From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
To: Kirti Wankhede <kwankhede@nvidia.com>
Cc: Zhengxiao.zx@alibaba-inc.com, kevin.tian@intel.com,
yi.l.liu@intel.com, cjia@nvidia.com, eskultet@redhat.com,
ziye.yang@intel.com, cohuck@redhat.com,
shuangtai.tst@alibaba-inc.com, qemu-devel@nongnu.org,
zhi.a.wang@intel.com, mlevitsk@redhat.com, pasic@linux.ibm.com,
aik@ozlabs.ru, alex.williamson@redhat.com, eauger@redhat.com,
felipe@nutanix.com, jonathan.davies@nutanix.com,
yan.y.zhao@intel.com, changpeng.liu@intel.com, Ken.Xue@amd.com
Subject: Re: [PATCH v16 QEMU 05/16] vfio: Add migration region initialization and finalize function
Date: Thu, 26 Mar 2020 17:52:02 +0000 [thread overview]
Message-ID: <20200326175202.GH2713@work-vm> (raw)
In-Reply-To: <1585084154-29461-6-git-send-email-kwankhede@nvidia.com>
* Kirti Wankhede (kwankhede@nvidia.com) wrote:
> - Migration functions are implemented for VFIO_DEVICE_TYPE_PCI device in this
> patch series.
> - VFIO device supports migration or not is decided based of migration region
> query. If migration region query is successful and migration region
> initialization is successful then migration is supported else migration is
> blocked.
>
> Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
> Reviewed-by: Neo Jia <cjia@nvidia.com>
> ---
> hw/vfio/Makefile.objs | 2 +-
> hw/vfio/migration.c | 138 ++++++++++++++++++++++++++++++++++++++++++
> hw/vfio/trace-events | 3 +
> include/hw/vfio/vfio-common.h | 9 +++
> 4 files changed, 151 insertions(+), 1 deletion(-)
> create mode 100644 hw/vfio/migration.c
>
> diff --git a/hw/vfio/Makefile.objs b/hw/vfio/Makefile.objs
> index 9bb1c09e8477..8b296c889ed9 100644
> --- a/hw/vfio/Makefile.objs
> +++ b/hw/vfio/Makefile.objs
> @@ -1,4 +1,4 @@
> -obj-y += common.o spapr.o
> +obj-y += common.o spapr.o migration.o
> obj-$(CONFIG_VFIO_PCI) += pci.o pci-quirks.o display.o
> obj-$(CONFIG_VFIO_CCW) += ccw.o
> obj-$(CONFIG_VFIO_PLATFORM) += platform.o
> diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c
> new file mode 100644
> index 000000000000..a078dcf1dd8f
> --- /dev/null
> +++ b/hw/vfio/migration.c
> @@ -0,0 +1,138 @@
> +/*
> + * Migration support for VFIO devices
> + *
> + * Copyright NVIDIA, Inc. 2019
Time flies by...
> + *
> + * This work is licensed under the terms of the GNU GPL, version 2. See
> + * the COPYING file in the top-level directory.
Are you sure you want this to be V2 only? Most code added to qemu now is
v2 or later.
> + */
> +
> +#include "qemu/osdep.h"
> +#include <linux/vfio.h>
> +
> +#include "hw/vfio/vfio-common.h"
> +#include "cpu.h"
> +#include "migration/migration.h"
> +#include "migration/qemu-file.h"
> +#include "migration/register.h"
> +#include "migration/blocker.h"
> +#include "migration/misc.h"
> +#include "qapi/error.h"
> +#include "exec/ramlist.h"
> +#include "exec/ram_addr.h"
> +#include "pci.h"
> +#include "trace.h"
> +
> +static void vfio_migration_region_exit(VFIODevice *vbasedev)
> +{
> + VFIOMigration *migration = vbasedev->migration;
> +
> + if (!migration) {
> + return;
> + }
> +
> + if (migration->region.size) {
> + vfio_region_exit(&migration->region);
> + vfio_region_finalize(&migration->region);
> + }
> +}
> +
> +static int vfio_migration_region_init(VFIODevice *vbasedev, int index)
> +{
> + VFIOMigration *migration = vbasedev->migration;
> + Object *obj = NULL;
> + int ret = -EINVAL;
> +
> + if (!vbasedev->ops->vfio_get_object) {
> + return ret;
> + }
> +
> + obj = vbasedev->ops->vfio_get_object(vbasedev);
> + if (!obj) {
> + return ret;
> + }
> +
> + ret = vfio_region_setup(obj, vbasedev, &migration->region, index,
> + "migration");
> + if (ret) {
> + error_report("%s: Failed to setup VFIO migration region %d: %s",
> + vbasedev->name, index, strerror(-ret));
> + goto err;
> + }
> +
> + if (!migration->region.size) {
> + ret = -EINVAL;
> + error_report("%s: Invalid region size of VFIO migration region %d: %s",
> + vbasedev->name, index, strerror(-ret));
> + goto err;
> + }
> +
> + return 0;
> +
> +err:
> + vfio_migration_region_exit(vbasedev);
> + return ret;
> +}
> +
> +static int vfio_migration_init(VFIODevice *vbasedev,
> + struct vfio_region_info *info)
> +{
> + int ret;
> +
