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From: Jason Wang <jasowang@redhat.com>
To: mst@redhat.com, jasowang@redhat.com,
	virtualization@lists.linux-foundation.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH] vdpa_sim: do not reset IOTLB during device reset
Date: Thu, 14 May 2020 15:25:49 +0800	[thread overview]
Message-ID: <20200514072549.29694-1-jasowang@redhat.com> (raw)

We reset IOTLB during device reset this breaks the assumption that the
mapping needs to be controlled via vDPA DMA ops explicitly in a
incremental way. So the networking will be broken after e.g a guest
reset.

Fix this by not resetting the IOTLB during device reset.

Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 drivers/vdpa/vdpa_sim/vdpa_sim.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 7957d2d41fc4..cc5525743a25 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -119,8 +119,6 @@ static void vdpasim_reset(struct vdpasim *vdpasim)
 	for (i = 0; i < VDPASIM_VQ_NUM; i++)
 		vdpasim_vq_reset(&vdpasim->vqs[i]);
 
-	vhost_iotlb_reset(vdpasim->iommu);
-
 	vdpasim->features = 0;
 	vdpasim->status = 0;
 	++vdpasim->generation;
-- 
2.20.1


             reply	other threads:[~2020-05-14  7:26 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-14  7:25 Jason Wang [this message]
2020-05-14  9:35 ` Michael S. Tsirkin
2020-05-15  3:02   ` Jason Wang

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