136 lines
4.9 KiB
Diff
136 lines
4.9 KiB
Diff
From 14200f493243f73152ea4a4b97274f0ec4fb36fa 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 15/32] vhost: Add 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: [15/27] 2e2866f22e37cace8598ff44dfcdc07fcc915d6d (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 9e87868fcaf5785c8e1490c290505fa32305ff91
|
|
Author: Eugenio Pérez <eperezma@redhat.com>
|
|
Date: Wed Jul 20 08:59:34 2022 +0200
|
|
|
|
vhost: Add SVQDescState
|
|
|
|
This will allow SVQ to add context to the different queue elements.
|
|
|
|
This patch only store the actual element, no functional change intended.
|
|
|
|
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 | 16 ++++++++--------
|
|
hw/virtio/vhost-shadow-virtqueue.h | 8 ++++++--
|
|
2 files changed, 14 insertions(+), 10 deletions(-)
|
|
|
|
diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c
|
|
index 3cec03d709..a08e3d4025 100644
|
|
--- a/hw/virtio/vhost-shadow-virtqueue.c
|
|
+++ b/hw/virtio/vhost-shadow-virtqueue.c
|
|
@@ -256,7 +256,7 @@ static int vhost_svq_add(VhostShadowVirtqueue *svq, const struct iovec *out_sg,
|
|
return -EINVAL;
|
|
}
|
|
|
|
- svq->ring_id_maps[qemu_head] = elem;
|
|
+ svq->desc_state[qemu_head].elem = elem;
|
|
vhost_svq_kick(svq);
|
|
return 0;
|
|
}
|
|
@@ -411,21 +411,21 @@ static VirtQueueElement *vhost_svq_get_buf(VhostShadowVirtqueue *svq,
|
|
return NULL;
|
|
}
|
|
|
|
- if (unlikely(!svq->ring_id_maps[used_elem.id])) {
|
|
+ if (unlikely(!svq->desc_state[used_elem.id].elem)) {
|
|
qemu_log_mask(LOG_GUEST_ERROR,
|
|
"Device %s says index %u is used, but it was not available",
|
|
svq->vdev->name, used_elem.id);
|
|
return NULL;
|
|
}
|
|
|
|
- num = svq->ring_id_maps[used_elem.id]->in_num +
|
|
- svq->ring_id_maps[used_elem.id]->out_num;
|
|
+ num = svq->desc_state[used_elem.id].elem->in_num +
|
|
+ svq->desc_state[used_elem.id].elem->out_num;
|
|
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;
|
|
|
|
*len = used_elem.len;
|
|
- return g_steal_pointer(&svq->ring_id_maps[used_elem.id]);
|
|
+ return g_steal_pointer(&svq->desc_state[used_elem.id].elem);
|
|
}
|
|
|
|
static void vhost_svq_flush(VhostShadowVirtqueue *svq,
|
|
@@ -595,7 +595,7 @@ void vhost_svq_start(VhostShadowVirtqueue *svq, VirtIODevice *vdev,
|
|
memset(svq->vring.desc, 0, driver_size);
|
|
svq->vring.used = qemu_memalign(qemu_real_host_page_size, device_size);
|
|
memset(svq->vring.used, 0, device_size);
|
|
- svq->ring_id_maps = g_new0(VirtQueueElement *, svq->vring.num);
|
|
+ svq->desc_state = g_new0(SVQDescState, svq->vring.num);
|
|
svq->desc_next = g_new0(uint16_t, svq->vring.num);
|
|
for (unsigned i = 0; i < svq->vring.num - 1; i++) {
|
|
svq->desc_next[i] = cpu_to_le16(i + 1);
|
|
@@ -620,7 +620,7 @@ void vhost_svq_stop(VhostShadowVirtqueue *svq)
|
|
|
|
for (unsigned i = 0; i < svq->vring.num; ++i) {
|
|
g_autofree VirtQueueElement *elem = NULL;
|
|
- elem = g_steal_pointer(&svq->ring_id_maps[i]);
|
|
+ elem = g_steal_pointer(&svq->desc_state[i].elem);
|
|
if (elem) {
|
|
virtqueue_detach_element(svq->vq, elem, 0);
|
|
}
|
|
@@ -632,7 +632,7 @@ void vhost_svq_stop(VhostShadowVirtqueue *svq)
|
|
}
|
|
svq->vq = NULL;
|
|
g_free(svq->desc_next);
|
|
- g_free(svq->ring_id_maps);
|
|
+ g_free(svq->desc_state);
|
|
qemu_vfree(svq->vring.desc);
|
|
qemu_vfree(svq->vring.used);
|
|
}
|
|
diff --git a/hw/virtio/vhost-shadow-virtqueue.h b/hw/virtio/vhost-shadow-virtqueue.h
|
|
index c132c994e9..d646c35054 100644
|
|
--- a/hw/virtio/vhost-shadow-virtqueue.h
|
|
+++ b/hw/virtio/vhost-shadow-virtqueue.h
|
|
@@ -15,6 +15,10 @@
|
|
#include "standard-headers/linux/vhost_types.h"
|
|
#include "hw/virtio/vhost-iova-tree.h"
|
|
|
|
+typedef struct SVQDescState {
|
|
+ VirtQueueElement *elem;
|
|
+} SVQDescState;
|
|
+
|
|
/* Shadow virtqueue to relay notifications */
|
|
typedef struct VhostShadowVirtqueue {
|
|
/* Shadow vring */
|
|
@@ -47,8 +51,8 @@ typedef struct VhostShadowVirtqueue {
|
|
/* IOVA mapping */
|
|
VhostIOVATree *iova_tree;
|
|
|
|
- /* Map for use the guest's descriptors */
|
|
- VirtQueueElement **ring_id_maps;
|
|
+ /* SVQ vring descriptors state */
|
|
+ SVQDescState *desc_state;
|
|
|
|
/* Next VirtQueue element that guest made available */
|
|
VirtQueueElement *next_guest_avail_elem;
|
|
--
|
|
2.31.1
|
|
|