ABI providing users with a mapping between physical address ranges and "region id" used by perf for uncore memory events and the resctrl file system for per-region memory monitoring and control. Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx> --- .../ABI/testing/sysfs-devices-memory | 32 +++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-devices-memory b/Documentation/ABI/testing/sysfs-devices-memory index cec65827e602..fb01739e016e 100644 --- a/Documentation/ABI/testing/sysfs-devices-memory +++ b/Documentation/ABI/testing/sysfs-devices-memory @@ -118,3 +118,35 @@ Description: (RO) indicates whether or not the kernel updates relevant kexec segments on memory hot un/plug and/or on/offline events, avoiding the need to reload kdump kernel. + +What: /sys/devices/system/memory/rangeX/base +Date: January 2025 +Contact: Tony Luck <tony.luck@xxxxxxxxx> +Description: + On systems with the ACPI MRRM table reports the + base system physical address of memory range X. + +What: /sys/devices/system/memory/rangeX/length +Date: January 2025 +Contact: Tony Luck <tony.luck@xxxxxxxxx> +Description: + On systems with the ACPI MRRM table reports the + size of rangeX system physical memory. + +What: /sys/devices/system/memory/rangeX/local_region_id +Date: January 2025 +Contact: Tony Luck <tony.luck@xxxxxxxxx> +Description: + On systems with the ACPI MRRM table reports the + the region id associated with memory access by + agents local to this range of addresses. Reports + 0xff when no region id has been assigned. + +What: /sys/devices/system/memory/rangeX/remote_region_id +Date: January 2025 +Contact: Tony Luck <tony.luck@xxxxxxxxx> +Description: + On systems with the ACPI MRRM table reports the + the region id associated with memory access by + agents non-local to this range of addresses. Reports + 0xff when no region id has been assigned. -- 2.48.1
