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[v1,17/20] ACPICA: HMAT: Add extended linear address mode to MSCIS

Message ID 46631863.fMDQidcC6G@rjwysocki.net
State New
Headers show
Series ACPICA: Release 20240827 | expand

Commit Message

Rafael J. Wysocki Aug. 29, 2024, 6:41 p.m. UTC 
From: Dave Jiang <dave.jiang@intel.com>

ACPICA commit aaa08569b81aa4d9ff59f91f00e589e98d499e6c

Redefine the 2 reserved bytes at offset 28 of Memory Side Cache Information
Structure as "Address Mode" and add defines of the new value.

    * 0 - Reserved (Unkown Address Mode)
    * 1 - Extended-linear (N direct-map aliases linearly mapped)
    * 2..65535 - Reserved (Unknown Address Mode)

Link: https://github.com/acpica/acpica/commit/aaa08569
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---
 include/acpi/actbl1.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
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Patch

diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
index 89f0df489dc3..199afc2cd122 100644
--- a/include/acpi/actbl1.h
+++ b/include/acpi/actbl1.h
@@ -1796,7 +1796,7 @@  struct acpi_hmat_cache {
 	u32 reserved1;
 	u64 cache_size;
 	u32 cache_attributes;
-	u16 reserved2;
+	u16 address_mode;
 	u16 number_of_SMBIOShandles;
 };
 
@@ -1808,6 +1808,9 @@  struct acpi_hmat_cache {
 #define ACPI_HMAT_WRITE_POLICY          (0x0000F000)
 #define ACPI_HMAT_CACHE_LINE_SIZE       (0xFFFF0000)
 
+#define ACPI_HMAT_CACHE_MODE_UNKNOWN            (0)
+#define ACPI_HMAT_CACHE_MODE_EXTENDED_LINEAR    (1)
+
 /* Values for cache associativity flag */
 
 #define ACPI_HMAT_CA_NONE                     (0)