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memory: Add iommu map/unmap notifiers

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This patch adds a NotifierList to MemoryRegions which represent IOMMUs
allowing other parts of the code to register interest in mappings or
unmappings from the IOMMU.  All IOMMU implementations will need to call
memory_region_notify_iommu() to inform those waiting on the notifier list,
whenever an IOMMU mapping is made or removed.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
David Gibson 2013-05-14 19:13:56 +10:00 • committed by Paolo Bonzini
parent 3095115744
commit 068665757d
2 changed files with 50 additions and 0 deletions
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18
memory.c
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@ -1072,6 +1072,7 @@ void memory_region_init_iommu(MemoryRegion *mr,
memory_region_init(mr, name, size);
mr->iommu_ops = ops,
mr->terminates = true; /* then re-forwards */
notifier_list_init(&mr->iommu_notify);
}
void memory_region_init_reservation(MemoryRegion *mr,
@ -1124,6 +1125,23 @@ bool memory_region_is_iommu(MemoryRegion *mr)
return mr->iommu_ops;
}
void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n)
{
notifier_list_add(&mr->iommu_notify, n);
}
void memory_region_unregister_iommu_notifier(Notifier *n)
{
notifier_remove(n);
}
void memory_region_notify_iommu(MemoryRegion *mr,
IOMMUTLBEntry entry)
{
assert(memory_region_is_iommu(mr));
notifier_list_notify(&mr->iommu_notify, &entry);
}
void memory_region_set_log(MemoryRegion *mr, bool log, unsigned client)
{
uint8_t mask = 1 << client;