From: Xuan Ding <xuan.ding@intel.com>
To: maxime.coquelin@redhat.com, chenbo.xia@intel.com
Cc: dev@dpdk.org, jiayu.hu@intel.com, yinan.wang@intel.com,
xingguang.he@intel.com, Xuan Ding <xuan.ding@intel.com>
Subject: [PATCH] doc: update recommended IOVA mode for async vhost
Date: Mon, 22 Nov 2021 08:49:48 +0000 [thread overview]
Message-ID: <20211122084948.39382-1-xuan.ding@intel.com> (raw)
DPDK 21.11 adds vfio support for DMA device in vhost. This patch
updates recommended IOVA mode in async datapath.
Signed-off-by: Xuan Ding <xuan.ding@intel.com>
---
doc/guides/prog_guide/vhost_lib.rst | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/doc/guides/prog_guide/vhost_lib.rst b/doc/guides/prog_guide/vhost_lib.rst
index 76f5d303c9..f72ce75909 100644
--- a/doc/guides/prog_guide/vhost_lib.rst
+++ b/doc/guides/prog_guide/vhost_lib.rst
@@ -442,3 +442,12 @@ Finally, a set of device ops is defined for device specific operations:
* ``get_notify_area``
Called to get the notify area info of the queue.
+
+Recommended IOVA mode in async datapath
+---------------------------------------
+
+When DMA devices are bound to vfio driver, VA mode is recommended.
+For PA mode, page by page mapping may exceed IOMMU's max capability,
+better to use 1G guest hugepage.
+
+For uio driver, any vfio related error message can be ignored.
\ No newline at end of file
--
2.17.1
next reply other threads:[~2021-11-22 9:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-22 8:49 Xuan Ding [this message]
2022-01-31 8:41 ` Maxime Coquelin
2022-02-08 11:10 ` Maxime Coquelin
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