* [dpdk-users] IOMMU support in UIO
@ 2017-07-19 18:31 edin burgh
2017-07-19 19:04 ` Stephen Hemminger
0 siblings, 1 reply; 5+ messages in thread
From: edin burgh @ 2017-07-19 18:31 UTC (permalink / raw)
To: users
Hello,
I wanted to know if igb_uio or uio_pci_generic has support for IOMMU on x86
systems.
Thanks
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-users] IOMMU support in UIO
2017-07-19 18:31 [dpdk-users] IOMMU support in UIO edin burgh
@ 2017-07-19 19:04 ` Stephen Hemminger
2017-07-19 20:13 ` edin burgh
0 siblings, 1 reply; 5+ messages in thread
From: Stephen Hemminger @ 2017-07-19 19:04 UTC (permalink / raw)
To: edin burgh; +Cc: users
On Wed, 19 Jul 2017 11:31:28 -0700
edin burgh <edin.burgh.2357@gmail.com> wrote:
> Hello,
>
> I wanted to know if igb_uio or uio_pci_generic has support for IOMMU on x86
> systems.
If you have an IOMMU, use VFIO. igb_uio and uio_pci_generic are unsafe and provide
no memory protection.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-users] IOMMU support in UIO
2017-07-19 19:04 ` Stephen Hemminger
@ 2017-07-19 20:13 ` edin burgh
2017-07-19 20:33 ` Stephen Hemminger
0 siblings, 1 reply; 5+ messages in thread
From: edin burgh @ 2017-07-19 20:13 UTC (permalink / raw)
To: Stephen Hemminger; +Cc: users
Thank you for the reply Stephen. Safety and protection issues aside, do
uio_pci_generic and igb_uio have the functionality to support IOMMU?
Thanks
On Jul 19, 2017 12:04, "Stephen Hemminger" <stephen@networkplumber.org>
wrote:
On Wed, 19 Jul 2017 11:31:28 -0700
edin burgh <edin.burgh.2357@gmail.com> wrote:
> Hello,
>
> I wanted to know if igb_uio or uio_pci_generic has support for IOMMU on
x86
> systems.
If you have an IOMMU, use VFIO. igb_uio and uio_pci_generic are unsafe and
provide
no memory protection.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-users] IOMMU support in UIO
2017-07-19 20:13 ` edin burgh
@ 2017-07-19 20:33 ` Stephen Hemminger
2017-07-19 20:34 ` edin burgh
0 siblings, 1 reply; 5+ messages in thread
From: Stephen Hemminger @ 2017-07-19 20:33 UTC (permalink / raw)
To: edin burgh; +Cc: users
On Wed, 19 Jul 2017 13:13:34 -0700
edin burgh <edin.burgh.2357@gmail.com> wrote:
> Thank you for the reply Stephen. Safety and protection issues aside, do
> uio_pci_generic and igb_uio have the functionality to support IOMMU?
No they dont use IOMMU. There was also a bug in some releases that if
the IOMMU was enabled, it would block access via UIO.
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [dpdk-users] IOMMU support in UIO
2017-07-19 20:33 ` Stephen Hemminger
@ 2017-07-19 20:34 ` edin burgh
0 siblings, 0 replies; 5+ messages in thread
From: edin burgh @ 2017-07-19 20:34 UTC (permalink / raw)
To: Stephen Hemminger; +Cc: users
Ok, thanks for the clarification.
On Jul 19, 2017 13:33, "Stephen Hemminger" <stephen@networkplumber.org>
wrote:
> On Wed, 19 Jul 2017 13:13:34 -0700
> edin burgh <edin.burgh.2357@gmail.com> wrote:
>
> > Thank you for the reply Stephen. Safety and protection issues aside, do
> > uio_pci_generic and igb_uio have the functionality to support IOMMU?
>
> No they dont use IOMMU. There was also a bug in some releases that if
> the IOMMU was enabled, it would block access via UIO.
>
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2017-07-19 20:34 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2017-07-19 18:31 [dpdk-users] IOMMU support in UIO edin burgh
2017-07-19 19:04 ` Stephen Hemminger
2017-07-19 20:13 ` edin burgh
2017-07-19 20:33 ` Stephen Hemminger
2017-07-19 20:34 ` edin burgh
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