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From:   Stefano Garzarella <sgarzare@redhat.com>
To:     virtualization@lists.linux-foundation.org
Cc:     Stefan Hajnoczi <stefanha@redhat.com>,
        linux-kernel@vger.kernel.org, Laurent Vivier <lvivier@redhat.com>,
        Max Gurtovoy <mgurtovoy@nvidia.com>,
        "Michael S. Tsirkin" <mst@redhat.com>, Eli Cohen <elic@nvidia.com>,
        Jason Wang <jasowang@redhat.com>
Subject: [PATCH v2 04/17] vdpa_sim: remove the limit of IOTLB entries
Date:   Thu, 26 Nov 2020 15:49:37 +0100
Message-Id: <20201126144950.92850-5-sgarzare@redhat.com>
In-Reply-To: <20201126144950.92850-1-sgarzare@redhat.com>
References: <20201126144950.92850-1-sgarzare@redhat.com>
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The simulated devices can support multiple queues, so this limit
should be defined according to the number of queues supported by
the device.

Since we are in a simulator, let's simply remove that limit.

Suggested-by: Jason Wang <jasowang@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
v2:
- added VDPASIM_IOTLB_LIMIT macro [Jason]
---
 drivers/vdpa/vdpa_sim/vdpa_sim.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index ad72f7b1a4eb..40664d87f303 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -46,6 +46,7 @@ struct vdpasim_virtqueue {
 #define VDPASIM_QUEUE_MAX 256
 #define VDPASIM_DEVICE_ID 0x1
 #define VDPASIM_VENDOR_ID 0
+#define VDPASIM_IOTLB_LIMIT 0 /* unlimited */
 #define VDPASIM_VQ_NUM 0x2
 #define VDPASIM_NAME "vdpasim-netdev"
 
@@ -365,7 +366,7 @@ static struct vdpasim *vdpasim_create(void)
 	if (!vdpasim->vqs)
 		goto err_iommu;
 
-	vdpasim->iommu = vhost_iotlb_alloc(2048, 0);
+	vdpasim->iommu = vhost_iotlb_alloc(VDPASIM_IOTLB_LIMIT, 0);
 	if (!vdpasim->iommu)
 		goto err_iommu;
 
-- 
2.26.2