summaryrefslogtreecommitdiff
path: root/Documentation/driver-api/cxl/platform/example-configurations/flexible.rst
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/driver-api/cxl/platform/example-configurations/flexible.rst')
-rw-r--r--Documentation/driver-api/cxl/platform/example-configurations/flexible.rst296
1 files changed, 296 insertions, 0 deletions
diff --git a/Documentation/driver-api/cxl/platform/example-configurations/flexible.rst b/Documentation/driver-api/cxl/platform/example-configurations/flexible.rst
new file mode 100644
index 000000000000..dab704b6fcc2
--- /dev/null
+++ b/Documentation/driver-api/cxl/platform/example-configurations/flexible.rst
@@ -0,0 +1,296 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+=====================
+Flexible Presentation
+=====================
+This system has a single socket with two CXL host bridges. Each host bridge
+has two CXL memory expanders with a 4GB of memory (32GB total).
+
+On this system, the platform designer wanted to provide the user flexibility
+to configure the memory devices in various interleave or NUMA node
+configurations. So they provided every combination.
+
+Things to note:
+
+* Cross-Bridge interleave is described in one CFMWS that covers all capacity.
+* One CFMWS is also described per-host bridge.
+* One CFMWS is also described per-device.
+* This SRAT describes one node for each of the above CFMWS.
+* The HMAT describes performance for each node in the SRAT.
+
+: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 : 0000000400000000
+ Interleave Members (2^n) : 01
+ Interleave Arithmetic : 00
+ Reserved : 0000
+ Granularity : 00000000
+ Restrictions : 0006
+ QtgId : 0001
+ First Target : 00000007
+ Second Target : 00000006
+
+ Subtable Type : 01 [CXL Fixed Memory Window Structure]
+ Reserved : 00
+ Length : 002C
+ Reserved : 00000000
+ Window base address : 0000002000000000
+ Window size : 0000000200000000
+ 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 : 0000002200000000
+ Window size : 0000000200000000
+ Interleave Members (2^n) : 00
+ Interleave Arithmetic : 00
+ Reserved : 0000
+ Granularity : 00000000
+ Restrictions : 0006
+ QtgId : 0001
+ First Target : 00000006
+
+ Subtable Type : 01 [CXL Fixed Memory Window Structure]
+ Reserved : 00
+ Length : 002C
+ Reserved : 00000000
+ Window base address : 0000003000000000
+ 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 : 0000003100000000
+ 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 : 0000003200000000
+ Window size : 0000000100000000
+ Interleave Members (2^n) : 00
+ Interleave Arithmetic : 00
+ Reserved : 0000
+ Granularity : 00000000
+ Restrictions : 0006
+ QtgId : 0001
+ First Target : 00000006
+
+ Subtable Type : 01 [CXL Fixed Memory Window Structure]
+ Reserved : 00
+ Length : 002C
+ Reserved : 00000000
+ Window base address : 0000003300000000
+ 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 : 0000000400000000
+ 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 : 0000002000000000
+ Address Length : 0000000200000000
+ Reserved2 : 00000000
+ Flags (decoded below) : 0000000B
+ Enabled : 1
+ Hot Pluggable : 1
+ Non-Volatile : 0
+
+ Subtable Type : 01 [Memory Affinity]
+ Length : 28
+ Proximity Domain : 00000003
+ Reserved1 : 0000
+ Base Address : 0000002200000000
+ Address Length : 0000000200000000
+ Reserved2 : 00000000
+ Flags (decoded below) : 0000000B
+ Enabled : 1
+ Hot Pluggable : 1
+ Non-Volatile : 0
+
+ Subtable Type : 01 [Memory Affinity]
+ Length : 28
+ Proximity Domain : 00000004
+ Reserved1 : 0000
+ Base Address : 0000003000000000
+ 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 : 00000005
+ Reserved1 : 0000
+ Base Address : 0000003100000000
+ 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 : 00000006
+ Reserved1 : 0000
+ Base Address : 0000003200000000
+ 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 : 00000007
+ Reserved1 : 0000
+ Base Address : 0000003300000000
+ 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
+ Target Proximity Domain List : 00000003
+ Target Proximity Domain List : 00000004
+ Target Proximity Domain List : 00000005
+ Target Proximity Domain List : 00000006
+ Target Proximity Domain List : 00000007
+ Entry : 0080
+ Entry : 0100
+ Entry : 0100
+ Entry : 0100
+ Entry : 0100
+ Entry : 0100
+ 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
+ Target Proximity Domain List : 00000003
+ Target Proximity Domain List : 00000004
+ Target Proximity Domain List : 00000005
+ Target Proximity Domain List : 00000006
+ Target Proximity Domain List : 00000007
+ Entry : 1200
+ Entry : 0400
+ Entry : 0200
+ Entry : 0200
+ Entry : 0100
+ Entry : 0100
+ Entry : 0100
+ Entry : 0100
+
+:doc:`SLIT <../acpi/slit>`::
+
+ Signature : "SLIT" [System Locality Information Table]
+ Localities : 0000000000000003
+ Locality 0 : 10 20 20 20 20 20 20 20
+ Locality 1 : FF 0A FF FF FF FF FF FF
+ Locality 2 : FF FF 0A FF FF FF FF FF
+ Locality 3 : FF FF FF 0A FF FF FF FF
+ Locality 4 : FF FF FF FF 0A FF FF FF
+ Locality 5 : FF FF FF FF FF 0A FF FF
+ Locality 6 : FF FF FF FF FF FF 0A FF
+ Locality 7 : FF FF FF FF FF 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
+ }
+ }
generated by cgit (git 2.34.1) at 2025-06-05 23:52:56 +0000