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memory: Add IOMMUTLBEvent

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This way we can tell between regular IOMMUTLBEntry (entry of IOMMU
hardware) and notifications.

In the notifications, we set explicitly if it is a MAPs or an UNMAP,
instead of trusting in entry permissions to differentiate them.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20201116165506.31315-3-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Eugenio Pérez 2020-11-16 17:55:03 +01:00 • committed by Michael S. Tsirkin
parent 3b5ebf8532
commit 5039caf3c4
9 changed files with 143 additions and 122 deletions
Download patch file Download diff file Expand all files Collapse all files

30
hw/virtio/virtio-iommu.c
View file

@ -129,7 +129,7 @@ static void virtio_iommu_notify_map(IOMMUMemoryRegion *mr, hwaddr virt_start,
hwaddr virt_end, hwaddr paddr,
uint32_t flags)
{
IOMMUTLBEntry entry;
IOMMUTLBEvent event;
IOMMUAccessFlags perm = IOMMU_ACCESS_FLAG(flags & VIRTIO_IOMMU_MAP_F_READ,
flags & VIRTIO_IOMMU_MAP_F_WRITE);
@ -141,19 +141,20 @@ static void virtio_iommu_notify_map(IOMMUMemoryRegion *mr, hwaddr virt_start,
trace_virtio_iommu_notify_map(mr->parent_obj.name, virt_start, virt_end,
paddr, perm);
entry.target_as = &address_space_memory;
entry.addr_mask = virt_end - virt_start;
entry.iova = virt_start;
entry.perm = perm;
entry.translated_addr = paddr;
event.type = IOMMU_NOTIFIER_MAP;
event.entry.target_as = &address_space_memory;
event.entry.addr_mask = virt_end - virt_start;
event.entry.iova = virt_start;
event.entry.perm = perm;
event.entry.translated_addr = paddr;
memory_region_notify_iommu(mr, 0, entry);
memory_region_notify_iommu(mr, 0, event);
}
static void virtio_iommu_notify_unmap(IOMMUMemoryRegion *mr, hwaddr virt_start,
hwaddr virt_end)
{
IOMMUTLBEntry entry;
IOMMUTLBEvent event;
if (!(mr->iommu_notify_flags & IOMMU_NOTIFIER_UNMAP)) {
return;
@ -161,13 +162,14 @@ static void virtio_iommu_notify_unmap(IOMMUMemoryRegion *mr, hwaddr virt_start,
trace_virtio_iommu_notify_unmap(mr->parent_obj.name, virt_start, virt_end);
entry.target_as = &address_space_memory;
entry.addr_mask = virt_end - virt_start;
entry.iova = virt_start;
entry.perm = IOMMU_NONE;
entry.translated_addr = 0;
event.type = IOMMU_NOTIFIER_UNMAP;
event.entry.target_as = &address_space_memory;
event.entry.addr_mask = virt_end - virt_start;
event.entry.iova = virt_start;
event.entry.perm = IOMMU_NONE;
event.entry.translated_addr = 0;
memory_region_notify_iommu(mr, 0, entry);
memory_region_notify_iommu(mr, 0, event);
}
static gboolean virtio_iommu_notify_unmap_cb(gpointer key, gpointer value,