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Message-ID: <20250227224828.306537-4-tony.luck@intel.com> Date: Thu, 27 Feb 2025 14:48:27 -0800 From: Tony Luck <tony.luck@...el.com> To: "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>, Len Brown <lenb@...nel.org> Cc: linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org, patches@...ts.linux.dev, Tony Luck <tony.luck@...el.com> Subject: [PATCH v2 3/4] ACPI: Add documentation for exposing MRRM data Initial implementation provides enumeration of the address ranges and BIOS assigned region IDs for each range. Signed-off-by: Tony Luck <tony.luck@...el.com> --- Documentation/ABI/testing/sysfs-firmware-acpi | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-firmware-acpi b/Documentation/ABI/testing/sysfs-firmware-acpi index 5249ad5a96d9..a3369cf95546 100644 --- a/Documentation/ABI/testing/sysfs-firmware-acpi +++ b/Documentation/ABI/testing/sysfs-firmware-acpi @@ -248,3 +248,19 @@ Description: # cat ff_pwr_btn 7 enabled +What: /sys/firmware/acpi/memory_ranges/rangeX +Date: February 2025 +Contact: Tony Luck <tony.luck@...el.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. + + 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. -- 2.48.1
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