From 36e84d0c17102fa1c887d8c650a13ec08fca0ec0 Mon Sep 17 00:00:00 2001 From: Zhenzhong Duan Date: Tue, 21 Nov 2023 16:44:04 +0800 Subject: [PATCH] vfio/iommufd: Relax assert check for iommufd backend MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Currently iommufd doesn't support dirty page sync yet, but it will not block us doing live migration if VFIO migration is force enabled. So in this case we allow set_dirty_page_tracking to be NULL. Note we don't need same change for query_dirty_bitmap because when dirty page sync isn't supported, query_dirty_bitmap will never be called. Suggested-by: Cédric Le Goater Signed-off-by: Zhenzhong Duan Reviewed-by: Cédric Le Goater Reviewed-by: Eric Auger Tested-by: Eric Auger Tested-by: Nicolin Chen Signed-off-by: Cédric Le Goater --- hw/vfio/container-base.c | 4 ++++ hw/vfio/container.c | 4 ---- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/hw/vfio/container-base.c b/hw/vfio/container-base.c index 71f7274973..eee2dcfe76 100644 --- a/hw/vfio/container-base.c +++ b/hw/vfio/container-base.c @@ -55,6 +55,10 @@ void vfio_container_del_section_window(VFIOContainerBase *bcontainer, int vfio_container_set_dirty_page_tracking(VFIOContainerBase *bcontainer, bool start) { + if (!bcontainer->dirty_pages_supported) { + return 0; + } + g_assert(bcontainer->ops->set_dirty_page_tracking); return bcontainer->ops->set_dirty_page_tracking(bcontainer, start); } diff --git a/hw/vfio/container.c b/hw/vfio/container.c index 6bacf38222..ed2d721b2b 100644 --- a/hw/vfio/container.c +++ b/hw/vfio/container.c @@ -216,10 +216,6 @@ static int vfio_legacy_set_dirty_page_tracking(VFIOContainerBase *bcontainer, .argsz = sizeof(dirty), }; - if (!bcontainer->dirty_pages_supported) { - return 0; - } - if (start) { dirty.flags = VFIO_IOMMU_DIRTY_PAGES_FLAG_START; } else {