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vfio/common: Allow disabling device dirty page tracking

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The property 'x-pre-copy-dirty-page-tracking' allows disabling the whole
tracking of VF pre-copy phase of dirty page tracking, though it means
that it will only be used at the start of the switchover phase.

Add an option that disables the VF dirty page tracking, and fall
back into container-based dirty page tracking. This also allows to
use IOMMU dirty tracking even on VFs with their own dirty
tracker scheme.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Reviewed-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
This commit is contained in:
Joao Martins 2024-07-22 22:13:26 +01:00 • committed by Cédric Le Goater
parent f48b472450
commit 30b9167785
4 changed files with 10 additions and 1 deletions
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3
hw/vfio/common.c
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@ -199,6 +199,9 @@ bool vfio_devices_all_device_dirty_tracking(const VFIOContainerBase *bcontainer)
VFIODevice *vbasedev;
QLIST_FOREACH(vbasedev, &bcontainer->device_list, container_next) {
if (vbasedev->device_dirty_page_tracking == ON_OFF_AUTO_OFF) {
return false;
}
if (!vbasedev->dirty_pages_supported) {
return false;
}