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vhost: Track number of descs in SVQDescState

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A guest's buffer continuos on GPA may need multiple descriptors on
qemu's VA, so SVQ should track its length sepparatedly.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Eugenio Pérez 2022-07-20 08:59:35 +02:00 • committed by Jason Wang
parent 9e87868fca
commit ac4cfdc6f3
2 changed files with 8 additions and 2 deletions
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6
hw/virtio/vhost-shadow-virtqueue.h
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@ -17,6 +17,12 @@
typedef struct SVQDescState {
VirtQueueElement *elem;
/*
* Number of descriptors exposed to the device. May or may not match
* guest's
*/
unsigned int ndescs;
} SVQDescState;
/* Shadow virtqueue to relay notifications */