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[34.142.255.199]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2c42f1f0f31sm139126615ad.2.2026.06.16.14.40.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Jun 2026 14:40:25 -0700 (PDT) Date: Tue, 16 Jun 2026 21:40:18 +0000 From: Pranjal Shrivastava To: Jacob Pan Cc: linux-kernel@vger.kernel.org, "iommu@lists.linux.dev" , Jason Gunthorpe , Alex Williamson , Joerg Roedel , Mostafa Saleh , David Matlack , Robin Murphy , Nicolin Chen , "Tian, Kevin" , Yi Liu , Baolu Lu , Saurabh Sengar , skhawaja@google.com, pasha.tatashin@soleen.com, Will Deacon Subject: Re: [PATCH v9 4/6] iommufd: Add an ioctl to query PA from IOVA for noiommu mode Message-ID: References: <20260611172658.3421138-1-jacob.pan@linux.microsoft.com> <20260611172658.3421138-5-jacob.pan@linux.microsoft.com> Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260611172658.3421138-5-jacob.pan@linux.microsoft.com> On Thu, Jun 11, 2026 at 10:26:56AM -0700, Jacob Pan wrote: > To support no-IOMMU mode where userspace drivers perform unsafe DMA > using physical addresses, introduce a new API to retrieve the > physical address of a user-allocated DMA buffer that has been mapped to > an IOVA via IOMMU_IOAS_MAP. The mapping is backed by SW-only I/O page > tables maintained by the GENERIC_PT framework. > > Reviewed-by: Lu Baolu > Reviewed-by: Kevin Tian > Suggested-by: Jason Gunthorpe > Co-developed-by: Jason Gunthorpe > Signed-off-by: Jason Gunthorpe > Signed-off-by: Jacob Pan Reviewed-by: Pranjal Shrivastava Thanks, Praan