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[Qemu-arm] [PATCH RFC v5 3/5] virtio-iommu: Call iommu notifier on attac
From: |
Bharat Bhushan |
Subject: |
[Qemu-arm] [PATCH RFC v5 3/5] virtio-iommu: Call iommu notifier on attach/detach |
Date: |
Tue, 27 Nov 2018 06:52:54 +0000 |
This patch extend the ATTACH/DETACH command handling to
call iommu-notifier to map/unmap the memory region in IOMMU
using vfio. This replay existing address space mappings on
attach command and remove existing address space mappings
on detach command.
Signed-off-by: Bharat Bhushan <address@hidden>
Signed-off-by: Eric Auger <address@hidden>
---
v4->v5:
- Rebase to v9 version from Eric
- PCIe device hotplug fix
hw/virtio/virtio-iommu.c | 47 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index 613a77521d..7e8149e719 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -131,8 +131,44 @@ static void virtio_iommu_notify_unmap(IOMMUMemoryRegion
*mr, hwaddr iova,
memory_region_notify_iommu(mr, 0, entry);
}
+static gboolean virtio_iommu_mapping_unmap(gpointer key, gpointer value,
+ gpointer data)
+{
+ viommu_mapping *mapping = (viommu_mapping *) value;
+ IOMMUMemoryRegion *mr = (IOMMUMemoryRegion *) data;
+
+ virtio_iommu_notify_unmap(mr, mapping->virt_addr, mapping->size);
+
+ return false;
+}
+
+static gboolean virtio_iommu_mapping_map(gpointer key, gpointer value,
+ gpointer data)
+{
+ viommu_mapping *mapping = (viommu_mapping *) value;
+ IOMMUMemoryRegion *mr = (IOMMUMemoryRegion *) data;
+
+ virtio_iommu_notify_map(mr, mapping->virt_addr, mapping->phys_addr,
+ mapping->size);
+
+ return false;
+}
+
static void virtio_iommu_detach_endpoint_from_domain(viommu_endpoint *ep)
{
+ VirtioIOMMUNotifierNode *node;
+ VirtIOIOMMU *s = ep->viommu;
+ viommu_domain *domain = ep->domain;
+ uint32_t sid;
+
+ QLIST_FOREACH(node, &s->notifiers_list, next) {
+ sid = virtio_iommu_get_sid(node->iommu_dev);
+ if (ep->id == sid) {
+ g_tree_foreach(domain->mappings, virtio_iommu_mapping_unmap,
+ &node->iommu_dev->iommu_mr);
+ }
+ }
+
QLIST_REMOVE(ep, next);
ep->domain = NULL;
}
@@ -280,8 +316,10 @@ static int virtio_iommu_attach(VirtIOIOMMU *s,
{
uint32_t domain_id = le32_to_cpu(req->domain);
uint32_t ep_id = le32_to_cpu(req->endpoint);
+ VirtioIOMMUNotifierNode *node;
viommu_domain *domain;
viommu_endpoint *ep;
+ uint32_t sid;
trace_virtio_iommu_attach(domain_id, ep_id);
@@ -300,6 +338,15 @@ static int virtio_iommu_attach(VirtIOIOMMU *s,
ep->domain = domain;
g_tree_ref(domain->mappings);
+ /* replay existing address space mappings on the associated mr */
+ QLIST_FOREACH(node, &s->notifiers_list, next) {
+ sid = virtio_iommu_get_sid(node->iommu_dev);
+ if (ep->id == sid) {
+ g_tree_foreach(domain->mappings, virtio_iommu_mapping_map,
+ &node->iommu_dev->iommu_mr);
+ }
+ }
+
return VIRTIO_IOMMU_S_OK;
}
--
2.19.1