mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

memory: Add iommu map/unmap notifiers

Browse Source 
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
include/exec/memory.h
View File

@ -25,6 +25,7 @@
#include "exec/iorange.h"
#include "exec/ioport.h"
#include "qemu/int128.h"
#include "qemu/notify.h"
#define MAX_PHYS_ADDR_SPACE_BITS 62
#define MAX_PHYS_ADDR (((hwaddr)1 << MAX_PHYS_ADDR_SPACE_BITS) - 1)
@ -173,6 +174,7 @@ struct MemoryRegion {
uint8_t dirty_log_mask;
unsigned ioeventfd_nb;
MemoryRegionIoeventfd *ioeventfds;
NotifierList iommu_notify;
};
struct MemoryRegionPortio {
@ -423,6 +425,36 @@ static inline bool memory_region_is_romd(MemoryRegion *mr)
*/
bool memory_region_is_iommu(MemoryRegion *mr);
/**
* memory_region_notify_iommu: notify a change in an IOMMU translation entry.
*
* @mr: the memory region that was changed
* @entry: the new entry in the IOMMU translation table. The entry
* replaces all old entries for the same virtual I/O address range.
* Deleted entries have .@perm == 0.
*/
void memory_region_notify_iommu(MemoryRegion *mr,
IOMMUTLBEntry entry);
/**
* memory_region_register_iommu_notifier: register a notifier for changes to
* IOMMU translation entries.
*
* @mr: the memory region to observe
* @n: the notifier to be added; the notifier 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, Notifier *n);
/**
* memory_region_unregister_iommu_notifier: unregister a notifier for
* changes to IOMMU translation entries.
*
* @n: the notifier to be removed.
*/
void memory_region_unregister_iommu_notifier(Notifier *n);
/**
* memory_region_name: get a memory region's name
*

18
memory.c
View File

@ -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;