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| author | Tony Luck <tony.luck@intel.com> | 2025-05-05 10:38:19 -0700 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2025-05-12 15:43:16 +0200 |
| commit | 0a07a5af234b8cc6c2982e5c1e7bdff806902e16 (patch) | |
| tree | fe3e0e1c3b17781d7e281799f84fc3b78822fe54 | |
| parent | ACPI: MRRM: Add /sys files to describe memory ranges (diff) | |
| download | linux-0a07a5af234b8cc6c2982e5c1e7bdff806902e16.tar.gz linux-0a07a5af234b8cc6c2982e5c1e7bdff806902e16.zip | |
ACPI: Add documentation for exposing MRRM data
Initial implementation provides enumeration of the address ranges
NUMA node numbers, and BIOS assigned region IDs for each range.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://patch.msgid.link/20250505173819.419271-4-tony.luck@intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | Documentation/ABI/testing/sysfs-firmware-acpi | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-firmware-acpi b/Documentation/ABI/testing/sysfs-firmware-acpi index 5249ad5a96d9..f4de60c4134d 100644 --- a/Documentation/ABI/testing/sysfs-firmware-acpi +++ b/Documentation/ABI/testing/sysfs-firmware-acpi @@ -248,3 +248,24 @@ Description: # cat ff_pwr_btn 7 enabled +What: /sys/firmware/acpi/memory_ranges/rangeX +Date: February 2025 +Contact: Tony Luck <tony.luck@intel.com> +Description: + On systems with the ACPI MRRM table reports the parameters for + each range. + + base: Starting system physical address. + + length: Length of this range in bytes. + + node: NUMA node that this range belongs to. Negative numbers + indicate that the node number could not be determined (e.g + for an address range that is reserved for future hot add of + memory). + + local_region_id: ID associated with access by agents + local to this range of addresses. + + remote_region_id: ID associated with access by agents + non-local to this range of addresses. |