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From e19adb058502e24580dbc4f6f944cd951ca288ed 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, 12 May 2022 19:57:44 +0200
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Subject: [PATCH 08/11] vdpa: Fix bad index calculus at
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vhost_vdpa_get_vring_base
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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: 114: vdpa: Fix memory listener deletions of iova tree
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RH-Commit: [1/4] 754fb8960684fa7a91bddb18c8df58c3b947ee75 (eperezmartin/qemu-kvm)
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RH-Bugzilla: 2116876
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RH-Acked-by: Jason Wang <jasowang@redhat.com>
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RH-Acked-by: Cindy Lu <lulu@redhat.com>
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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Fixes: 6d0b222666 ("vdpa: Adapt vhost_vdpa_get_vring_base to SVQ")
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Acked-by: Jason Wang <jasowang@redhat.com>
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Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
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Message-Id: <20220512175747.142058-4-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 639036477ef890958415967e753ca2cbb348c16c)
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---
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hw/virtio/vhost-vdpa.c | 4 ++--
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1 file changed, 2 insertions(+), 2 deletions(-)
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diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
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index e3e5bce4bb..a7dfac530f 100644
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--- a/hw/virtio/vhost-vdpa.c
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+++ b/hw/virtio/vhost-vdpa.c
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@@ -1193,11 +1193,11 @@ static int vhost_vdpa_get_vring_base(struct vhost_dev *dev,
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struct vhost_vring_state *ring)
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{
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struct vhost_vdpa *v = dev->opaque;
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+ int vdpa_idx = ring->index - dev->vq_index;
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int ret;
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if (v->shadow_vqs_enabled) {
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- VhostShadowVirtqueue *svq = g_ptr_array_index(v->shadow_vqs,
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- ring->index);
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+ VhostShadowVirtqueue *svq = g_ptr_array_index(v->shadow_vqs, vdpa_idx);
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/*
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* Setting base as last used idx, so destination will see as available
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--
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2.31.1
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