You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
82 lines
2.8 KiB
82 lines
2.8 KiB
From 24b8cf88f53f9fc7cb393c9cad908f759980bfee Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= <eperezma@redhat.com>
|
|
Date: Thu, 21 Jul 2022 15:38:55 +0200
|
|
Subject: [PATCH 16/32] vhost: Track number of descs in SVQDescState
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=UTF-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
RH-Author: Eugenio Pérez <eperezma@redhat.com>
|
|
RH-MergeRequest: 108: Net Control Virtqueue shadow Support
|
|
RH-Commit: [16/27] 26f30cb6dd35c1eb1ddabe25113431bed3d744aa (eperezmartin/qemu-kvm)
|
|
RH-Bugzilla: 1939363
|
|
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
|
|
RH-Acked-by: Cindy Lu <lulu@redhat.com>
|
|
RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
|
|
|
|
Bugzilla: https://bugzilla.redhat.com/1939363
|
|
|
|
Upstream Status: git://git.qemu.org/qemu.git
|
|
|
|
commit ac4cfdc6f39c06732d27554523f9d5f8a53b4ffa
|
|
Author: Eugenio Pérez <eperezma@redhat.com>
|
|
Date: Wed Jul 20 08:59:35 2022 +0200
|
|
|
|
vhost: Track number of descs in SVQDescState
|
|
|
|
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>
|
|
|
|
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
|
|
---
|
|
hw/virtio/vhost-shadow-virtqueue.c | 4 ++--
|
|
hw/virtio/vhost-shadow-virtqueue.h | 6 ++++++
|
|
2 files changed, 8 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c
|
|
index a08e3d4025..4d99075e73 100644
|
|
--- a/hw/virtio/vhost-shadow-virtqueue.c
|
|
+++ b/hw/virtio/vhost-shadow-virtqueue.c
|
|
@@ -257,6 +257,7 @@ static int vhost_svq_add(VhostShadowVirtqueue *svq, const struct iovec *out_sg,
|
|
}
|
|
|
|
svq->desc_state[qemu_head].elem = elem;
|
|
+ svq->desc_state[qemu_head].ndescs = ndescs;
|
|
vhost_svq_kick(svq);
|
|
return 0;
|
|
}
|
|
@@ -418,8 +419,7 @@ static VirtQueueElement *vhost_svq_get_buf(VhostShadowVirtqueue *svq,
|
|
return NULL;
|
|
}
|
|
|
|
- num = svq->desc_state[used_elem.id].elem->in_num +
|
|
- svq->desc_state[used_elem.id].elem->out_num;
|
|
+ num = svq->desc_state[used_elem.id].ndescs;
|
|
last_used_chain = vhost_svq_last_desc_of_chain(svq, num, used_elem.id);
|
|
svq->desc_next[last_used_chain] = svq->free_head;
|
|
svq->free_head = used_elem.id;
|
|
diff --git a/hw/virtio/vhost-shadow-virtqueue.h b/hw/virtio/vhost-shadow-virtqueue.h
|
|
index d646c35054..5c7e7cbab6 100644
|
|
--- a/hw/virtio/vhost-shadow-virtqueue.h
|
|
+++ b/hw/virtio/vhost-shadow-virtqueue.h
|
|
@@ -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 */
|
|
--
|
|
2.31.1
|
|
|