[RFC v1 14/18] hw/pci: add flush_pasid_iotlb() in PCIPASIDOps

[Liu Yi L <yi.l.liu@xxxxxxxxx>]

This patch adds flush_pasid_iotlb() in PCIPASIDOps for passing guest
PASID-based iotlb flush operation to host via vfio interface.

Cc: Kevin Tian <kevin.tian@xxxxxxxxx>
Cc: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
Cc: Peter Xu <peterx@xxxxxxxxxx>
Cc: Eric Auger <eric.auger@xxxxxxxxxx>
Cc: Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx>
Cc: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Liu Yi L <yi.l.liu@xxxxxxxxx>
---
 hw/pci/pci.c         | 15 +++++++++++++++
 include/hw/pci/pci.h |  4 ++++
 2 files changed, 19 insertions(+)

diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 2229229..cf92bed 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -2706,6 +2706,21 @@ void pci_device_unbind_gpasid(PCIBus *bus, int32_t devfn,
     }
 }
 
+void pci_device_flush_pasid_iotlb(PCIBus *bus, int32_t devfn,
+                            struct iommu_cache_invalidate_info *info)
+{
+    PCIDevice *dev;
+
+    if (!bus) {
+        return;
+    }
+
+    dev = bus->devices[devfn];
+    if (dev && dev->pasid_ops) {
+        dev->pasid_ops->flush_pasid_iotlb(bus, devfn, info);
+    }
+}
+
 static void pci_dev_get_w64(PCIBus *b, PCIDevice *dev, void *opaque)
 {
     Range *range = opaque;
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index 8d849e6..77e6bb1 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -272,6 +272,8 @@ struct PCIPASIDOps {
                             struct gpasid_bind_data *g_bind_data);
     void (*unbind_gpasid)(PCIBus *bus, int32_t devfn,
                             struct gpasid_bind_data *g_bind_data);
+    void (*flush_pasid_iotlb)(PCIBus *bus, int32_t devfn,
+                            struct iommu_cache_invalidate_info *info);
 };
 
 struct PCIDevice {
@@ -506,6 +508,8 @@ void pci_device_bind_gpasid(PCIBus *bus, int32_t devfn,
                             struct gpasid_bind_data *g_bind_data);
 void pci_device_unbind_gpasid(PCIBus *bus, int32_t devfn,
                             struct gpasid_bind_data *g_bind_data);
+void pci_device_flush_pasid_iotlb(PCIBus *bus, int32_t devfn,
+                            struct iommu_cache_invalidate_info *info);
 
 static inline void
 pci_set_byte(uint8_t *config, uint8_t val)
-- 
2.7.4