From: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
To: Bruce Richardson <bruce.richardson@intel.com>
Cc: David Marchand <david.marchand@redhat.com>, dev <dev@dpdk.org>,
"Thomas Monjalon" <thomas@monjalon.net>,
Ben Walker <benjamin.walker@intel.com>,
"Burakov, Anatoly" <anatoly.burakov@intel.com>
Subject: Re: [dpdk-dev] [EXT] Re: [PATCH] bus/pci: fix IOVA as VA mode selection
Date: Tue, 9 Jul 2019 09:05:07 +0000 [thread overview]
Message-ID: <BYAPR18MB2424CDE4C4520F5E9BDEE8B5C8F10@BYAPR18MB2424.namprd18.prod.outlook.com> (raw)
In-Reply-To: <20190709083950.GA485@bricha3-MOBL.ger.corp.intel.com>
> -----Original Message-----
> From: Bruce Richardson <bruce.richardson@intel.com>
> Sent: Tuesday, July 9, 2019 2:10 PM
> To: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
> Cc: David Marchand <david.marchand@redhat.com>; dev <dev@dpdk.org>;
> Thomas Monjalon <thomas@monjalon.net>; Ben Walker
> <benjamin.walker@intel.com>; Burakov, Anatoly
> <anatoly.burakov@intel.com>
> Subject: Re: [dpdk-dev] [EXT] Re: [PATCH] bus/pci: fix IOVA as VA mode
> selection
>
> On Mon, Jul 08, 2019 at 07:13:28PM +0000, Jerin Jacob Kollanukkaran wrote:
> > See below,
> >
> > Please send the email as text to avoid formatting issue.(No HTML)
> >
> > From: David Marchand <david.marchand@redhat.com>
> > Sent: Tuesday, July 9, 2019 12:09 AM
> > To: Jerin Jacob Kollanukkaran <jerinj@marvell.com>
> > Cc: dev <dev@dpdk.org>; Thomas Monjalon <thomas@monjalon.net>;
> Ben
> > Walker <benjamin.walker@intel.com>; Burakov, Anatoly
> > <anatoly.burakov@intel.com>
> > Subject: [EXT] Re: [dpdk-dev] [PATCH] bus/pci: fix IOVA as VA mode
> > selection
> >
> > ________________________________________
> >
> > On Mon, Jul 8, 2019 at 4:25 PM <mailto:jerinj@marvell.com> wrote:
> > From: Jerin Jacob <mailto:jerinj@marvell.com>
> >
> > Existing logic fails to select IOVA mode as VA if driver request to
> > enable IOVA as VA.
> >
> > IOVA as VA has more strict requirement than other modes, so enabling
> > positive logic for IOVA as VA selection.
> >
> > This patch also updates the default IOVA mode as PA for PCI devices as
> > it has to deal with DMA engines unlike the virtual devices that may
> > need only IOVA as DC.
> >
> > We have three cases:
> > - driver/hw supports IOVA as PA only
> >
> > [Jerin] It is not driver cap, it is more of system cap(IOMMU vs non
> > IOMMU). We are already addressing that case
> >
>
> Not necessarily. It's possible to have hardware that does not use the IOMMU
> on a platform. Therefore, you have more than two options to support.
Any example such device?
>
> /Bruce
next prev parent reply other threads:[~2019-07-09 9:05 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 [this message]
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
2019-07-09 15:18 ` Burakov, Anatoly
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