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vfio: Change default dirty pages tracking behavior during migration

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By default dirty pages tracking is enabled during iterative phase
(pre-copy phase).
Added per device opt-out option 'x-pre-copy-dirty-page-tracking' to
disable dirty pages tracking during iterative phase. If the option
'x-pre-copy-dirty-page-tracking=off' is set for any VFIO device, dirty
pages tracking during iterative phase will be disabled.

Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Kirti Wankhede 2020-11-23 19:53:19 +05:30 • committed by Alex Williamson
parent cf254988a5
commit bb0990d174
3 changed files with 11 additions and 4 deletions
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include/hw/vfio/vfio-common.h
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@ -130,6 +130,7 @@ typedef struct VFIODevice {
unsigned int flags;
VFIOMigration *migration;
Error *migration_blocker;
OnOffAuto pre_copy_dirty_page_tracking;
} VFIODevice;
struct VFIODeviceOps {