[ats_vtd,v5,10/22] pci: add IOMMU operations to get address spaces and memory regions with PASID

Commit Message

CLEMENT MATHIEU--DRIF June 3, 2024, 5:59 a.m. UTC

From: Clément Mathieu--Drif <[e-mail]>

Signed-off-by: Clément Mathieu--Drif <[e-mail]>
---
 hw/pci/pci.c         | 19 +++++++++++++++++++
 include/hw/pci/pci.h | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 53 insertions(+)

Patch

diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 51feede3cf..3fe47d4002 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -2747,6 +2747,25 @@  AddressSpace *pci_device_iommu_address_space(PCIDevice *dev)
     return &address_space_memory;
 }
 
+AddressSpace *pci_device_iommu_address_space_pasid(PCIDevice *dev,
+                                                   uint32_t pasid)
+{
+    PCIBus *bus;
+    PCIBus *iommu_bus;
+    int devfn;
+
+    if (!dev->is_master || !pcie_pasid_enabled(dev) || pasid == PCI_NO_PASID) {
+        return NULL;
+    }
+
+    pci_device_get_iommu_bus_devfn(dev, &bus, &iommu_bus, &devfn);
+    if (iommu_bus && iommu_bus->iommu_ops->get_address_space_pasid) {
+        return iommu_bus->iommu_ops->get_address_space_pasid(bus,
+                                    iommu_bus->iommu_opaque, devfn, pasid);
+    }
+    return NULL;
+}
+
 bool pci_device_set_iommu_device(PCIDevice *dev, HostIOMMUDevice *hiod,
                                  Error **errp)
 {
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index c84cc9b99a..6c60f7a7c5 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -385,6 +385,38 @@  typedef struct PCIIOMMUOps {
      * @devfn: device and function number
      */
     AddressSpace * (*get_address_space)(PCIBus *bus, void *opaque, int devfn);
+    /**
+     * @get_address_space_pasid: same as get_address_space but returns an
+     * address space with the requested PASID
+     *
+     * This callback is required for PASID-based operations
+     *
+     * @bus: the #PCIBus being accessed.
+     *
+     * @opaque: the data passed to pci_setup_iommu().
+     *
+     * @devfn: device and function number
+     *
+     * @pasid: the pasid associated with the requested memory region
+     */
+    AddressSpace * (*get_address_space_pasid)(PCIBus *bus, void *opaque,
+                                              int devfn, uint32_t pasid);
+    /**
+     * @get_memory_region_pasid: get the iommu memory region for a given
+     * device and pasid
+     *
+     * @bus: the #PCIBus being accessed.
+     *
+     * @opaque: the data passed to pci_setup_iommu().
+     *
+     * @devfn: device and function number
+     *
+     * @pasid: the pasid associated with the requested memory region
+     */
+    IOMMUMemoryRegion * (*get_memory_region_pasid)(PCIBus *bus,
+                                                   void *opaque,
+                                                   int devfn,
+                                                   uint32_t pasid);
     /**
      * @set_iommu_device: attach a HostIOMMUDevice to a vIOMMU
      *
@@ -420,6 +452,8 @@  typedef struct PCIIOMMUOps {
 } PCIIOMMUOps;
 
 AddressSpace *pci_device_iommu_address_space(PCIDevice *dev);
+AddressSpace *pci_device_iommu_address_space_pasid(PCIDevice *dev,
+                                                   uint32_t pasid);
 bool pci_device_set_iommu_device(PCIDevice *dev, HostIOMMUDevice *hiod,
                                  Error **errp);
 void pci_device_unset_iommu_device(PCIDevice *dev);