Commit 2fc0ebfa authored by Stefano Garzarella's avatar Stefano Garzarella Committed by Michael S. Tsirkin
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vdpa_sim: make IOTLB entries limit configurable 



Some devices may require a higher limit for the number of IOTLB
entries, so let's make it configurable through a module parameter.

By default, it's initialized with the current limit (2048).

Suggested-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarStefano Garzarella <sgarzare@redhat.com>
Link: https://lore.kernel.org/r/20201215144256.155342-5-sgarzare@redhat.com


Signed-off-by: default avatarMichael S. Tsirkin <mst@redhat.com>
parent 423248d6

drivers/vdpa/vdpa_sim/vdpa_sim.c

+6 −1
Original line number Diff line number Diff line
@@ -31,6 +31,11 @@ static int batch_mapping = 1; 
module_param(batch_mapping, int, 0444);

MODULE_PARM_DESC(batch_mapping, "Batched mapping 1 -Enable; 0 - Disable");



static int max_iotlb_entries = 2048;

module_param(max_iotlb_entries, int, 0444);

MODULE_PARM_DESC(max_iotlb_entries,

		 "Maximum number of iotlb entries. 0 means unlimited. (default: 2048)");



static char *macaddr;

module_param(macaddr, charp, 0);

MODULE_PARM_DESC(macaddr, "Ethernet MAC address");
@@ -371,7 +376,7 @@ static struct vdpasim *vdpasim_create(void) 
	if (!vdpasim->vqs)

		goto err_iommu;



	vdpasim->iommu = vhost_iotlb_alloc(2048, 0);

	vdpasim->iommu = vhost_iotlb_alloc(max_iotlb_entries, 0);

	if (!vdpasim->iommu)

		goto err_iommu;