linux-kernel - [PATCH v2 7/7] x86/CPU/AMD: Output the AGESA version to the logs

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] [day] [month] [year] [list]

Message-ID: <20251216123354.9219-8-superm1@kernel.org>
Date: Tue, 16 Dec 2025 06:33:54 -0600
From: "Mario Limonciello (AMD)" <superm1@...nel.org>
To: Yazen Ghannam <yazen.ghannam@....com>,
	x86@...nel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
	Jean Delvare <jdelvare@...e.com>
Cc: Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H . Peter Anvin" <hpa@...or.com>,
	linux-kernel@...r.kernel.org,
	"Mario Limonciello (AMD)" <superm1@...nel.org>
Subject: [PATCH v2 7/7] x86/CPU/AMD: Output the AGESA version to the logs

On AMD Zen platforms that are running AGESA, there is sometimes
DMI additional string for the AGESA version that can be helpful when
debugging an issue.  If this string is found output to kernel logs.

Signed-off-by: Mario Limonciello (AMD) <superm1@...nel.org>
---
 arch/x86/kernel/cpu/amd.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index c19c4ee74dd1f..8f44439d3f993 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0-only
 #define pr_fmt(fmt) "x86/amd: " fmt
 
+#include <linux/dmi.h>
 #include <linux/export.h>
 #include <linux/bitops.h>
 #include <linux/elf.h>
@@ -1406,3 +1407,20 @@ static __init int print_s5_reset_status_mmio(void)
 	return 0;
 }
 late_initcall(print_s5_reset_status_mmio);
+
+#ifdef CONFIG_DMI
+static __init int print_agesa_dmi_info(void)
+{
+	const struct dmi_device *dev = NULL;
+
+	while ((dev = dmi_find_device(DMI_DEV_TYPE_ADDITIONAL, NULL, dev))) {
+		if (!strncmp(dev->name, "AGESA", 5)) {
+			pr_info("%s\n", dev->name);
+			break;
+		}
+	}
+
+	return 0;
+}
+late_initcall(print_agesa_dmi_info);
+#endif
-- 
2.43.0