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X-Received-From: 134.134.136.20 Subject: Re: [Qemu-devel] [PATCH v7 07/13] vfio: Add migration state change notifier X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Yan Zhao Cc: "Zhengxiao.zx@Alibaba-inc.com" , "Tian, Kevin" , "Liu, Yi L" , "cjia@nvidia.com" , "eskultet@redhat.com" , "Yang, Ziye" , "qemu-devel@nongnu.org" , "cohuck@redhat.com" , "shuangtai.tst@alibaba-inc.com" , "dgilbert@redhat.com" , "Wang, Zhi A" , "mlevitsk@redhat.com" , "pasic@linux.ibm.com" , "aik@ozlabs.ru" , "alex.williamson@redhat.com" , "eauger@redhat.com" , "felipe@nutanix.com" , "jonathan.davies@nutanix.com" , "Liu, Changpeng" , "Ken.Xue@amd.com" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Jul 09, 2019 at 05:49:14PM +0800, Kirti Wankhede wrote: > Added migration state change notifier to get notification on migration state > change. These states are translated to VFIO device state and conveyed to vendor > driver. > > Signed-off-by: Kirti Wankhede > Reviewed-by: Neo Jia > --- > hw/vfio/migration.c | 54 +++++++++++++++++++++++++++++++++++++++++++ > hw/vfio/trace-events | 1 + > include/hw/vfio/vfio-common.h | 1 + > 3 files changed, 56 insertions(+) > > diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c > index c01f08b659d0..e4a89a6f9bc7 100644 > --- a/hw/vfio/migration.c > +++ b/hw/vfio/migration.c > @@ -132,6 +132,53 @@ static void vfio_vmstate_change(void *opaque, int running, RunState state) > } > } > > +static void vfio_migration_state_notifier(Notifier *notifier, void *data) > +{ > + MigrationState *s = data; > + VFIODevice *vbasedev = container_of(notifier, VFIODevice, migration_state); > + int ret; > + > + trace_vfio_migration_state_notifier(vbasedev->name, s->state); > + > + switch (s->state) { > + case MIGRATION_STATUS_ACTIVE: > + if (vbasedev->device_state & VFIO_DEVICE_STATE_RUNNING) { > + if (vbasedev->vm_running) { > + ret = vfio_migration_set_state(vbasedev, > + VFIO_DEVICE_STATE_RUNNING | VFIO_DEVICE_STATE_SAVING); > + if (ret) { > + error_report("%s: Failed to set state RUNNING and SAVING", > + vbasedev->name); > + } > + } else { > + ret = vfio_migration_set_state(vbasedev, > + VFIO_DEVICE_STATE_SAVING); > + if (ret) { > + error_report("%s: Failed to set state STOP and SAVING", > + vbasedev->name); > + } > + } > + } else { > + ret = vfio_migration_set_state(vbasedev, > + VFIO_DEVICE_STATE_RESUMING); > + if (ret) { > + error_report("%s: Failed to set state RESUMING", > + vbasedev->name); > + } > + } > + return; > + hi Kirti currently, migration state notifiers are only notified in below 3 interfaces: migrate_fd_connect, migrate_fd_cleanup, postcopy_start, where MIGRATION_STATUS_ACTIVE is not an valid state. Have you tested the above code? what's the purpose of the code? Thanks Yan > + case MIGRATION_STATUS_CANCELLING: > + case MIGRATION_STATUS_CANCELLED: > + case MIGRATION_STATUS_FAILED: > + ret = vfio_migration_set_state(vbasedev, VFIO_DEVICE_STATE_RUNNING); > + if (ret) { > + error_report("%s: Failed to set state RUNNING", vbasedev->name); > + } > + return; > + } > +} > + > static int vfio_migration_init(VFIODevice *vbasedev, > struct vfio_region_info *info) > { > @@ -152,6 +199,9 @@ static int vfio_migration_init(VFIODevice *vbasedev, > vbasedev->vm_state = qemu_add_vm_change_state_handler(vfio_vmstate_change, > vbasedev); > > + vbasedev->migration_state.notify = vfio_migration_state_notifier; > + add_migration_state_change_notifier(&vbasedev->migration_state); > + > return 0; > } > > @@ -194,6 +244,10 @@ void vfio_migration_finalize(VFIODevice *vbasedev) > return; > } > > + if (vbasedev->migration_state.notify) { > + remove_migration_state_change_notifier(&vbasedev->migration_state); > + } > + > if (vbasedev->vm_state) { > qemu_del_vm_change_state_handler(vbasedev->vm_state); > } > diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events > index 3d15bacd031a..69503228f20e 100644 > --- a/hw/vfio/trace-events > +++ b/hw/vfio/trace-events > @@ -148,3 +148,4 @@ vfio_display_edid_write_error(void) "" > vfio_migration_probe(char *name, uint32_t index) " (%s) Region %d" > vfio_migration_set_state(char *name, uint32_t state) " (%s) state %d" > vfio_vmstate_change(char *name, int running, const char *reason, uint32_t dev_state) " (%s) running %d reason %s device state %d" > +vfio_migration_state_notifier(char *name, int state) " (%s) state %d" > diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h > index f6c70db3a9c1..a022484d2636 100644 > --- a/include/hw/vfio/vfio-common.h > +++ b/include/hw/vfio/vfio-common.h > @@ -128,6 +128,7 @@ typedef struct VFIODevice { > uint32_t device_state; > VMChangeStateEntry *vm_state; > int vm_running; > + Notifier migration_state; > } VFIODevice; > > struct VFIODeviceOps { > -- > 2.7.0 >