From: Thomas Monjalon <thomas@monjalon.net>
To: "Burakov, Anatoly" <anatoly.burakov@intel.com>
Cc: Jerin Jacob Kollanukkaran <jerinj@marvell.com>,
David Marchand <david.marchand@redhat.com>, dev <dev@dpdk.org>,
Ben Walker <benjamin.walker@intel.com>
Subject: Re: [dpdk-dev] [EXT] Re: [PATCH] bus/pci: fix IOVA as VA mode selection
Date: Tue, 09 Jul 2019 17:12:22 +0200 [thread overview]
Message-ID: <2514934.U1Lao15di9@xps> (raw)
In-Reply-To: <ce76637e-180b-247b-5703-85b7226b9af4@intel.com>
09/07/2019 17:02, Burakov, Anatoly:
> When IOMMU is fully enabled (iommu=on at boot time), igb_uio will simply
> not work. VFIO will work, whichever address mode you use.
>
> When IOMMU is in pass-through mode (iommu=pt at boot time), both igb_uio
> and VFIO will work, although igb_uio will only support IOVA as PA mode.
> Both modes will enable IOMMU, and both can run in IOVA as PA mode
> without losing that protection.
>
> It's only when IOMMU is off, igb_uio will not engage IOMMU, and VFIO
> will only work in no-IOMMU mode (thus not engaging IOMMU either), and
> only then you lack the IOMMU protection.
Could we try to make IOMMU status clear in DPDK logs?
Then we could check the kernel drivers loaded and give
a compatibility status for each of them as debug logs.
next prev parent reply other threads:[~2019-07-09 15:12 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
2019-07-09 15:02 ` Burakov, Anatoly
2019-07-09 15:12 ` Thomas Monjalon [this message]
2019-07-09 15:18 ` Burakov, Anatoly
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