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a="58878186" X-IronPort-AV: E=Sophos;i="6.18,233,1751266800"; d="scan'208";a="58878186" X-CSE-ConnectionGUID: Y08t34jhQcmKyODJS5b6yQ== X-CSE-MsgGUID: GDoKVTtqRY63G6SDifAzEg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.18,233,1751266800"; d="scan'208";a="175634762" From: Vivek Kasireddy To: qemu-devel@nongnu.org Cc: Vivek Kasireddy Subject: [RFC 1/6] linux-headers: Update vfio.h to include VFIO_DEVICE_FEATURE_DMA_BUF Date: Tue, 2 Sep 2025 22:42:14 -0700 Message-ID: <20250903054438.1179384-2-vivek.kasireddy@intel.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250903054438.1179384-1-vivek.kasireddy@intel.com> References: <20250903054438.1179384-1-vivek.kasireddy@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=198.175.65.20; envelope-from=vivek.kasireddy@intel.com; helo=mgamail.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1756878483053116600 Content-Type: text/plain; charset="utf-8" Signed-off-by: Vivek Kasireddy --- linux-headers/linux/vfio.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/linux-headers/linux/vfio.h b/linux-headers/linux/vfio.h index 79bf8c0cc5..d2177c9cba 100644 --- a/linux-headers/linux/vfio.h +++ b/linux-headers/linux/vfio.h @@ -1468,6 +1468,31 @@ struct vfio_device_feature_bus_master { }; #define VFIO_DEVICE_FEATURE_BUS_MASTER 10 =20 +/** + * Upon VFIO_DEVICE_FEATURE_GET create a dma_buf fd for the + * regions selected. + * + * open_flags are the typical flags passed to open(2), eg O_RDWR, O_CLOEXE= C, + * etc. offset/length specify a slice of the region to create the dmabuf f= rom. + * nr_ranges is the total number of (P2P DMA) ranges that comprise the dma= buf. + * + * Return: The fd number on success, -1 and errno is set on failure. + */ +#define VFIO_DEVICE_FEATURE_DMA_BUF 11 + +struct vfio_region_dma_range { + __u64 offset; + __u64 length; +}; + +struct vfio_device_feature_dma_buf { + __u32 region_index; + __u32 open_flags; + __u32 flags; + __u32 nr_ranges; + struct vfio_region_dma_range dma_ranges[]; +}; + /* -------- API for Type1 VFIO IOMMU -------- */ =20 /** --=20 2.50.1