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authorStefano Garzarella <sgarzare@redhat.com>2020-12-15 17:42:42 +0300
committerMichael S. Tsirkin <mst@redhat.com>2020-12-19 00:14:28 +0300
commit2fc0ebfa039025d88009e8f275ea8bcd177a9cd9 (patch)
treeeaa9b38a879e148e0b09d245db4547f224be9615 /drivers/vdpa
parent423248d60d2b655321fc49eca1545f95a1bc9d6c (diff)
downloadlinux-2fc0ebfa039025d88009e8f275ea8bcd177a9cd9.tar.xz
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: Jason Wang <jasowang@redhat.com> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Link: https://lore.kernel.org/r/20201215144256.155342-5-sgarzare@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vdpa')
-rw-r--r--drivers/vdpa/vdpa_sim/vdpa_sim.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/vdpa/vdpa_sim/vdpa_sim.c b/drivers/vdpa/vdpa_sim/vdpa_sim.c
index 07ccc8609784..d716bfaadb3b 100644
--- a/drivers/vdpa/vdpa_sim/vdpa_sim.c
+++ b/drivers/vdpa/vdpa_sim/vdpa_sim.c
@@ -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;