From: Kirti Wankhede <kwankhede@nvidia.com>
To: <alex.williamson@redhat.com>, <cjia@nvidia.com>
Cc: Zhengxiao.zx@Alibaba-inc.com, kevin.tian@intel.com,
yi.l.liu@intel.com, yan.y.zhao@intel.com, eskultet@redhat.com,
ziye.yang@intel.com, qemu-devel@nongnu.org, cohuck@redhat.com,
shuangtai.tst@alibaba-inc.com, dgilbert@redhat.com,
zhi.a.wang@intel.com, mlevitsk@redhat.com, pasic@linux.ibm.com,
aik@ozlabs.ru, Kirti Wankhede <kwankhede@nvidia.com>,
eauger@redhat.com, felipe@nutanix.com,
jonathan.davies@nutanix.com, changpeng.liu@intel.com,
Ken.Xue@amd.com
Subject: [PATCH v16 QEMU 10/16] vfio: Add load state functions to SaveVMHandlers
Date: Wed, 25 Mar 2020 02:39:08 +0530 [thread overview]
Message-ID: <1585084154-29461-11-git-send-email-kwankhede@nvidia.com> (raw)
In-Reply-To: <1585084154-29461-1-git-send-email-kwankhede@nvidia.com>
Sequence during _RESUMING device state:
While data for this device is available, repeat below steps:
a. read data_offset from where user application should write data.
b. write data of data_size to migration region from data_offset.
c. write data_size which indicates vendor driver that data is written in
staging buffer.
For user, data is opaque. User should write data in the same order as
received.
Signed-off-by: Kirti Wankhede <kwankhede@nvidia.com>
Reviewed-by: Neo Jia <cjia@nvidia.com>
---
hw/vfio/migration.c | 179 +++++++++++++++++++++++++++++++++++++++++++++++++++
hw/vfio/trace-events | 3 +
2 files changed, 182 insertions(+)
diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c
index ecbeed5182c2..ab295d25620e 100644
--- a/hw/vfio/migration.c
+++ b/hw/vfio/migration.c
@@ -269,6 +269,33 @@ static int vfio_save_device_config_state(QEMUFile *f, void *opaque)
return qemu_file_get_error(f);
}
+static int vfio_load_device_config_state(QEMUFile *f, void *opaque)
+{
+ VFIODevice *vbasedev = opaque;
+ uint64_t data;
+
+ if (vbasedev->ops && vbasedev->ops->vfio_load_config) {
+ int ret;
+
+ ret = vbasedev->ops->vfio_load_config(vbasedev, f);
+ if (ret) {
+ error_report("%s: Failed to load device config space",
+ vbasedev->name);
+ return ret;
+ }
+ }
+
+ data = qemu_get_be64(f);
+ if (data != VFIO_MIG_FLAG_END_OF_STATE) {
+ error_report("%s: Failed loading device config space, "
+ "end flag incorrect 0x%"PRIx64, vbasedev->name, data);
+ return -EINVAL;
+ }
+
+ trace_vfio_load_device_config_state(vbasedev->name);
+ return qemu_file_get_error(f);
+}
+
/* ---------------------------------------------------------------------- */
static int vfio_save_setup(QEMUFile *f, void *opaque)
@@ -434,12 +461,164 @@ static int vfio_save_complete_precopy(QEMUFile *f, void *opaque)
return ret;
}
+static int vfio_load_setup(QEMUFile *f, void *opaque)
+{
+ VFIODevice *vbasedev = opaque;
+ VFIOMigration *migration = vbasedev->migration;
+ int ret = 0;
+
+ if (migration->region.mmaps) {
+ ret = vfio_region_mmap(&migration->region);
+ if (ret) {
+ error_report("%s: Failed to mmap VFIO migration region %d: %s",
+ vbasedev->name, migration->region.nr,
+ strerror(-ret));
+ return ret;
+ }
+ }
+
+ ret = vfio_migration_set_state(vbasedev, ~0, VFIO_DEVICE_STATE_RESUMING);
+ if (ret) {
+ error_report("%s: Failed to set state RESUMING", vbasedev->name);
+ }
+ return ret;
+}
+
+static int vfio_load_cleanup(void *opaque)
+{
+ vfio_save_cleanup(opaque);
+ return 0;
+}
+
+static int vfio_load_state(QEMUFile *f, void *opaque, int version_id)
+{
+ VFIODevice *vbasedev = opaque;
+ VFIOMigration *migration = vbasedev->migration;
+ int ret = 0;
+ uint64_t data, data_size;
+
+ data = qemu_get_be64(f);
+ while (data != VFIO_MIG_FLAG_END_OF_STATE) {
+
+ trace_vfio_load_state(vbasedev->name, data);
+
+ switch (data) {
+ case VFIO_MIG_FLAG_DEV_CONFIG_STATE:
+ {
+ ret = vfio_load_device_config_state(f, opaque);
+ if (ret) {
+ return ret;
+ }
+ break;
+ }
+ case VFIO_MIG_FLAG_DEV_SETUP_STATE:
+ {
+ uint64_t region_size = qemu_get_be64(f);
+
+ if (migration->region.size < region_size) {
+ error_report("%s: SETUP STATE: migration region too small, "
+ "0x%"PRIx64 " < 0x%"PRIx64, vbasedev->name,
+ migration->region.size, region_size);
+ return -EINVAL;
+ }
+
+ data = qemu_get_be64(f);
