On Wed, Sep 07, 2022 at 08:31:09AM -0700, Stephen Hemminger wrote: > On Wed, 7 Sep 2022 19:13:36 +0530 Shijith Thotton <sthot...@marvell.com> > wrote: > > > IOVA mode in DPDK is either PA or VA. The new build option iova_as_va > > configures the mode to VA at compile time and prevents setting it to PA > > at runtime. For now, all drivers which are not always enabled are > > disabled with this option. Supported driver can set the flag > > pmd_iova_as_va in its build file to enable build. > > > > mbuf structure holds the physical (PA) and virtual address (VA) of a > > buffer. if IOVA mode is set to VA, PA is redundant as it is the same as > > VA. So PA field need not be updated and marked invalid if the build is > > configured to use only VA. > > > > Signed-off-by: Shijith Thotton <sthot...@marvell.com> > > NAK This works ok for use cases where NFV is building local version of > DPDK, but meson options dont work for distro vendors. > I think for something of this magnitude a build-time option is definitely the way to go. Sure, it won't be available in distro-packages, but for something like this it's just too invasive - and rather niche IMHO - to make a runtime option.
/Bruce
