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[RFC PATCH 14/18] vdpa: do not set virtio status bits if unneeded
From: |
Eugenio Pérez |
Subject: |
[RFC PATCH 14/18] vdpa: do not set virtio status bits if unneeded |
Date: |
Thu, 19 Oct 2023 16:34:51 +0200 |
Next commits will set DRIVER and ACKNOWLEDGE flags repeatedly in the
case of a migration destination. Let's save ioctls with this.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
hw/virtio/vhost-vdpa.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index 7500c2fc82..cc252fc2d8 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -510,6 +510,10 @@ static int vhost_vdpa_add_status(struct vhost_dev *dev,
uint8_t status)
if (ret < 0) {
return ret;
}
+ if ((s & status) == status) {
+ /* Don't set bits already set */
+ return 0;
+ }
s |= status;
--
2.39.3
- [RFC PATCH 02/18] vdpa: move iova tree to the shared struct, (continued)
- [RFC PATCH 02/18] vdpa: move iova tree to the shared struct, Eugenio Pérez, 2023/10/19
- [RFC PATCH 03/18] vdpa: move iova_range to vhost_vdpa_shared, Eugenio Pérez, 2023/10/19
- [RFC PATCH 05/18] vdpa: use vdpa shared for tracing, Eugenio Pérez, 2023/10/19
- [RFC PATCH 07/18] vdpa: move iotlb_batch_begin_sent to vhost_vdpa_shared, Eugenio Pérez, 2023/10/19
- [RFC PATCH 06/18] vdpa: move file descriptor to vhost_vdpa_shared, Eugenio Pérez, 2023/10/19
- [RFC PATCH 09/18] vdpa: remove msg type of vhost_vdpa, Eugenio Pérez, 2023/10/19
- [RFC PATCH 10/18] vdpa: move iommu_list to vhost_vdpa_shared, Eugenio Pérez, 2023/10/19
- [RFC PATCH 11/18] vdpa: use VhostVDPAShared in vdpa_dma_map and unmap, Eugenio Pérez, 2023/10/19
- [RFC PATCH 08/18] vdpa: move backend_cap to vhost_vdpa_shared, Eugenio Pérez, 2023/10/19
- [RFC PATCH 13/18] vdpa: move memory listener to vhost_vdpa_shared, Eugenio Pérez, 2023/10/19
- [RFC PATCH 14/18] vdpa: do not set virtio status bits if unneeded,
Eugenio Pérez <=
- [RFC PATCH 16/18] vdpa: add vhost_vdpa_net_load_setup NetClient callback, Eugenio Pérez, 2023/10/19
- [RFC PATCH 15/18] vdpa: add vhost_vdpa_load_setup, Eugenio Pérez, 2023/10/19
- [RFC PATCH 12/18] vdpa: use dev_shared in vdpa_iommu, Eugenio Pérez, 2023/10/19
- [RFC PATCH 17/18] vdpa: use shadow_data instead of first device v->shadow_vqs_enabled, Eugenio Pérez, 2023/10/19
- [RFC PATCH 18/18] virtio_net: register incremental migration handlers, Eugenio Pérez, 2023/10/19