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From: Dave Jiang <dave.jiang@intel.com>
To: Logan Gunthorpe <logang@deltatee.com>,
	Kit Chow <kchow@gigaio.com>, Eric Pilmore <epilmore@gigaio.com>,
	Bjorn Helgaas <helgaas@kernel.org>
Cc: "linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
	David Woodhouse <dwmw2@infradead.org>,
	Alex Williamson <alex.williamson@redhat.com>,
	"iommu@lists.linux-foundation.org"
	<iommu@lists.linux-foundation.org>
Subject: Re: IOAT DMA w/IOMMU
Date: Fri, 10 Aug 2018 10:46:31 -0700
Message-ID: <499934e7-3734-1aee-37dd-b42a5d2a2608@intel.com> (raw)
In-Reply-To: <f22c565e-ba49-c83d-3e51-7967664c7136@deltatee.com>



On 08/10/2018 10:15 AM, Logan Gunthorpe wrote:
> 
> 
> On 10/08/18 11:01 AM, Dave Jiang wrote:
>> Or if the BIOS has provided mapping for the Intel NTB device
>> specifically? Is that a possibility? NTB does go through the IOMMU.
> 
> I don't know but if the BIOS is doing it, but that would only at best
> work for Intel NTB.... I see no hope in getting the BIOS to map the MW
> for a Switchtec NTB device...

Right. I'm just speculating why it may possibly work. But yes, I think
kernel will need appropriate mapping if it's not happening right now.
Hopefully Kit is onto something.

> 
> Logan
> 

  reply index

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-09 18:14 Eric Pilmore
2018-08-09 18:43 ` Bjorn Helgaas
2018-08-09 18:51   ` Eric Pilmore
2018-08-09 19:35     ` Logan Gunthorpe
2018-08-09 19:47       ` Kit Chow
2018-08-09 20:11         ` Logan Gunthorpe
2018-08-09 20:57           ` Kit Chow
2018-08-09 21:11             ` Logan Gunthorpe
2018-08-09 21:47               ` Kit Chow
2018-08-09 22:40                 ` Jiang, Dave
2018-08-09 22:48                   ` Kit Chow
2018-08-09 22:50                     ` Logan Gunthorpe
2018-08-09 23:00                       ` Kit Chow
2018-08-10 16:02                         ` Kit Chow
2018-08-10 16:23                           ` Kit Chow
2018-08-10 16:24                             ` Logan Gunthorpe
2018-08-10 16:24                           ` Logan Gunthorpe
2018-08-10 16:31                             ` Dave Jiang
2018-08-10 16:33                               ` Logan Gunthorpe
2018-08-10 17:01                                 ` Dave Jiang
2018-08-10 17:15                                   ` Logan Gunthorpe
2018-08-10 17:46                                     ` Dave Jiang [this message]
2018-08-11  0:53                                       ` Kit Chow
2018-08-11  2:10                                         ` Logan Gunthorpe
2018-08-13 14:23                                           ` Kit Chow
2018-08-13 14:59                                             ` Robin Murphy
2018-08-13 15:21                                               ` Kit Chow
2018-08-13 23:30                                                 ` Kit Chow
2018-08-13 23:39                                                   ` Logan Gunthorpe
2018-08-13 23:48                                                     ` Kit Chow
2018-08-13 23:50                                                       ` Logan Gunthorpe
2018-08-14 13:47                                                         ` Kit Chow
2018-08-14 14:03                                                         ` Robin Murphy
2018-08-13 23:36                                                 ` Kit Chow
2018-08-09 21:31       ` Eric Pilmore
2018-08-09 21:36         ` Logan Gunthorpe
2018-08-16 17:16           ` Kit Chow
2018-08-16 17:21             ` Logan Gunthorpe
2018-08-16 18:53               ` Kit Chow
2018-08-16 18:56                 ` Logan Gunthorpe
2018-08-21 23:18                   ` Eric Pilmore
2018-08-21 23:20                     ` Logan Gunthorpe
2018-08-21 23:28                       ` Eric Pilmore
2018-08-21 23:35                         ` Logan Gunthorpe
2018-08-21 23:45                           ` Eric Pilmore
2018-08-21 23:53                             ` Logan Gunthorpe
2018-08-21 23:59                               ` Eric Pilmore
2018-08-21 23:30                       ` Eric Pilmore

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