motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-04 00:03:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

memory: Add MemoryRegionIOMMUOps.notify_started/stopped callbacks

Browse source 
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>
This commit is contained in:
Alexey Kardashevskiy 2016-06-30 13:00:23 -06:00 • committed by Alex Williamson
parent e37dac06dc
commit d22d8956b1
3 changed files with 19 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

8
include/exec/memory.h
View file

@ -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