> + vbasedev->migration = g_new0(VFIOMigration, 1);
> +
> + ret = vfio_migration_region_init(vbasedev, info->index);
> + if (ret) {
> + error_report("%s: Failed to initialise migration region",
> + vbasedev->name);
> + g_free(vbasedev->migration);
> + vbasedev->migration = NULL;
> + return ret;
> + }
> +
> + return 0;
> +}
> +
> +/* ---------------------------------------------------------------------- */
> +
> +int vfio_migration_probe(VFIODevice *vbasedev, Error **errp)
> +{
> + struct vfio_region_info *info;
> + Error *local_err = NULL;
> + int ret;
> +
> + ret = vfio_get_dev_region_info(vbasedev, VFIO_REGION_TYPE_MIGRATION,
> + VFIO_REGION_SUBTYPE_MIGRATION, &info);
> + if (ret) {
> + goto add_blocker;
> + }
> +
> + ret = vfio_migration_init(vbasedev, info);
> + if (ret) {
> + goto add_blocker;
> + }
> +
> + trace_vfio_migration_probe(vbasedev->name, info->index);
> + return 0;
> +
> +add_blocker:
> + error_setg(&vbasedev->migration_blocker,
> + "VFIO device doesn't support migration");
> + ret = migrate_add_blocker(vbasedev->migration_blocker, &local_err);
> + if (local_err) {
> + error_propagate(errp, local_err);
> + error_free(vbasedev->migration_blocker);
> + }
> + return ret;
> +}
> +
> +void vfio_migration_finalize(VFIODevice *vbasedev)
> +{
> + if (vbasedev->migration_blocker) {
> + migrate_del_blocker(vbasedev->migration_blocker);
> + error_free(vbasedev->migration_blocker);
> + }
> +
> + vfio_migration_region_exit(vbasedev);
> + g_free(vbasedev->migration);
> +}
> diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events
> index 8cdc27946cb8..191a726a1312 100644
> --- a/hw/vfio/trace-events
> +++ b/hw/vfio/trace-events
> @@ -143,3 +143,6 @@ vfio_display_edid_link_up(void) ""
> vfio_display_edid_link_down(void) ""
> vfio_display_edid_update(uint32_t prefx, uint32_t prefy) "%ux%u"
> vfio_display_edid_write_error(void) ""
> +
> +# migration.c
> +vfio_migration_probe(char *name, uint32_t index) " (%s) Region %d"
> diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
> index d69a7f3ae31e..d4b268641173 100644
> --- a/include/hw/vfio/vfio-common.h
> +++ b/include/hw/vfio/vfio-common.h
> @@ -57,6 +57,10 @@ typedef struct VFIORegion {
> uint8_t nr; /* cache the region number for debug */
> } VFIORegion;
>
> +typedef struct VFIOMigration {
> + VFIORegion region;
> +} VFIOMigration;
> +
> typedef struct VFIOAddressSpace {
> AddressSpace *as;
> QLIST_HEAD(, VFIOContainer) containers;
> @@ -113,6 +117,8 @@ typedef struct VFIODevice {
> unsigned int num_irqs;
> unsigned int num_regions;
> unsigned int flags;
> + VFIOMigration *migration;
> + Error *migration_blocker;
> } VFIODevice;
>
> struct VFIODeviceOps {
> @@ -204,4 +210,7 @@ int vfio_spapr_create_window(VFIOContainer *container,
> int vfio_spapr_remove_window(VFIOContainer *container,
> hwaddr offset_within_address_space);
>
> +int vfio_migration_probe(VFIODevice *vbasedev, Error **errp);
> +void vfio_migration_finalize(VFIODevice *vbasedev);
> +
> #endif /* HW_VFIO_VFIO_COMMON_H */
> --
> 2.7.0
>
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
next prev parent reply other threads:[~2020-03-26 17:53 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-24 21:08 [PATCH v16 QEMU 00/16] Add migration support for VFIO devices Kirti Wankhede
2020-03-24 21:08 ` [PATCH v16 QEMU 01/16] vfio: KABI for migration interface - Kernel header placeholder Kirti Wankhede
2020-03-24 21:09 ` [PATCH v16 QEMU 02/16] vfio: Add function to unmap VFIO region Kirti Wankhede
2020-03-24 21:09 ` [PATCH v16 QEMU 03/16] vfio: Add vfio_get_object callback to VFIODeviceOps Kirti Wankhede
2020-03-24 21:09 ` [PATCH v16 QEMU 04/16] vfio: Add save and load functions for VFIO PCI devices Kirti Wankhede
2020-03-25 19:56 ` Alex Williamson
2020-03-26 17:29 ` Dr. David Alan Gilbert
2020-03-26 17:38 ` Alex Williamson
2020-05-04 23:18 ` Kirti Wankhede
2020-05-05 4:37 ` Alex Williamson
2020-05-06 6:11 ` Yan Zhao
2020-05-06 19:48 ` Kirti Wankhede
2020-05-06 20:03 ` Alex Williamson
2020-05-07 5:40 ` Kirti Wankhede
2020-05-07 18:14 ` Alex Williamson
2020-03-26 17:46 ` Dr. David Alan Gilbert
2020-05-04 23:19 ` Kirti Wankhede
2020-04-07 4:10 ` Longpeng (Mike, Cloud Infrastructure Service Product Dept.)
