diff options
| -rw-r--r-- | hw/vfio/container-base.c | 12 | ||||
| -rw-r--r-- | include/hw/vfio/vfio-container-base.h | 1 |
2 files changed, 12 insertions, 1 deletions
diff --git a/hw/vfio/container-base.c b/hw/vfio/container-base.c index 6f86c37d97..749a3fd29d 100644 --- a/hw/vfio/container-base.c +++ b/hw/vfio/container-base.c @@ -64,13 +64,23 @@ int vfio_container_set_dirty_page_tracking(VFIOContainerBase *bcontainer, bool start, Error **errp) { VFIOIOMMUClass *vioc = VFIO_IOMMU_GET_CLASS(bcontainer); + int ret; if (!bcontainer->dirty_pages_supported) { return 0; } g_assert(vioc->set_dirty_page_tracking); - return vioc->set_dirty_page_tracking(bcontainer, start, errp); + if (bcontainer->dirty_pages_started == start) { + return 0; + } + + ret = vioc->set_dirty_page_tracking(bcontainer, start, errp); + if (!ret) { + bcontainer->dirty_pages_started = start; + } + + return ret; } int vfio_container_query_dirty_bitmap(const VFIOContainerBase *bcontainer, diff --git a/include/hw/vfio/vfio-container-base.h b/include/hw/vfio/vfio-container-base.h index 62a8b60d87..4cff9943ab 100644 --- a/include/hw/vfio/vfio-container-base.h +++ b/include/hw/vfio/vfio-container-base.h @@ -44,6 +44,7 @@ typedef struct VFIOContainerBase { unsigned long pgsizes; unsigned int dma_max_mappings; bool dirty_pages_supported; + bool dirty_pages_started; /* Protected by BQL */ QLIST_HEAD(, VFIOGuestIOMMU) giommu_list; QLIST_HEAD(, VFIORamDiscardListener) vrdl_list; QLIST_ENTRY(VFIOContainerBase) next; |