Messages in this thread | | | Subject | Re: [PATCH v4 04/18] vdpa_sim: make IOTLB entries limit configurable | From | Jason Wang <> | Date | Thu, 17 Dec 2020 12:29:27 +0800 |
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On 2020/12/15 下午10:42, Stefano Garzarella wrote: > 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>
Acked-by: Jason Wang <jasowang@redhat.com>
> --- > drivers/vdpa/vdpa_sim/vdpa_sim.c | 7 ++++++- > 1 file changed, 6 insertions(+), 1 deletion(-) > > 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; >
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