| .. SPDX-License-Identifier: GPL-2.0 |
| |
| ========================== |
| One Device per Host Bridge |
| ========================== |
| |
| This system has a single socket with two CXL host bridges. Each host bridge |
| has a single CXL memory expander with a 4GB of memory. |
| |
| Things to note: |
| |
| * Cross-Bridge interleave is not being used. |
| * The expanders are in two separate but adjascent memory regions. |
| * This CEDT/SRAT describes one node per device |
| * The expanders have the same performance and will be in the same memory tier. |
| |
| :doc:`CEDT <../acpi/cedt>`:: |
| |
| Subtable Type : 00 [CXL Host Bridge Structure] |
| Reserved : 00 |
| Length : 0020 |
| Associated host bridge : 00000007 |
| Specification version : 00000001 |
| Reserved : 00000000 |
| Register base : 0000010370400000 |
| Register length : 0000000000010000 |
| |
| Subtable Type : 00 [CXL Host Bridge Structure] |
| Reserved : 00 |
| Length : 0020 |
| Associated host bridge : 00000006 |
| Specification version : 00000001 |
| Reserved : 00000000 |
| Register base : 0000010380800000 |
| Register length : 0000000000010000 |
| |
| Subtable Type : 01 [CXL Fixed Memory Window Structure] |
| Reserved : 00 |
| Length : 002C |
| Reserved : 00000000 |
| Window base address : 0000001000000000 |
| Window size : 0000000100000000 |
| Interleave Members (2^n) : 00 |
| Interleave Arithmetic : 00 |
| Reserved : 0000 |
| Granularity : 00000000 |
| Restrictions : 0006 |
| QtgId : 0001 |
| First Target : 00000007 |
| |
| Subtable Type : 01 [CXL Fixed Memory Window Structure] |
| Reserved : 00 |
| Length : 002C |
| Reserved : 00000000 |
| Window base address : 0000001100000000 |
| Window size : 0000000100000000 |
| Interleave Members (2^n) : 00 |
| Interleave Arithmetic : 00 |
| Reserved : 0000 |
| Granularity : 00000000 |
| Restrictions : 0006 |
| QtgId : 0001 |
| First Target : 00000006 |
| |
| :doc:`SRAT <../acpi/srat>`:: |
| |
| Subtable Type : 01 [Memory Affinity] |
| Length : 28 |
| Proximity Domain : 00000001 |
| Reserved1 : 0000 |
| Base Address : 0000001000000000 |
| Address Length : 0000000100000000 |
| Reserved2 : 00000000 |
| Flags (decoded below) : 0000000B |
| Enabled : 1 |
| Hot Pluggable : 1 |
| Non-Volatile : 0 |
| |
| Subtable Type : 01 [Memory Affinity] |
| Length : 28 |
| Proximity Domain : 00000002 |
| Reserved1 : 0000 |
| Base Address : 0000001100000000 |
| Address Length : 0000000100000000 |
| Reserved2 : 00000000 |
| Flags (decoded below) : 0000000B |
| Enabled : 1 |
| Hot Pluggable : 1 |
| Non-Volatile : 0 |
| |
| :doc:`HMAT <../acpi/hmat>`:: |
| |
| Structure Type : 0001 [SLLBI] |
| Data Type : 00 [Latency] |
| Target Proximity Domain List : 00000000 |
| Target Proximity Domain List : 00000001 |
| Target Proximity Domain List : 00000002 |
| Entry : 0080 |
| Entry : 0100 |
| Entry : 0100 |
| |
| Structure Type : 0001 [SLLBI] |
| Data Type : 03 [Bandwidth] |
| Target Proximity Domain List : 00000000 |
| Target Proximity Domain List : 00000001 |
| Target Proximity Domain List : 00000002 |
| Entry : 1200 |
| Entry : 0200 |
| Entry : 0200 |
| |
| :doc:`SLIT <../acpi/slit>`:: |
| |
| Signature : "SLIT" [System Locality Information Table] |
| Localities : 0000000000000003 |
| Locality 0 : 10 20 20 |
| Locality 1 : FF 0A FF |
| Locality 2 : FF FF 0A |
| |
| :doc:`DSDT <../acpi/dsdt>`:: |
| |
| Scope (_SB) |
| { |
| Device (S0D0) |
| { |
| Name (_HID, "ACPI0016" /* Compute Express Link Host Bridge */) // _HID: Hardware ID |
| ... |
| Name (_UID, 0x07) // _UID: Unique ID |
| } |
| ... |
| Device (S0D5) |
| { |
| Name (_HID, "ACPI0016" /* Compute Express Link Host Bridge */) // _HID: Hardware ID |
| ... |
| Name (_UID, 0x06) // _UID: Unique ID |
| } |
| } |
