From: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
To: "Burakov, Anatoly" <anatoly.burakov@intel.com>,
David Marchand <david.marchand@redhat.com>
Cc: dev <dev@dpdk.org>, Thomas Monjalon <thomas@monjalon.net>,
Ben Walker <benjamin.walker@intel.com>
Subject: Re: [dpdk-dev] [EXT] Re: [PATCH] bus/pci: fix IOVA as VA mode selection
Date: Tue, 9 Jul 2019 14:58:29 +0000 [thread overview]
Message-ID: <BYAPR18MB2424B15F7CB2D9F46C4A26A8C8F10@BYAPR18MB2424.namprd18.prod.outlook.com> (raw)
In-Reply-To: <5b8685a1-9cd5-4260-4ae9-2ce128d5e3ee@intel.com>
> -----Original Message-----
> From: Burakov, Anatoly <anatoly.burakov@intel.com>
> Sent: Tuesday, July 9, 2019 8:24 PM
> To: Jerin Jacob Kollanukkaran <jerinj@marvell.com>; David Marchand
> <david.marchand@redhat.com>
> Cc: dev <dev@dpdk.org>; Thomas Monjalon <thomas@monjalon.net>; Ben
> Walker <benjamin.walker@intel.com>
> Subject: Re: [EXT] Re: [dpdk-dev] [PATCH] bus/pci: fix IOVA as VA mode
> selection
>
> On 09-Jul-19 3:00 PM, Jerin Jacob Kollanukkaran wrote:
> >> -----Original Message-----
> >> From: Burakov, Anatoly <anatoly.burakov@intel.com>
> >> Sent: Tuesday, July 9, 2019 7:00 PM
> >> To: Jerin Jacob Kollanukkaran <jerinj@marvell.com>; David Marchand
> >> <david.marchand@redhat.com>
> >> Cc: dev <dev@dpdk.org>; Thomas Monjalon <thomas@monjalon.net>;
> Ben
> >> Walker <benjamin.walker@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
Yes. It was thinking more of VFIO perspective. Not igb_uio.
> addresses as, and the fact that they're 1:1 PA addresses doesn't mean
> IOMMU is not engaged.
>
> --
> Thanks,
> Anatoly
next prev parent reply other threads:[~2019-07-09 14:58 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-08 14:24 [dpdk-dev] " jerinj
2019-07-08 18:39 ` David Marchand
2019-07-08 19:13 ` [dpdk-dev] [EXT] " Jerin Jacob Kollanukkaran
2019-07-09 8:39 ` Bruce Richardson
2019-07-09 9:05 ` Jerin Jacob Kollanukkaran
2019-07-09 9:32 ` Bruce Richardson
2019-07-09 9:44 ` Burakov, Anatoly
2019-07-09 11:13 ` Jerin Jacob Kollanukkaran
2019-07-09 11:40 ` Burakov, Anatoly
2019-07-09 12:11 ` Jerin Jacob Kollanukkaran
2019-07-09 13:30 ` Burakov, Anatoly
2019-07-09 13:50 ` Burakov, Anatoly
2019-07-09 14:19 ` Jerin Jacob Kollanukkaran
2019-07-09 14:00 ` Jerin Jacob Kollanukkaran
2019-07-09 14:37 ` Burakov, Anatoly
2019-07-09 15:04 ` Thomas Monjalon
2019-07-09 15:06 ` Burakov, Anatoly
2019-07-09 17:50 ` Jerin Jacob Kollanukkaran
2019-07-10 8:09 ` David Marchand
2019-07-09 14:54 ` Burakov, Anatoly
2019-07-09 14:58 ` Jerin Jacob Kollanukkaran [this message]
2019-07-09 15:02 ` Burakov, Anatoly
2019-07-09 15:12 ` Thomas Monjalon
2019-07-09 15:18 ` Burakov, Anatoly
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