From d22d8956b185c002b50a4d0883aff61f857347ef Mon Sep 17 00:00:00 2001 From: Alexey Kardashevskiy Date: Thu, 30 Jun 2016 13:00:23 -0600 Subject: memory: Add MemoryRegionIOMMUOps.notify_started/stopped callbacks The IOMMU driver may change behavior depending on whether a notifier client is present. In the case of POWER, this represents a change in the visibility of the IOTLB, for other drivers such as intel-iommu and future AMD-Vi emulation, notifier support is not yet enabled and this provides the opportunity to flag that incompatibility. Signed-off-by: Alexey Kardashevskiy Reviewed-by: David Gibson Reviewed-by: Peter Xu Tested-by: Peter Xu Acked-by: Paolo Bonzini [new log & extracted from [PATCH qemu v17 12/12] spapr_iommu, vfio, memory: Notify IOMMU about starting/stopping listening] Signed-off-by: Alex Williamson --- memory.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'memory.c') diff --git a/memory.c b/memory.c index 8549c791d7..33799e810b 100644 --- a/memory.c +++ b/memory.c @@ -1499,6 +1499,10 @@ bool memory_region_is_logging(MemoryRegion *mr, uint8_t client) void memory_region_register_iommu_notifier(MemoryRegion *mr, Notifier *n) { + if (mr->iommu_ops->notify_started && + QLIST_EMPTY(&mr->iommu_notify.notifiers)) { + mr->iommu_ops->notify_started(mr); + } notifier_list_add(&mr->iommu_notify, n); } @@ -1532,9 +1536,13 @@ void memory_region_iommu_replay(MemoryRegion *mr, Notifier *n, bool is_write) } } -void memory_region_unregister_iommu_notifier(Notifier *n) +void memory_region_unregister_iommu_notifier(MemoryRegion *mr, Notifier *n) { notifier_remove(n); + if (mr->iommu_ops->notify_stopped && + QLIST_EMPTY(&mr->iommu_notify.notifiers)) { + mr->iommu_ops->notify_stopped(mr); + } } void memory_region_notify_iommu(MemoryRegion *mr, -- cgit v1.2.3