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[34.124.234.44]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2bd5c05f727sm206411835ad.19.2026.05.19.17.46.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 19 May 2026 17:46:55 -0700 (PDT) Date: Wed, 20 May 2026 00:46:47 +0000 From: Pranjal Shrivastava To: Samiullah Khawaja Cc: David Woodhouse , Lu Baolu , Joerg Roedel , Will Deacon , Jason Gunthorpe , Robin Murphy , Kevin Tian , Alex Williamson , Shuah Khan , iommu@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Saeed Mahameed , Adithya Jayachandran , Parav Pandit , Leon Romanovsky , William Tu , Pratyush Yadav , Pasha Tatashin , David Matlack , Andrew Morton , Chris Li , Vipin Sharma , YiFei Zhu Subject: Re: [PATCH v2 14/16] iommufd: Add APIs to preserve/unpreserve a vfio cdev Message-ID: References: <20260427175633.1978233-1-skhawaja@google.com> <20260427175633.1978233-15-skhawaja@google.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: <20260427175633.1978233-15-skhawaja@google.com> On Mon, Apr 27, 2026 at 05:56:31PM +0000, Samiullah Khawaja wrote: > Add APIs that can be used to preserve and unpreserve a vfio cdev. Use > the APIs exported by the IOMMU core to preserve/unpreserve device. > > The LUO token of the preserved iommufd is fetched and returned back to > the caller as that can be used during restore to get the restored > iommufd. Handle to the preserved state of the device is also returned to > reassociate with the restored state after live update kexec. > > Signed-off-by: Samiullah Khawaja > --- > drivers/iommu/iommufd/device.c | 102 ++++++++++++++++++++++++ > drivers/iommu/iommufd/iommufd_private.h | 3 + > include/linux/iommufd.h | 29 +++++++ > 3 files changed, 134 insertions(+) > The iommufd_device_replace() is ONLY reachable by VFIO which is blocked by PATCH 15. LGTM. Reviewed-by: Pranjal Shrivastava Thanks, Praan