Hi Eric,
Ferruh has already mention that this should be part of the patch adding
the --iova-mode flag, not separate (or at the very least be in the same
patchset!).
In addition, the commit headline is very vague. Suggested rewording:
doc: document --iova-mode EAL flag
On 01-Oct-18 4:54 PM, eric zhang wrote:
This patch updates Programmer's Guide and EAL parameter guides
to show EAL option "--iova-mode" support.
Signed-off-by: eric zhang <eric.zh...@windriver.com>
---
doc/guides/prog_guide/env_abstraction_layer.rst | 8 ++++++++
doc/guides/testpmd_app_ug/run_app.rst | 4 ++++
2 files changed, 12 insertions(+)
diff --git a/doc/guides/prog_guide/env_abstraction_layer.rst
b/doc/guides/prog_guide/env_abstraction_layer.rst
index d362c92..a47fb38 100644
--- a/doc/guides/prog_guide/env_abstraction_layer.rst
+++ b/doc/guides/prog_guide/env_abstraction_layer.rst
@@ -321,6 +321,14 @@ Misc Functions
Locks and atomic operations are per-architecture (i686 and x86_64).
+IOVA Mode Configuration
+~~~~~~~~~~~~~~~~~~~~~~~
+
+Auto detection of the IOVA mode, based on probing the PCI bus and IOMMU
configuration, may not report
+the desired addressing mode when virtual devices that are not directly
attached to the PCI bus are present.
+To facilitate forcing the IOVA mode to a specific value the EAL command line
option ``--iova-mode=mode`` can
+be used to select either physical addressing('pa') or virtual addressing('va').
Presumably this isn't only applicable to PCI bus, but can be any bus,
correct?
+
Memory Segments and Memory Zones (memzone)
------------------------------------------
diff --git a/doc/guides/testpmd_app_ug/run_app.rst b/doc/guides/testpmd_app_ug/run_app.rst
index f301c2b..be2911c 100644
--- a/doc/guides/testpmd_app_ug/run_app.rst
+++ b/doc/guides/testpmd_app_ug/run_app.rst
@@ -133,6 +133,10 @@ See the DPDK Getting Started Guides for more information
on these options.
I wanted to ask why are you adding this to testpmd user guide, as this
is an EAL parameter, not a testpmd parameter, but as far as i can tell,
there isn't a central location where we document all EAL flags.
+Thomas, John
This looks like a gap in our documentation. There should be a place
where we can describe all EAL parameters. Since they can be OS-specific,
it probably should be somewhere under Linux/FreeBSD GSG. Thoughts?
Use malloc instead of hugetlbfs.
+* ``--iova-mode=mode``
Current style is to list all valid values, like this:
``--iova-mode <pa|va>``
+
+ Force IOVA mode to a specific value. Valid values are 'pa' or 'va'.
+
Testpmd Command-line Options
----------------------------
--
Thanks,
Anatoly
