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VFIO update 2020-11-23

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* Enable pre-copy dirty page tracking by default (Kirti Wankhede)
 
  * Mark migration as experimental (Alex Williamson)
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Merge remote-tracking branch 'remotes/awilliam/tags/vfio-update-20201123.0' into staging

VFIO update 2020-11-23

 * Enable pre-copy dirty page tracking by default (Kirti Wankhede)

 * Mark migration as experimental (Alex Williamson)

# gpg: Signature made Mon 23 Nov 2020 17:10:58 GMT
# gpg:                using RSA key 239B9B6E3BB08B22
# gpg: Good signature from "Alex Williamson <alex.williamson@redhat.com>" [full]
# gpg:                 aka "Alex Williamson <alex@shazbot.org>" [full]
# gpg:                 aka "Alex Williamson <alwillia@redhat.com>" [full]
# gpg:                 aka "Alex Williamson <alex.l.williamson@gmail.com>" [full]
# Primary key fingerprint: 42F6 C04E 540B D1A9 9E7B  8A90 239B 9B6E 3BB0 8B22

* remotes/awilliam/tags/vfio-update-20201123.0:
  vfio: Change default dirty pages tracking behavior during migration
  vfio: Make migration support experimental

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2020-11-23 18:51:13 +00:00
parent fb764373ea bb0990d174
commit 23895cbd82
4 changed files with 15 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
hw/vfio/common.c
View file

@ -311,7 +311,7 @@ bool vfio_mig_active(void)
return true;
}
static bool vfio_devices_all_stopped_and_saving(VFIOContainer *container)
static bool vfio_devices_all_saving(VFIOContainer *container)
{
VFIOGroup *group;
VFIODevice *vbasedev;
@ -329,8 +329,11 @@ static bool vfio_devices_all_stopped_and_saving(VFIOContainer *container)
return false;
}
if ((migration->device_state & VFIO_DEVICE_STATE_SAVING) &&
!(migration->device_state & VFIO_DEVICE_STATE_RUNNING)) {
if (migration->device_state & VFIO_DEVICE_STATE_SAVING) {
if ((vbasedev->pre_copy_dirty_page_tracking == ON_OFF_AUTO_OFF)
&& (migration->device_state & VFIO_DEVICE_STATE_RUNNING)) {
return false;
}
continue;
} else {
return false;
@ -1125,7 +1128,7 @@ static void vfio_listerner_log_sync(MemoryListener *listener,
return;
}
if (vfio_devices_all_stopped_and_saving(container)) {
if (vfio_devices_all_saving(container)) {
vfio_sync_dirty_bitmap(container, section);
}
}

2
hw/vfio/migration.c
View file

@ -882,7 +882,7 @@ int vfio_migration_probe(VFIODevice *vbasedev, Error **errp)
Error *local_err = NULL;
int ret = -ENOTSUP;
if (!container->dirty_pages_supported) {
if (!vbasedev->enable_migration || !container->dirty_pages_supported) {
goto add_blocker;
}

5
hw/vfio/pci.c
View file

@ -3182,6 +3182,9 @@ static void vfio_instance_init(Object *obj)
static Property vfio_pci_dev_properties[] = {
DEFINE_PROP_PCI_HOST_DEVADDR("host", VFIOPCIDevice, host),
DEFINE_PROP_STRING("sysfsdev", VFIOPCIDevice, vbasedev.sysfsdev),
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("display", VFIOPCIDevice,
display, ON_OFF_AUTO_OFF),
DEFINE_PROP_UINT32("xres", VFIOPCIDevice, display_xres, 0),
@ -3194,6 +3197,8 @@ static Property vfio_pci_dev_properties[] = {
VFIO_FEATURE_ENABLE_REQ_BIT, true),
DEFINE_PROP_BIT("x-igd-opregion", VFIOPCIDevice, features,
VFIO_FEATURE_ENABLE_IGD_OPREGION_BIT, false),
DEFINE_PROP_BOOL("x-enable-migration", VFIOPCIDevice,
vbasedev.enable_migration, false),
DEFINE_PROP_BOOL("x-no-mmap", VFIOPCIDevice, vbasedev.no_mmap, false),
DEFINE_PROP_BOOL("x-balloon-allowed", VFIOPCIDevice,
vbasedev.ram_block_discard_allowed, false),

2
include/hw/vfio/vfio-common.h
View file

@ -123,12 +123,14 @@ typedef struct VFIODevice {
bool needs_reset;
bool no_mmap;
bool ram_block_discard_allowed;
bool enable_migration;
VFIODeviceOps *ops;
unsigned int num_irqs;
unsigned int num_regions;
unsigned int flags;
VFIOMigration *migration;
Error *migration_blocker;
OnOffAuto pre_copy_dirty_page_tracking;
} VFIODevice;
struct VFIODeviceOps {