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Tsirkin" To: qemu-devel@nongnu.org Cc: Peter Maydell , CLEMENT MATHIEU--DRIF , Marcel Apfelbaum Subject: [PULL 29/97] pci: Add a memory attribute for pre-translated DMA operations Message-ID: <2dd51fc52a8b85e6f39d1297f338344ed03dc5b1.1752534227.git.mst@redhat.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent Received-SPF: pass client-ip=170.10.133.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: CLEMENT MATHIEU--DRIF The address_type bit will be set to PCI_AT_TRANSLATED by devices that use cached addresses obtained via ATS. Signed-off-by: Clement Mathieu--Drif Message-Id: <20250628180226.133285-2-clement.mathieu--drif@eviden.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- include/exec/memattrs.h | 3 +++ include/hw/pci/pci.h | 9 +++++++++ 2 files changed, 12 insertions(+) diff --git a/include/exec/memattrs.h b/include/exec/memattrs.h index 8db1d30464..52ee955249 100644 --- a/include/exec/memattrs.h +++ b/include/exec/memattrs.h @@ -54,6 +54,9 @@ typedef struct MemTxAttrs { */ unsigned int pid:8; + /* PCI - IOMMU operations, see PCIAddressType */ + unsigned int address_type:1; + /* * Bus masters which don't specify any attributes will get this * (via the MEMTXATTRS_UNSPECIFIED constant), so that we can diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index df3cc7b875..6b7d3ac8a3 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -134,6 +134,15 @@ struct PCIHostDeviceAddress { unsigned int function; }; +/* + * Represents the Address Type (AT) field in a PCI request, + * see MemTxAttrs.address_type + */ +typedef enum PCIAddressType { + PCI_AT_UNTRANSLATED = 0, /* Default when no attribute is set */ + PCI_AT_TRANSLATED = 1, +} PCIAddressType; + typedef void PCIConfigWriteFunc(PCIDevice *pci_dev, uint32_t address, uint32_t data, int len); typedef uint32_t PCIConfigReadFunc(PCIDevice *pci_dev, -- MST