Module ivrs 

IVRS (I/O Virtualization Reporting Structure) : AMD IOMMU ACPI table.

Defines the structures and parser for the ACPI IVRS table (signature IVRS), which describes AMD IOMMU hardware units, their capabilities, and which PCI devices they serve.

Reference: AMD I/O Virtualization Technology (IOMMU) Specification, revisions 3.00+ (sections 3.1–3.4). https://www.amd.com/content/dam/amd/en/documents/processor-tech-docs/specifications/48882_IOMMU.pdf

Table layout

┌──────────────────────────────┐
│  SDT header ("IVRS")         │ 48 B (standard ACPI)
├──────────────────────────────┤
│  IVInfo (u16)                │
│  Reserved (u8)               │
│  Flags (u8)                  │
│  Total length (u16)          │
│  Device entry count (u16)    │
│  Entry offset (u16)          │
├──────────────────────────────┤
│  IVHD block (Type 0x10/11)   │ variable
│  ├── header                  │
│  ├── device entries ...      │
│  └── padding                 │
├──────────────────────────────┤
│  IVMD block (Type 0x20/22)   │ variable
└──────────────────────────────┘

Structs

IvhdBlock

Parsed IVHD (I/O Virtualization Hardware Definition) block.

IvhdDevEntryIter

Iterator over device entries inside an IVHD block.

IvhdDeviceEntry

A device entry inside an IVHD block.

IvhdFlags

IVHD block flags.

IvmdBlock

IVMD (I/O Virtualisation Memory Definition) block.

Ivrs

Top-level IVRS table wrapper.

IvrsEntryIter

Iterator over IVHD/IVMD blocks and device entries therein.

IvrsHeader

Fixed header of the IVRS ACPI table (AMD IOMMU).

RawDevEntryHdr 🔒

Raw header common to all device entry types.

RawIvhdCommon 🔒

Common prefix of all IVHD headers (20 bytes, shared by type 0x10 and 0x11).

RawIvhdTail11 🔒

Raw IVHD type 0x11 (extended) appends an MMIO base after the common prefix.

RawIvmd 🔒

Raw IVMD block header : 24 bytes.

Enums

IvhdType

IVHD (I/O Virtualization Hardware Definition) block type.

IvrsBlock

A block inside the IVRS table: either an IVHD (IOMMU definition) or an IVMD (reserved memory definition).

Constants

IVRS_SIGNATURE

ACPI signature for the IVRS table.

Functions

decode_dev_entry_type 🔒

Decode a device entry type to determine size, range-ness, and ext data.