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[142.167.56.70]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4ab3d44b3d6sm51417661cf.56.2025.07.16.05.10.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Jul 2025 05:10:37 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1uc0y4-00000008xUh-2T4l; Wed, 16 Jul 2025 09:10:36 -0300 Date: Wed, 16 Jul 2025 09:10:36 -0300 From: Jason Gunthorpe To: "Temerkhanov, Sergey" , Dan Williams Cc: "iommu@lists.linux.dev" , "linux-kernel@vger.kernel.org" , David Woodhouse , Lu Baolu , Joerg Roedel , Will Deacon , Robin Murphy Subject: Re: [PATCH v1 0/4] Implement IOMMU SVA page fault processing error notifiers Message-ID: <20250716121036.GA2120051@ziepe.ca> References: <20250710134215.97840-1-sergey.temerkhanov@intel.com> <20250714145658.GH1870174@ziepe.ca> 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: On Wed, Jul 16, 2025 at 11:07:50AM +0000, Temerkhanov, Sergey wrote: > > -----Original Message----- > > From: Jason Gunthorpe > > > > You need to come with a driver using this as well. > > > > There is an OOT driver which would use this facility do report and > handle possible invalid accesses (e.g. mismatched VMA permissions) > during the SVA operation Upstream a basic driver first then ask for iommu changes to enhance it. This is normal stuff, we don't change the kernel to accomodate OOT drivers. Jason