From: Alex Williamson <alex.williamson@redhat.com>
To: Kirti Wankhede <kwankhede@nvidia.com>
Cc: cohuck@redhat.com, cjia@nvidia.com, aik@ozlabs.ru,
Zhengxiao.zx@Alibaba-inc.com, shuangtai.tst@alibaba-inc.com,
qemu-devel@nongnu.org, peterx@redhat.com, eauger@redhat.com,
yi.l.liu@intel.com, quintela@redhat.com, ziye.yang@intel.com,
armbru@redhat.com, mlevitsk@redhat.com, pasic@linux.ibm.com,
felipe@nutanix.com, zhi.a.wang@intel.com, kevin.tian@intel.com,
yan.y.zhao@intel.com, dgilbert@redhat.com,
changpeng.liu@intel.com, eskultet@redhat.com, Ken.Xue@amd.com,
jonathan.davies@nutanix.com, pbonzini@redhat.com
Subject: Re: [PATCH v26 06/17] vfio: Add migration state change notifier
Date: Fri, 25 Sep 2020 14:20:32 -0600 [thread overview]
Message-ID: <20200925142032.524c1a79@x1.home> (raw)
In-Reply-To: <1600817059-26721-7-git-send-email-kwankhede@nvidia.com>
On Wed, 23 Sep 2020 04:54:08 +0530
Kirti Wankhede <kwankhede@nvidia.com> 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 <kwankhede@nvidia.com>
> Reviewed-by: Neo Jia <cjia@nvidia.com>
> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> ---
> hw/vfio/migration.c | 29 +++++++++++++++++++++++++++++
> hw/vfio/trace-events | 5 +++--
> include/hw/vfio/vfio-common.h | 1 +
> 3 files changed, 33 insertions(+), 2 deletions(-)
>
> diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c
> index a30d628ba963..f650fe9fc3c8 100644
> --- a/hw/vfio/migration.c
> +++ b/hw/vfio/migration.c
> @@ -199,6 +199,28 @@ 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,
> + MigrationStatus_str(s->state));
> +
> + switch (s->state) {
> + case MIGRATION_STATUS_CANCELLING:
> + case MIGRATION_STATUS_CANCELLED:
> + case MIGRATION_STATUS_FAILED:
> + ret = vfio_migration_set_state(vbasedev,
> + ~(VFIO_DEVICE_STATE_SAVING | VFIO_DEVICE_STATE_RESUMING),
> + VFIO_DEVICE_STATE_RUNNING);
> + if (ret) {
> + error_report("%s: Failed to set state RUNNING", vbasedev->name);
> + }
Here again the caller assumes success means the device has entered the
desired state, but as implemented it only means the device is in some
non-error state.
> + }
> +}
> +
> static int vfio_migration_init(VFIODevice *vbasedev,
> struct vfio_region_info *info)
> {
> @@ -221,6 +243,8 @@ 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 ret;
> }
>
> @@ -263,6 +287,11 @@ add_blocker:
>
> void vfio_migration_finalize(VFIODevice *vbasedev)
> {
> +
> + 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 6524734bf7b4..bcb3fa7314d7 100644
> --- a/hw/vfio/trace-events
> +++ b/hw/vfio/trace-events
> @@ -149,5 +149,6 @@ vfio_display_edid_write_error(void) ""
>
> # migration.c
> vfio_migration_probe(const 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_set_state(const char *name, uint32_t state) " (%s) state %d"
> +vfio_vmstate_change(const char *name, int running, const char *reason, uint32_t dev_state) " (%s) running %d reason %s device state %d"
> +vfio_migration_state_notifier(const char *name, const char *state) " (%s) state %s"
> diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
> index 25e3b1a3b90a..49c7c7a0e29a 100644
> --- a/include/hw/vfio/vfio-common.h
> +++ b/include/hw/vfio/vfio-common.h
> @@ -123,6 +123,7 @@ typedef struct VFIODevice {
> VMChangeStateEntry *vm_state;
> uint32_t device_state;
> int vm_running;
> + Notifier migration_state;
Can this live in VFIOMigration? Thanks,
Alex
> } VFIODevice;
>
> struct VFIODeviceOps {
next prev parent reply other threads:[~2020-09-25 21:56 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-22 23:24 [PATCH QEMU v25 00/17] Add migration support for VFIO devices Kirti Wankhede
2020-09-22 23:24 ` [PATCH v26 01/17] vfio: Add function to unmap VFIO region Kirti Wankhede
