Re: [gentoo-user] Re: Issues with AMD_IOMMU

[Adam Carter]

<snip>

> > [    0.991863] iommu: Adding device 0000:06:00.0 to group 12
> > [    0.991982] iommu: Adding device 0000:07:04.0 to group 12
> > [    1.063849] AMD-Vi: Found IOMMU at 0000:00:00.2 cap 0x40
> > [    1.063962] AMD-Vi: Interrupt remapping enabled
> > [    1.064145] AMD-Vi: Lazy IO/TLB flushing enabled
> > [    1.065331] perf: AMD NB counters detected
>

I'm similar, but have a couple of extra entries. I've read a little bit
about them, but so far am unable to determine if their existence indicates
a better or worse kernel config.

[    1.036309] AMD-Vi: Lazy IO/TLB flushing enabled
[    1.036419] PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
[    1.036529] software IO TLB [mem 0xba61a000-0xbe61a000] (64MB) mapped at
[ffffa3b87a61a000-ffffa3b87e619fff]
[    1.036744] perf: AMD NB counters detected

And the Linux AGP Driver ( in-kernel ) is working now.
>
> Now this is showing properly with lspci :
> 00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD/ATI] RD890S/RD990 I/O
> Memory Management Unit (IOMMU)
>

Same.