d895-4518-9886-0827a6c4e769@amd.com> <8c28a1d5-ac84-445b-80e6-a705e6d7ff1b@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8c28a1d5-ac84-445b-80e6-a705e6d7ff1b@linux.ibm.com> On Sat, May 04, 2024 at 12:33:53AM +0530, Shivaprasad G Bhat wrote: > We have legacy workloads using VFIO in userspace/kvm guests running > on downstream distro kernels. We want these workloads to be able to > continue running on our arch. It has been broken since 2018, I don't find this reasoning entirely reasonable :\ > I firmly believe the refactoring in this patch series is a step in > that direction. But fine, as long as we are going to fix it. PPC really needs this to be resolved to keep working. Jason