From: Fenghua Yu <fenghua.yu@xxxxxxxxx>
The MRRM table describes association between physical address ranges
and "region numbers". This is used by:
1) The /sys/fs/resctrl filesystem to report memory traffic per-RMID for
each region.
2) Perf subsystem to report memory related uncore events per region.
Structure defined in the Intel Resource Director Technology (RDT)
Architecture specification downloadable from www.intel.com/sdm
Signed-off-by: Fenghua Yu <fenghua.yu@xxxxxxxxx>
Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
---
include/acpi/actbl3.h | 40 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/include/acpi/actbl3.h b/include/acpi/actbl3.h
index 5cd755143b7d..1b9a03ff73ba 100644
--- a/include/acpi/actbl3.h
+++ b/include/acpi/actbl3.h
@@ -42,6 +42,7 @@
#define ACPI_SIG_WSMT "WSMT" /* Windows SMM Security Mitigations Table */
#define ACPI_SIG_XENV "XENV" /* Xen Environment table */
#define ACPI_SIG_XXXX "XXXX" /* Intermediate AML header for ASL/ASL+ converter */
+#define ACPI_SIG_MRRM "MRRM" /* Memory Range and Region Mapping table */
/*
* All tables must be byte-packed to match the ACPI specification, since
@@ -793,6 +794,45 @@ struct acpi_table_xenv {
u8 event_flags;
};
+/*******************************************************************************
+ *
+ * MRRM - Memory Range and Region Mapping (MRRM) table
+ *
+ ******************************************************************************/
+
+struct acpi_table_mrrm {
+ struct acpi_table_header header;
+ u8 max_mem_region; /* Max Memory Regions supported */
+ u8 flags; /* Region assignment type */
+ u8 reserved[26];
+ /* Memory range entry array */
+};
+#define ACPI_MRRM_FLAGS_REGION_ASSIGNMENT_OS (1<<0)
+
+/*******************************************************************************
+ *
+ * Memory Range entry - Memory Range entry in MRRM table
+ *
+ ******************************************************************************/
+
+struct acpi_table_mrrm_mem_range_entry {
+ u16 type; /* Type 0="MRRM" */
+ u16 length; /* 32B + sizeof(Region-ID Programming Reg[]) */
+ u32 reserved; /* Reserved */
+ u32 base_addr_low; /* Low 32 bits of base addr of the mem range */
+ u32 base_addr_high; /* High 32 bits of base addr of the mem range */
+ u32 len_low; /* Low 32 bits of length of the mem range */
+ u32 len_high; /* High 32 bits of 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[] */
+};
+
+#define ACPI_MRRM_VALID_REGION_ID_FLAGS_LOCAL (1<<0)
+#define ACPI_MRRM_VALID_REGION_ID_FLAGS_REMOTE (1<<1)
+
/* Reset to default packing */
#pragma pack()
--
2.48.1
