86 lines
2.7 KiB
Diff
86 lines
2.7 KiB
Diff
From 98c74a827b742807f979fc36bca99ba0db38d295 Mon Sep 17 00:00:00 2001
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From: fangyi <eric.fangyi@huawei.com>
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Date: Mon, 4 Dec 2023 15:22:20 +0800
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Subject: [PATCH] vhost: implement vhost-vdpa suspend/resume
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vhost-vdpa implements the vhost_dev_suspend interface,
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which will be called during the shutdown phase of the
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live migration source virtual machine to suspend the
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device but not reset the device information.
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vhost-vdpa implements the vhost_dev_resume interface.
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If the live migration fails, it will be called during
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the startup phase of the source virtual machine.
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Enable the device but set the status, etc.
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Signed-off-by: libai <libai12@huawei.com>
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Signed-off-by: jiangdongxu <jiangdongxu1@huawei.com>
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Signed-off-by: fangyi <eric.fangyi@huawei.com>
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---
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hw/virtio/vhost-vdpa.c | 44 ++++++++++++++++++++++++++++++++++++++++--
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1 file changed, 42 insertions(+), 2 deletions(-)
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diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
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index 7663d78b43..7688dc0eba 100644
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--- a/hw/virtio/vhost-vdpa.c
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+++ b/hw/virtio/vhost-vdpa.c
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@@ -1318,6 +1318,43 @@ static unsigned int vhost_vdpa_get_used_memslots(void)
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return vhost_vdpa_used_memslots;
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}
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+static int vhost_vdpa_suspend_device(struct vhost_dev *dev)
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+{
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+ struct vhost_vdpa *v = dev->opaque;
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+ int ret;
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+
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+ vhost_vdpa_svqs_stop(dev);
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+ vhost_vdpa_host_notifiers_uninit(dev, dev->nvqs);
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+
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+ if (dev->vq_index + dev->nvqs != dev->vq_index_end) {
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+ return 0;
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+ }
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+
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+ ret = vhost_vdpa_call(dev, VHOST_VDPA_SUSPEND, NULL);
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+ memory_listener_unregister(&v->listener);
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+ return ret;
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+}
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+
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+static int vhost_vdpa_resume_device(struct vhost_dev *dev)
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+{
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+ struct vhost_vdpa *v = dev->opaque;
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+ bool ok;
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+
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+ vhost_vdpa_host_notifiers_init(dev);
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+ ok = vhost_vdpa_svqs_start(dev);
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+ if (unlikely(!ok)) {
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+ return -1;
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+ }
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+ vhost_vdpa_set_vring_ready(dev);
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+
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+ if (dev->vq_index + dev->nvqs != dev->vq_index_end) {
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+ return 0;
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+ }
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+
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+ memory_listener_register(&v->listener, &address_space_memory);
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+ return vhost_vdpa_call(dev, VHOST_VDPA_RESUME, NULL);
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+}
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+
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static int vhost_vdpa_log_sync(struct vhost_dev *dev)
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{
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struct vhost_vdpa *v = dev->opaque;
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@@ -1364,6 +1401,9 @@ const VhostOps vdpa_ops = {
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.vhost_force_iommu = vhost_vdpa_force_iommu,
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.vhost_log_sync = vhost_vdpa_log_sync,
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.vhost_set_config_call = vhost_vdpa_set_config_call,
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- .vhost_set_used_memslots = vhost_vdpa_set_used_memslots,
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- .vhost_get_used_memslots = vhost_vdpa_get_used_memslots,
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+ .vhost_set_used_memslots = vhost_vdpa_set_used_memslots,
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+ .vhost_get_used_memslots = vhost_vdpa_get_used_memslots,
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+ .vhost_dev_suspend = vhost_vdpa_suspend_device,
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+ .vhost_dev_resume = vhost_vdpa_resume_device,
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+
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};
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--
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2.27.0
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