Commit 0a07a5af authored by Tony Luck's avatar Tony Luck Committed by Rafael J. Wysocki
Browse files

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: default avatarTony Luck <tony.luck@intel.com>
Link: https://patch.msgid.link/20250505173819.419271-4-tony.luck@intel.com


Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 04f53540

Documentation/ABI/testing/sysfs-firmware-acpi

+21 −0
Original line number Diff line number Diff line
@@ -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.