| Message ID | 20211122084948.39382-1-xuan.ding@intel.com (mailing list archive) |
|---|---|
| State | Accepted, archived |
| Delegated to: | Maxime Coquelin |
| Headers | show |
| Series | doc: update recommended IOVA mode for async vhost | expand |
| Context | Check | Description |
|---|---|---|
| ci/intel-Testing | success | Testing PASS |
| ci/Intel-compilation | success | Compilation OK |
| ci/iol-aarch64-compile-testing | success | Testing PASS |
| ci/iol-x86_64-compile-testing | success | Testing PASS |
| ci/iol-intel-Performance | success | Performance Testing PASS |
| ci/iol-aarch64-unit-testing | success | Testing PASS |
| ci/iol-x86_64-unit-testing | success | Testing PASS |
| ci/iol-intel-Functional | success | Functional Testing PASS |
| ci/iol-broadcom-Functional | success | Functional Testing PASS |
| ci/iol-broadcom-Performance | success | Performance Testing PASS |
| ci/iol-mellanox-Performance | success | Performance Testing PASS |
| ci/github-robot: build | success | github build: passed |
| ci/checkpatch | success | coding style OK |
On 11/22/21 09:49, Xuan Ding wrote: > 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 Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com> Thanks, Maxime
On 11/22/21 09:49, Xuan Ding wrote: > 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 Applied to dpdk-next-virtio/main. Thanks, Maxime
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
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(+)