linux-kernel - [PATCH v1 17/20] ACPICA: HMAT: Add extended linear address mode to MSCIS

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <46631863.fMDQidcC6G@rjwysocki.net>
Date: Thu, 29 Aug 2024 20:41:57 +0200
From: "Rafael J. Wysocki" <rjw@...ysocki.net>
To: Linux ACPI <linux-acpi@...r.kernel.org>
Cc: LKML <linux-kernel@...r.kernel.org>, Bob Moore <robert.moore@...el.com>,
 Saket Dumbre <saket.dumbre@...el.com>
Subject:
 [PATCH v1 17/20] ACPICA: HMAT: Add extended linear address mode to MSCIS

From: Dave Jiang <dave.jiang@...el.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@...el.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
---
 include/acpi/actbl1.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

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)
-- 
2.43.0