On 09-Jul-19 3:00 PM, Jerin Jacob Kollanukkaran wrote:
-----Original Message----- From: Burakov, Anatoly <anatoly.bura...@intel.com> Sent: Tuesday, July 9, 2019 7:00 PM To: Jerin Jacob Kollanukkaran <jer...@marvell.com>; David Marchand <david.march...@redhat.com> Cc: dev <dev@dpdk.org>; Thomas Monjalon <tho...@monjalon.net>; Ben Walker <benjamin.wal...@intel.com> Subject: Re: [EXT] Re: [dpdk-dev] [PATCH] bus/pci: fix IOVA as VA mode selection
<snip>
# With top of tree, Currently it never runs in IOVA as VA mode. That’s a separate problem to fix. Which effect all the devices Currently supporting RTE_PCI_DRV_IOVA_AS_VA. Ie even though Device support RTE_PCI_DRV_IOVA_AS_VA, it is not running With IOMMU protection and/or root privilege is required to run DPDK.
By the way, there seems to be some confusion here. IOVA as PA mode does *not* imply running without IOMMU protection. If IOVA as PA mode is used, it would require root privileges (to get physical addresses), but the IOMMU protection is still enabled. IOMMU doesn't care what you set up your addresses as, and the fact that they're 1:1 PA addresses doesn't mean IOMMU is not engaged.
-- Thanks, Anatoly
