[PATCH v4 1/4] ACPICA: Define MRRM ACPI table

Tony Luck
2025-04-29T20:24:21Z

Patch for reference, this has already been applied to
https://github.com/acpica/acpica and will in due course make its way
into Linux when the next ACPICA release is ported over.

Signed-off-by: Tony Luck <tony.luck@intel.com>
---
include/acpi/actbl1.h | 7 +++++++
include/acpi/actbl2.h | 42 ++++++++++++++++++++++++++++++++++++++++++
2 files changed, 49 insertions(+)

diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
index 387fc821703a..4cb36392e9e9 100644
--- a/include/acpi/actbl1.h
+++ b/include/acpi/actbl1.h
@@ -110,6 +110,13 @@ struct acpi_whea_header {
u64 mask; /* Bitmask required for this register instruction */
};

+/* Larger subtable header (when Length can exceed 255) */
+
+struct acpi_subtbl_hdr_16 {
+ u16 type;
+ u16 length;
+};
+
/* https://docs.microsoft.com/en-us/windows-hardware/drivers/ddi/acpitabl/ns-acpitabl-aspt_table */
#define ASPT_REVISION_ID 0x01
struct acpi_table_aspt {
diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h
index 2e917a8f8bca..e7423db6e24b 100644
--- a/include/acpi/actbl2.h
+++ b/include/acpi/actbl2.h
@@ -37,6 +37,7 @@
#define ACPI_SIG_MCHI "MCHI" /* Management Controller Host Interface table */
#define ACPI_SIG_MPAM "MPAM" /* Memory System Resource Partitioning and Monitoring Table */
#define ACPI_SIG_MPST "MPST" /* Memory Power State Table */
+#define ACPI_SIG_MRRM "MRRM" /* Memory Range and Region Mapping table */
#define ACPI_SIG_MSDM "MSDM" /* Microsoft Data Management Table */
#define ACPI_SIG_NFIT "NFIT" /* NVDIMM Firmware Interface Table */
#define ACPI_SIG_NHLT "NHLT" /* Non HD Audio Link Table */
@@ -1736,6 +1737,47 @@ struct acpi_msct_proximity {
u64 memory_capacity; /* In bytes */
};

+/*******************************************************************************
+ *
+ * MRRM - Memory Range and Region Mapping (MRRM) table
+ * Conforms to "Intel Resource Director Technology Architecture Specification"
+ * Version 1.1, January 2025
+ *
+ ******************************************************************************/
+
+struct acpi_table_mrrm {
+ struct acpi_table_header header; /* Common ACPI table header */
+ u8 max_mem_region; /* Max Memory Regions supported */
+ u8 flags; /* Region assignment type */
+ u8 reserved[26];
+ u8 memory_range_entry[];
+};
+
+/* Flags */
+#define ACPI_MRRM_FLAGS_REGION_ASSIGNMENT_OS (1<<0)
+
+/*******************************************************************************
+ *
+ * Memory Range entry - Memory Range entry in MRRM table
+ *
+ ******************************************************************************/
+
+struct acpi_mrrm_mem_range_entry {
+ struct acpi_subtbl_hdr_16 header;
+ u32 reserved0; /* Reserved */
+ u64 addr_base; /* Base addr of the mem range */
+ u64 addr_len; /* Length of the mem range */
+ u16 region_id_flags; /* Valid local or remote Region-ID */
+ u8 local_region_id; /* Platform-assigned static local Region-ID */
+ u8 remote_region_id; /* Platform-assigned static remote Region-ID */
+ u32 reserved1; /* Reserved */
+ /* Region-ID Programming Registers[] */
+};
+
+/* Values for region_id_flags above */
+#define ACPI_MRRM_VALID_REGION_ID_FLAGS_LOCAL (1<<0)
+#define ACPI_MRRM_VALID_REGION_ID_FLAGS_REMOTE (1<<1)
+
/*******************************************************************************
*
* MSDM - Microsoft Data Management table
--
2.48.1