diff options
| author | Zhenzhong Duan <zhenzhong.duan@intel.com> | 2023-02-15 14:52:38 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2023-03-02 19:13:52 -0500 |
| commit | 6da24341866fa940fd7d575788a2319514941c77 (patch) | |
| tree | dd3853fb464808e5efc93ab351e9b51e881b0078 /softmmu/memory.c | |
| parent | b8a7f51f59e28d5a8e0c07ed3919cc9695560ed2 (diff) | |
| download | qemu-6da24341866fa940fd7d575788a2319514941c77.zip qemu-6da24341866fa940fd7d575788a2319514941c77.tar.gz qemu-6da24341866fa940fd7d575788a2319514941c77.tar.bz2 | |
memory: Optimize replay of guest mapping
On x86, there are two notifiers registered due to vtd-ir memory region
splitting the whole address space. During replay of the address space
for each notifier, the whole address space is scanned which is
unnecessory.
We only need to scan the space belong to notifier montiored space.
Assert when notifier is used to monitor beyond iommu memory region's
address space.
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Message-Id: <20230215065238.713041-1-zhenzhong.duan@intel.com>
Acked-by: Peter Xu <peterx@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'softmmu/memory.c')
| -rw-r--r-- | softmmu/memory.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/softmmu/memory.c b/softmmu/memory.c index 9d64efc..da7d846 100644 --- a/softmmu/memory.c +++ b/softmmu/memory.c @@ -1900,6 +1900,7 @@ int memory_region_register_iommu_notifier(MemoryRegion *mr, iommu_mr = IOMMU_MEMORY_REGION(mr); assert(n->notifier_flags != IOMMU_NOTIFIER_NONE); assert(n->start <= n->end); + assert(n->end <= memory_region_size(mr)); assert(n->iommu_idx >= 0 && n->iommu_idx < memory_region_iommu_num_indexes(iommu_mr)); @@ -1923,7 +1924,6 @@ uint64_t memory_region_iommu_get_min_page_size(IOMMUMemoryRegion *iommu_mr) void memory_region_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n) { - MemoryRegion *mr = MEMORY_REGION(iommu_mr); IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr); hwaddr addr, granularity; IOMMUTLBEntry iotlb; @@ -1936,7 +1936,7 @@ void memory_region_iommu_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n) granularity = memory_region_iommu_get_min_page_size(iommu_mr); - for (addr = 0; addr < memory_region_size(mr); addr += granularity) { + for (addr = n->start; addr < n->end; addr += granularity) { iotlb = imrc->translate(iommu_mr, addr, IOMMU_NONE, n->iommu_idx); if (iotlb.perm != IOMMU_NONE) { n->notify(n, &iotlb); |