The Intel IOMMU driver will put devices into a static identity
mapped domain during boot if the kernel parameter "iommu=pt" is
used. That means the IOMMU hardware will translate a DMA address
into the same memory address.
Unfortunately, hot-added devices are not subject to this. That
results in so
On 02/24/19 at 09:25pm, Pingfan Liu wrote:
> On Fri, Feb 22, 2019 at 9:00 PM Borislav Petkov wrote:
> >
> > On Fri, Feb 22, 2019 at 09:42:41AM +0100, Joerg Roedel wrote:
> > > The current default of 256MB was found by experiments on a bigger
> > > number of machines, to create a reasonable default
On Thu, Feb 14, 2019 at 1:12 AM Vlastimil Babka wrote:
>
> On 1/22/19 11:51 PM, Nicolas Boichat wrote:
> > Hi Andrew,
> >
> > On Fri, Jan 11, 2019 at 6:21 PM Joerg Roedel wrote:
> >>
> >> On Wed, Jan 02, 2019 at 01:51:45PM +0800, Nicolas Boichat wrote:
> >> > Does anyone have any further comment
Joerg: Just to make sure, is this patch in your queue? Thanks.
On Thu, Jan 31, 2019 at 2:21 AM Will Deacon wrote:
>
> On Mon, Jan 28, 2019 at 05:43:01PM +0800, Nicolas Boichat wrote:
> > L1 tables are allocated with __get_dma_pages, and therefore already
> > ignored by kmemleak.
> >
> > Without t
Baolu:
Yes, it is a generic issue for hotplug devices with current Intel IOMMU driver,
as reported in this thread as well.
The patch you provided does the job in our case. Please update this thread once
your patch is merged. Thanks.
Best Regards,
James
On 2/23/19 12:56 AM, Lu Baolu wrote
>
> @@
On Fri, Feb 22, 2019 at 9:00 PM Borislav Petkov wrote:
>
> On Fri, Feb 22, 2019 at 09:42:41AM +0100, Joerg Roedel wrote:
> > The current default of 256MB was found by experiments on a bigger
> > number of machines, to create a reasonable default that is at least
> > likely to be sufficient of an a
Hi James,
On 2/22/19 3:36 PM, James Dong wrote:
Baolu:
Sorry that my last reply email seems not text format. Resend it now.
Thanks for your comments and your patch. Please find below our responses to
each of your comments:
What does "I/O operation won't work" exactly mean here? Do you see an
