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vfio/common: Allow disabling device dirty page tracking 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
hw/vfio/common.c
View File

@ -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;
}

4
hw/vfio/migration.c
View File

@ -1036,7 +1036,9 @@ bool vfio_migration_realize(VFIODevice *vbasedev, Error **errp)
return !vfio_block_migration(vbasedev, err, errp);
}
if (!vbasedev->dirty_pages_supported && !vbasedev->iommu_dirty_tracking) {
if ((!vbasedev->dirty_pages_supported ||
vbasedev->device_dirty_page_tracking == ON_OFF_AUTO_OFF) &&
!vbasedev->iommu_dirty_tracking) {
if (vbasedev->enable_migration == ON_OFF_AUTO_AUTO) {
error_setg(&err,
"%s: VFIO device doesn't support device and "

3
hw/vfio/pci.c
View File

@ -3361,6 +3361,9 @@ static Property vfio_pci_dev_properties[] = {
DEFINE_PROP_ON_OFF_AUTO("x-pre-copy-dirty-page-tracking", VFIOPCIDevice,
vbasedev.pre_copy_dirty_page_tracking,
ON_OFF_AUTO_ON),
DEFINE_PROP_ON_OFF_AUTO("x-device-dirty-page-tracking", VFIOPCIDevice,
vbasedev.device_dirty_page_tracking,
ON_OFF_AUTO_ON),
DEFINE_PROP_ON_OFF_AUTO("display", VFIOPCIDevice,
display, ON_OFF_AUTO_OFF),
DEFINE_PROP_UINT32("xres", VFIOPCIDevice, display_xres, 0),

1
include/hw/vfio/vfio-common.h
View File

@ -138,6 +138,7 @@ typedef struct VFIODevice {
VFIOMigration *migration;
Error *migration_blocker;
OnOffAuto pre_copy_dirty_page_tracking;
OnOffAuto device_dirty_page_tracking;
bool dirty_pages_supported;
bool dirty_tracking;
bool iommu_dirty_tracking;