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| author | Eugenio Pérez <eperezma@redhat.com> | 2023-12-15 18:28:19 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2023-12-26 04:51:07 -0500 |
| commit | bc865bfe2d54ac56daa20a6395abff68fab6a5d6 (patch) | |
| tree | 316acc7f74980ecfbb67d00ca6dc081a14861a73 | |
| parent | 410cefbd5c3682432229f5905aa43358785d2ae0 (diff) | |
| download | qemu-bc865bfe2d54ac56daa20a6395abff68fab6a5d6.zip qemu-bc865bfe2d54ac56daa20a6395abff68fab6a5d6.tar.gz qemu-bc865bfe2d54ac56daa20a6395abff68fab6a5d6.tar.bz2 | |
vdpa: do not set virtio status bits if unneeded
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>
Message-Id: <20231215172830.2540987-2-eperezma@redhat.com>
| -rw-r--r-- | hw/virtio/vhost-vdpa.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c index 819b2d8..401dfa9 100644 --- a/hw/virtio/vhost-vdpa.c +++ b/hw/virtio/vhost-vdpa.c @@ -511,6 +511,10 @@ 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; |