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From: Stefano Garzarella <sgarzare@redhat.com>
To: virtualization@lists.linux-foundation.org
Cc: Stefan Hajnoczi <stefanha@redhat.com>,
	"Michael S. Tsirkin" <mst@redhat.com>,
	Oren Duer <oren@nvidia.com>, Jason Wang <jasowang@redhat.com>,
	Laurent Vivier <lvivier@redhat.com>,
	Stefano Garzarella <sgarzare@redhat.com>,
	linux-kernel@vger.kernel.org, Max Gurtovoy <mgurtovoy@nvidia.com>,
	Shahaf Shuler <shahafs@nvidia.com>, Eli Cohen <elic@nvidia.com>
Subject: [PATCH v3 04/19] vhost/iotlb: add VHOST_IOTLB_UNLIMITED macro
Date: Thu,  3 Dec 2020 18:04:56 +0100	[thread overview]
Message-ID: <20201203170511.216407-5-sgarzare@redhat.com> (raw)
In-Reply-To: <20201203170511.216407-1-sgarzare@redhat.com>

It's possible to allocate an unlimited IOTLB calling
vhost_iotlb_alloc() with 'limit' = 0.

Add a new macro (VHOST_IOTLB_UNLIMITED) for this case and document
it in the vhost_iotlb_alloc() documentation block.

Suggested-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
 include/linux/vhost_iotlb.h | 2 ++
 drivers/vhost/iotlb.c       | 3 ++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/linux/vhost_iotlb.h b/include/linux/vhost_iotlb.h
index 6b09b786a762..47019f97f795 100644
--- a/include/linux/vhost_iotlb.h
+++ b/include/linux/vhost_iotlb.h
@@ -4,6 +4,8 @@
 
 #include <linux/interval_tree_generic.h>
 
+#define VHOST_IOTLB_UNLIMITED 0
+
 struct vhost_iotlb_map {
 	struct rb_node rb;
 	struct list_head link;
diff --git a/drivers/vhost/iotlb.c b/drivers/vhost/iotlb.c
index 0fd3f87e913c..80fdde78ee5a 100644
--- a/drivers/vhost/iotlb.c
+++ b/drivers/vhost/iotlb.c
@@ -100,7 +100,8 @@ EXPORT_SYMBOL_GPL(vhost_iotlb_del_range);
 
 /**
  * vhost_iotlb_alloc - add a new vhost IOTLB
- * @limit: maximum number of IOTLB entries
+ * @limit: maximum number of IOTLB entries (use VHOST_IOTLB_UNLIMITED for an
+ *         unlimited IOTLB)
  * @flags: VHOST_IOTLB_FLAG_XXX
  *
  * Returns an error is memory allocation fails
-- 
2.26.2


WARNING: multiple messages have this Message-ID (diff)
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>,
	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 v3 04/19] vhost/iotlb: add VHOST_IOTLB_UNLIMITED macro
Date: Thu,  3 Dec 2020 18:04:56 +0100	[thread overview]
Message-ID: <20201203170511.216407-5-sgarzare@redhat.com> (raw)
In-Reply-To: <20201203170511.216407-1-sgarzare@redhat.com>

It's possible to allocate an unlimited IOTLB calling
vhost_iotlb_alloc() with 'limit' = 0.

Add a new macro (VHOST_IOTLB_UNLIMITED) for this case and document
it in the vhost_iotlb_alloc() documentation block.

Suggested-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
---
 include/linux/vhost_iotlb.h | 2 ++
 drivers/vhost/iotlb.c       | 3 ++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/linux/vhost_iotlb.h b/include/linux/vhost_iotlb.h
index 6b09b786a762..47019f97f795 100644
--- a/include/linux/vhost_iotlb.h
+++ b/include/linux/vhost_iotlb.h
@@ -4,6 +4,8 @@
 
 #include <linux/interval_tree_generic.h>
 
+#define VHOST_IOTLB_UNLIMITED 0
+
 struct vhost_iotlb_map {
 	struct rb_node rb;
 	struct list_head link;
diff --git a/drivers/vhost/iotlb.c b/drivers/vhost/iotlb.c
index 0fd3f87e913c..80fdde78ee5a 100644
--- a/drivers/vhost/iotlb.c
+++ b/drivers/vhost/iotlb.c
@@ -100,7 +100,8 @@ EXPORT_SYMBOL_GPL(vhost_iotlb_del_range);
 
 /**
  * vhost_iotlb_alloc - add a new vhost IOTLB
- * @limit: maximum number of IOTLB entries
+ * @limit: maximum number of IOTLB entries (use VHOST_IOTLB_UNLIMITED for an
+ *         unlimited IOTLB)
  * @flags: VHOST_IOTLB_FLAG_XXX
  *
  * Returns an error is memory allocation fails
-- 
2.26.2

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  parent reply	other threads:[~2020-12-03 17:07 UTC|newest]

