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Listed the fault codes reported for faults detected by Page Request.
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@ved-rivos
ved-rivos committed May 4, 2024
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9 changes: 5 additions & 4 deletions iommu_data_structures.adoc
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Expand Up @@ -1351,11 +1351,12 @@ of "Page Request".
a "Page Request Group Response" message to the device.
When the IOMMU generates the response, the status field of the response depends
on the cause of the error.
on the cause of the error. If a fault condition prevents locating a valid device
context then the `PRPR` value assumed is 0.
The status is set to Response Failure if the following faults are encountered:
* `ddtp.iommu_mode` is `Off`
* `ddtp.iommu_mode` is `Off` (cause = 256)
* DDT entry load access fault (cause = 257)
* DDT entry misconfigured (cause = 259)
* DDT entry not valid (cause = 258)
Expand All @@ -1364,8 +1365,8 @@ The status is set to Response Failure if the following faults are encountered:
The status is set to Invalid Request if the following faults are encountered:
* `ddtp.iommu_mode` is `Bare`
* `EN_PRI` is set to 0
* `ddtp.iommu_mode` is `Bare` (cause = 260)
* `EN_PRI` is set to 0 (cause = 260)
The status is set to Success if no other faults were encountered but the
"Page Request" could not be queued due to the page-request queue being full
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