diff options
Diffstat (limited to 'include/exec/memory.h')
| -rw-r--r-- | include/exec/memory.h | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index 6e67043ee0..e499dc215b 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -288,10 +288,16 @@ typedef struct IOMMUMemoryRegionClass { * @iommu: the IOMMUMemoryRegion * @old_flags: events which previously needed to be notified * @new_flags: events which now need to be notified + * + * Returns 0 on success, or a negative errno; in particular + * returns -EINVAL if the new flag bitmap is not supported by the + * IOMMU memory region. In case of failure, the error object + * must be created */ - void (*notify_flag_changed)(IOMMUMemoryRegion *iommu, - IOMMUNotifierFlag old_flags, - IOMMUNotifierFlag new_flags); + int (*notify_flag_changed)(IOMMUMemoryRegion *iommu, + IOMMUNotifierFlag old_flags, + IOMMUNotifierFlag new_flags, + Error **errp); /* Called to handle memory_region_iommu_replay(). * * The default implementation of memory_region_iommu_replay() is to @@ -1079,13 +1085,18 @@ void memory_region_notify_one(IOMMUNotifier *notifier, * memory_region_register_iommu_notifier: register a notifier for changes to * IOMMU translation entries. * + * Returns 0 on success, or a negative errno otherwise. In particular, + * -EINVAL indicates that at least one of the attributes of the notifier + * is not supported (flag/range) by the IOMMU memory region. In case of error + * the error object must be created. + * * @mr: the memory region to observe * @n: the IOMMUNotifier to be added; the notify callback receives a * pointer to an #IOMMUTLBEntry as the opaque value; the pointer * ceases to be valid on exit from the notifier. */ -void memory_region_register_iommu_notifier(MemoryRegion *mr, - IOMMUNotifier *n); +int memory_region_register_iommu_notifier(MemoryRegion *mr, + IOMMUNotifier *n, Error **errp); /** * memory_region_iommu_replay: replay existing IOMMU translations to |