This patch shows how sva notifier is registered. And provided
an example by registering notify func for tlb flush propagation.
Signed-off-by: Liu, Yi L <yi.l....@linux.intel.com>
---
hw/vfio/pci.c | 55 +++++++++++++++++++++++++++++++++++++++++++++++++++++--
1 file changed, 53 insertions(+), 2 deletions(-)
diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
index a60a4d7..b7297cc 100644
--- a/hw/vfio/pci.c
+++ b/hw/vfio/pci.c
@@ -2775,6 +2775,26 @@ static void vfio_unregister_req_notifier(VFIOPCIDevice
*vdev)
vdev->req_enabled = false;
}
+static VFIOContainer *vfio_get_container_from_busdev(PCIBus *bus,
+ int32_t devfn)
+{
+ VFIOGroup *group;
+ VFIOPCIDevice *vdev_iter;
+ VFIODevice *vbasedev_iter;
+ PCIDevice *pdev_iter;
+
+ QLIST_FOREACH(group, &vfio_group_list, next) {
+ QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
+ vdev_iter = container_of(vbasedev_iter, VFIOPCIDevice, vbasedev);
+ pdev_iter = &vdev_iter->pdev;
+ if (pci_get_bus(pdev_iter) == bus && pdev_iter->devfn == devfn) {
+ return group->container;
+ }
+ }
+ }
+ return NULL;
+}
+
static void vfio_pci_device_sva_bind_pasid_table(PCIBus *bus,
int32_t devfn, uint64_t pasidt_addr, uint32_t size)
{
@@ -2783,11 +2803,42 @@ static void vfio_pci_device_sva_bind_pasid_table(PCIBus
*bus,
So far, Intel VT-d and AMD IOMMU requires it. */
}
+static void vfio_iommu_sva_tlb_invalidate_notify(IOMMUSVANotifier *n,
+ IOMMUSVAEventData *event_data)
+{
+/* Sample code, would be detailed in coming virt-SVA patchset.
+ VFIOGuestIOMMUSVAContext *gsva_ctx;
+ IOMMUSVAContext *sva_ctx;
+ VFIOContainer *container;
+
+ gsva_ctx = container_of(n, VFIOGuestIOMMUSVAContext, n);
+ container = gsva_ctx->container;
+
+ TODO: forward to host through VFIO IOCTL
+*/
+}
+
static void vfio_pci_device_sva_register_notifier(PCIBus *bus,
int32_t devfn, IOMMUSVAContext *sva_ctx)
{
- /* Register notifier for TLB invalidation propagation
- */
+ VFIOContainer *container = vfio_get_container_from_busdev(bus, devfn);
+
+ if (container != NULL) {
+ VFIOGuestIOMMUSVAContext *gsva_ctx;
+ gsva_ctx = g_malloc0(sizeof(*gsva_ctx));
+ gsva_ctx->sva_ctx = sva_ctx;
+ gsva_ctx->container = container;
+ QLIST_INSERT_HEAD(&container->gsva_ctx_list,
+ gsva_ctx,
+ gsva_ctx_next);
+ /* Register vfio_iommu_sva_tlb_invalidate_notify with event flag
+ IOMMU_SVA_EVENT_TLB_INV */
+ iommu_sva_notifier_register(sva_ctx,
+ &gsva_ctx->n,
+ vfio_iommu_sva_tlb_invalidate_notify,
+ IOMMU_SVA_EVENT_TLB_INV);
+ return;
+ }
}
static void vfio_pci_device_sva_unregister_notifier(PCIBus *bus,
--
1.9.1
