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Message-Id: <20201215144256.155342-5-sgarzare@redhat.com>
Date: Tue, 15 Dec 2020 15:42:42 +0100
From: Stefano Garzarella <sgarzare@...hat.com>
To: virtualization@...ts.linux-foundation.org
Cc: Oren Duer <oren@...dia.com>, Laurent Vivier <lvivier@...hat.com>,
Max Gurtovoy <mgurtovoy@...dia.com>,
Randy Dunlap <rdunlap@...radead.org>,
Shahaf Shuler <shahafs@...dia.com>,
Stefan Hajnoczi <stefanha@...hat.com>,
"Michael S. Tsirkin" <mst@...hat.com>, Eli Cohen <elic@...dia.com>,
linux-kernel@...r.kernel.org,
Stefano Garzarella <sgarzare@...hat.com>,
Jason Wang <jasowang@...hat.com>
Subject: [PATCH v4 04/18] 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@...hat.com>
Signed-off-by: Stefano Garzarella <sgarzare@...hat.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;
--
2.26.2
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