2020-05-04 23:21 ` Kirti Wankhede
2020-03-24 21:09 ` [PATCH v16 QEMU 05/16] vfio: Add migration region initialization and finalize function Kirti Wankhede
2020-03-26 17:52 ` Dr. David Alan Gilbert [this message]
2020-05-04 23:19 ` Kirti Wankhede
2020-05-19 19:32 ` Dr. David Alan Gilbert
2020-03-24 21:09 ` [PATCH v16 QEMU 06/16] vfio: Add VM state change handler to know state of VM Kirti Wankhede
2020-03-24 21:09 ` [PATCH v16 QEMU 07/16] vfio: Add migration state change notifier Kirti Wankhede
2020-04-01 11:27 ` Dr. David Alan Gilbert
2020-05-04 23:20 ` Kirti Wankhede
2020-03-24 21:09 ` [PATCH v16 QEMU 08/16] vfio: Register SaveVMHandlers for VFIO device Kirti Wankhede
2020-03-25 21:02 ` Alex Williamson
2020-05-04 23:19 ` Kirti Wankhede
2020-05-05 4:37 ` Alex Williamson
2020-05-06 6:38 ` Yan Zhao
2020-05-06 9:58 ` Cornelia Huck
2020-05-06 16:53 ` Dr. David Alan Gilbert
2020-05-06 19:30 ` Kirti Wankhede
2020-05-07 6:37 ` Cornelia Huck
2020-05-07 20:29 ` Alex Williamson
2020-04-01 17:36 ` Dr. David Alan Gilbert
2020-05-04 23:20 ` Kirti Wankhede
2020-03-24 21:09 ` [PATCH v16 QEMU 09/16] vfio: Add save state functions to SaveVMHandlers Kirti Wankhede
2020-03-25 22:03 ` Alex Williamson
2020-05-04 23:18 ` Kirti Wankhede
2020-05-05 4:37 ` Alex Williamson
2020-05-11 9:53 ` Kirti Wankhede
2020-05-11 15:59 ` Alex Williamson
2020-05-12 2:06 ` Yan Zhao
2020-05-09 5:31 ` Yan Zhao
2020-05-11 10:22 ` Kirti Wankhede
2020-05-12 0:50 ` Yan Zhao
2020-03-24 21:09 ` [PATCH v16 QEMU 10/16] vfio: Add load " Kirti Wankhede
2020-03-25 22:36 ` Alex Williamson
2020-04-01 18:58 ` Dr. David Alan Gilbert
2020-05-04 23:20 ` Kirti Wankhede
2020-03-24 21:09 ` [PATCH v16 QEMU 11/16] iommu: add callback to get address limit IOMMU supports Kirti Wankhede
2020-03-24 21:09 ` [PATCH v16 QEMU 12/16] memory: Set DIRTY_MEMORY_MIGRATION when IOMMU is enabled Kirti Wankhede
2020-04-01 19:00 ` Dr. David Alan Gilbert
2020-04-01 19:42 ` Alex Williamson
2020-03-24 21:09 ` [PATCH v16 QEMU 13/16] vfio: Add function to start and stop dirty pages tracking Kirti Wankhede
2020-03-26 19:10 ` Alex Williamson
2020-05-04 23:20 ` Kirti Wankhede
2020-04-01 19:03 ` Dr. David Alan Gilbert
2020-05-04 23:21 ` Kirti Wankhede
2020-03-24 21:09 ` [PATCH v16 QEMU 14/16] vfio: Add vfio_listener_log_sync to mark dirty pages Kirti Wankhede
2020-03-25 2:19 ` Yan Zhao
2020-03-26 19:46 ` Alex Williamson
2020-04-01 19:08 ` Dr. David Alan Gilbert
2020-04-01 5:50 ` Yan Zhao
2020-04-03 20:11 ` Kirti Wankhede
2020-03-24 21:09 ` [PATCH v16 QEMU 15/16] vfio: Add ioctl to get dirty pages bitmap during dma unmap Kirti Wankhede
2020-03-24 21:09 ` [PATCH v16 QEMU 16/16] vfio: Make vfio-pci device migration capable Kirti Wankhede
2020-03-24 23:36 ` [PATCH v16 QEMU 00/16] Add migration support for VFIO devices no-reply
2020-03-31 18:34 ` Alex Williamson
2020-04-01 6:41 ` Yan Zhao
2020-04-01 18:34 ` Alex Williamson
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