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| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2016-06-30 13:00:23 -0600 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2016-06-30 13:00:23 -0600 |
| commit | d22d8956b185c002b50a4d0883aff61f857347ef (patch) | |
| tree | 25764240d91bdafe36b0b98d1b5250b09e4e7e79 /include/exec/memory.h | |
| parent | e37dac06dc4e85a2f46c24261c0dfdf2a30b50e3 (diff) | |
| download | focaccia-qemu-d22d8956b185c002b50a4d0883aff61f857347ef.tar.gz focaccia-qemu-d22d8956b185c002b50a4d0883aff61f857347ef.zip | |
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 <aik@ozlabs.ru> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Peter Xu <peterx@redhat.com> Tested-by: Peter Xu <peterx@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> [new log & extracted from [PATCH qemu v17 12/12] spapr_iommu, vfio, memory: Notify IOMMU about starting/stopping listening] Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Diffstat (limited to 'include/exec/memory.h')
| -rw-r--r-- | include/exec/memory.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index e3829f797a..23c7399131 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -153,6 +153,10 @@ struct MemoryRegionIOMMUOps { IOMMUTLBEntry (*translate)(MemoryRegion *iommu, hwaddr addr, bool is_write); /* Returns minimum supported page size */ uint64_t (*get_min_page_size)(MemoryRegion *iommu); + /* Called when the first notifier is set */ + void (*notify_started)(MemoryRegion *iommu); + /* Called when the last notifier is removed */ + void (*notify_stopped)(MemoryRegion *iommu); }; typedef struct CoalescedMemoryRange CoalescedMemoryRange; @@ -622,9 +626,11 @@ void memory_region_iommu_replay(MemoryRegion *mr, Notifier *n, bool is_write); * memory_region_unregister_iommu_notifier: unregister a notifier for * changes to IOMMU translation entries. * + * @mr: the memory region which was observed and for which notity_stopped() + * needs to be called * @n: the notifier to be removed. */ -void memory_region_unregister_iommu_notifier(Notifier *n); +void memory_region_unregister_iommu_notifier(MemoryRegion *mr, Notifier *n); /** * memory_region_name: get a memory region's name |