| 1 |
On Saturday 04 Feb 2017 11:11:43 Mick wrote: |
| 2 |
> On Saturday 04 Feb 2017 10:17:13 Peter Humphrey wrote: |
| 3 |
> > On Friday 03 Feb 2017 19:40:53 Mick wrote: |
| 4 |
> > > Peter, I recall a similar problem shown in the logs of an i7. and |
| 5 |
> > > all I |
| 6 |
> > > did was to enable IOMMU in the kernel, just as a message in the logs |
| 7 |
> > > recommended. From memory I built in the kernel something like |
| 8 |
> > > CONFIG_INTEL_IOMMU_DEFAULT_ON as well as some Intel related |
| 9 |
IOMMU |
| 10 |
> > > options. I did not pass any options on the kernel line at boot time. |
| 11 |
> > > The |
| 12 |
> > > error messages stopped as a result. |
| 13 |
> > |
| 14 |
> > $ grep -i iommu /usr/src/linux/.config |
| 15 |
> > # CONFIG_GART_IOMMU is not set |
| 16 |
> > CONFIG_CALGARY_IOMMU=y |
| 17 |
> > CONFIG_CALGARY_IOMMU_ENABLED_BY_DEFAULT=y |
| 18 |
> > CONFIG_IOMMU_HELPER=y |
| 19 |
> > CONFIG_IOMMU_API=y |
| 20 |
> > CONFIG_IOMMU_SUPPORT=y |
| 21 |
> > CONFIG_IOMMU_IOVA=y |
| 22 |
> > # CONFIG_AMD_IOMMU is not set |
| 23 |
> > CONFIG_INTEL_IOMMU=y |
| 24 |
> > CONFIG_INTEL_IOMMU_SVM=y |
| 25 |
> > CONFIG_INTEL_IOMMU_DEFAULT_ON=y |
| 26 |
> > CONFIG_INTEL_IOMMU_FLOPPY_WA=y |
| 27 |
> > # CONFIG_IOMMU_STRESS is not set |
| 28 |
> > $ |
| 29 |
> > |
| 30 |
> > That looks all right to me, no? |
| 31 |
> |
| 32 |
> The only difference is I have not set CONFIG_INTEL_IOMMU_SVM on my |
| 33 |
system. |
| 34 |
|
| 35 |
Now I've just passed intel_iommu=off on the kernel command line. I'll see how |
| 36 |
that behaves; at least I don't get all those errors (warnings?) in dmesg. |
| 37 |
|
| 38 |
-- |
| 39 |
Regards |
| 40 |
Peter |
Archives