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bh=w3CdxFmDkghBhZU+EeJss4FDl+MilK9UCJU2qsqidD0=; b=GpMn11dGBCGUSSfyNwgozyLcno+gmbZkBNF82LdcLwB750dxfFt8Ud4Fjmi8z1CVrpLWCG Im0+bDfu/KhooDSKLG31gKP+zHs9160euMOfE7rejnwmLYCLwZRTKXuBSZIoSHanbI0NnE itiyb3My8ji8qxYSkPKQPhXn5OtrMTI= X-MC-Unique: kKPI23l6N-aYcSqG6ds7qQ-1 From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, jean-philippe@linaro.org, alex.williamson@redhat.com, peter.maydell@linaro.org, zhenzhong.duan@intel.com, peterx@redhat.com, yanghliu@redhat.com, pbonzini@redhat.com Cc: mst@redhat.com, clg@redhat.com Subject: [RFC 1/7] hw/pci: Introduce PCIIOMMUOps::set_host_iova_regions Date: Wed, 17 Jan 2024 09:02:05 +0100 Message-ID: <20240117080414.316890-2-eric.auger@redhat.com> In-Reply-To: <20240117080414.316890-1-eric.auger@redhat.com> References: <20240117080414.316890-1-eric.auger@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.5 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=170.10.129.124; envelope-from=eric.auger@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -38 X-Spam_score: -3.9 X-Spam_bar: --- X-Spam_report: (-3.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.806, 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_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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 @redhat.com) X-ZM-MESSAGEID: 1705478738662100003 Content-Type: text/plain; charset="utf-8" This new callback will be used to convey usable IOVA regions from VFIO-PCI devices to vIOMMUS (esp. virtio-iommu). The advantage is that this callback can be called very early, once the device has is known to be protected by a vIOMMU, after the get_address_space() has been called by the parent device. Current solution to convey IOVA regions relies on IOMMU MR callbacks but this requires an IOMMU MR to be connected with the VFIO-PCI device which generally comes with the enablement of the IOMMU MR (vIOMMU protection activated). The downside is that is comes pretty late and in case of virtio-iommu, after the probe. Signed-off-by: Eric Auger --- include/hw/pci/pci.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h index fa6313aabc..63c018b35a 100644 --- a/include/hw/pci/pci.h +++ b/include/hw/pci/pci.h @@ -385,6 +385,21 @@ typedef struct PCIIOMMUOps { * @devfn: device and function number */ AddressSpace * (*get_address_space)(PCIBus *bus, void *opaque, int devf= n); + + /** + * @set_host_iova_ranges: convey the usable iova ranges for a given de= vice + * + * Optional callback which returns 0 on success or an error value if a= ny + * should be called after @get_address_space() + * + * @bus: the #PCIBus being accessed. + * @opaque: the data passed to pci_setup_iommu(). + * @devfn: device and function number + * @iova_ranges: list of IOVA ranges usable by the device + * @errp: error handle + */ + int (*set_host_iova_ranges)(PCIBus *bus, void *opaque, int devfn, + GList *iova_ranges, Error **errp); } PCIIOMMUOps; =20 AddressSpace *pci_device_iommu_address_space(PCIDevice *dev); --=20 2.41.0