Thread overview: 70+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-03 17:04 [PATCH v3 00/19] vdpa: generalize vdpa simulator Stefano Garzarella
2020-12-03 17:04 ` Stefano Garzarella
2020-12-03 17:04 ` [PATCH v3 01/19] vdpa: remove unnecessary 'default n' in Kconfig entries Stefano Garzarella
2020-12-03 17:04   ` Stefano Garzarella
2020-12-03 17:04 ` [PATCH v3 02/19] vdpa_sim: remove unnecessary headers inclusion Stefano Garzarella
2020-12-03 17:04   ` Stefano Garzarella
2020-12-03 17:37   ` Randy Dunlap
2020-12-03 17:37     ` Randy Dunlap
2020-12-04  7:57     ` Stefano Garzarella
2020-12-04  7:57       ` Stefano Garzarella
2020-12-03 17:04 ` [PATCH v3 03/19] vdpa_sim: remove hard-coded virtq count Stefano Garzarella
2020-12-03 17:04   ` Stefano Garzarella
2020-12-03 17:04 ` Stefano Garzarella [this message]
2020-12-03 17:04   ` [PATCH v3 04/19] vhost/iotlb: add VHOST_IOTLB_UNLIMITED macro Stefano Garzarella
2020-12-07  3:55   ` Jason Wang
2020-12-07  3:55     ` Jason Wang
2020-12-03 17:04 ` [PATCH v3 05/19] vdpa_sim: remove the limit of IOTLB entries Stefano Garzarella
2020-12-03 17:04   ` Stefano Garzarella
2020-12-07  4:00   ` Jason Wang
2020-12-07  4:00     ` Jason Wang
2020-12-09 10:58     ` Stefano Garzarella
2020-12-09 10:58       ` Stefano Garzarella
2020-12-10  4:03       ` Jason Wang
2020-12-10  4:03         ` Jason Wang
2020-12-03 17:04 ` [PATCH v3 06/19] vdpa_sim: rename vdpasim_config_ops variables Stefano Garzarella
2020-12-03 17:04   ` Stefano Garzarella
2020-12-03 17:04 ` [PATCH v3 07/19] vdpa_sim: add struct vdpasim_dev_attr for device attributes Stefano Garzarella
2020-12-03 17:04   ` Stefano Garzarella
2020-12-03 17:05 ` [PATCH v3 08/19] vdpa_sim: add device id field in vdpasim_dev_attr Stefano Garzarella
2020-12-03 17:05   ` Stefano Garzarella
2020-12-03 17:05 ` [PATCH v3 09/19] vdpa_sim: add supported_features " Stefano Garzarella
2020-12-03 17:05   ` Stefano Garzarella
2020-12-03 17:05 ` [PATCH v3 10/19] vdpa_sim: add work_fn " Stefano Garzarella
2020-12-03 17:05   ` Stefano Garzarella
2020-12-03 17:05 ` [PATCH v3 11/19] vdpa_sim: store parsed MAC address in a buffer Stefano Garzarella
2020-12-03 17:05   ` Stefano Garzarella
2020-12-03 17:05 ` [PATCH v3 12/19] vdpa_sim: make 'config' generic and usable for any device type Stefano Garzarella
2020-12-03 17:05   ` Stefano Garzarella
2020-12-07  5:22   ` Jason Wang
2020-12-07  5:22     ` Jason Wang
2020-12-03 17:05 ` [PATCH v3 13/19] vdpa_sim: add get_config callback in vdpasim_dev_attr Stefano Garzarella
2020-12-03 17:05   ` Stefano Garzarella
2020-12-07  5:29   ` Jason Wang
2020-12-07  5:29     ` Jason Wang
2020-12-09 11:07     ` Stefano Garzarella
2020-12-09 11:07       ` Stefano Garzarella
2020-12-15 11:43       ` Stefano Garzarella
2020-12-15 11:43         ` Stefano Garzarella
2020-12-03 17:05 ` [PATCH v3 14/19] vdpa_sim: add set_config " Stefano Garzarella
2020-12-03 17:05   ` Stefano Garzarella
2020-12-07  5:30   ` Jason Wang
2020-12-07  5:30     ` Jason Wang
2020-12-03 17:05 ` [PATCH v3 15/19] vdpa_sim: set vringh notify callback Stefano Garzarella
2020-12-03 17:05   ` Stefano Garzarella
2020-12-07  5:30   ` Jason Wang
2020-12-07  5:30     ` Jason Wang
2020-12-03 17:05 ` [PATCH v3 16/19] vdpa_sim: use kvmalloc to allocate vdpasim->buffer Stefano Garzarella
2020-12-03 17:05   ` Stefano Garzarella
2020-12-03 17:05 ` [PATCH v3 17/19] vdpa_sim: make vdpasim->buffer size configurable Stefano Garzarella
2020-12-03 17:05   ` Stefano Garzarella
2020-12-03 17:05 ` [PATCH v3 18/19] vdpa_sim: split vdpasim_virtqueue's iov field in out_iov and in_iov Stefano Garzarella
2020-12-03 17:05   ` Stefano Garzarella
2020-12-03 17:05 ` [PATCH v3 19/19] vdpa: split vdpasim to core and net modules Stefano Garzarella
2020-12-03 17:05   ` Stefano Garzarella
2020-12-03 17:25   ` Randy Dunlap
2020-12-03 17:25     ` Randy Dunlap
2020-12-04  7:48     ` Stefano Garzarella
2020-12-04  7:48       ` Stefano Garzarella
2020-12-07  5:33   ` Jason Wang
2020-12-07  5:33     ` Jason Wang

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