2020-09-22 23:24 ` [PATCH v26 02/17] vfio: Add vfio_get_object callback to VFIODeviceOps Kirti Wankhede
2020-09-22 23:24 ` [PATCH v26 03/17] vfio: Add save and load functions for VFIO PCI devices Kirti Wankhede
2020-09-23 6:38 ` Zenghui Yu
2020-09-24 22:49 ` Alex Williamson
2020-10-21 9:30 ` Zenghui Yu
2020-10-21 19:03 ` Alex Williamson
2020-09-22 23:24 ` [PATCH v26 04/17] vfio: Add migration region initialization and finalize function Kirti Wankhede
2020-09-24 14:08 ` Cornelia Huck
2020-10-17 20:14 ` Kirti Wankhede
2020-09-25 20:20 ` Alex Williamson
2020-09-28 9:39 ` Cornelia Huck
2020-10-17 20:17 ` Kirti Wankhede
2020-09-22 23:24 ` [PATCH v26 05/17] vfio: Add VM state change handler to know state of VM Kirti Wankhede
2020-09-24 15:02 ` Cornelia Huck
2020-09-29 11:03 ` Dr. David Alan Gilbert
2020-10-17 20:24 ` Kirti Wankhede
2020-10-20 10:51 ` Cornelia Huck
2020-10-21 5:33 ` Kirti Wankhede
2020-10-22 7:51 ` Cornelia Huck
2020-10-22 15:42 ` Kirti Wankhede
2020-10-22 15:49 ` Cornelia Huck
2020-09-25 20:20 ` Alex Williamson
2020-10-17 20:30 ` Kirti Wankhede
2020-10-17 23:44 ` Alex Williamson
2020-10-18 17:43 ` Kirti Wankhede
2020-10-19 17:51 ` Alex Williamson
2020-10-20 10:23 ` Cornelia Huck
2020-09-22 23:24 ` [PATCH v26 06/17] vfio: Add migration state change notifier Kirti Wankhede
2020-09-25 20:20 ` Alex Williamson [this message]
2020-10-17 20:35 ` Kirti Wankhede
2020-10-19 17:57 ` Alex Williamson
2020-10-20 10:55 ` Cornelia Huck
2020-09-22 23:24 ` [PATCH v26 07/17] vfio: Register SaveVMHandlers for VFIO device Kirti Wankhede
2020-09-24 15:15 ` Philippe Mathieu-Daudé
2020-09-29 10:19 ` Dr. David Alan Gilbert
2020-10-17 20:36 ` Kirti Wankhede
2020-09-25 11:53 ` Cornelia Huck
2020-10-18 20:55 ` Kirti Wankhede
2020-10-20 15:51 ` Cornelia Huck
2020-09-25 20:20 ` Alex Williamson
2020-10-18 17:40 ` Kirti Wankhede
2020-09-22 23:24 ` [PATCH v26 08/17] vfio: Add save state functions to SaveVMHandlers Kirti Wankhede
2020-09-23 11:42 ` Wang, Zhi A
2020-10-21 14:30 ` Kirti Wankhede
2020-09-25 21:02 ` Alex Williamson
2020-10-18 18:00 ` Kirti Wankhede
2020-09-22 23:24 ` [PATCH v26 09/17] vfio: Add load " Kirti Wankhede
2020-10-01 10:07 ` Cornelia Huck
2020-10-18 20:47 ` Kirti Wankhede
2020-10-20 16:25 ` Cornelia Huck
2020-09-22 23:24 ` [PATCH v26 10/17] memory: Set DIRTY_MEMORY_MIGRATION when IOMMU is enabled Kirti Wankhede
2020-09-22 23:24 ` [PATCH v26 11/17] vfio: Get migration capability flags for container Kirti Wankhede
2020-09-22 23:24 ` [PATCH v26 12/17] vfio: Add function to start and stop dirty pages tracking Kirti Wankhede
2020-09-25 21:55 ` Alex Williamson
2020-10-18 20:52 ` Kirti Wankhede
2020-09-22 23:24 ` [PATCH v26 13/17] vfio: create mapped iova list when vIOMMU is enabled Kirti Wankhede
2020-09-25 22:23 ` Alex Williamson
2020-10-19 6:01 ` Kirti Wankhede
2020-10-19 17:24 ` Alex Williamson
2020-10-19 19:15 ` Kirti Wankhede
2020-10-19 20:07 ` Alex Williamson
2020-09-22 23:24 ` [PATCH v26 14/17] vfio: Add vfio_listener_log_sync to mark dirty pages Kirti Wankhede
2020-09-22 23:24 ` [PATCH v26 15/17] vfio: Add ioctl to get dirty pages bitmap during dma unmap Kirti Wankhede
2020-09-22 23:24 ` [PATCH v26 16/17] vfio: Make vfio-pci device migration capable Kirti Wankhede
2020-09-25 12:17 ` Cornelia Huck
2020-09-22 23:24 ` [PATCH v26 17/17] qapi: Add VFIO devices migration stats in Migration stats Kirti Wankhede
2020-09-24 15:14 ` Eric Blake
2020-09-25 22:55 ` Alex Williamson
2020-09-29 10:40 ` Dr. David Alan Gilbert
2020-09-23 7:06 ` [PATCH QEMU v25 00/17] Add migration support for VFIO devices Zenghui Yu
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