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[142.68.80.239]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7a806d88943sm626411585a.133.2024.09.04.09.13.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 04 Sep 2024 09:13:50 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.95) (envelope-from ) id 1slsdi-004lkN-4t; Wed, 04 Sep 2024 13:13:50 -0300 Date: Wed, 4 Sep 2024 13:13:50 -0300 From: Jason Gunthorpe To: Joel Granados Cc: Klaus Jensen , David Woodhouse , Lu Baolu , Joerg Roedel , Will Deacon , Robin Murphy , Kevin Tian , Minwoo Im , linux-kernel@vger.kernel.org, iommu@lists.linux.dev, Klaus Jensen Subject: Re: [PATCH RFC PREVIEW 0/6] iommu: enable user space iopfs in non-nested and non-svm cases Message-ID: <20240904161350.GE1909087@ziepe.ca> References: <20240826-iopf-for-all-v1-0-59174e6a7528@samsung.com> <20240826135955.GI3468552@ziepe.ca> <20240902104819.a2jto6l3tv2h5wvq@joelS2.panther.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: <20240902104819.a2jto6l3tv2h5wvq@joelS2.panther.com> On Mon, Sep 02, 2024 at 12:48:19PM +0200, Joel Granados wrote: > > > Supplementary repositories supporting this patchset: > > > 1. A user space library libvfn [1] which is used for testing and > > > verification (see examples/iopf.c), and > > > > That's pretty neat, I've been wanting to see some kind of IOMMU test > > suite based around a capable widely available device. This is the > > closest I've seen.. > > Yes! This is an obvious application of libvfn. Do you see it as a > something that can be included in tools/selftests/iommu? Maybe? What would it look like in-kernel? I've been thinking the same thing with mlx5 Maybe some kind of test runner with a plugin driver that has some kind of 'do dma', 'generate interrupt', etc sort of operations, IDK. Jason