diff options
| author | Stefano Garzarella <sgarzare@redhat.com> | 2020-12-15 15:42:42 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-12-18 16:14:28 -0500 |
| commit | 2fc0ebfa039025d88009e8f275ea8bcd177a9cd9 (patch) | |
| tree | eaa9b38a879e148e0b09d245db4547f224be9615 /drivers/vdpa/vdpa_sim/vdpa_sim.c | |
| parent | 423248d60d2b655321fc49eca1545f95a1bc9d6c (diff) | |
| download | lwn-2fc0ebfa039025d88009e8f275ea8bcd177a9cd9.tar.gz lwn-2fc0ebfa039025d88009e8f275ea8bcd177a9cd9.zip | |
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/vdpa_sim/vdpa_sim.c')
| -rw-r--r-- | drivers/vdpa/vdpa_sim/vdpa_sim.c | 7 |
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; |