#13381: IOMMU IRQ routing panic on UEFI Ryzen 7 X370 system
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Reporter: kallisti5 | Owner: nobody
Type: bug | Status: assigned
Priority: normal | Milestone: Unscheduled
Component: System/Kernel | Version: R1/Development
Resolution: | Keywords: IOMMU
Blocked By: | Blocking:
Has a Patch: 1 | Platform: All
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Comment (by kallisti5):
We're talking about checking for bus 0, device 0 and only raising a
warning instead of a panic in this case. Another option is to detect the
device type of IOMMU and simply raise a TODO around better IOMMU knowledge
(in-case someone wants to implement an IOMMU driver someday)
the IVRS table in acpi confirms the device via the DeviceID below:
(found in AMD's IOMMU spec, page 254
http://support.amd.com/TechDocs/48882_IOMMU.pdf)
{{{
[000h 0000 4] Signature : "IVRS" [I/O
Virtualization Reporting Structure]
[004h 0004 4] Table Length : 000000D0
[008h 0008 1] Revision : 02
[009h 0009 1] Checksum : 94
[00Ah 0010 6] Oem ID : ""
[010h 0016 8] Oem Table ID : ""
[018h 0024 4] Oem Revision : 00000001
[01Ch 0028 4] Asl Compiler ID : "AMD "
[020h 0032 4] Asl Compiler Revision : 00000000
[024h 0036 4] Virtualization Info : 00203041
[028h 0040 8] Reserved : 0000000000000000
[030h 0048 1] Subtable Type : 10 [Hardware Definition
Block]
[031h 0049 1] Flags : B0
[032h 0050 2] Length : 0048
[034h 0052 2] DeviceId : 0002
}}}
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Ticket URL: <https://dev.haiku-os.org/ticket/13381#comment:11>
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