+ if (data == VFIO_MIG_FLAG_END_OF_STATE) {
+ return ret;
+ } else {
+ error_report("%s: SETUP STATE: EOS not found 0x%"PRIx64,
+ vbasedev->name, data);
+ return -EINVAL;
+ }
+ break;
+ }
+ case VFIO_MIG_FLAG_DEV_DATA_STATE:
+ {
+ VFIORegion *region = &migration->region;
+ void *buf = NULL;
+ bool buffer_mmaped = false;
+ uint64_t data_offset = 0;
+
+ data_size = qemu_get_be64(f);
+ if (data_size == 0) {
+ break;
+ }
+
+ ret = pread(vbasedev->fd, &data_offset, sizeof(data_offset),
+ region->fd_offset +
+ offsetof(struct vfio_device_migration_info,
+ data_offset));
+ if (ret != sizeof(data_offset)) {
+ error_report("%s:Failed to get migration buffer data offset %d",
+ vbasedev->name, ret);
+ return -EINVAL;
+ }
+
+ if (region->mmaps) {
+ buf = find_data_region(region, data_offset, data_size);
+ }
+
+ buffer_mmaped = (buf != NULL) ? true : false;
+
+ if (!buffer_mmaped) {
+ buf = g_try_malloc0(data_size);
+ if (!buf) {
+ error_report("%s: Error allocating buffer ", __func__);
+ return -ENOMEM;
+ }
+ }
+
+ qemu_get_buffer(f, buf, data_size);
+
+ if (!buffer_mmaped) {
+ ret = pwrite(vbasedev->fd, buf, data_size,
+ region->fd_offset + data_offset);
+ g_free(buf);
+
+ if (ret != data_size) {
+ error_report("%s: Failed to set migration buffer %d",
+ vbasedev->name, ret);
+ return -EINVAL;
+ }
+ }
+
+ ret = pwrite(vbasedev->fd, &data_size, sizeof(data_size),
+ region->fd_offset +
+ offsetof(struct vfio_device_migration_info, data_size));
+ if (ret != sizeof(data_size)) {
+ error_report("%s: Failed to set migration buffer data size %d",
+ vbasedev->name, ret);
+ if (!buffer_mmaped) {
+ g_free(buf);
+ }
+ return -EINVAL;
+ }
+
+ trace_vfio_load_state_device_data(vbasedev->name, data_offset,
+ data_size);
+ break;
+ }
+ }
+
+ ret = qemu_file_get_error(f);
+ if (ret) {
+ return ret;
+ }
+ data = qemu_get_be64(f);
+ }
+
+ return ret;
+}
+
static SaveVMHandlers savevm_vfio_handlers = {
.save_setup = vfio_save_setup,
.save_cleanup = vfio_save_cleanup,
.save_live_pending = vfio_save_pending,
.save_live_iterate = vfio_save_iterate,
.save_live_complete_precopy = vfio_save_complete_precopy,
+ .load_setup = vfio_load_setup,
+ .load_cleanup = vfio_load_cleanup,
+ .load_state = vfio_load_state,
};
/* ---------------------------------------------------------------------- */
diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events
index bdf40ba368c7..ac065b559f4e 100644
--- a/hw/vfio/trace-events
+++ b/hw/vfio/trace-events
@@ -157,3 +157,6 @@ vfio_save_device_config_state(char *name) " (%s)"
vfio_save_pending(char *name, uint64_t precopy, uint64_t postcopy, uint64_t compatible) " (%s) precopy 0x%"PRIx64" postcopy 0x%"PRIx64" compatible 0x%"PRIx64
vfio_save_iterate(char *name, int data_size) " (%s) data_size %d"
vfio_save_complete_precopy(char *name) " (%s)"
+vfio_load_device_config_state(char *name) " (%s)"
+vfio_load_state(char *name, uint64_t data) " (%s) data 0x%"PRIx64
+vfio_load_state_device_data(char *name, uint64_t data_offset, uint64_t data_size) " (%s) Offset 0x%"PRIx64" size 0x%"PRIx64
--
2.7.0
next prev parent reply other threads:[~2020-03-24 21:48 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
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 ` Kirti Wankhede [this message]
2020-03-25 22:36 ` [PATCH v16 QEMU 10/16] vfio: Add load " 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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1585084154-29461-11-git-send-email-kwankhede@nvidia.com \
--to=kwankhede@nvidia.com \
--cc=Ken.Xue@amd.com \
--cc=Zhengxiao.zx@Alibaba-inc.com \
--cc=aik@ozlabs.ru \
--cc=alex.williamson@redhat.com \
--cc=changpeng.liu@intel.com \
--cc=cjia@nvidia.com \
--cc=cohuck@redhat.com \
--cc=dgilbert@redhat.com \
--cc=eauger@redhat.com \
--cc=eskultet@redhat.com \
--cc=felipe@nutanix.com \
--cc=jonathan.davies@nutanix.com \
--cc=kevin.tian@intel.com \
--cc=mlevitsk@redhat.com \
--cc=pasic@linux.ibm.com \
--cc=qemu-devel@nongnu.org \
--cc=shuangtai.tst@alibaba-inc.com \
--cc=yan.y.zhao@intel.com \
--cc=yi.l.liu@intel.com \
--cc=zhi.a.wang@intel.com \
--cc=ziye.yang@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).