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From 46e80a9350a02fdb5689638df96bc7389e953cf8 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: Tue, 17 Jan 2023 11:53:08 +0100
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Subject: [PATCH 13/14] vdpa: fix VHOST_BACKEND_F_IOTLB_ASID flag check
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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: [13/13] b7fb4b8e9ea26b6664a9179ed0a88376acf5115f (eperezmartin/qemu-kvm)
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VHOST_BACKEND_F_IOTLB_ASID is the feature bit, not the bitmask. Since
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the device under test also provided VHOST_BACKEND_F_IOTLB_MSG_V2 and
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VHOST_BACKEND_F_IOTLB_BATCH, this went unnoticed.
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Fixes: c1a1008685 ("vdpa: always start CVQ in SVQ mode if possible")
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Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
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Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
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Acked-by: Jason Wang <jasowang@redhat.com>
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Signed-off-by: Jason Wang <jasowang@redhat.com>
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Upstream status: git@github.com:jasowang/qemu.git
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(cherry picked from commit 2bd492bca521ee8594f1d5db8dc9aac126fc4f85)
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---
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net/vhost-vdpa.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
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index 07d33dae26..7d9c4ea09d 100644
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--- a/net/vhost-vdpa.c
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+++ b/net/vhost-vdpa.c
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@@ -384,7 +384,7 @@ static int vhost_vdpa_net_cvq_start(NetClientState *nc)
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g_strerror(errno), errno);
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return -1;
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}
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- if (!(backend_features & VHOST_BACKEND_F_IOTLB_ASID) ||
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+ if (!(backend_features & BIT_ULL(VHOST_BACKEND_F_IOTLB_ASID)) ||
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!vhost_vdpa_net_valid_svq_features(v->dev->features, NULL)) {
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return 0;
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}
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--
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2.31.1
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