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On 05/21/2017 06:12 PM, Adam Carter wrote: |
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> <snip> |
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> |
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> > [ 0.991863] iommu: Adding device 0000:06:00.0 to group 12 |
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> > [ 0.991982] iommu: Adding device 0000:07:04.0 to group 12 |
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> > [ 1.063849] AMD-Vi: Found IOMMU at 0000:00:00.2 cap 0x40 |
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> > [ 1.063962] AMD-Vi: Interrupt remapping enabled |
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> > [ 1.064145] AMD-Vi: Lazy IO/TLB flushing enabled |
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> > [ 1.065331] perf: AMD NB counters detected |
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> |
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> |
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> I'm similar, but have a couple of extra entries. I've read a little bit |
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> about them, but so far am unable to determine if their existence |
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> indicates a better or worse kernel config. |
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> |
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> [ 1.036309] AMD-Vi: Lazy IO/TLB flushing enabled |
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> [ 1.036419] PCI-DMA: Using software bounce buffering for IO (SWIOTLB) |
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> [ 1.036529] software IO TLB [mem 0xba61a000-0xbe61a000] (64MB) mapped |
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> at [ffffa3b87a61a000-ffffa3b87e619fff] |
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> [ 1.036744] perf: AMD NB counters detected |
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> |
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> And the Linux AGP Driver ( in-kernel ) is working now. |
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> |
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> Now this is showing properly with lspci : |
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> 00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD/ATI] RD890S/RD990 I/O |
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> Memory Management Unit (IOMMU) |
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> |
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> |
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> Same. |
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The (SWIOTLB) should not be the default. |
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What kernel parameters for IOMMUs are you using now? |
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The listed result I posted is with nothing related to IOMMUs in the |
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kernel parameters, and NO GART IOMMU support compiled. |
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Corbin |
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