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From 28163d7d61b6b0b8312b78d57dabc8f44bf39c46 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 10/14] 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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RH-Author: Eugenio Pérez <eperezma@redhat.com>
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RH-MergeRequest: 136: vDPA ASID support in Qemu
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RH-Bugzilla: 2104412
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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RH-Acked-by: Cindy Lu <lulu@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Commit: [10/13] 53f3b2698b4a5caca434f55e4300103a78778548 (eperezmartin/qemu-kvm)
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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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(cherry picked from commit 7f211a28fd5482f76583988beecd8ee61588d45e)
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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 c2f319eb88..1757f1d028 100644
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--- a/net/vhost-vdpa.c
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+++ b/net/vhost-vdpa.c
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@@ -38,6 +38,8 @@ 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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@@ -576,6 +578,7 @@ 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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2.31.1
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