virtualization.lists.linux-foundation.org archive mirror
 help / color / mirror / Atom feed
From: Stefano Garzarella <sgarzare@redhat.com>
To: virtualization@lists.linux-foundation.org
Cc: Laurent Vivier <lvivier@redhat.com>,
	Max Gurtovoy <mgurtovoy@nvidia.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	Randy Dunlap <rdunlap@infradead.org>,
	linux-kernel@vger.kernel.org, Shahaf Shuler <shahafs@nvidia.com>,
	Stefan Hajnoczi <stefanha@redhat.com>,
	Eli Cohen <elic@nvidia.com>, Oren Duer <oren@nvidia.com>
Subject: [PATCH v4 04/18] vdpa_sim: make IOTLB entries limit configurable
Date: Tue, 15 Dec 2020 15:42:42 +0100	[thread overview]
Message-ID: <20201215144256.155342-5-sgarzare@redhat.com> (raw)
In-Reply-To: <20201215144256.155342-1-sgarzare@redhat.com>

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>
---
 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

_______________________________________________
Virtualization mailing list
Virtualization@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/virtualization

  parent reply	other threads:[~2020-12-15 14:43 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-15 14:42 [PATCH v4 00/18] vdpa: generalize vdpa simulator Stefano Garzarella
2020-12-15 14:42 ` [PATCH v4 01/18] vdpa: remove unnecessary 'default n' in Kconfig entries Stefano Garzarella
2020-12-15 14:42 ` [PATCH v4 02/18] vdpa_sim: remove unnecessary headers inclusion Stefano Garzarella
2020-12-15 14:42 ` [PATCH v4 03/18] vdpa_sim: remove hard-coded virtq count Stefano Garzarella
2020-12-15 14:42 ` Stefano Garzarella [this message]
2020-12-17  4:29   ` [PATCH v4 04/18] vdpa_sim: make IOTLB entries limit configurable Jason Wang
2020-12-15 14:42 ` [PATCH v4 05/18] vdpa_sim: rename vdpasim_config_ops variables Stefano Garzarella
2020-12-15 14:42 ` [PATCH v4 06/18] vdpa_sim: add struct vdpasim_dev_attr for device attributes Stefano Garzarella
2020-12-15 14:42 ` [PATCH v4 07/18] vdpa_sim: add device id field in vdpasim_dev_attr Stefano Garzarella
2020-12-15 14:42 ` [PATCH v4 08/18] vdpa_sim: add supported_features " Stefano Garzarella
2020-12-15 14:42 ` [PATCH v4 09/18] vdpa_sim: add work_fn " Stefano Garzarella
2020-12-15 14:42 ` [PATCH v4 10/18] vdpa_sim: store parsed MAC address in a buffer Stefano Garzarella
2020-12-15 14:42 ` [PATCH v4 11/18] vdpa_sim: make 'config' generic and usable for any device type Stefano Garzarella
2020-12-15 14:42 ` [PATCH v4 12/18] vdpa_sim: add get_config callback in vdpasim_dev_attr Stefano Garzarella
2020-12-17  5:30   ` Jason Wang
2020-12-15 14:42 ` [PATCH v4 13/18] vdpa_sim: add set_config " Stefano Garzarella
2020-12-15 14:42 ` [PATCH v4 14/18] vdpa_sim: set vringh notify callback Stefano Garzarella
2020-12-15 14:42 ` [PATCH v4 15/18] vdpa_sim: use kvmalloc to allocate vdpasim->buffer Stefano Garzarella
2020-12-15 14:42 ` [PATCH v4 16/18] vdpa_sim: make vdpasim->buffer size configurable Stefano Garzarella
2020-12-15 14:42 ` [PATCH v4 17/18] vdpa_sim: split vdpasim_virtqueue's iov field in out_iov and in_iov Stefano Garzarella
2020-12-15 14:42 ` [PATCH v4 18/18] vdpa: split vdpasim to core and net modules Stefano Garzarella

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20201215144256.155342-5-sgarzare@redhat.com \
    --to=sgarzare@redhat.com \
    --cc=elic@nvidia.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=lvivier@redhat.com \
    --cc=mgurtovoy@nvidia.com \
    --cc=mst@redhat.com \
    --cc=oren@nvidia.com \
    --cc=rdunlap@infradead.org \
    --cc=shahafs@nvidia.com \
    --cc=stefanha@redhat.com \
    --cc=virtualization@lists.linux-foundation.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).