55 lines
1.9 KiB
Diff
55 lines
1.9 KiB
Diff
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From 7a2278d9cdd9ac2a74bb9745fdf555395ff8dcd7 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= <eperezma@redhat.com>
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Date: Thu, 15 Dec 2022 12:31:42 +0100
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Subject: [PATCH] vdpa: store x-svq parameter in VhostVDPAState
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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CVQ can be shadowed two ways:
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- Device has x-svq=on parameter (current way)
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- The device can isolate CVQ in its own vq group
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QEMU needs to check for the second condition dynamically, because CVQ
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index is not known before the driver ack the features. Since this is
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dynamic, the CVQ isolation could vary with different conditions, making
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it possible to go from "not isolated group" to "isolated".
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Saving the cmdline parameter in an extra field so we never disable CVQ
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SVQ in case the device was started with x-svq cmdline.
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Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
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Acked-by: Jason Wang <jasowang@redhat.com>
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Message-Id: <20221215113144.322011-11-eperezma@redhat.com>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Signed-off-by: fangyi <eric.fangyi@huawei.com>
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---
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net/vhost-vdpa.c | 3 +++
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1 file changed, 3 insertions(+)
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diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
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index cb1cc2523d..7adba2c2b6 100644
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--- a/net/vhost-vdpa.c
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+++ b/net/vhost-vdpa.c
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@@ -37,6 +37,8 @@ typedef struct VhostVDPAState {
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void *cvq_cmd_out_buffer;
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virtio_net_ctrl_ack *status;
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+ /* The device always have SVQ enabled */
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+ bool always_svq;
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bool started;
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} VhostVDPAState;
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@@ -575,6 +577,7 @@ static NetClientState *net_vhost_vdpa_init(NetClientState *peer,
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s->vhost_vdpa.device_fd = vdpa_device_fd;
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s->vhost_vdpa.index = queue_pair_index;
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+ s->always_svq = svq;
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s->vhost_vdpa.shadow_vqs_enabled = svq;
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s->vhost_vdpa.iova_range = iova_range;
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s->vhost_vdpa.iova_tree = iova_tree;
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--
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2.27.0
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